Add Ukrainian localization (#158)

* Add support for a get_keys() equivalent for lower than 5.7 Minetest versions

* Do not call the function itself to check if it exists

Co-authored-by: luk3yx <luk3yx@users.noreply.github.com>

* Do not call the function itself to check if it exists (2)

Co-authored-by: luk3yx <luk3yx@users.noreply.github.com>

* Fix an occurrence of get_keys() in is_uuid_existing()

---------

Co-authored-by: luk3yx <luk3yx@users.noreply.github.com>

.gitattributes

@@ -0,0 +1,5 @@
+mtt.lua export-ignore
+docker-compose.yml export-ignore
+*.spec.lua export-ignore
+test/* export-ignore
+screenshot_* export-ignore

.github/workflows/luacheck.yml

@@ -1,17 +1,10 @@
 name: luacheck
-
 on: [push, pull_request]
-
 jobs:
-  build:
-
+  luacheck:
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v1
-    - name: apt
-      run: sudo apt-get install -y luarocks
-    - name: luacheck install
-      run: luarocks install --local luacheck
-    - name: luacheck run
-      run: $HOME/.luarocks/bin/luacheck ./
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Luacheck
+        uses: lunarmodules/luacheck@master

.github/workflows/test.yml

@@ -9,9 +9,9 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        ENGINE_VERSION: [5.0.0, 5.1.0, 5.2.0, 5.3.0, 5.4.0, 5.5.0, 5.6.0, 5.6.1, latest]
+        ENGINE_VERSION: [5.0.1, 5.1.1, 5.2.0, 5.3.0, 5.4.1, 5.5.1, 5.6.1, 5.7.0, 5.8.0, 5.9.1, 5.10.0, latest]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: test
-      run: docker-compose up --exit-code-from sut
+      run: docker compose up --exit-code-from sut

.gitignore

@@ -1,2 +1,4 @@
 i18n.py
+mod_translation_updater.py
 locale/*.tr.old
+*.patch

.luacheckrc

@@ -5,15 +5,16 @@ globals = {
 read_globals = {
 	-- Stdlib
 	string = {fields = {"split"}},
-	table = {fields = {"copy", "getn"}},
+	table = {fields = {"copy", "getn", "indexof", "insert_all"}},
+	beerchat = {fields = {"has_player_muted_player", "execute_callbacks"}},
 
-	-- Minetest
-	"minetest",
+	-- Luanti
+	"core",
 	"vector", "ItemStack",
 	"dump",
 
 	-- Deps
-	"unified_inventory", "default",
+	"unified_inventory", "default", "sfinv_buttons",
 
 	-- optional mods
 	"mtt", "canonical_name"

README.md

@@ -5,37 +5,58 @@ Mail mod for Minetest (ingame mod)
 ![](https://github.com/mt-mods/mail/workflows/luacheck/badge.svg)
 [![ContentDB](https://content.minetest.net/packages/mt-mods/mail/shields/downloads/)](https://content.minetest.net/packages/mt-mods/mail/)
 
-This is a fork of cheapies mail mod
+This is a fork of @cheapie's mail mod.
 
-It adds a mail-system that allows players to send each other messages in-game and via webmail (optional)
+It adds a mail-system that allows players to send each other messages in-game and via webmail (optional).
 
 # Screenshot
 
-![](screenshot_1.1.0.png)
+![Main view](screenshot_1.4.0_1.png)
+![Message view](screenshot_1.4.0_2.png)
 
 # Installation
 
 ## In-game mail mod
 
-Install it like any other mod: copy the directory `mail_mod` to your "worldmods" folder or use the [contentdb](https://content.minetest.net)
+Install it like any other mod: copy the directory `mail_mod` to your "worldmods" folder or use the [ContentDB](https://content.minetest.net)
 
 ## Webmail
 
-To provide a web-based interface to receive/send mails you can use the [mtui](https://github.com/minetest-go/mtui) project
+To provide a web-based interface to receive/send mails you can use the [mtui](https://github.com/minetest-go/mtui) project.
 
 # Commands/Howto
 
-To access your mail click on the inventory mail button or use the "/mail" command
-Mails can be deleted, marked as read or unread, replied to and forwarded to another player
+To access your mail type `/mail` command or click on the mail button in your inventory (`unified_inventory`).
+
+Mails can be deleted, marked as read or unread, replied to and forwarded to another player. You can also manage your contacts and your mailing lists.
+
+# Features
+
+* Inbox page
+* Outbox page
+* Saved drafts
+* Read/unread marks
+* To/Cc/Bcc system
+* Intuitive UI
+* Contacts book
+* Mailing lists
+* Sorters/filters (new in 1.1.0)
+* Multiple selection (new in 1.1.0)
+* Settings
+* Chat, on join, HUD and sound notifications
+* Anti-spam detection
+* Translated in : English, French, German, Chinese (both traditional and simplified), Spanish, Brazilian Portuguese, Hungarian, Indonesian.
 
 # Compatibility / Migration
 
 Overview:
 * `v1` all the data is in the `<worldfolder>/mails.db` file
 * `v2` every player has its own (in-) mailbox in the `<worldfolder>/mails/<playername>.json` file
-* `v3` every player has an entry in the `<playername>` modstorage (inbox, outbox, contacts)
+* `v3` every player has an entry in the `<playername>` `mod_storage/` (inbox, outbox, drafts, contacts, mailing lists, settings)
+* `v3.1` database fix after the message id mess
 
 # Dependencies
+
 * None
 
 # License
@@ -45,34 +66,55 @@ See the "LICENSE" file
 # Textures
 * textures/email_mail.png (https://github.com/rubenwardy/email.git WTFPL)
 
-# Contributors
+# Contributors / Credits
 
 * Cheapie (Initial idea/project)
 * Rubenwardy (Lua/UI improvements)
 * BuckarooBanzay (Clean-ups, Refactoring)
-* Athozus (Outbox, Maillists, UI, Drafts)
+* Athozus (Outbox, Maillists, UI, Drafts, Trash, Settings)
 * SX (Various fixes, UI)
 * fluxionary (Minor fixups)
 * Toby1710 (UX fixes)
 * Peter Nerlich (CC, BCC)
-* Emojigit (Chinese translation)
+* Emojigit (Performance, Traditional Chinese translation)
 * Niklp09 (German translation)
+* Dennis Jenkins (UX fixes)
+* Thomas Rudin (Maintenance)
+* imre84 (UI fixes)
+* Chache (Spanish translation)
+* APercy (Brazilian Portuguese translation)
+* Nuno Filipe Povoa (mail_notif.ogg - https://invent.kde.org/plasma/oxygen-sounds/-/blob/master/sounds/Oxygen-Im-Nudge.ogg)
+* TheTrueBeginner (Simplified Chinese translation)
+* nyomi (Hungarian translation)
+* whosit (UI fixes)
+* Wuzzy (German translation)
+* savilli (UX fixes)
+* Panquesito7 (Maintenance)
+* Eredin (Spanish translation)
+* Muhammad Rifqi Priyo Susanto (Indonesian translation)
+* aBlueShadow (sfinv compatibility)
+* Singularis (UX and storage fixes)
 
 # Contribute
 
 You can contribute by :
-* Reporting an issue
-* Give a review on Content DB
-* Adding new features
-* Fixing an issue
-* Translate into a new language
-* Add documentation
+* Reporting an issue : Go to the [Issues](https://github.com/mt-mods/mail/issues) tab, click on the button **New issue** and type a short title then give many informations (Minetest version, tab where the bug occured, steps to reproduce the crash, etc.)
+* Give a review on ContentDB : [Just write ;)](https://content.minetest.net/packages/mt-mods/mail/review/)
+* Requesting new features : [Open an issue](https://github.com/mt-mods/mail/issues) and indicate what you need more in details.
+* Adding those new features : [Open a pull request](https://github.com/mt-mods/mail/pulls), and if issue(s) are linked, ping them (#number).
+* Fixing an issue : Same as before, open a pull request.
+* Translate into a new language : copy `locale/template.txt` into `locale/mail.<codelang>.tr`, and add translated strings (syntax : `not translated=translated`). Then, open a pull request. We're also working on opening a [Weblate](https://weblate.org) (free web interface) to translate strings easier.
+* Add documentation : adds `.md` (markdown) or `.txt` files and open a pull request.
 * ...
 
-You're encouraged to create a fork of this repo, then make your changes and create a pull request when it's done. If you do so, please also check "Git branches" section.
+You're encouraged to create a fork of this repo, then make your changes and create a pull request when it's done. ~~If you do so, please also check "Git branches" section.~~ (obsolete). Request for merging into `master`, if needed we will push into another branch.
+
+If you don't have a GitHub account, you can also contact maintainers to add manually your contributions.
 
 # Git branches
 
+***Caution : might be obsolete***
+
 * master : main branch, where are pushed releases and tags
 * dev : for new release works, A.B.C release to A.B+1.0
 * A.B.X : for fix releases (no new features), A.B.C release to A.B.C+1

api.lua

@@ -1,5 +1,8 @@
 -- see: mail.md
 
+-- translation
+local S = mail.S
+
 local f = string.format
 
 mail.registered_on_receives = {}
@@ -7,42 +10,49 @@ function mail.register_on_receive(func)
 	mail.registered_on_receives[#mail.registered_on_receives + 1] = func
 end
 
-mail.receive_mail_message = "You have a new message from %s! Subject: %s\nTo view it, type /mail"
-mail.read_later_message = "You can read your messages later by using the /mail command"
+mail.registered_on_player_receives = {}
+function mail.register_on_player_receive(func)
+	table.insert(mail.registered_on_player_receives, func)
+end
+
+mail.registered_recipient_handlers = {}
+function mail.register_recipient_handler(func)
+	table.insert(mail.registered_recipient_handlers, func)
+end
 
 function mail.send(m)
 	if type(m.from) ~= "string" then return false, "'from' is not a string" end
-	if type(m.to) ~= "string" then return false, "'to' is not a string" end
+	if type(m.to or "") ~= "string" then return false, "'to' is not a string" end
+	if type(m.cc or "") ~= "string" then return false, "'cc' is not a string" end
+	if type(m.bcc or "") ~= "string" then return false, "'bcc' is not a string" end
+	if type(m.subject or "") ~= "string" then return false, "'subject' is not a string" end
 	if type(m.body) ~= "string" then return false, "'body' is not a string" end
 
 	-- defaults
 	m.subject = m.subject or "(No subject)"
 
-	-- limit subject line
-	if string.len(m.subject) > 30 then
-		m.subject = string.sub(m.subject,1,27) .. "..."
-	end
-
 	-- normalize to, cc and bcc while compiling a list of all recipients
 	local recipients = {}
 	local undeliverable = {}
-	m.to = mail.concat_player_list(mail.extractMaillists(m.to, m.from))
-	m.to = mail.normalize_players_and_add_recipients(m.to, recipients, undeliverable)
+	m.to = mail.concat_player_list(mail.extract_maillists(m.to, m.from))
+	m.to = mail.normalize_players_and_add_recipients(m.from, m.to, recipients, undeliverable)
 	if m.cc then
-		m.cc = mail.concat_player_list(mail.extractMaillists(m.cc, m.from))
-		m.cc = mail.normalize_players_and_add_recipients(m.cc, recipients, undeliverable)
+		m.cc = mail.concat_player_list(mail.extract_maillists(m.cc, m.from))
+		m.cc = mail.normalize_players_and_add_recipients(mail.from, m.cc, recipients, undeliverable)
 	end
 	if m.bcc then
-		m.bcc = mail.concat_player_list(mail.extractMaillists(m.bcc, m.from))
-		m.bcc = mail.normalize_players_and_add_recipients(m.bcc, recipients, undeliverable)
+		m.bcc = mail.concat_player_list(mail.extract_maillists(m.bcc, m.from))
+		m.bcc = mail.normalize_players_and_add_recipients(m.from, m.bcc, recipients, undeliverable)
 	end
 
 	if next(undeliverable) then -- table is not empty
-		local undeliverable_names = {}
-		for name in pairs(undeliverable) do
-			undeliverable_names[#undeliverable_names + 1] = '"' .. name .. '"'
+		local undeliverable_reason = {S("The mail could not be sent:")}
+		for _, reason in pairs(undeliverable) do
+			table.insert(undeliverable_reason, reason)
 		end
-		return false, f("recipients %s don't exist; cannot send mail.", table.concat(undeliverable_names, ", "))
+		return false, table.concat(undeliverable_reason, "\n")
+	elseif not next(recipients) then
+		return false, S("You did not specify any valid recipient.")
 	end
 
 	local extra = {}
@@ -59,7 +69,7 @@ function mail.send(m)
 		extra_log = ""
 	end
 
-	minetest.log("action", f("[mail] %q send mail to %q%s with subject %q and body %q",
+	core.log("action", f("[mail] %q send mail to %q%s with subject %q and body %q",
 		m.from, m.to, extra_log, m.subject, m.body
 	))
 
@@ -85,24 +95,11 @@ function mail.send(m)
 	local entry = mail.get_storage_entry(m.from)
 	table.insert(entry.outbox, 1, msg)
 	mail.set_storage_entry(m.from, entry)
+	msg.spam = #mail.check_spam(msg) >= 1
 
 	-- add in every receivers inbox
-	for recipient in pairs(recipients) do
-		entry = mail.get_storage_entry(recipient)
-		table.insert(entry.inbox, msg)
-		mail.set_storage_entry(recipient, entry)
-	end
-
-	-- notify recipients that happen to be online
-	local mail_alert = f(mail.receive_mail_message, m.from, m.subject)
-	for _, player in ipairs(minetest.get_connected_players()) do
-		local name = player:get_player_name()
-		if recipients[name] then
-			minetest.chat_send_player(name, mail_alert)
-			local receiver_entry = mail.get_storage_entry(name)
-			local receiver_messages = receiver_entry.inbox
-			mail.hud_update(name, receiver_messages)
-		end
+	for _, deliver in pairs(recipients) do
+		deliver(msg)
 	end
 
 	for i=1, #mail.registered_on_receives do
@@ -116,18 +113,16 @@ end
 
 function mail.save_draft(m)
 	if type(m.from) ~= "string" then return false, "'from' is not a string" end
-	if type(m.to) ~= "string" then return false, "'to' is not a string" end
+	if type(m.to or "") ~= "string" then return false, "'to' is not a string" end
+	if type(m.cc or "") ~= "string" then return false, "'cc' is not a string" end
+	if type(m.bcc or "") ~= "string" then return false, "'bcc' is not a string" end
+	if type(m.subject or "") ~= "string" then return false, "'subject' is not a string" end
 	if type(m.body) ~= "string" then return false, "'body' is not a string" end
 
 	-- defaults
 	m.subject = m.subject or "(No subject)"
 
-	-- limit subject line
-	if string.len(m.subject) > 30 then
-		m.subject = string.sub(m.subject,1,27) .. "..."
-	end
-
-	minetest.log("verbose", f("[mail] %q saves draft with subject %q and body %q",
+	core.log("verbose", f("[mail] %q saves draft with subject %q and body %q",
 		m.from, m.subject, m.body
 	))
 

api.md

@@ -1,4 +1,3 @@
-
 # Mail format
 The mail format in the api hooks
 
@@ -34,7 +33,7 @@ local success, error = mail.send({
 ```
 
 # Hooks
-On-receive mail hook:
+Generic on-receive mail hook:
 
 ```lua
 mail.register_on_receive(function(m)
@@ -42,11 +41,35 @@ mail.register_on_receive(function(m)
 end)
 ```
 
+Player-specific on-receive mail hook:
+```lua
+mail.register_on_player_receive(function(player, msg)
+    -- "player" is the name of a recipient; "msg" is a mail object (see "Mail format")
+end)
+```
+
+# Recipient handler
+Recipient handlers are registered using
+
+```lua
+mail.register_recipient_handler(function(sender, name)
+end)
+```
+
+where `name` is the name of a single recipient.
+
+The recipient handler should return
+* `nil` if the handler does not handle messages sent to the particular recipient,
+* `true, player` (where `player` is a string or a list of strings) if the mail should be redirected to `player`,
+* `true, deliver` if the mail should be delivered by calling `deliver` with the message, or
+* `false, reason` (where `reason` is optional or, if provided, a string) if the recipient explicitly rejects the mail.
+
 # Internals
 
 mod-storage entry for a player (indexed by playername and serialized with json):
 ```lua
 {
+
 	contacts = {
 		{
 			-- name of the player (unique key in the list)
@@ -76,7 +99,9 @@ mod-storage entry for a player (indexed by playername and serialized with json):
 			-- timestamp (os.time())
 			time = 1234,
 			-- read-flag (true: player has read the mail, inbox only)
-			read = true
+			read = true,
+                        -- spam-flag (true: that mail is noted as a spam)
+                        spam = false
 		},{
 			...
 		}
@@ -84,6 +109,12 @@ mod-storage entry for a player (indexed by playername and serialized with json):
 	outbox = {
 		-- same format as "inbox"
 	},
+	drafts = {
+		-- same format as "inbox"
+	},
+	trash = {
+		-- same format as "inbox"
+	},
 	lists = {
 		{
 			-- name of the maillist (unique key in the list)
@@ -93,5 +124,10 @@ mod-storage entry for a player (indexed by playername and serialized with json):
 			-- playername list
 			players = {"playername", "playername2"}
 		}
+	},
+	settings = {
+		setting1 = "value",
+		setting2 = true,
+		setting3 = 123
 	}
 }

api.spec.lua

@@ -1,12 +1,76 @@
-mtt.register("send mail", function(callback)
-    -- send a mail
-    local success, err = mail.send({from = "player1", to = "player2", subject = "something", body = "blah"})
-    assert(success)
-    assert(not err)
+mail.register_recipient_handler(function(_, name)
+    if name:sub(1, 6) == "alias/" then
+        return true, name:sub(7)
+    elseif name == "list/test" then
+        return true, {"alias/player1", "alias/player2"}
+    elseif name == "list/reject" then
+        return false, "It works (?)"
+    end
+end)
+mail.update_maillist("player1", {
+	owner = "player1",
+	name = "recursive",
+	desc = "",
+	players = {"@recursive", "player1"},
+}, "recursive")
+
+local received_count = {}
+mail.register_on_player_receive(function(player)
+	received_count[player] = (received_count[player] or 0) + 1
+end)
+
+local sent_count = 0
+mail.register_on_receive(function()
+	sent_count = sent_count+1
+end)
+
+local function assert_inbox_count(player_name, count)
+    local entry = mail.get_storage_entry(player_name)
+    assert(entry, player_name .. " has no mail entry")
+    local actual_count = #entry.inbox
+    assert(actual_count == count, ("incorrect mail count: %d expected, got %d"):format(count, actual_count))
+    local player_received = received_count[player_name] or 0
+    assert(player_received == count, ("incorrect receive count: %d expected, got %d"):format(count, player_received))
+end
+
+local function assert_send(expected_success, ...)
+	local success, err = mail.send(...)
+	if expected_success then
+		assert(success, ("expected mail to be sent, got error message: %s"):format(err))
+		assert(not err, ("unexpected message after sending mail: %s"):format(err))
+	else
+		assert(not success, "expected mail to be rejected, mail was sent")
+		assert(type(err) == "string", ("expected error message, got datum of type %s"):format(type(err)))
+	end
+end
+
+mtt.register("send mail", function(callback)
+    -- local maillists
+    assert_send(true, {from = "player1", to = "@recursive", subject = "hello recursion", body = "blah"})
+    assert_inbox_count("player1", 1)
+    assert(sent_count == 1)
+
+    -- do not allow empty recipients
+    assert_send(false, {from = "player1", to = "@doesnotexist", subject = "should not be sent", body = "blah"})
+    assert(sent_count == 1)
+
+    -- send a mail to a list
+    assert_send(true, {from = "player1", to = "list/test", subject = "something", body = "blah"})
+    assert_inbox_count("player2", 1)
+    assert_inbox_count("player1", 1)
+    assert(sent_count == 2)
+
+    -- send a second mail to the list and also the sender
+    assert_send(true, {from = "player1", to = "list/test, alias/player1", subject = "something", body = "blah"})
+    assert_inbox_count("player2", 2)
+    assert_inbox_count("player1", 2)
+    assert(sent_count == 3)
+
+    -- send a mail to list/reject - the mail should be rejected
+    assert_send(false, {from = "player1", to = "list/reject", subject = "something", body = "NO"})
+    assert_inbox_count("player2", 2)
+    assert_inbox_count("player1", 2)
+    assert(sent_count == 3)
 
-    -- check the receivers inbox
-    local entry = mail.get_storage_entry("player2")
-    assert(entry)
-    assert(#entry.inbox > 0)
     callback()
 end)

chatcommands.lua

@@ -1,6 +1,10 @@
-minetest.register_chatcommand("mail",{
+core.register_chatcommand("mail",{
 	description = "Open the mail interface",
-	func = function(name)
-		mail.show_mail_menu(name)
+	func = function(name, param)
+		if #param > 0 then -- if param is not empty
+			mail.show_compose(name, param) -- make a new message
+		else
+			mail.show_mail_menu(name) -- show main menu
+		end
 	end
 })

docker-compose.yml

@@ -1,11 +1,11 @@
-version: "3.6"
+version: "4.1"
 
 services:
  sut:
   build:
    context: ./test
    args:
-    ENGINE_VERSION: ${ENGINE_VERSION:-5.5.0}
+    ENGINE_VERSION: ${ENGINE_VERSION:-5.7.0}
   user: root
   volumes:
     - "./:/root/.minetest/worlds/world/worldmods/mail/"

gui.lua

@@ -1,82 +1,5 @@
 
-function mail.compile_contact_list(name, selected, playernames)
-	-- TODO: refactor this - not just compiles *a* list, but *the* list for the contacts screen (too inflexible)
-	local formspec = {}
-	local contacts = mail.get_contacts(name)
-
-	if playernames == nil then
-		local length = 0
-		for k, contact, i, l in mail.pairsByKeys(contacts) do
-			if i == 1 then length = l end
-			formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = minetest.formspec_escape(contact.name)
-			formspec[#formspec + 1] = ","
-			local note = contact.note
-			-- display an ellipsis if the note spans multiple lines
-			local idx = string.find(note, '\n')
-			if idx ~= nil then
-				note = string.sub(note, 1, idx-1) .. ' ...'
-			end
-			formspec[#formspec + 1] = minetest.formspec_escape(note)
-			if type(selected) == "string" then
-				if string.lower(selected) == k then
-					selected = i
-				end
-			end
-		end
-		if length > 0 then
-			if selected and type(selected) == "number" then
-				formspec[#formspec + 1] = ";"
-				formspec[#formspec + 1] = tostring(selected + 1)
-			end
-			formspec[#formspec + 1] = "]"
-		else
-			formspec[#formspec + 1] = "]label[2,4.5;No contacts]"
-		end
-	else
-		if type(playernames) == "string" then
-			playernames = mail.parse_player_list(playernames)
-		end
-		for i,c in ipairs(playernames) do
-			formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = minetest.formspec_escape(c)
-			formspec[#formspec + 1] = ","
-			if contacts[string.lower(c)] == nil then
-				formspec[#formspec + 1] = ""
-			else
-				local note = contacts[string.lower(c)].note
-				-- display an ellipsis if the note spans multiple lines
-				local idx = string.find(note, '\n')
-				if idx ~= nil then
-					note = string.sub(note, 1, idx-1) .. ' ...'
-				end
-				formspec[#formspec + 1] = minetest.formspec_escape(note)
-			end
-			if not selected then
-				if type(selected) == "string" then
-					if string.lower(selected) == string.lower(c) then
-						selected = i
-					end
-				end
-			end
-		end
-		if #playernames > 0 and selected and type(selected) == "number" then
-			formspec[#formspec + 1] = ";"
-			formspec[#formspec + 1] = tostring(selected + 1)
-		end
-		formspec[#formspec + 1] = "]"
-	end
-	return table.concat(formspec, "")
-
-end
-
-if minetest.get_modpath("unified_inventory") then
-	mail.receive_mail_message = mail.receive_mail_message ..
-		" or use the mail button in the inventory"
-	mail.read_later_message = mail.read_later_message ..
-		" or by using the mail button in the inventory"
+if core.get_modpath("unified_inventory") then
 
 	unified_inventory.register_button("mail", {
 			type = "image",
@@ -87,3 +10,13 @@ if minetest.get_modpath("unified_inventory") then
 			end
 		})
 end
+
+if core.get_modpath("sfinv_buttons") then
+	sfinv_buttons.register_button("mail", {
+			title = "Mail",
+			image = "mail_button.png",
+			action = function(player)
+				mail.show_mail_menu(player:get_player_name())
+			end
+		})
+end

hud.lua

@@ -1,12 +1,12 @@
 
 local huddata = {}
 
-minetest.register_on_joinplayer(function(player)
+core.register_on_joinplayer(function(player)
 	local name = player:get_player_name()
 	local data = {}
 
 	data.imageid = player:hud_add({
-		hud_elem_type = "image",
+		type = "image",
 		name = "MailIcon",
 		position = {x=0.52, y=0.52},
 		text="",
@@ -15,7 +15,7 @@ minetest.register_on_joinplayer(function(player)
 	})
 
 	data.textid = player:hud_add({
-		hud_elem_type = "text",
+		type = "text",
 		name = "MailText",
 		position = {x=0.55, y=0.52},
 		text= "",
@@ -27,7 +27,7 @@ minetest.register_on_joinplayer(function(player)
 	huddata[name] = data
 end)
 
-minetest.register_on_leaveplayer(function(player)
+core.register_on_leaveplayer(function(player)
 	local name = player:get_player_name()
 	huddata[name] = nil
 end)
@@ -35,7 +35,7 @@ end)
 
 function mail.hud_update(playername, messages)
 	local data = huddata[playername]
-	local player = minetest.get_player_by_name(playername)
+	local player = core.get_player_by_name(playername)
 
 	if not data or not player then
 		return
@@ -48,7 +48,7 @@ function mail.hud_update(playername, messages)
 		end
 	end
 
-	if unreadcount == 0 then
+	if unreadcount == 0 or (not mail.get_setting(playername, "hud_notifications")) then
 		player:hud_change(data.imageid, "text", "")
 		player:hud_change(data.textid, "text", "")
 	else

init.lua

@@ -3,7 +3,10 @@ mail = {
 	version = 3,
 
 	-- mod storage
-	storage = minetest.get_mod_storage(),
+	storage = core.get_mod_storage(),
+
+	-- translation
+	S = core.get_translator(core.get_current_modname()),
 
 	-- ui theme prepend
 	theme = "",
@@ -14,8 +17,10 @@ mail = {
 	-- per-user ephemeral data
 	selected_idxs = {
 		inbox = {},
-		sent = {},
+		outbox = {},
 		drafts = {},
+		trash = {},
+		message = {},
 		contacts = {},
 		maillists = {},
 		to = {},
@@ -25,20 +30,22 @@ mail = {
 		sortfield = {},
 		sortdirection = {},
 		filter = {},
-		multipleselection = {}
+		multipleselection = {},
+		optionstab = {},
+		settings_group = {},
+		contributor_grouping = {},
 	},
 
 	message_drafts = {}
 }
 
-if minetest.get_modpath("default") then
+if core.get_modpath("default") then
 	mail.theme = default.gui_bg .. default.gui_bg_img
 end
 
 -- sub files
-local MP = minetest.get_modpath(minetest.get_current_modname())
-dofile(MP .. "/util/normalize.lua")
-dofile(MP .. "/util/uuid.lua")
+local MP = core.get_modpath(core.get_current_modname())
+dofile(MP .. "/util/init.lua")
 dofile(MP .. "/chatcommands.lua")
 dofile(MP .. "/migrate.lua")
 dofile(MP .. "/hud.lua")
@@ -46,24 +53,14 @@ dofile(MP .. "/storage.lua")
 dofile(MP .. "/api.lua")
 dofile(MP .. "/gui.lua")
 dofile(MP .. "/onjoin.lua")
-dofile(MP .. "/ui/mail.lua")
-dofile(MP .. "/ui/inbox.lua")
-dofile(MP .. "/ui/outbox.lua")
-dofile(MP .. "/ui/drafts.lua")
-dofile(MP .. "/ui/message.lua")
-dofile(MP .. "/ui/events.lua")
-dofile(MP .. "/ui/contacts.lua")
-dofile(MP .. "/ui/edit_contact.lua")
-dofile(MP .. "/ui/select_contact.lua")
-dofile(MP .. "/ui/maillists.lua")
-dofile(MP .. "/ui/edit_maillists.lua")
-dofile(MP .. "/ui/compose.lua")
-dofile(MP .. "/ui/about.lua")
+dofile(MP .. "/player_recipients.lua")
+-- sub directories
+dofile(MP .. "/ui/init.lua")
 
 -- migrate storage
 mail.migrate()
 
-if minetest.get_modpath("mtt") then
+if core.get_modpath("mtt") then
 	dofile(MP .. "/mtt.lua")
 	dofile(MP .. "/api.spec.lua")
 	dofile(MP .. "/migrate.spec.lua")

locale/mail.de.tr

@@ -1,55 +1,123 @@
 # textdomain: mail
+The mail could not be sent:=Die Mail konnte nicht gesendet werden:
+You did not specify any valid recipient.=Sie haben keinen gültigen Empfänger angegeben.
+You have mail! Type /mail to read=Sie haben Post! „/mail“ zum Lesen eingeben
+You have a new message from @1! Subject: @2=Sie haben eine neue Nachricht von @1! Betreff: @2
+To view it, type /mail=Geben Sie zum Anzeigen „/mail“ ein
+You could also use the button in your inventory.=Sie können auch die Schaltfläche in Ihrem Inventar verwenden.
+Original author=Ursprünglicher Autor
+Code=Code
+Internationalization=Internationalisierung
+Textures=Texturen
+Audio=Audio
+Provided by mt-mods=Bereitgestellt von mt-mods
+Version: @1=Version: @1
+Licenses=Lizenzen
+Expat (code), WTFPL (textures)=Expat (Code), WTFPL (Texturen)
+Communication using this system is NOT guaranteed to be private!=Die Kommunikation über dieses System ist NICHT garantiert privat!
+Admins are able to view the messages of any player.=Admins können die Nachrichten aller Spielenden sehen.
+Contributors=Mitwirkende
+Group by name=Nach Name gruppieren
+Group by contribution=Nach Beitrag gruppieren
+Note=Anmerkung
+Settings=Einstellungen
+About=Über
 BCC=BCC
 Cancel=Abbrechen
-Save draft=Entwurf Speichern
+Save draft=Entwurf speichern
 Send=Senden
+Subject=Betreff
+To=An
+CC=CC
 Delete=Löschen
 New=Neu
-No drafts=Keine Entwürfe
 Edit=Bearbeiten
-Subject=Betreff
-Player name=Spielername
-your contacts.=ihre Kontakte.
-The contact=Der Kontakt
-Save=Speichern
-That name=Der Name
-is already in=ist bereits in
-name cannot=Name kann nicht
-be empty.=leer sein.
 Back=Zurück
-Note=Notiz
-Maillist name=Verteilerlistenname
-Desc=Beschreibung
-Players=Spieler
-your maillists.=ihre Verteilerlisten.
-The maillist=Die Verteilerliste
-Mark Read=Als gelesen makieren
-Mark Unread=Als ungelesen makieren
-From=Von
-(No description)=(Keine Beschreibung)
-No maillist=Keine Verteilerliste
-CC=CC
-Read=Lesen
-Ascending=
-Descending=
-Filter=
-Allow multiple selection=
-selected=
-(Un)select all=
-No mail=Keine Nachrichten
+Name=Name
+No drafts=Keine Entwürfe
+Trash=Papierkorb
 Inbox=Posteingang
-Sent messages=Nachrichten senden
+Outbox=Gesendet
 Drafts=Entwürfe
 Contacts=Kontakte
 Mail lists=Verteilerlisten
-About=Über
+Options=Einstellungen
 Close=Schließen
 (No subject)=(Kein Betreff)
-Date=Datum
+Player name=Spielername
+That name is already in your contacts=Dieser Name ist bereits in Ihren Kontakten
+The contact name cannot be empty.=Der Kontaktname kann nicht leer sein.
+Save=Speichern
+Maillist name=Verteilerlistenname
+Desc=Beschreibung
+Players=Spieler
+That name is already in your mailing lists.=Dieser Name ist bereits in Ihren Verteilerlisten.
+The mailing list name cannot be empty.=Der Verteilerlistenname kann nicht leer sein.
+Mark Read=Als gelesen makieren
+Mark Unread=Als ungelesen makieren
+Mark Spam=Als Spam markieren
+Unmark Spam=Kein Spam
 Reply=Antworten
 Reply all=Allen antworten
-Forward=Weiter
+Forward=Weiterleiten
+Reply only to the sender=Nur dem Absender antworten
+Reply to all involved people=Allen beteiligten Personen antworten
+Transfer message to other people=Nachricht an andere Personen weiterleiten
+Date=Datum
+From=Von
+Filter=Filter
+Allow multiple selection=Mehrfachauswahl zulassen
+@1 of @2 selected=@1 von @2 ausgewählt
+(Un)select all=Alle aus-/abwählen
+No mail=Keine Nachrichten
+Read=Lesen
+Ascending=Aufsteigend
+Descending=Absteigend
+(No description)=(Keine Beschreibung)
+No maillist=Keine Verteilerliste
+Receivers=Empfänger
+(Un)mute sender=Absender stummschalten/entstummen
 Add=Hinzufügen
 Remove=Entfernen
-Name=Name
-To=An
+Reset=Zurücksetzen
+Restore=Wiederherstellen
+Empty=Leer
+Trash is empty=Papierkorb ist leer
+From/To=Von/An
+No contacts=Keine Kontakte
+The method of delivery to @1 is invalid.=Die Zustellmethode an @1 ist ungültig.
+The recipient @1 could not be identified.=Der Empfänger @1 konnte nicht identifiziert werden.
+@1 rejected your mail.=@1 hat Ihre Mail abgewiesen.
+Chat notifications=Chat-Benachrichtigungen
+Receive a message in the chat when there is a new message=Eine Nachricht im Chat erhalten, wenn es eine neue Mail gibt
+On join notifications=Login-Benachrichtigungen
+Receive a message at login when inbox isn't empty=Bei der Anmeldung eine Nachricht erhalten, wenn der Posteingang nicht leer ist
+HUD notifications=HUD-Benachrichtigungen
+Show an HUD notification when inbox isn't empty=Eine HUD-Benachrichtigung anzeigen, wenn der Posteingang nicht leer ist
+Sound notifications=Klang-Benachrichtigungen
+Play a sound when there is a new message=Einen Ton abspielen, wenn eine neue Mail eingeht
+Show unread in different color=Ungelesenes in anderer Farbe anzeigen
+Show CC/BCC in different color=CC/BCC in anderer Farbe anzeigen
+Default sorting field=Standardsortierfeld
+Default sorting direction=Standardmäßige Sortierrichtung
+Move deleted messages to trash=Gelöschte Nachrichten in den Papierkorb verschieben
+Automatic marking read=Automatisch als gelesen markieren
+Mark a message as read when opened=Nachrichten beim Öffnen als gelesen markieren
+Date format=Datumsformat
+Timezone offset=Zeitverschiebung
+Offset to add to server time.=Verschiebung, die zur Serverzeit addiert wird.
+Mute list=Stummgeschaltet-Liste
+Notifications=Benachrichtigungen
+Message list=Nachrichtenliste
+Fields=Felder
+Spam=Spam
+Other=Anderes
+Date and Time=Datum und Uhrzeit
+years=Jahren
+months=Monaten
+weeks=Wochen
+days=Tagen
+hours=Stunden
+minuts=Minuten
+seconds=Sekunden
+@1 ago=Vor @1

locale/mail.es.tr

@@ -0,0 +1,128 @@
+# textdomain: mail
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=¡Tienes correo! Escribe /mail para leerlo
+You have a new message from @1! Subject: @2=¡Tienes un nuevo mensaje de @1! Asunto: @2
+To view it, type /mail=Para verlo, escribe /mail
+You could also use the button in your inventory.=También puedes usar el botón de tu inventario.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=Proporcionado por mt-mods
+Version: @1=
+Licenses=Licencias
+Expat (code), WTFPL (textures)=Expat (código), WTFPL (texturas)
+Communication using this system is NOT guaranteed to be private!=¡NO se garantiza que la comunicación mediante este sistema sea privada!
+Admins are able to view the messages of any player.=Los administradores pueden ver los mensajes de cualquier jugador.
+Contributors=Colaboradores
+Group by name=
+Group by contribution=
+Note=Nota
+Settings=Ajustes
+About=Acerca de
+BCC=CCO
+Cancel=Cancelar
+Save draft=Guardar borrador
+Send=Enviar
+Subject=Asunto
+To=Para
+CC=CC
+Delete=Borrar
+New=Nuevo
+Edit=Editar
+Back=Volver
+Name=Nombre
+No drafts=No hay borradores
+Trash=Papelera
+Inbox=Entrada
+Outbox=Enviados
+Drafts=Borradores
+Contacts=Contactos
+Mail lists=Listas de correo
+Options=Opciones
+Close=Cerrar
+(No subject)=(Sin asunto)
+Player name=Nombre del jugador
+That name is already in your contacts=Ese nombre ya está en tus contactos
+The contact name cannot be empty.=El nombre de contacto no puede estar vacío.
+Save=Guardar
+Maillist name=Nombre de la lista de correo
+Desc=Desc
+Players=Jugadores
+That name is already in your mailing lists.=Ese nombre ya está en tus listas de correo.
+The mailing list name cannot be empty.=El nombre de lista de correo no puede estar vacío.
+Mark Read=Marcar como leído
+Mark Unread=Marcar como no leído
+Mark Spam=
+Unmark Spam=
+Reply=Responder
+Reply all=Responder a todos
+Forward=Reenviar
+Reply only to the sender=Responder solo al remitente
+Reply to all involved people=Responder a todas las personas implicadas
+Transfer message to other people=Transferir el mensaje a otras personas
+Date=Fecha
+From=De
+Filter=Filtro
+Allow multiple selection=Permitir selección múltiple
+@1 of @2 selected=@1 de @2 seleccionado(s)
+(Un)select all=(Des)seleccionar todos
+No mail=Sin correo
+Read=Leer
+Ascending=Ascendente
+Descending=Descendente
+(No description)=(Sin descripción)
+No maillist=Sin lista de correo
+Receivers=Recipientes
+(Un)mute sender=
+Add=Añadir
+Remove=Quitar
+Reset=Restablecer
+Restore=Restaurar
+Empty=Vacío
+Trash is empty=La papelera está vacía
+From/To=De/Para
+No contacts=Sin contactos
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Notificaciones de chat
+Receive a message in the chat when there is a new message=Recibir un mensaje en el chat cuando hay correo nuevo
+On join notifications=Notificaciones al unirse
+Receive a message at login when inbox isn't empty=Recibir mensaje al conectarse si la bandeja de entrada no está vacía
+HUD notifications=Notificaciones de interfaz
+Show an HUD notification when inbox isn't empty=Mostrar una notificación en la interfaz cuando la bandeja de entrada no está vacía
+Sound notifications=Notificaciones de sonido
+Play a sound when there is a new message=Emitir un sonido cuando hay un correo nuevo
+Show unread in different color=Mostrar no-leídos en diferente color
+Show CC/BCC in different color=Mostrar CC/CCO en diferente color
+Default sorting field=Campo a ordenar por defecto
+Default sorting direction=
+Move deleted messages to trash=Mover mensajes borrados a la papelera
+Automatic marking read=Marcar como leído automáticamente
+Mark a message as read when opened=Marcar un mensaje como leído al abrirlo
+Date format=Formato de fecha
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Notificaciones
+Message list=Lista de mensajes
+Fields=
+Spam=
+Other=Otros
+Date and Time=
+years=años
+months=meses
+weeks=semanas
+days=días
+hours=horas
+minuts=minutos
+seconds=segundos
+@1 ago=hace @1
+
+
+##### not used anymore #####
+
+Version=Versión

locale/mail.fr.tr

@@ -1,55 +1,123 @@
 # textdomain: mail
+The mail could not be sent:=Le mail ne peut pas être envoyé :
+You did not specify any valid recipient.=Vous n'avez pas spécifié de destinataire valide.
+You have mail! Type /mail to read=Vous avez reçu un mail ! Entrez /mail pour le consulter
+You have a new message from @1! Subject: @2=Vous avez un nouveau message de @1 ! Objet : @2
+To view it, type /mail=Pour le consulter, entrez /mail
+You could also use the button in your inventory.=Vous pouvez également utiliser le bouton dans votre inventaire
+Original author=Auteur original
+Code=Code
+Internationalization=Traduction
+Textures=Textures
+Audio=Audio
+Provided by mt-mods=Fourni par mt-mods
+Version: @1=Version : @1
+Licenses=Licences
+Expat (code), WTFPL (textures)=Expat (code), WTFPL (textures)
+Communication using this system is NOT guaranteed to be private!=La communication par ce système n'est pas garantie d'être privée !
+Admins are able to view the messages of any player.=Les administrateurs peuvent voir les messages de chaque joueur.
+Contributors=Contributeurs
+Group by name=Grouper par nom
+Group by contribution=Grouper par contribution
+Note=Note
+Settings=Paramètres
+About=À propos
 BCC=Cci
 Cancel=Annuler
 Save draft=Enregistrer le brouillon
 Send=Envoyer
+Subject=Objet
+To=À
+CC=Cc
 Delete=Supprimer
 New=Nouveau
-No drafts=Pas de brouillons
 Edit=Modifier
-Subject=Objet
-Player name=Nom du joueur
-your contacts.=vos contacts.
-The contact=Ce contact
-Save=Sauvegarder
-That name=Ce nom
-is already in=existe déjà
-name cannot=nom ne peut pas
-be empty.=être vide.
 Back=Retour
-Note=Note
-Maillist name=Nom de la liste de diffusion
-Desc=Desc
-Players=Joueurs
-your maillists.=vos listes de diffusion.
-The maillist=Cette liste de diffusion
-Mark Read=Marquer comme lu
-Mark Unread=Marquer non lu
-From=De
-(No description)=Sans description
-No maillist=Aucune liste de diffusion
-CC=Cc
-Read=Lire
-Ascending=Croissant
-Descending=Décroissant
-Filter=Filtre
-Allow multiple selection=Autoriser la sélection multiple
-selected=sélectionnés
-(Un)select all=Tout (dé)selectionner
-No mail=Aucun mail
+Name=Nom
+No drafts=Aucun brouillon
+Trash=Corbeille
 Inbox=Boîte de réception
-Sent messages=Messages envoyés
+Outbox=Envoyés
 Drafts=Brouillons
 Contacts=Contacts
 Mail lists=Listes de diffusion
-About=À propos
+Options=Options
 Close=Fermer
 (No subject)=(Sans objet)
-Date=Date
+Player name=Nom du joueur
+That name is already in your contacts=Ce nom est déjà dans vos contacts
+The contact name cannot be empty.=Le nom du contact ne peut pas être vide.
+Save=Sauvegarder
+Maillist name=Nom de la liste de diffusion
+Desc=Desc
+Players=Joueurs
+That name is already in your mailing lists.=Ce nom est déjà présent dans vos listes de diffusion.
+The mailing list name cannot be empty.=Le nom de la liste de diffusion ne peut pas être vide.
+Mark Read=Marquer comme lu
+Mark Unread=Marquer non lu
+Mark Spam=Marquer comme spam
+Unmark Spam=Marquer non-spam
 Reply=Répondre
 Reply all=Répondre à tous
 Forward=Transférer
+Reply only to the sender=Répondre uniquement à l'expéditeur
+Reply to all involved people=Répondre à toutes les personnes concernées
+Transfer message to other people=Transférer le message à d'autres personnes
+Date=Date
+From=De
+Filter=Filtre
+Allow multiple selection=Autoriser la sélection multiple
+@1 of @2 selected=@1 sur @2 sélectionnés
+(Un)select all=Tout (dé)sélectionner
+No mail=Aucun mail
+Read=Lire
+Ascending=Croissant
+Descending=Décroissant
+(No description)=(Sans description)
+No maillist=Aucune liste de diffusion
+Receivers=Destinataires
+(Un)mute sender=(Dé)mettre en sourdine
 Add=Ajouter
 Remove=Enlever
-Name=Nom
-To=À
+Reset=Réinitialiser
+Restore=Restaurer
+Empty=Vider
+Trash is empty=La corbeille est vide
+From/To=De/À
+No contacts=Aucun contact
+The method of delivery to @1 is invalid.=La méthode d'expédition à @1 est invalide.
+The recipient @1 could not be identified.=Le destinataire @1 n'a pas pu être identifié.
+@1 rejected your mail.=@1 a rejeté votre mail.
+Chat notifications=Notifications dans le tchat
+Receive a message in the chat when there is a new message=Recevoir un message dans le tchat lorsqu'un nouveau message est reçu
+On join notifications=Notifications à la connexion
+Receive a message at login when inbox isn't empty=Recevoir un message à la connexion lorsque la boîte de réception n'est pas vide
+HUD notifications=Notifications ATH
+Show an HUD notification when inbox isn't empty=Indiquer dans l'ATH que la boîte de réception n'est pas vide
+Sound notifications=Notifications sonores
+Play a sound when there is a new message=Jouer un son lorsqu'un nouveau message est reçu
+Show unread in different color=Coloriser les non lus
+Show CC/BCC in different color=Coloriser les Cc/Cci
+Default sorting field=Champ de tri par défaut
+Default sorting direction=Direction de tri par défaut
+Move deleted messages to trash=Supprimer les messages dans la corbeille
+Automatic marking read=Lu automatique
+Mark a message as read when opened=Marquer un message comme lu lorsqu'il est ouvert
+Date format=Format de la date
+Timezone offset=Compensation horaire
+Offset to add to server time.=Écart de temps à ajouter à l'heure du serveur.
+Mute list=Liste de sourdine
+Notifications=Notifications
+Message list=Liste de messages
+Fields=Champs
+Spam=Spam
+Other=Autre
+Date and Time=Date et Heure
+years=années
+months=mois
+weeks=semaines
+days=jours
+hours=heures
+minuts=minutes
+seconds=secondes
+@1 ago=Il y a @1

locale/mail.hu.tr

@@ -0,0 +1,128 @@
+# textdomain: mail
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=Van egy leveled! Írd /mail az olvasáshoz
+You have a new message from @1! Subject: @2=Van egy új üzeneted @1-től Cím: @2
+To view it, type /mail=Ahhoz hogy megnézd, írd /mail
+You could also use the button in your inventory.=A gombot is tudod használni az inventoridban.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=Feltéve, hogy az én mt-mod-om
+Version: @1=
+Licenses=License
+Expat (code), WTFPL (textures)=Expat (kód), WTFPL (textúrák)
+Communication using this system is NOT guaranteed to be private!=A systemben lévő komunikáció nem garantáltan privát!
+Admins are able to view the messages of any player.=Az adminok megtudják nézni minden játékos üzenetjét.
+Contributors=Közreműködöttek
+Group by name=
+Group by contribution=
+Note=Jegyzet
+Settings=Beállítások
+About=Róla
+BCC=BCC
+Cancel=Mégse
+Save draft=mentés piszkozatként
+Send=Küldés
+Subject=Cím
+To=Neki
+CC=CC
+Delete=Törlés
+New=Új
+Edit=Szerkesztés
+Back=Visza
+Name=Név
+No drafts=Nincsenek piszkozatok
+Trash=
+Inbox=PostaLáda
+Outbox=Elküldött
+Drafts=Piszkozatok
+Contacts=Contaktok
+Mail lists=Levelező lista
+Options=Lehetőségek
+Close=Bezár
+(No subject)=(nincs cím)
+Player name=Játékos neve
+That name is already in your contacts=A név már a kontaktok között van
+The contact name cannot be empty.=A contakt neve nem lehet üres.
+Save=Mentés
+Maillist name=Levelező lista neve
+Desc=Desc
+Players=Játékosok
+That name is already in your mailing lists.=A név már benne van a levelező listában
+The mailing list name cannot be empty.=A levelező lista neve nem lehet üres
+Mark Read=Jelöld olvasottként
+Mark Unread=Jelöld olvasatlanul
+Mark Spam=
+Unmark Spam=
+Reply=Válasz
+Reply all=Válaszmindenkinek
+Forward=Továbbítás
+Reply only to the sender=
+Reply to all involved people=
+Transfer message to other people=
+Date=Dátum
+From=Tőle
+Filter=Filterek
+Allow multiple selection=
+@1 of @2 selected=
+(Un)select all=(ne válaszd ki) mindegyik választása
+No mail=Nincs levél
+Read=Olvasott
+Ascending=Emelkedő
+Descending=Sűlyedő
+(No description)=(Nincs leírás)
+No maillist=Nincs levelező lista
+Receivers=
+(Un)mute sender=
+Add=Hozzáadás
+Remove=Elvétel
+Reset=Viszaállítás
+Restore=
+Empty=
+Trash is empty=
+From/To=Tól(től)/neki
+No contacts=
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Chates értesítések
+Receive a message in the chat when there is a new message=
+On join notifications=Belépési értesírés
+Receive a message at login when inbox isn't empty=
+HUD notifications= HUD értesítés
+Show an HUD notification when inbox isn't empty=
+Sound notifications=Hang értesítés
+Play a sound when there is a new message=
+Show unread in different color=Mutasd a nem olvasottakat más színnel
+Show CC/BCC in different color=Mutasd a CC-t/BCC-t más színnel
+Default sorting field=Alap válogató terület
+Default sorting direction=
+Move deleted messages to trash=
+Automatic marking read=
+Mark a message as read when opened=
+Date format=
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Értesítések
+Message list=Üzenetek listája
+Fields=
+Spam=
+Other=
+Date and Time=
+years=
+months=
+weeks=
+days=
+hours=
+minuts=
+seconds=
+@1 ago=
+
+
+##### not used anymore #####
+
+Version=Verzió

locale/mail.id.tr

@@ -0,0 +1,128 @@
+# textdomain: mail
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=Anda memiliki surel! ketik /mail untuk membaca
+You have a new message from @1! Subject: @2=Anda memiliki pesan baru dari @1! Subjek: @2
+To view it, type /mail=Untuk melihatnya, ketik /mail
+You could also use the button in your inventory.=Anda juga dapat menggunakan tombol dalam inventaris Anda.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=Disediakan oleh mt-mods
+Version: @1=
+Licenses=Lisensi
+Expat (code), WTFPL (textures)=Expat (kode), WTFPL (tekstur)
+Communication using this system is NOT guaranteed to be private!=Komunikasi dengan sistem ini TIDAK dijamin bersifat pribadi!
+Admins are able to view the messages of any player.=Admin dapat melihat pesan dari setiap pemain.
+Contributors=Kontributor
+Group by name=
+Group by contribution=
+Note=Catatan
+Settings=Pengaturan
+About=Tentang
+BCC=BCC
+Cancel=Batal
+Save draft=Simpan Draf
+Send=Kirim
+Subject=Subjek
+To=Kpd
+CC=CC
+Delete=Hapus
+New=Baru
+Edit=Sunting
+Back=Kembali
+Name=Nama
+No drafts=Tidak ada draf
+Trash=Sampah
+Inbox=Kotak Masuk
+Outbox=Kotak Keluar
+Drafts=Draf
+Contacts=Kontak
+Mail lists=Milis
+Options=Pengaturan
+Close=Tutup
+(No subject)=(Tanpa subjek)
+Player name=Nama pemain
+That name is already in your contacts=Nama itu sudah ada dalam kontak Anda
+The contact name cannot be empty.=Nama kontak tidak boleh kosong.
+Save=Simpan
+Maillist name=Nama milis
+Desc=Deskripsi
+Players=Pemain
+That name is already in your mailing lists.=Nama tersebut sudah ada dalam milis Anda.
+The mailing list name cannot be empty.=Nama milis tidak boleh kosong.
+Mark Read=Tndai Sdh Dibaca
+Mark Unread=Tndai Blm Dibaca
+Mark Spam=
+Unmark Spam=
+Reply=Balas
+Reply all=Balas Semua
+Forward=Teruskan
+Reply only to the sender=Balas hanya kepada pengirim
+Reply to all involved people=Balas kepada semua orang yang terlibat
+Transfer message to other people=Teruskan pesan kepada orang lain
+Date=Tanggal
+From=Dari
+Filter=Saring
+Allow multiple selection=Izinkan beberapa pilihan
+@1 of @2 selected=@1 dari @2 dipilih
+(Un)select all=Batal/Pilih Semua
+No mail=Tidak ada surat
+Read=Baca
+Ascending=Menaik
+Descending=Menurun
+(No description)=(Tidak ada deskripsi)
+No maillist=Tidak ada milis
+Receivers=Penerima
+(Un)mute sender=
+Add=Tambah
+Remove=Hapus
+Reset=Atur Ulang
+Restore=Kembalikan
+Empty=Kosong
+Trash is empty=Sampah kosong
+From/To=Dari/Kpd
+No contacts=Tidak ada kontak
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Pemberitahuan obrolan
+Receive a message in the chat when there is a new message=Terima pesan dalam obrolan ketika ada pesan baru
+On join notifications=Pemberitahuan saat bergabung
+Receive a message at login when inbox isn't empty=Terima pesan saat masuk log ketika kotak masuk tidak kosong
+HUD notifications=Pemberitahuan HUD
+Show an HUD notification when inbox isn't empty=Tampilkan pemberitahuan HUD saat kotak masuk tidak kosong
+Sound notifications=Pemberitahuan suara
+Play a sound when there is a new message=Putar suara saat ada pesan baru
+Show unread in different color=Tampilkan belum dibaca dengan warna berbeda
+Show CC/BCC in different color=Tampilkan CC/BCC dengan warna berbeda
+Default sorting field=Kolom pengurutan bawaan
+Default sorting direction=Arah pengurutan bawaan
+Move deleted messages to trash=Pindahkan pesan yang dihapus ke sampah
+Automatic marking read=Penandaan otomatis sudah dibaca
+Mark a message as read when opened=Tandai pesan sebagai sudah dibaca saat dibuka
+Date format=Format tanggal
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Pemberitahuan
+Message list=Daftar Pesan
+Fields=
+Spam=
+Other=Lain-Lain
+Date and Time=
+years=tahun
+months=bulan
+weeks=pekan
+days=hari
+hours=jam
+minuts=menit
+seconds=detik
+@1 ago=@1 yang lalu
+
+
+##### not used anymore #####
+
+Version=Versi

locale/mail.pt_BR.tr

@@ -0,0 +1,123 @@
+# textdomain: mail
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=Você recebeu e-mail! Tecle /mail para ler
+You have a new message from @1! Subject: @2=Você tem uma mensagem de @1! Assunto: @2
+To view it, type /mail=Para visualizar a mensagem, digite /mail
+You could also use the button in your inventory.=Você também pode usar o botão do seu inventário.
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=
+Version: @1=
+Licenses=
+Expat (code), WTFPL (textures)=
+Communication using this system is NOT guaranteed to be private!=A comunicação usando este sistema não possui garantia de privacidade
+Admins are able to view the messages of any player.=Administradores poderão ler as mensagens de qualquer jogador
+Contributors=
+Group by name=
+Group by contribution=
+Note=Nota
+Settings=Ajustes
+About=Sobre
+BCC=BCC
+Cancel=Cancelar
+Save draft=Salvar rascunho
+Send=Enviar
+Subject=Assunto
+To=Para
+CC=CC
+Delete=Apagar
+New=Novo
+Edit=Editar
+Back=Voltar
+Name=Nome
+No drafts=Sem rascunhos
+Trash=
+Inbox=Entrada
+Outbox=Enviadas
+Drafts=Rascunhos
+Contacts=Contatos
+Mail lists=Lista de correios
+Options=Opções
+Close=Fechar
+(No subject)=(Sem assunto)
+Player name=Nome do jogador
+That name is already in your contacts=Esse nome já consta em sua lista de contatos
+The contact name cannot be empty.=Informe o nome do destinatário
+Save=Salvar
+Maillist name=Nome da lista de discussão
+Desc=Descrição
+Players=Jogador
+That name is already in your mailing lists.=Esse nome ja está sendo usado em sua lista de discussões
+The mailing list name cannot be empty.=O nome da lista de discussões deve ser informado
+Mark Read=Marcar como lido
+Mark Unread=Marcar como não lido
+Mark Spam=
+Unmark Spam=
+Reply=Responder
+Reply all=Responder Todos
+Forward=Encaminhar
+Reply only to the sender=
+Reply to all involved people=
+Transfer message to other people=
+Date=Data
+From=De
+Filter=Filtrar
+Allow multiple selection=Permitir selecionar vários
+@1 of @2 selected=
+(Un)select all=Desmarcar todos
+No mail=Sem e-mails no momento
+Read=Ler
+Ascending=Ascendente
+Descending=Descendente
+(No description)=(sem descrição)
+No maillist=Sem lista de discussão
+Receivers=
+(Un)mute sender=
+Add=Adicionar
+Remove=Remover
+Reset=
+Restore=
+Empty=
+Trash is empty=
+From/To=De/Para
+No contacts=
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=Notificação de conversa
+Receive a message in the chat when there is a new message=
+On join notifications=Notificação ao entrar
+Receive a message at login when inbox isn't empty=
+HUD notifications=Notificação no HUD
+Show an HUD notification when inbox isn't empty=
+Sound notifications=
+Play a sound when there is a new message=
+Show unread in different color=Exibir mensagens não lidas em uma cor diferente
+Show CC/BCC in different color=Exibir mensagens com copia em uma cor diferente
+Default sorting field=Ordenamento de campo padrão
+Default sorting direction=
+Move deleted messages to trash=
+Automatic marking read=
+Mark a message as read when opened=
+Date format=
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=Notificações
+Message list=Lista de mensagens
+Fields=
+Spam=
+Other=
+Date and Time=
+years=
+months=
+weeks=
+days=
+hours=
+minuts=
+seconds=
+@1 ago=

locale/mail.ru.tr

@@ -0,0 +1,123 @@
+# textdomain: mail
+The mail could not be sent:=Невозможно отправить почту:
+You did not specify any valid recipient.=Вы не указали получателя.
+You have mail! Type /mail to read=У вас есть почта! Наберите /mail, чтобы прочитать
+You have a new message from @1! Subject: @2=У вас новое сообщение от @1! Тема: @2
+To view it, type /mail=Чтобы посмотреть, наберите /mail
+You could also use the button in your inventory.=Вы также можете использовать кнопку в Вашем инвентаре.
+Original author=Автор оригинала
+Code=Код
+Internationalization=Перевод
+Textures=Текстуры
+Audio=Аудио
+Provided by mt-mods=Предоставлено mt-mods
+Version: @1=Версия: @1
+Licenses=Лицензии
+Expat (code), WTFPL (textures)=Expat (код), WTFPL (текстуры)
+Communication using this system is NOT guaranteed to be private!=Конфиденциальность общения с использованием этой системы НЕ гарантируется!
+Admins are able to view the messages of any player.=Админ может читать сообщения любых игроков.
+Contributors=Участники
+Group by name=Группировать по имени
+Group by contribution=Группировать по участию
+Note=Заметка
+Settings=Настройки
+About=О...
+BCC=С.копия
+Cancel=Отмена
+Save draft=Сохр. черновик
+Send=Отправить
+Subject=Тема
+To=Кому
+CC=Копия
+Delete=Удалить
+New=Новое
+Edit=Изменить
+Back=Назад
+Name=Имя
+No drafts=Нет черновиков
+Trash=Корзина
+Inbox=Входящие
+Outbox=Исходящие
+Drafts=Черновики
+Contacts=Контакты
+Mail lists=Списки рассылки
+Options=Опции
+Close=Закрыть
+(No subject)=(без темы)
+Player name=Имя игрока
+That name is already in your contacts=Это имя уже есть в Ваших контактах
+The contact name cannot be empty.=Имя контакта не может быть пустым.
+Save=Сохранить
+Maillist name=Название списка
+Desc=Описание
+Players=Игроки
+That name is already in your mailing lists.=Это имя уже есть в ваших списках рассылки.
+The mailing list name cannot be empty.=Название списка не может быть пустым.
+Mark Read=Отм. прочитано
+Mark Unread=Отм. непрочитано
+Mark Spam=Отм. спам
+Unmark Spam=Снять отм. спам
+Reply=Ответить
+Reply all=Ответить всем
+Forward=Переслать
+Reply only to the sender=Ответить только отправителю
+Reply to all involved people=Ответить всем участникам
+Transfer message to other people=Переслать сообщение другим игрокам
+Date=Дата
+From=От
+Filter=Фильтр
+Allow multiple selection=Разрешить выбор нескольких
+@1 of @2 selected=@1 из @2 выбраны
+(Un)select all=Снять выбор со всех
+No mail=Нет почты
+Read=Прочитано
+Ascending=Возрастание
+Descending=Убывание
+(No description)=(Нет описания)
+No maillist=Не список рассылки
+Receivers=Получатели
+(Un)mute sender=Вкл. звук для отправителя
+Add=Добавить
+Remove=Удалить
+Reset=Сбросить
+Restore=Восстановить
+Empty=Очистить
+Trash is empty=Корзина пуста
+From/To=От/Кому
+No contacts=Нет контактов
+The method of delivery to @1 is invalid.=Метод доставки для @1 не действителен.
+The recipient @1 could not be identified.=Невозможно идентифицировать получателя @1.
+@1 rejected your mail.=@1 отклонил ваше письмо.
+Chat notifications=Уведомления в чате
+Receive a message in the chat when there is a new message=Получать сообщение в чате, когда приходит новое сообщение
+On join notifications=Уведомления при присоединении
+Receive a message at login when inbox isn't empty=Получать сообщение при входе, когда есть письма во Входящих
+HUD notifications=HUD уведомления
+Show an HUD notification when inbox isn't empty=Показывать уведомление HUD, если папка «Входящие» не пуста
+Sound notifications=Звуковые уведомления
+Play a sound when there is a new message=Проигрывать звук, когда приходит новое сообщение
+Show unread in different color=Показывать не прочтенные други цветом
+Show CC/BCC in different color=Показывать Копию/Скрытую копию другим цветом
+Default sorting field=Поле для сортировки по умолчанию
+Default sorting direction=Направление сортировки по умолчанию
+Move deleted messages to trash=Перемещать удаленные сообщения в корзину
+Automatic marking read=Автоматически отмечать прочтение
+Mark a message as read when opened=Отмечать сообщение как прочитанное при открытии
+Date format=Формат даты
+Timezone offset=Временная зона
+Offset to add to server time.=Добавлять ко времени сервера
+Mute list=Заглушить список
+Notifications=Уведомления
+Message list=Список сообщений
+Fields=Поля
+Spam=Спам
+Other=Другое
+Date and Time=Дата и Время
+years=лет
+months=месяцев
+weeks=недель
+days=дней
+hours=часов
+minuts=минут
+seconds=секунд
+@1 ago=@1 назад

locale/mail.uk.tr

@@ -0,0 +1,123 @@
+# textdomain: mail
+The mail could not be sent:=Неможливо відправити пошту:
+You did not specify any valid recipient.=Ви не вказали отримувача.
+You have mail! Type /mail to read=У вас є пошта! Введіть /mail для прочитання
+You have a new message from @1! Subject: @2=У вас нове повідомлення від @1! Тема: @2
+To view it, type /mail=Введіть /mail аби прочитати це
+You could also use the button in your inventory.=Також ви можете використовувати кнопку в вашому інвентарі.
+Original author=Автор оригіналу
+Code=Код
+Internationalization=Переклад
+Textures=Текстури
+Audio=Аудіо
+Provided by mt-mods=Надано mt-mods
+Version: @1=Версія: @1
+Licenses=Ліцензії
+Expat (code), WTFPL (textures)=Expat (код), WTFPL (текстури)
+Communication using this system is NOT guaranteed to be private!=Конфіденційність використання цієї системи НЕ гарантовано є приватною!
+Admins are able to view the messages of any player.=Адмін може читати повідомлення всіх гравців.
+Contributors=Учасники
+Group by name=Групувати по імені
+Group by contribution=Групувати по участю
+Note=Замітка
+Settings=Налаштування
+About=Про...
+BCC=ВСС
+Cancel=Скасувати
+Save draft=Збер.чернетку
+Send=Відправити
+Subject=Тема
+To=Кому
+CC=Копія
+Delete=Видалити
+New=Створити
+Edit=Редагувати
+Back=Назад
+Name=Ім'я
+No drafts=Немає чернеток
+Trash=Кошик
+Inbox=Вхідні
+Outbox=Вихідні
+Drafts=Чернетки
+Contacts=Контакти
+Mail lists=Списки розсилки
+Options=Опції
+Close=Закрити
+(No subject)=(без теми)
+Player name=Ім'я гравця
+That name is already in your contacts=Це ім'я вже збережено у ваших контактах
+The contact name cannot be empty.=Ім'я контакта не може бути пустим.
+Save=Зберегти
+Maillist name=Назва списку
+Desc=Опис
+Players=Гравці
+That name is already in your mailing lists.=Це ім'я вже є у ваших списках розсилки.
+The mailing list name cannot be empty.=Назва списка не може бути пустою.
+Mark Read=Прочитано
+Mark Unread=Непрочитано
+Mark Spam=Відм. спам
+Unmark Spam=Скас. спам
+Reply=Відповісти
+Reply all=Відповісти усім
+Forward=Переслати
+Reply only to the sender=Відповісти лише відправнику
+Reply to all involved people=Відповісти усім учасникам
+Transfer message to other people=Переслати це повідомлення іншим людям
+Date=Дата
+From=Від
+Filter=Фільтр
+Allow multiple selection=Дозволити вибір декількох
+@1 of @2 selected=@1 з @2 вибрані
+(Un)select all=Зняти вибір з усіх
+No mail=Немає пошти
+Read=Прочитано
+Ascending=Зростання
+Descending=Зменшення
+(No description)=(Немає опису)
+No maillist=Немає списків розсилки
+Receivers=Отримувачі
+(Un)mute sender=Увімк. звук для відправника
+Add=Додати
+Remove=Видалити
+Reset=Скинути
+Restore=Відновити
+Empty=Очистити
+Trash is empty=Кошик пустий
+From/To=Від/До
+No contacts=Немає контактів
+The method of delivery to @1 is invalid.=Метод доставки для @1 не дійсний.
+The recipient @1 could not be identified.=Не знайдено @1.
+@1 rejected your mail.=@1 відхилив ваше лист.
+Chat notifications=Повідомлення у чаті
+Receive a message in the chat when there is a new message=Отримувати повідомленння у чаті при отриманні нового повідомлення
+On join notifications=Повідомлення при приєднанні
+Receive a message at login when inbox isn't empty=Отримувати повідомлення при приєднанні коли у теці «Вхідні» є нові листи
+HUD notifications=HUD повідомлення
+Show an HUD notification when inbox isn't empty=Показувати HUD повідомлення коли у теці «Вхідні» є нові листи
+Sound notifications=Звукові повідомлення
+Play a sound when there is a new message=Програвати звук при новому повідомленні
+Show unread in different color=Показувати непрочитані іншим кольором
+Show CC/BCC in different color=Показувати копію/приховану копію іншим кольором
+Default sorting field=Поле для сортування за замовч.
+Default sorting direction=Напрям сортування за замовч.
+Move deleted messages to trash=Переміщати видалені повідомлення до кошика
+Automatic marking read=Автоматично відмічати прочитані
+Mark a message as read when opened=Відмічати повідомлення як прочитане, коли відкрито
+Date format=Формат дати
+Timezone offset=Часовий пояс
+Offset to add to server time.=Додавати до часу сервера.
+Mute list=Заглушити список
+Notifications=Повідомлення
+Message list=Список повідомлень
+Fields=Поля
+Spam=Спам
+Other=Інше
+Date and Time=Дата й час
+years=років
+months=місяців
+weeks=тижнів
+days=днів
+hours=годин
+minuts=хвилин
+seconds=секунд
+@1 ago=@1 тому

locale/mail.zh_CN.tr

@@ -0,0 +1,129 @@
+# textdomain: mail
+The mail could not be sent:=无法发送邮件：
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=您有新邮件，请使用 /mail 查看。
+You have a new message from @1! Subject: @2=您有一封来自 @1 的新邮件，主题为“@2”。
+To view it, type /mail=请使用 /mail 命令查看。
+You could also use the button in your inventory.=您也可以使用物品清单里的按键。
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=由 mt-mods 提供
+Version: @1=
+Licenses=许可证
+Expat (code), WTFPL (textures)=Expat（代码），WTFPL（材质）
+Communication using this system is NOT guaranteed to be private!=这个系统不适用于私密沟通！
+Admins are able to view the messages of any player.=管理员可以查看所有玩家的邮件。
+Contributors=贡献者
+Group by name=
+Group by contribution=
+Note=备注
+Settings=设置
+About=关于
+BCC=密送
+Cancel=取消
+Save draft=保存草稿
+Send=发送
+Subject=主题
+To=收件人
+CC=抄送
+Delete=删除
+New=新
+Edit=编辑
+Back=返回
+Name=名字
+#if new means new mail, it would be New=新邮件
+No drafts=没有草稿
+Trash=垃圾箱
+Inbox=收件箱
+Outbox=已发送
+Drafts=草稿
+Contacts=通讯录
+Mail lists=建组
+Options=选项
+Close=关闭
+(No subject)=（无主题）
+Player name=玩家名字
+That name is already in your contacts=这个玩家已经在您的通讯录里。
+The contact name cannot be empty.=联系人名字不能为空。
+Save=保存
+Maillist name=邮件列表名称
+Desc=描述
+Players=玩家
+That name is already in your mailing lists.=这个玩家已经在您的邮件列表里。
+The mailing list name cannot be empty.=邮件列表名称不能为空。
+Mark Read=标记为已读
+Mark Unread=标记为未读
+Mark Spam=标记为垃圾邮件
+Unmark Spam=取消标记为垃圾邮件
+Reply=回复
+Reply all=回复所有
+Forward=转发
+Reply only to the sender=只回复给发件人
+Reply to all involved people=回复给所有人
+Transfer message to other people=将邮件转发给其他人
+Date=时间
+From=发件人
+Filter=筛选
+Allow multiple selection=允许多选
+@1 of @2 selected=已选中 @2 项中的 @1 项
+(Un)select all=（取消）选中所有
+No mail=无邮件
+Read=浏览
+Ascending=升序
+Descending=降序
+(No description)=（无描述）
+No maillist=无邮件列表
+Receivers=收件人
+(Un)mute sender=屏蔽或取消屏蔽发件人
+Add=添加
+Remove=移除
+Reset=重置
+Restore=恢复
+Empty=空的
+Trash is empty=垃圾箱为空
+From/To=发件人或收件人
+No contacts=无联系人
+The method of delivery to @1 is invalid.=无法将邮件发送给 @1。
+The recipient @1 could not be identified.=无法找到收件人“@1”。
+@1 rejected your mail.=@1 不接收您的邮件。
+Chat notifications=在聊天记录中显示通知
+Receive a message in the chat when there is a new message=收到新邮件时在聊天记录中显示通知。
+On join notifications=加入服务器时显示通知
+Receive a message at login when inbox isn't empty=加入服务器且由新邮件时显示通知。
+HUD notifications=HUD 通知
+Show an HUD notification when inbox isn't empty=收到新邮件时通过 HUD 显示通知。
+Sound notifications=提示音
+Play a sound when there is a new message=收到新邮件时播放提示音
+Show unread in different color=使用不同的颜色标记未读邮件
+Show CC/BCC in different color=使用不同的颜色标记抄送和密送邮件
+Default sorting field=排序依据
+Default sorting direction=排序方向
+Move deleted messages to trash=将已删除的邮件移至垃圾箱
+Automatic marking read=自动将邮件标记为已读
+Mark a message as read when opened=打开邮件时自动将邮件标记为已读
+Date format=日期格式
+Timezone offset=
+Offset to add to server time.=
+Mute list=屏蔽列表
+Notifications=通知
+Message list=邮件列表
+Fields=
+Spam=垃圾邮件
+Other=其它
+Date and Time=
+years=年
+months=月
+weeks=周
+days=天
+hours=小时
+minuts=分钟
+seconds=秒
+@1 ago=@1前
+
+
+##### not used anymore #####
+
+Version=版本

locale/mail.zh_TW.tr

@@ -1,55 +1,128 @@
 # textdomain: mail
+The mail could not be sent:=無法發送郵件：
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=您有新郵件，請使用 /mail 查看。
+You have a new message from @1! Subject: @2=您有一封來自 @1 的新郵件，主題為“@2”。
+To view it, type /mail=請使用 /mail 指令查看。
+You could also use the button in your inventory.=您也可以使用物品欄裡的按鍵。
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=由 mt-mods 提供
+Version: @1=
+Licenses=許可證
+Expat (code), WTFPL (textures)=Expat（源碼），WTFPL（材質）
+Communication using this system is NOT guaranteed to be private!=此系統不適合私密交流！
+Admins are able to view the messages of any player.=管理員可以查看所有玩家的郵件。
+Contributors=貢獻者
+Group by name=
+Group by contribution=
+Note=備註
+Settings=設置
+About=關於
 BCC=密件副本
 Cancel=取消
 Save draft=儲存草稿
 Send=發送
+Subject=主旨
+To=收件人
+CC=副本
 Delete=刪除
 New=新建
-No drafts=沒有草稿
 Edit=編輯
-Subject=主旨
-Player name=玩家名稱
-your contacts.=
-The contact=
-Save=儲存
-That name=
-is already in=
-name cannot=
-be empty.=
 Back=返回
-Note=備註
-Maillist name=郵件列表名稱
-Desc=描述
-Players=玩家
-your maillists.=
-The maillist=
-Mark Read=標記已讀
-Mark Unread=標記未讀
-From=寄件者
-(No description)=（沒有描述）
-No maillist=沒有郵件列表
-CC=副本
-Read=閱讀
-Ascending=
-Descending=
-Filter=
-Allow multiple selection=
-selected=
-(Un)select all=
-No mail=沒有郵件
+Name=名稱
+No drafts=沒有草稿
+Trash=垃圾箱
 Inbox=收件箱
-Sent messages=寄件備份
+Outbox=寄件備份
 Drafts=草稿
 Contacts=聯繫人
 Mail lists=郵件列表
-About=關於
+Options=選項
 Close=關閉
 (No subject)=（沒有主旨）
-Date=日期
+Player name=玩家名稱
+That name is already in your contacts=玩家已經在您的通訊錄中。
+The contact name cannot be empty.=聯繫人名字不能為空。
+Save=儲存
+Maillist name=郵件列表名稱
+Desc=描述
+Players=玩家
+That name is already in your mailing lists.=玩家已經在您的郵件列表中。
+The mailing list name cannot be empty.=郵件列表名稱不能為空。
+Mark Read=標記已讀
+Mark Unread=標記未讀
+Mark Spam=標記垃圾郵件
+Unmark Spam=取消標記垃圾郵件
 Reply=回覆
 Reply all=回覆所有人
 Forward=轉寄
+Reply only to the sender=僅回覆給寄件人
+Reply to all involved people=回覆給所有人
+Transfer message to other people=將郵件轉發給所有人
+Date=日期
+From=寄件人
+Filter=篩選
+Allow multiple selection=允許多選
+@1 of @2 selected=已選擇 @2 項中的 @1 項。
+(Un)select all=（取消）選中所有
+No mail=沒有郵件
+Read=閱讀
+Ascending=
+Descending=
+(No description)=（沒有描述）
+No maillist=沒有郵件列表
+Receivers=收件人
+(Un)mute sender=（取消）屏蔽寄件人
 Add=加入
 Remove=移除
-Name=名稱
-To=收件人
+Reset=重置
+Restore=恢復
+Empty=空
+Trash is empty=垃圾箱為空
+From/To=寄件人或收件人
+No contacts=沒有聯繫人
+The method of delivery to @1 is invalid.=無法將郵件發送給 @1。
+The recipient @1 could not be identified.=無法找到收件人“@1”。
+@1 rejected your mail.=@1 不接收您的郵件
+Chat notifications=在聊天室中顯示通知
+Receive a message in the chat when there is a new message=收到新郵件時在聊天室中顯示通知。
+On join notifications=加入伺服器時顯示通知
+Receive a message at login when inbox isn't empty=加入伺服器且有新郵件時顯示通知。
+HUD notifications=HUD 通知
+Show an HUD notification when inbox isn't empty=收到新郵件時在 HUD 中顯示通知。
+Sound notifications=提示聲
+Play a sound when there is a new message=收到新郵件時播放提示聲
+Show unread in different color=使用不同的顏色標記未讀郵件
+Show CC/BCC in different color=使用不同的顏色標記副本和密件副本
+Default sorting field=排序方式
+Default sorting direction=排序順序
+Move deleted messages to trash=將已刪除的郵件移至垃圾箱
+Automatic marking read=自動將郵件標記已讀
+Mark a message as read when opened=打開郵件時自動將郵件標記已讀
+Date format=日期格式
+Timezone offset=
+Offset to add to server time.=
+Mute list=屏蔽列表
+Notifications=通知
+Message list=郵件列表
+Fields=
+Spam=垃圾郵件
+Other=其他
+Date and Time=
+years=年
+months=月
+weeks=周
+days=日
+hours=小時
+minuts=分鐘
+seconds=秒
+@1 ago=@1前
+
+
+##### not used anymore #####
+
+Version=版本

locale/template.txt

@@ -1,55 +1,123 @@
 # textdomain: mail
+The mail could not be sent:=
+You did not specify any valid recipient.=
+You have mail! Type /mail to read=
+You have a new message from @1! Subject: @2=
+To view it, type /mail=
+You could also use the button in your inventory.=
+Original author=
+Code=
+Internationalization=
+Textures=
+Audio=
+Provided by mt-mods=
+Version: @1=
+Licenses=
+Expat (code), WTFPL (textures)=
+Communication using this system is NOT guaranteed to be private!=
+Admins are able to view the messages of any player.=
+Contributors=
+Group by name=
+Group by contribution=
+Note=
+Settings=
+About=
 BCC=
 Cancel=
 Save draft=
 Send=
+Subject=
+To=
+CC=
 Delete=
 New=
-No drafts=
 Edit=
-Subject=
-Player name=
-your contacts.=
-The contact=
-Save=
-That name=
-is already in=
-name cannot=
-be empty.=
 Back=
-Note=
-Maillist name=
-Desc=
-Players=
-your maillists.=
-The maillist=
-Mark Read=
-Mark Unread=
-From=
-(No description)=
-No maillist=
-CC=
-Read=
-Ascending=
-Descending=
-Filter=
-Allow multiple selection=
-selected=
-(Un)select all=
-No mail=
+Name=
+No drafts=
+Trash=
 Inbox=
-Sent messages=
+Outbox=
 Drafts=
 Contacts=
 Mail lists=
-About=
+Options=
 Close=
 (No subject)=
-Date=
+Player name=
+That name is already in your contacts=
+The contact name cannot be empty.=
+Save=
+Maillist name=
+Desc=
+Players=
+That name is already in your mailing lists.=
+The mailing list name cannot be empty.=
+Mark Read=
+Mark Unread=
+Mark Spam=
+Unmark Spam=
 Reply=
 Reply all=
 Forward=
+Reply only to the sender=
+Reply to all involved people=
+Transfer message to other people=
+Date=
+From=
+Filter=
+Allow multiple selection=
+@1 of @2 selected=
+(Un)select all=
+No mail=
+Read=
+Ascending=
+Descending=
+(No description)=
+No maillist=
+Receivers=
+(Un)mute sender=
 Add=
 Remove=
-Name=
-To=
+Reset=
+Restore=
+Empty=
+Trash is empty=
+From/To=
+No contacts=
+The method of delivery to @1 is invalid.=
+The recipient @1 could not be identified.=
+@1 rejected your mail.=
+Chat notifications=
+Receive a message in the chat when there is a new message=
+On join notifications=
+Receive a message at login when inbox isn't empty=
+HUD notifications=
+Show an HUD notification when inbox isn't empty=
+Sound notifications=
+Play a sound when there is a new message=
+Show unread in different color=
+Show CC/BCC in different color=
+Default sorting field=
+Default sorting direction=
+Move deleted messages to trash=
+Automatic marking read=
+Mark a message as read when opened=
+Date format=
+Timezone offset=
+Offset to add to server time.=
+Mute list=
+Notifications=
+Message list=
+Fields=
+Spam=
+Other=
+Date and Time=
+years=
+months=
+weeks=
+days=
+hours=
+minuts=
+seconds=
+@1 ago=

migrate.lua

@@ -1,13 +1,13 @@
-
 local STORAGE_VERSION_KEY = "@@version"
+local CURRENT_VERSION = 3.1
 
 local function migrate_v1_to_v3()
-	local file = io.open(minetest.get_worldpath().."/mail.db", "r")
+	local file = io.open(core.get_worldpath().."/mail.db", "r")
 	assert(file)
 	print("[mail] Migration from v1 to v3 database")
 
 	local data = file:read("*a")
-	local oldmails = minetest.deserialize(data)
+	local oldmails = core.deserialize(data)
 	file:close()
 
 	for name, oldmessages in pairs(oldmails) do
@@ -28,7 +28,7 @@ local function migrate_v1_to_v3()
 
 	-- rename file
 	print("[mail,v1] migration done, renaming old mail.db")
-	os.rename(minetest.get_worldpath().."/mail.db", minetest.get_worldpath().."/mail.db.old")
+	os.rename(core.get_worldpath().."/mail.db", core.get_worldpath().."/mail.db.old")
 end
 
 local function read_json_file(path)
@@ -36,7 +36,7 @@ local function read_json_file(path)
 	local content = {}
 	if file then
 		local json = file:read("*a")
-		content = minetest.parse_json(json or "[]") or {}
+		content = core.parse_json(json or "[]") or {}
 		file:close()
 	end
 	return content
@@ -44,13 +44,13 @@ end
 
 -- migrate from v2 to v3 database
 local function migrate_v2_to_v3()
-	local maildir = minetest.get_worldpath().."/mails"
-	minetest.mkdir(maildir) -- if necessary (eg. first login)
+	local maildir = core.get_worldpath().."/mails"
+	core.mkdir(maildir) -- if necessary (eg. first login)
 	print("[mail] Migration from v2 to v3 database")
 
 	-- defer execution until auth-handler ready (first server-step)
-	minetest.after(0, function()
-		for playername, _ in minetest.get_auth_handler().iterate() do
+	core.after(0, function()
+		for playername, _ in core.get_auth_handler().iterate() do
 			local entry = mail.get_storage_entry(playername)
 
 			local player_contacts = read_json_file(maildir .. "/contacts/" .. playername .. ".json")
@@ -80,20 +80,149 @@ local function migrate_v2_to_v3()
 	end)
 end
 
+
+
+local function search_box(playername, box, uuid)
+	local e = mail.get_storage_entry(playername)
+	for _, m in ipairs(e[box]) do
+		if m.id == uuid then
+		return { time = m.time, from = m.from, to = m.to, cc = m.cc, bcc = m.bcc, subject = m.subject, body = m.body } end
+	end
+	return false
+end
+
+local function search_boxes(playername, boxes, uuid)
+	local result
+	for _, b in ipairs(boxes) do
+		result = search_box(playername, b, uuid)
+		if result then return result end
+	end
+end
+
+local function is_uuid_existing(uuid)
+	local boxes = {"inbox", "outbox", "drafts", "trash"}
+	if mail.storage.get_keys then
+		for _, k in ipairs(mail.storage:get_keys()) do
+			if string.sub(k,1,5) == "mail/" then
+				local p = string.sub(k, 6)
+				local result = search_boxes(p, boxes, uuid)
+				if result then return result end
+			end
+		end
+	else
+		for p, _ in core.get_auth_handler().iterate() do
+			local result = search_boxes(p, boxes, uuid)
+			if result then return result end
+		end
+    end
+    return false
+end
+
+local function are_message_sames(a, b)
+	return a.time == b.time
+	   and a.from == b.from
+	   and a.to == b.to
+	   and a.cc == b.cc
+	   and a.bcc == b.bcc
+	   and a.subject == b.subject
+	   and a.body == b.body
+end
+
+local function replace_other_player_message_uuid(p, m, uuid, new_uuid)
+	local er = mail.get_storage_entry(p)
+	for _, r in ipairs(er.inbox) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	for _, r in ipairs(er.outbox) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	for _, r in ipairs(er.drafts) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	for _, r in ipairs(er.trash) do
+		if r.id == uuid and not are_message_sames(m, r) then
+			r.id = new_uuid
+		end
+	end
+	mail.set_storage_entry(p, er)
+end
+
+local function fix_box_duplicate_uuids(playername, box)
+	local e = mail.get_storage_entry(playername)
+	for _, m in ipairs(e[box]) do
+		local uuid = m.id
+		local exists = is_uuid_existing(uuid)
+		if exists and not are_message_sames(exists, m) then
+			local new_uuid = mail.new_uuid() -- generates a new uuid to replace doublons
+			if mail.storage.get_keys then
+				for _, k in ipairs(mail.storage:get_keys()) do
+					if string.sub(k,1,5) == "mail/" then
+						local p = string.sub(k, 6)
+						replace_other_player_message_uuid(p, m, uuid, new_uuid)
+					end
+				end
+			else
+				for p, _ in core.get_auth_handler().iterate() do
+					replace_other_player_message_uuid(p, m, uuid, new_uuid)
+				end
+			end
+		end
+	end
+end
+
+local function fix_player_duplicate_uuids(playername)
+	fix_box_duplicate_uuids(playername, "inbox")
+	fix_box_duplicate_uuids(playername, "outbox")
+	fix_box_duplicate_uuids(playername, "drafts")
+	fix_box_duplicate_uuids(playername, "trash")
+end
+
+-- repair database for uuid doublons
+local function repair_storage()
+	-- iterate through players
+	-- get_keys() was introduced in 5.7
+	if mail.storage.get_keys then
+		for _, k in ipairs(mail.storage:get_keys()) do
+			if string.sub(k,1,5) == "mail/" then
+				local p = string.sub(k, 6)
+				fix_player_duplicate_uuids(p)
+			end
+		end
+	else
+		core.after(0, function()
+			for p, _ in core.get_auth_handler().iterate() do
+				fix_player_duplicate_uuids(p)
+			end
+		end)
+	end
+end
+
 function mail.migrate()
 	-- check for v2 storage first, v1-migration might have set the v3-flag already
-	local version = mail.storage:get_int(STORAGE_VERSION_KEY)
-	if version < 3 then
+	local version = mail.storage:get_float(STORAGE_VERSION_KEY)
+	if version < math.floor(CURRENT_VERSION) then
 		-- v2 to v3
 		migrate_v2_to_v3()
-		mail.storage:set_int(STORAGE_VERSION_KEY, 3)
+		mail.storage:set_float(STORAGE_VERSION_KEY, CURRENT_VERSION)
 	end
 
 	-- check for v1 storage
-	local v1_file = io.open(minetest.get_worldpath().."/mail.db", "r")
+	local v1_file = io.open(core.get_worldpath().."/mail.db", "r")
 	if v1_file then
 		-- v1 to v3
 		migrate_v1_to_v3()
-		mail.storage:set_int(STORAGE_VERSION_KEY, 3)
+		mail.storage:set_float(STORAGE_VERSION_KEY, CURRENT_VERSION)
+	end
+
+	-- repair storage for uuid doublons
+	if version < CURRENT_VERSION  then
+		repair_storage()
+		mail.storage:set_float(STORAGE_VERSION_KEY, CURRENT_VERSION)
 	end
 end

mod.conf

@@ -1,3 +1,4 @@
 name = mail
 description = ingame mail-system
-optional_depends = canonical_name,default,mtt,unified_inventory
+
+optional_depends = canonical_name,default,mtt,unified_inventory,sfinv_buttons,beerchat

mtt.lua

@@ -1,7 +1,7 @@
 
 mtt.register("setup", function(callback)
     -- create test players
-    local auth_handler = minetest.get_auth_handler()
+    local auth_handler = core.get_auth_handler()
     auth_handler.set_password("player1", "")
     auth_handler.set_password("player2", "")
     auth_handler.set_password("player3", "")

onjoin.lua

@@ -1,5 +1,8 @@
-minetest.register_on_joinplayer(function(player)
-	minetest.after(2, function(name)
+-- translation
+local S = mail.S
+
+core.register_on_joinplayer(function(player)
+	core.after(2, function(name)
 		local entry = mail.get_storage_entry(name)
 		local messages = entry.inbox
 		mail.hud_update(name, messages)
@@ -12,10 +15,9 @@ minetest.register_on_joinplayer(function(player)
 			end
 		end
 
-		if unreadcount > 0 then
-			minetest.chat_send_player(name,
-				minetest.colorize("#00f529", "(" ..  unreadcount .. ") You have mail! Type /mail to read"))
-
+		if unreadcount > 0 and mail.get_setting(name, "onjoin_notifications") then
+			core.chat_send_player(name,
+				core.colorize(mail.get_color("new"), "(" .. unreadcount .. ") " .. S("You have mail! Type /mail to read")))
 		end
 	end, player:get_player_name())
 end)

player_recipients.lua

@@ -0,0 +1,53 @@
+-- translation
+local S = mail.S
+
+local has_canonical_name = core.get_modpath("canonical_name")
+
+mail.register_on_player_receive(function(name, msg)
+	-- add to inbox
+	local entry = mail.get_storage_entry(name)
+	table.insert(entry.inbox, msg)
+	mail.set_storage_entry(name, entry)
+
+	-- notify recipients that happen to be online
+	local mail_alert = S("You have a new message from @1! Subject: @2",  msg.from, msg.subject) ..
+	"\n" .. S("To view it, type /mail")
+	local inventory_alert = S("You could also use the button in your inventory.")
+	local player = core.get_player_by_name(name)
+	if player then
+		if mail.get_setting(name, "chat_notifications") == true then
+			core.chat_send_player(name, mail_alert)
+			if core.get_modpath("unified_inventory") or core.get_modpath("sfinv_buttons") then
+				core.chat_send_player(name, inventory_alert)
+			end
+		end
+		if mail.get_setting(name, "sound_notifications") == true then
+			core.sound_play("mail_notif", {to_player=name})
+		end
+		local receiver_entry = mail.get_storage_entry(name)
+		local receiver_messages = receiver_entry.inbox
+		mail.hud_update(name, receiver_messages)
+	end
+end)
+
+mail.register_recipient_handler(function(_, pname)
+	if not core.player_exists(pname) then
+		return nil
+	end
+	return true, function(msg)
+		for _, on_player_receive in ipairs(mail.registered_on_player_receives) do
+			if on_player_receive(pname, msg) then
+				break
+			end
+		end
+	end
+end)
+
+if has_canonical_name then
+	mail.register_recipient_handler(function(_, name)
+		local realname = canonical_name.get(name)
+		if realname then
+			return true, realname
+		end
+	end)
+end

storage.lua

@@ -8,26 +8,71 @@ local function populate_entry(e)
 	e.inbox = e.inbox or {}
 	e.outbox = e.outbox or {}
 	e.drafts = e.drafts or {}
+	e.trash = e.trash or {}
 	e.lists = e.lists or {}
+	e.settings = e.settings or {}
 	return e
 end
 
+local cache = {}
+
+-- retrieve the storage entry for the player
 function mail.get_storage_entry(playername)
-	local str = mail.storage:get_string(STORAGE_PREFIX .. playername)
+	local key = STORAGE_PREFIX .. playername
+	if cache[key] then
+		-- use cached entry
+		return cache[key]
+	end
+
+	local str = mail.storage:get_string(key)
+	local entry
 	if str == "" then
 		-- new entry
-		return populate_entry()
+		entry = populate_entry()
 	else
 		-- deserialize existing entry
-		local e = minetest.parse_json(str)
-		return populate_entry(e)
+		local e = core.parse_json(str)
+		entry = populate_entry(e)
 	end
+
+	-- cache for next time
+	cache[key] = entry
+	return entry
 end
 
+-- entries queued for saving
+local save_queued_entries = {}
+
+-- save the storage entry for the player
 function mail.set_storage_entry(playername, entry)
-	mail.storage:set_string(STORAGE_PREFIX .. playername, minetest.write_json(entry))
+	local key = STORAGE_PREFIX .. playername
+	-- cache
+	cache[key] = entry
+	-- enqueue for writing
+	save_queued_entries[key] = entry
 end
 
+local function save_worker()
+	for key, entry in pairs(save_queued_entries) do
+		-- write to backend
+		mail.storage:set_string(key, core.write_json(entry))
+	end
+
+	-- clear queue
+	save_queued_entries = {}
+
+	-- clear cached entries
+	cache = {}
+
+	-- save every second
+	core.after(1, save_worker)
+end
+
+-- start save-worker loop
+save_worker()
+-- save on shutdown
+core.register_on_shutdown(save_worker)
+
 -- get a mail by id from the players in- or outbox
 function mail.get_message(playername, msg_id)
 	local entry = mail.get_storage_entry(playername)
@@ -41,6 +86,43 @@ function mail.get_message(playername, msg_id)
 			return msg
 		end
 	end
+	for _, msg in ipairs(entry.drafts) do
+		if msg.id == msg_id then
+			return msg
+		end
+	end
+	for _, msg in ipairs(entry.trash) do
+		if msg.id == msg_id then
+			return msg
+		end
+	end
+end
+
+-- get player boxes where a message appears
+function mail.get_message_boxes(playername, msg_id)
+	local entry = mail.get_storage_entry(playername)
+	local boxes = {}
+	for _, msg in ipairs(entry.inbox) do
+		if msg.id == msg_id then
+			table.insert(boxes, "inbox")
+		end
+	end
+	for _, msg in ipairs(entry.outbox) do
+		if msg.id == msg_id then
+			table.insert(boxes, "outbox")
+		end
+	end
+	for _, msg in ipairs(entry.drafts) do
+		if msg.id == msg_id then
+			table.insert(boxes, "drafts")
+		end
+	end
+	for _, msg in ipairs(entry.trash) do
+		if msg.id == msg_id then
+			table.insert(boxes, "trash")
+		end
+	end
+	return boxes
 end
 
 local function safe_find(str, sub)
@@ -72,16 +154,86 @@ function mail.sort_messages(messages, sortfield, descending, filter)
 	return results
 end
 
--- marks a mail read by its id
-function mail.mark_read(playername, msg_ids)
+local function mark_property(playername, property, msg_ids, value, hud_update)
 	local entry = mail.get_storage_entry(playername)
 	if type(msg_ids) ~= "table" then -- if this is not a table
 		msg_ids = { msg_ids }
 	end
-	for _, read_msg_id in ipairs(msg_ids) do
+	for _, property_msg_id in ipairs(msg_ids) do
 		for _, entry_msg in ipairs(entry.inbox) do
-			if entry_msg.id == read_msg_id then
-				entry_msg.read = true
+			if entry_msg.id == property_msg_id then
+				entry_msg[property] = value
+			end
+		end
+	end
+	mail.set_storage_entry(playername, entry)
+	if hud_update then
+		mail.hud_update(playername, entry.inbox)
+	end
+	return
+end
+
+-- marks a mail read by its id
+function mail.mark_read(playername, msg_ids)
+	mark_property(playername, "read", msg_ids, true, true)
+	return
+end
+
+-- marks a mail unread by its id
+function mail.mark_unread(playername, msg_ids)
+	mark_property(playername, "read", msg_ids, false, true)
+	return
+end
+
+-- marks a mail as a spam
+function mail.mark_spam(playername, msg_ids)
+	mark_property(playername, "spam", msg_ids, true)
+	return
+end
+
+-- marks a mail as a non-spam
+function mail.unmark_spam(playername, msg_ids)
+	mark_property(playername, "spam", msg_ids, false)
+	return
+end
+
+-- deletes a mail by its id
+function mail.delete_mail(playername, msg_ids, delete_in_trash)
+	local entry = mail.get_storage_entry(playername)
+	if type(msg_ids) ~= "table" then -- if this is not a table
+		msg_ids = { msg_ids }
+	end
+	for i = #entry.inbox, 1, -1 do
+		for _, deleted_msg in ipairs(msg_ids) do
+			if entry.inbox[i].id == deleted_msg then
+				table.remove(entry.inbox, i)
+				break
+			end
+		end
+	end
+	for i = #entry.outbox, 1, -1 do
+		for _, deleted_msg in ipairs(msg_ids) do
+			if entry.outbox[i].id == deleted_msg then
+				table.remove(entry.outbox, i)
+				break
+			end
+		end
+	end
+	for i = #entry.drafts, 1, -1 do
+		for _, deleted_msg in ipairs(msg_ids) do
+			if entry.drafts[i].id == deleted_msg then
+				table.remove(entry.drafts, i)
+				break
+			end
+		end
+	end
+	if delete_in_trash then
+		for i = #entry.trash, 1, -1 do
+			for _, deleted_msg in ipairs(msg_ids) do
+				if entry.trash[i].id == deleted_msg then
+					table.remove(entry.trash, i)
+					break
+				end
 			end
 		end
 	end
@@ -90,50 +242,46 @@ function mail.mark_read(playername, msg_ids)
 	return
 end
 
--- marks a mail unread by its id
-function mail.mark_unread(playername, msg_ids)
+-- move to trash mails by id
+function mail.trash_mail(playername, msg_ids)
 	local entry = mail.get_storage_entry(playername)
 	if type(msg_ids) ~= "table" then -- if this is not a table
 		msg_ids = { msg_ids }
 	end
-	for _, unread_msg_id in ipairs(msg_ids) do
-		for _, entry_msg in ipairs(entry.inbox) do
-			if entry_msg.id == unread_msg_id then
-				entry_msg.read = false
+	for _, id in ipairs(msg_ids) do
+		local msg = mail.get_message(playername, id)
+		msg.previous_boxes = mail.get_message_boxes(playername, id)
+		table.insert(entry.trash, 1, msg)
 	end
+	mail.set_storage_entry(playername, entry)
+	mail.delete_mail(playername, msg_ids)
+	return
+end
+
+-- restore a mail from trash
+function mail.restore_mail(playername, msg_id)
+	local entry = mail.get_storage_entry(playername)
+	for i, msg in ipairs(entry.trash) do
+		if msg.id == msg_id then
+			-- not anymore store previous boxes in json
+			local previous_boxes = msg.previous_boxes
+			msg.previous_boxes = nil
+			-- restore it in all previous boxes
+			for _, box in ipairs(previous_boxes) do
+				table.insert(entry[box], msg)
+			end
+			-- then delete it from trash
+			table.remove(entry.trash, i)
 		end
 	end
 	mail.set_storage_entry(playername, entry)
 	return
 end
 
--- deletes a mail by its id
-function mail.delete_mail(playername, msg_ids)
+-- clear the trash
+function mail.empty_trash(playername)
 	local entry = mail.get_storage_entry(playername)
-	if type(msg_ids) ~= "table" then -- if this is not a table
-		msg_ids = { msg_ids }
-	end
-	for i, msg in ipairs(entry.inbox) do
-		for _, deleted_msg in ipairs(msg_ids) do
-			if msg.id == deleted_msg then
-				table.remove(entry.inbox, i)
-			end
-		end
-	end
-	for i, msg in ipairs(entry.outbox) do
-		for _, deleted_msg in ipairs(msg_ids) do
-			if msg.id == deleted_msg then
-				table.remove(entry.outbox, i)
-			end
-		end
-	end
-	for i, msg in ipairs(entry.drafts) do
-		for _, deleted_msg in ipairs(msg_ids) do
-			if msg.id == deleted_msg then
-				table.remove(entry.drafts, i)
-			end
-		end
-	end
+	entry.trash = {}
 	mail.set_storage_entry(playername, entry)
 	return
 end
@@ -176,6 +324,17 @@ function mail.get_contacts(playername)
 	return entry.contacts
 end
 
+-- get a contact
+function mail.get_contact(playername, contactname)
+	local entry = mail.get_storage_entry(playername)
+	for _, existing_contact in ipairs(entry.contacts) do
+		if existing_contact.name == contactname then
+			return existing_contact
+		end
+	end
+	return false
+end
+
 -- returns the maillists of a player
 function mail.get_maillists(playername)
 	local entry = mail.get_storage_entry(playername)
@@ -187,6 +346,9 @@ function mail.get_maillist_by_name(playername, listname)
 	local entry = mail.get_storage_entry(playername)
 	for _, list in ipairs(entry.lists) do
 		if list.name == listname then
+			if not list.players then
+				list.players = {}
+			end
 			return list
 		end
 	end
@@ -203,6 +365,9 @@ function mail.update_maillist(playername, list, old_list_name)
 		end
 	end
 	-- insert
+	if not list.players then
+		list.players = {}
+	end
 	table.insert(entry.lists, list)
 	mail.set_storage_entry(playername, entry)
 end
@@ -219,33 +384,81 @@ function mail.delete_maillist(playername, listname)
 	end
 end
 
-function mail.extractMaillists(receivers_string, maillists_owner)
-	local receivers = mail.parse_player_list(receivers_string) -- extracted receivers
+local function extract_maillists_main(receivers, maillists_owner, expanded_receivers, seen)
+	if type(receivers) == "string" then
+		receivers = mail.parse_player_list(receivers)
+	end
 
-	-- extract players from mailing lists
-	while string.find(receivers_string, "@") do
-		local globalReceivers = mail.parse_player_list(receivers_string) -- receivers including maillists
-		receivers = {}
-		for _, receiver in ipairs(globalReceivers) do
-			local receiverInfo = receiver:split("@") -- @maillist
-			if receiverInfo[1] and receiver == "@" .. receiverInfo[1] then
-				local maillist = mail.get_maillist_by_name(maillists_owner, receiverInfo[1])
+	for _, receiver in pairs(receivers) do
+		if seen[receiver] then
+			-- Do not add/expand this receiver as it is already seen
+			core.log("verbose", ("mail: ignoring duplicate receiver %q during maillist expansion"):format(receiver))
+		elseif string.find(receiver, "^@") then
+			seen[receiver] = true
+			local listname = string.sub(receiver, 2)
+			local maillist = mail.get_maillist_by_name(maillists_owner, listname)
 			if maillist then
-					for _, playername in ipairs(maillist.players) do
-						table.insert(receivers, playername)
+				core.log("verbose", ("mail: expanding maillist %q"):format(listname))
+				for _, entry in ipairs(maillist.players) do
+					extract_maillists_main(entry, maillists_owner, expanded_receivers, seen)
 				end
 			end
-			else -- in case of player
-				table.insert(receivers, receiver)
+		else
+			seen[receiver] = true
+			core.log("verbose", ("mail: adding %q to receiver list during maillist expansion"):format(receiver))
+			table.insert(expanded_receivers, receiver)
 		end
 	end
-		receivers_string = mail.concat_player_list(receivers)
-	end
-
-	return receivers
 end
 
-function mail.pairsByKeys(t, f)
+function mail.extract_maillists(receivers, maillists_owner)
+	local expanded_receivers = {}
+	extract_maillists_main(receivers, maillists_owner, expanded_receivers, {})
+	return expanded_receivers
+end
+
+function mail.get_setting_default_value(key)
+	return mail.settings[key].default
+end
+
+function mail.get_setting(playername, key)
+	local entry = mail.get_storage_entry(playername)
+	local value = (entry.settings[key] == nil
+		and {mail.get_setting_default_value(key)}
+		or {entry.settings[key]})[1]
+
+	if mail.settings[key].sync then -- in case this setting is shared with another mod
+		local sync_value = mail.settings[key].sync(playername) -- get new value
+		if sync_value then
+			value = sync_value
+			mail.set_setting(playername, key, value, true) -- update the setting in mail storage and don't transfer it again
+		end
+	end
+
+	return value
+end
+
+-- add or update a setting
+function mail.set_setting(playername, key, value, not_transfer)
+	local entry = mail.get_storage_entry(playername)
+	local valid_value = value
+	if mail.settings[key].check then
+		valid_value = mail.settings[key].check(playername, value)
+	end
+	entry.settings[key] = valid_value
+	mail.set_storage_entry(playername, entry)
+	if not not_transfer and mail.settings[key].transfer then -- in case this setting is shared with another mod
+		mail.settings[key].transfer(playername, valid_value)
+	end
+end
+
+function mail.reset_settings(playername)
+	local entry = mail.get_storage_entry(playername)
+	entry.settings = {}
+	mail.set_storage_entry(playername, entry)
+end
+
+function mail.pairs_by_keys(t, f)
 	-- http://www.lua.org/pil/19.3.html
 	local a = {}
 	for n in pairs(t) do table.insert(a, n) end

test/Dockerfile

@@ -1,4 +1,4 @@
-ARG ENGINE_VERSION=5.5.0
+ARG ENGINE_VERSION=5.7.0
 FROM registry.gitlab.com/minetest/minetest/server:${ENGINE_VERSION}
 
 # copy old v1 maildb for migration testing
@@ -7,11 +7,9 @@ COPY ./mail.db /root/.minetest/worlds/world/mail.db
 COPY ./old_v2_player.json /root/.minetest/worlds/world/mails/
 COPY ./auth.sqlite /root/.minetest/worlds/world/auth.sqlite
 
-
 USER root
 RUN apk add git &&\
     mkdir -p /root/.minetest/worlds/world/worldmods/ &&\
     git clone https://github.com/BuckarooBanzay/mtt /root/.minetest/worlds/world/worldmods/mtt
 
-
 ENTRYPOINT minetestserver --config /minetest.conf

ui/about.lua

@@ -1,43 +1,152 @@
+-- translation
+local S = mail.S
+
 local FORMNAME = "mail:about"
 
+local groups = {
+	{ "o", S("Original author")},
+	{ "c", S("Code")},
+	{ "i", S("Internationalization")},
+	{ "t", S("Textures")},
+	{ "a", S("Audio")},
+}
+
+local contributors = {
+	{ name = "Cheapie", groups = {"o", "c"} },
+	{ name = "aBlueShadow", groups = {"c"} },
+	{ name = "APercy", groups = {"i"} },
+	{ name = "Athozus", groups = {"c", "i"} },
+	{ name = "BuckarooBanzay", groups = {"c"} },
+	{ name = "Chache", groups = {"i"} },
+	{ name = "Dennis Jenkins", groups = {"c"} },
+	{ name = "Emojigit", groups = {"c", "i"} },
+	{ name = "Eredin", groups = {"i"} },
+	{ name = "fluxionary", groups = {"c"} },
+	{ name = "imre84", groups = {"c"} },
+	{ name = "Muhammad Rifqi Priyo Susanto", groups = {"i"} },
+	{ name = "NatureFreshMilk", groups = {"c", "t"} },
+	{ name = "Niklp", groups = {"c", "i"} },
+	{ name = "Nuno Filipe Povoa", groups = {"a"} },
+	{ name = "nyomi", groups = {"i"} },
+	{ name = "OgelGames", groups = {"c"} },
+	{ name = "Panquesito7", groups = {"c"} },
+	{ name = "Peter Nerlich", groups = {"c"} },
+	{ name = "Rubenwardy", groups = {"c"} },
+	{ name = "savilli", groups = {"c"} },
+	{ name = "Singularis", groups = {"c"} },
+	{ name = "SX", groups = {"c"} },
+	{ name = "TheTrueBeginner", groups = {"i"} },
+	{ name = "Thomas Rudin", groups = {"c"} },
+	{ name = "Toby1710", groups = {"c"} },
+	{ name = "whosit", groups = {"c"} },
+	{ name = "Wuzzy", groups = {"i"} },
+	{ name = "y5nw", groups = {"c", "i"} },
+}
+
 function mail.show_about(name)
+	mail.selected_idxs.contributor_grouping[name] = tonumber(mail.selected_idxs.contributor_grouping[name]) or 1
+
 	local formspec = [[
 			size[10,6;]
+			tabheader[0,0;optionstab;]] .. S("Settings") .. "," .. S("About") .. [[;2;false;false]
 			button[9.35,0;0.75,0.5;back;X]
-			label[0,0;Mail]
-			label[0,0.4;Provided my mt-mods]
-			label[0,0.8;Version: 1.1.1]
-			label[0,1.4;Licenses:]
-			label[0.2,1.8;Expat (code), WTFPL (textures)]
-			label[0,2.4;https://github.com/mt-mods/mail]
-			label[0,2.8;https://content.minetest.net/packages/mt-mods/mail]
-			textarea[0.5,4.0;4,5.5;;Note;]] ..
-			[[NOTE: Communication using this system is NOT guaranteed to be private!]] ..
-			[[ Admins are able to view the messages of any player.]
 
-			tablecolumns[color;text;text]
-			table[5,0.75;4.9,5.5;contributors;]] ..
-			[[#999,Contributors,,]] ..
-			[[#FFD700,Cheapie,Initial idea/project,]] ..
-			[[#FFF,Rubenwardy,Lua/UI improvements,]] ..
-			[[#FFF,BuckarooBanzay,Clean-ups\, Refactoring,]] ..
-			[[#FFF,Athozus,Outbox\, Maillists\, UI\, Drafts,]] ..
-			[[#FFF,fluxionary,Minor fixups,]] ..
-			[[#FFF,SX,Various fixes\, UI,]] ..
-			[[#FFF,Toby1710,Ux fixes,]] ..
-			[[#FFF,Peter Nerlich,CC\, BCC]
-		]] .. mail.theme
+			box[0,0;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,0;Mail]
 
-	minetest.show_formspec(name, FORMNAME, formspec)
+			label[0.2,0.5;]] .. S("Provided by mt-mods") .. [[]
+			label[0.2,0.9;]] .. S("Version: @1", "1.5.0-dev") .. [[]
+
+			box[0,1.5;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,1.5;]] .. S("Licenses") .. [[]
+			label[0.2,2.0;]] .. S("Expat (code), WTFPL (textures)") .. [[]
+
+			box[0,2.6;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,2.6;]] .. S("Note") .. [[]
+			textarea[0.5,3.15;4,5.5;;;]] ..
+			S("Communication using this system is NOT guaranteed to be private!") .. " " ..
+			S("Admins are able to view the messages of any player.") .. [[]
+
+			button[0,5.7;2,0.5;github;GitHub]
+			button[2,5.7;2,0.5;contentdb;ContentDB]
+
+			box[4,0;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[4.2,0;]] .. S("Contributors") .. [[]
+
+			dropdown[4,0.75;6.4;contributor_grouping;]]
+				.. S("Group by name") .. ","
+				.. S("Group by contribution") .. ";" .. mail.selected_idxs.contributor_grouping[name] .. [[;true]
+			]]
+
+	local contributor_list, contributor_columns = {}
+
+	if mail.selected_idxs.contributor_grouping[name] == 2 then
+		contributor_columns = "color;text"
+		local sorted = {}
+		for _, g in ipairs(groups) do
+			sorted[g[1]] = {}
+		end
+		for _, c in ipairs(contributors) do
+			for _, g in ipairs(c.groups) do
+				table.insert(sorted[g] or {}, c.name)
+			end
+		end
+		for _, g in ipairs(groups) do
+			table.insert(contributor_list, mail.get_color("header") .. "," .. g[2])
+			for _, c in ipairs(sorted[g[1]]) do
+				table.insert(contributor_list, "," .. c)
+			end
+		end
+	else
+		contributor_columns = "text;text"
+		for _, c in ipairs(contributors) do
+			for _, g in ipairs(groups) do
+				local index = table.indexof(c.groups, g[1])
+				if index >= 1 then
+					if index == 1 then
+						table.insert(contributor_list, c.name)
+					else
+						table.insert(contributor_list, "")
+					end
+					table.insert(contributor_list, g[2])
+				end
+			end
+		end
+	end
+
+	formspec = formspec .. ("tablecolumns[%s]"):format(contributor_columns) ..
+			("table[4,1.6;5.9,4.65;contributors;%s]"):format(table.concat(contributor_list, ","))
+
+	formspec = formspec .. mail.theme
+
+	core.show_formspec(name, FORMNAME, formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
 
-	if fields.back then
     local playername = player:get_player_name()
+
+	if fields.back then
 		mail.show_mail_menu(playername)
+
+    elseif fields.optionstab == "1" then
+        mail.selected_idxs.optionstab[playername] = 1
+        mail.show_settings(playername)
+
+    elseif fields.optionstab == "2" then
+        mail.selected_idxs.optionstab[playername] = 2
+        mail.show_about(playername)
+
+	elseif fields.github then
+		core.chat_send_player(playername, "https://github.com/mt-mods/mail")
+
+	elseif fields.contentdb then
+		core.chat_send_player(playername, "https://content.minetest.net/packages/mt-mods/mail")
+	elseif fields.contributor_grouping then
+		mail.selected_idxs.contributor_grouping[playername] = fields.contributor_grouping
+		mail.show_about(playername)
 	end
 end)

ui/compose.lua

@@ -1,8 +1,7 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:compose"
-local msg_id = {}
 
 function mail.show_compose(name, to, subject, body, cc, bcc, id)
 	local formspec = [[
@@ -21,30 +20,25 @@ function mail.show_compose(name, to, subject, body, cc, bcc, id)
 		]] .. mail.theme
 
 	formspec = string.format(formspec,
-		minetest.formspec_escape(to) or "",
-		minetest.formspec_escape(cc) or "",
-		minetest.formspec_escape(bcc) or "",
-		minetest.formspec_escape(subject) or "",
-		minetest.formspec_escape(body) or "")
+		core.formspec_escape(to) or "",
+		core.formspec_escape(cc) or "",
+		core.formspec_escape(bcc) or "",
+		core.formspec_escape(subject) or "",
+		core.formspec_escape(body) or "")
 
-    if id then
-        msg_id[name] = id
-    end
+	mail.selected_idxs.message[name] = id or mail.new_uuid()
 
-	minetest.show_formspec(name, FORMNAME, formspec)
+	core.show_formspec(name, FORMNAME, formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
 
 	local name = player:get_player_name()
     if fields.send then
-        local id = mail.new_uuid()
-        if msg_id[name] then
-            id = msg_id[name]
-        end
+	local id = mail.selected_idxs.message[name] or mail.new_uuid()
         if (fields.to == "" and fields.cc == "" and fields.bcc == "") or fields.body == "" then
             -- if mail is invalid then store it as a draft
             mail.save_draft({
@@ -69,7 +63,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             body = fields.body,
         })
         if not success then
-            minetest.chat_send_player(name, err)
+            core.chat_send_player(name, err)
             return
         end
 
@@ -93,7 +87,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             end
         end
 
-        minetest.after(0.5, function()
+        core.after(0.5, function()
             mail.selected_idxs.drafts[name] = nil
             mail.show_mail_menu(name)
         end)
@@ -115,8 +109,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
     elseif fields.draft then
         local id = mail.new_uuid()
-        if msg_id[name] then
-            id = msg_id[name]
+        if mail.selected_idxs.message[name] then
+            id = mail.selected_idxs.message[name]
         end
         mail.save_draft({
             id = id,

ui/contacts.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:contacts"
 
@@ -9,15 +9,15 @@ local contacts_formspec = "size[8,9;]" .. mail.theme .. [[
 		button[6,1.60;2,0.5;delete;]] .. S("Delete") .. [[]
 		button[6,8.25;2,0.5;back;]] .. S("Back") .. [[]
 		tablecolumns[color;text;text]
-		table[0,0;5.75,9;contacts;#999,]] .. S("Name") .. "," .. S("Note")
+		table[0,0;5.75,9;contacts;]] .. mail.get_color("header") .. "," .. S("Name") .. "," .. S("Note")
 
 
 function mail.show_contacts(name)
     local formspec = contacts_formspec .. mail.compile_contact_list(name, mail.selected_idxs.contacts[name])
-    minetest.show_formspec(name, FORMNAME, formspec)
+    core.show_formspec(name, FORMNAME, formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
@@ -26,10 +26,10 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	local contacts = mail.get_contacts(name)
 
 	if fields.contacts then
-		local evt = minetest.explode_table_event(fields.contacts)
-		for k, _, i in mail.pairsByKeys(contacts) do
+		local evt = core.explode_table_event(fields.contacts)
+		for k, _, i in mail.pairs_by_keys(contacts) do
 			if i == evt.row - 1 then
-				mail.selected_idxs.contacts[name] = k
+				mail.selected_idxs.contacts[name] = tonumber(k)
 				break
 			end
 		end
@@ -58,16 +58,16 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			-- except if it was the last. Then determine the new last
 			local found = false
 			local last = nil
-			for k in mail.pairsByKeys(contacts) do
+			for k in mail.pairs_by_keys(contacts) do
 				if found then
-					mail.selected_idxs.contacts[name] = k
+					mail.selected_idxs.contacts[name] = tonumber(k)
 					break
 				elseif k == mail.selected_idxs.contacts[name] then
 					mail.delete_contact(name, contacts[mail.selected_idxs.contacts[name]].name)
 					mail.selected_idxs.contacts[name] = nil
 					found = true
 				else
-					last = k
+					last = tonumber(k)
 				end
 			end
 			if found and not mail.selected_idxs.contacts[name] then

ui/drafts.lua

@@ -1,22 +1,27 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
-local drafts_formspec = "size[8.5,10;]" .. mail.theme .. [[
-    tabheader[0.3,1;boxtab;]] .. S("Inbox") .. "," .. S("Sent messages").. "," .. S("Drafts") .. [[;3;false;false]
+function mail.show_drafts(name)
+	local trash_tab = ""
+	if mail.get_setting(name, "trash_move_enable") then
+		trash_tab = "," .. S("Trash")
+	end
+
+	local drafts_formspec = "size[8.5,11;]" .. mail.theme .. [[
+		tabheader[0.3,1;boxtab;]] ..
+		S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. trash_tab .. [[;3;false;false]
 
 		button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
 		button[6,0.95;2.5,0.5;edit;]] .. S("Edit") .. [[]
 		button[6,1.70;2.5,0.5;delete;]] .. S("Delete") .. [[]
-    button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-    button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-    button[6,8.7;2.5,0.5;about;]] .. S("About") .. [[]
-    button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+		button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+		button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+		button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+		button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
 		tablecolumns[color;text;text]
-    table[0,0.7;5.75,9.35;drafts;#999,]] .. S("To") .. "," .. S("Subject")
+		table[0,0.7;5.75,10.35;drafts;]] .. mail.get_color("header") .. "," .. S("To") .. "," .. S("Subject")
 
-
-function mail.show_drafts(name)
     local formspec = { drafts_formspec }
     local entry = mail.get_storage_entry(name)
     local messages = entry.drafts
@@ -27,14 +32,14 @@ function mail.show_drafts(name)
 		for _, message in ipairs(messages) do
 			formspec[#formspec + 1] = ","
 			formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = minetest.formspec_escape(message.to)
+			formspec[#formspec + 1] = core.formspec_escape(message.to)
 			formspec[#formspec + 1] = ","
 			if message.subject ~= "" then
 				if string.len(message.subject) > 30 then
-					formspec[#formspec + 1] = minetest.formspec_escape(string.sub(message.subject, 1, 27))
+					formspec[#formspec + 1] = core.formspec_escape(string.sub(message.subject, 1, 27))
 					formspec[#formspec + 1] = "..."
 				else
-					formspec[#formspec + 1] = minetest.formspec_escape(message.subject)
+					formspec[#formspec + 1] = core.formspec_escape(message.subject)
 				end
 			else
 				formspec[#formspec + 1] = S("(No subject)")
@@ -48,5 +53,5 @@ function mail.show_drafts(name)
 	else
 		formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No drafts") .. "]"
 	end
-    minetest.show_formspec(name, "mail:drafts", table.concat(formspec, ""))
+    core.show_formspec(name, "mail:drafts", table.concat(formspec, ""))
 end

ui/edit_contact.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:editcontact"
 
@@ -13,25 +13,23 @@ function mail.show_edit_contact(name, contact_name, note, illegal_name_hint)
 		]]
 	if illegal_name_hint == "collision" then
 		formspec = formspec .. [[
-				label[4,1;]] .. S("That name") .. [[]
-				label[4,1.5;]] .. S("is already in") .. [[]
-				label[4,2;]] .. S("your contacts.") .. [[]
+			textarea[4.25,1;2.5,6;;;]] ..
+			S("That name is already in your contacts") .. [[]
 			]]
 	elseif illegal_name_hint == "empty" then
 		formspec = formspec .. [[
-				label[4,1;]] .. S("The contact") .. [[]
-				label[4,1.5;]] .. S("name cannot") .. [[]
-				label[4,2;]] .. S("be empty.") .. [[]
+			textarea[4.25,1;2.5,6;;;]] ..
+			S("The contact name cannot be empty.") .. [[]
 			]]
 	end
 	formspec = formspec .. mail.theme
 	formspec = string.format(formspec,
-		minetest.formspec_escape(contact_name or ""),
-		minetest.formspec_escape(note or ""))
-	minetest.show_formspec(name, FORMNAME, formspec)
+		core.formspec_escape(contact_name or ""),
+		core.formspec_escape(note or ""))
+	core.show_formspec(name, FORMNAME, formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
@@ -40,19 +38,21 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	local contacts = mail.get_contacts(name)
 
 	if fields.save then
-		if mail.selected_idxs.contacts[name] and mail.selected_idxs.contacts[name] ~= "#NEW#" then
-			local contact = contacts[mail.selected_idxs.contacts[name]]
-			if mail.selected_idxs.contacts[name] ~= string.lower(fields.name) then
+		if mail.selected_idxs.contacts[name] then
+			local contact = contacts[mail.selected_idxs.contacts[name]] or {name = ""}
+			if contact.name ~= fields.name or fields.name == "" then
 				-- name changed!
 				if #fields.name == 0 then
 					mail.show_edit_contact(name, contact.name, fields.note, "empty")
 					return true
 
-				elseif contacts[string.lower(fields.name)] ~= nil then
+				elseif mail.get_contact(name, fields.name) then
 					mail.show_edit_contact(name, contact.name, fields.note, "collision")
 					return true
 
 				else
+					contact.name = fields.name
+					contact.note = fields.note
 					mail.update_contact(name, contact)
 					contacts[mail.selected_idxs.contacts[name]] = nil
 				end

ui/edit_maillists.lua

@@ -1,11 +1,9 @@
 -- translation
-local S = minetest.get_translator("mail")
-local old_lists_names = {}
+local S = mail.S
 
 local FORMNAME = "mail:editmaillist"
 
 function mail.show_edit_maillist(playername, maillist_name, desc, players, illegal_name_hint)
-	old_lists_names[playername] = maillist_name
 	local formspec = [[
 			size[6,7]
 			button[4,6.25;2,0.5;back;]] .. S("Back") .. [[]
@@ -16,38 +14,68 @@ function mail.show_edit_maillist(playername, maillist_name, desc, players, illeg
 		]]
 	if illegal_name_hint == "collision" then
 		formspec = formspec .. [[
-				label[4,1;]] .. S("That name") .. [[]
-				label[4,1.5;]] .. S("is already in") .. [[]
-				label[4,2;]] .. S("your maillists.") .. [[]
+			textarea[4.25,1;2.5,6;;;]] ..
+			S("That name is already in your mailing lists.") .. [[]
 			]]
 	elseif illegal_name_hint == "empty" then
 		formspec = formspec .. [[
-				label[4,1;]] .. S("The maillist") .. [[]
-				label[4,1.5;]] .. S("name cannot") .. [[]
-				label[4,2;]] .. S("be empty.") .. [[]
+			textarea[4.25,1;2.5,6;;;]] ..
+			S("The mailing list name cannot be empty.") .. [[]
 			]]
 	end
 	formspec = formspec .. mail.theme
 	formspec = string.format(formspec,
-		minetest.formspec_escape(maillist_name or ""),
-		minetest.formspec_escape(desc or ""),
-		minetest.formspec_escape(players or ""))
-	minetest.show_formspec(playername, FORMNAME, formspec)
+		core.formspec_escape(maillist_name or ""),
+		core.formspec_escape(desc or ""),
+		core.formspec_escape(players or ""))
+	core.show_formspec(playername, FORMNAME, formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
 
 	local name = player:get_player_name()
+	local maillists = mail.get_maillists(name)
+
 	if fields.save then
+		local old_maillist = maillists[mail.selected_idxs.maillists[name]] or {name = ""}
+		if mail.selected_idxs.maillists[name] then
+			if old_maillist.name ~= fields.name or fields.name == "" then
+				-- name changed!
+				if #fields.name == 0 then
+					mail.show_edit_maillist(name, old_maillist.name, fields.desc, fields.players, "empty")
+					return true
+
+				elseif mail.get_maillist_by_name(name, fields.name) then
+					mail.show_edit_maillist(name, old_maillist.name, fields.desc, fields.players, "collision")
+					return true
+
+				else
 					mail.update_maillist(name, {
 						owner = name,
 						name = fields.name,
 						desc = fields.desc,
 						players = mail.parse_player_list(fields.players)
-		}, old_lists_names[name])
+					}, old_maillist.name)
+				end
+			else
+				mail.update_maillist(name, {
+					owner = name,
+					name = fields.name,
+					desc = fields.desc,
+					players = mail.parse_player_list(fields.players)
+				}, old_maillist.name)
+			end
+		else
+			mail.update_maillist(name, {
+				owner = name,
+				name = fields.name,
+				desc = fields.desc,
+				players = mail.parse_player_list(fields.players)
+			}, old_maillist.name)
+		end
 		mail.show_maillists(name)
 
 	elseif fields.back then

ui/events.lua

@@ -1,6 +1,6 @@
 
 -- Getter to filter and sort messages on demand
-local function messageGetter(messages, sortfield, ascending, filter)
+local function message_getter(messages, sortfield, ascending, filter)
     local results
     return function()
         if not results then
@@ -10,16 +10,23 @@ local function messageGetter(messages, sortfield, ascending, filter)
     end
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
-    if formname ~= "mail:inbox" and formname ~= "mail:sent" and formname ~= "mail:drafts" then
-        return
-    elseif fields.quit then
+local function nonempty(x)
+ return ((type(x)=="table")and(#x>0))
+end
+
+core.register_on_player_receive_fields(function(player, formname, fields)
+    if formname ~= "mail:inbox" and formname ~= "mail:outbox"
+    and formname ~= "mail:drafts" and formname ~= "mail:trash" then
         return
     end
 
+    if fields.quit then
+        return true
+    end
+
     -- Get player name and handle / convert common input fields
     local name = player:get_player_name()
-    local filter = fields.filter or mail.selected_idxs.filter[name] or ""
+    local filter = (fields.search and fields.filter) or mail.selected_idxs.filter[name] or ""
     local sortfieldindex = tonumber(fields.sortfield or mail.selected_idxs.sortfield[name]) or 3
     local sortdirection = fields.sortdirection or mail.selected_idxs.sortdirection[name] or "1"
     local inboxsortfield = ({"from","subject","time"})[sortfieldindex]
@@ -27,7 +34,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
     -- Be sure that inbox/outbox selected idxs aren't nil
     mail.selected_idxs.inbox[name] = mail.selected_idxs.inbox[name] or {}
-    mail.selected_idxs.sent[name] = mail.selected_idxs.sent[name] or {}
+    mail.selected_idxs.outbox[name] = mail.selected_idxs.outbox[name] or {}
 
     -- Store common player configuration for reuse
     mail.selected_idxs.sortfield[name] = sortfieldindex
@@ -40,25 +47,31 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
     -- Avoid several selected after disabling the multiple selection
     if not mail.selected_idxs.multipleselection[name] then
         mail.selected_idxs.inbox[name] = { mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]] }
-        mail.selected_idxs.sent[name] = { mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]] }
+        mail.selected_idxs.outbox[name] = { mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]] }
     end
 
-    -- split inbox and sent msgs for different tests
+    -- split inbox and outbox msgs for different tests
     local entry = mail.get_storage_entry(name)
     local messagesDrafts = entry.drafts
-    local getInbox = messageGetter(entry.inbox, inboxsortfield, sortdirection == "2", filter)
-    local getOutbox = messageGetter(entry.outbox, outboxsortfield, sortdirection == "2", filter)
+    local messagesTrash = entry.trash
+    local getInbox = message_getter(entry.inbox, inboxsortfield, sortdirection == "2", filter)
+    local getOutbox = message_getter(entry.outbox, outboxsortfield, sortdirection == "2", filter)
 
     -- Hanmdle formspec event
     if fields.inbox then -- inbox table
-        local evt = minetest.explode_table_event(fields.inbox)
+        local evt = core.explode_table_event(fields.inbox)
         if evt.row == 1 then -- header
             if mail.selected_idxs.sortfield[name] == evt.column-1 then -- if already this field, then change direction
                 mail.selected_idxs.sortdirection[name] = mail.selected_idxs.sortdirection[name] == "2" and "1" or "2"
             end
             mail.selected_idxs.sortfield[name] = evt.column-1 -- update column
             mail.show_mail_menu(name)
-            return
+            return true
+        end
+        local inbox = getInbox()[evt.row-1]
+        if not inbox then
+            mail.show_mail_menu(name)
+            return true
         end
         if mail.selected_idxs.multipleselection[name] then
             if not mail.selected_idxs.inbox[name] then
@@ -67,7 +80,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
             local selected_id = 0
             if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
                 for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
-                    if getInbox()[evt.row-1].id == selected_msg then
+                    if inbox.id == selected_msg then
                         selected_id = i
                         table.remove(mail.selected_idxs.inbox[name], i)
                         break
@@ -75,51 +88,62 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
                 end
             end
             if selected_id == 0 then
-                table.insert(mail.selected_idxs.inbox[name], getInbox()[evt.row-1].id)
+                table.insert(mail.selected_idxs.inbox[name], inbox.id)
+                mail.selected_idxs.message[name] = inbox.id
             end
         else
-            mail.selected_idxs.inbox[name] = { getInbox()[evt.row-1].id }
+            mail.selected_idxs.inbox[name] = { inbox.id }
+            mail.selected_idxs.message[name] = inbox.id
         end
-        if evt.type == "DCL" and getInbox()[evt.row-1] then
-            mail.show_message(name, getInbox()[evt.row-1].id)
+        if evt.type == "DCL" then
+            mail.selected_idxs.message[name] = inbox.id
+            mail.show_message(name, inbox.id)
         else
             mail.show_mail_menu(name)
         end
         return true
     end
 
-    if fields.sent then -- sent table
-        local evt = minetest.explode_table_event(fields.sent)
+    if fields.outbox then -- outbox table
+        local evt = core.explode_table_event(fields.outbox)
         if evt.row == 1 then -- header
             if mail.selected_idxs.sortfield[name] == evt.column-1 then -- if already this field, then change direction
                 mail.selected_idxs.sortdirection[name] = mail.selected_idxs.sortdirection[name] == "2" and "1" or "2"
             end
             mail.selected_idxs.sortfield[name] = evt.column-1 -- update column
             mail.show_mail_menu(name)
-            return
+            return true
+        end
+        local outbox = getOutbox()[evt.row-1]
+        if not outbox then
+            mail.show_mail_menu(name)
+            return true
         end
         if mail.selected_idxs.multipleselection[name] then
-            if not mail.selected_idxs.sent[name] then
-                mail.selected_idxs.sent[name] = {}
+            if not mail.selected_idxs.outbox[name] then
+                mail.selected_idxs.outbox[name] = {}
             end
             local selected_id = 0
-            if mail.selected_idxs.sent[name] and #mail.selected_idxs.sent[name] > 0 then
-                for i, selected_msg in ipairs(mail.selected_idxs.sent[name]) do
-                    if getOutbox()[evt.row-1].id == selected_msg then
+            if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+                for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
+                    if outbox.id == selected_msg then
                         selected_id = i
-                        table.remove(mail.selected_idxs.sent[name], i)
+                        table.remove(mail.selected_idxs.outbox[name], i)
                         break
                     end
                 end
             end
             if selected_id == 0 then
-                table.insert(mail.selected_idxs.sent[name], getOutbox()[evt.row-1].id)
+                table.insert(mail.selected_idxs.outbox[name], outbox.id)
+                mail.selected_idxs.message[name] = outbox.id
             end
         else
-            mail.selected_idxs.sent[name] = { getOutbox()[evt.row-1].id }
+            mail.selected_idxs.outbox[name] = { outbox.id }
+            mail.selected_idxs.message[name] = outbox.id
         end
-        if evt.type == "DCL" and getOutbox()[evt.row-1] then
-            mail.show_message(name, getOutbox()[evt.row-1].id)
+        if evt.type == "DCL" then
+            mail.selected_idxs.message[name] = outbox.id
+            mail.show_message(name, outbox.id)
         else
             mail.show_mail_menu(name)
         end
@@ -127,7 +151,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
     end
 
     if fields.drafts then -- drafts table
-        local evt = minetest.explode_table_event(fields.drafts)
+        local evt = core.explode_table_event(fields.drafts)
         if evt.row == 1 then -- header
             if mail.selected_idxs.sortfield[name] == evt.column-1 then -- if already this field, then change direction
                 mail.selected_idxs.sortdirection[name] = mail.selected_idxs.sortdirection[name] == "2" and "1" or "2"
@@ -138,6 +162,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
         end
         mail.selected_idxs.drafts[name] = evt.row - 1
         if evt.type == "DCL" and messagesDrafts[mail.selected_idxs.drafts[name]] then
+            mail.selected_idxs.message[name] = messagesDrafts[mail.selected_idxs.drafts[name]].id
             mail.show_compose(name,
             messagesDrafts[mail.selected_idxs.drafts[name]].to,
             messagesDrafts[mail.selected_idxs.drafts[name]].subject,
@@ -150,23 +175,50 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
         return true
     end
 
+    if fields.trash then -- trash table
+        local evt = core.explode_table_event(fields.trash)
+        if evt.row == 1 then -- header
+            if mail.selected_idxs.sortfield[name] == evt.column-1 then -- if already this field, then change direction
+                mail.selected_idxs.sortdirection[name] = mail.selected_idxs.sortdirection[name] == "2" and "1" or "2"
+            end
+            mail.selected_idxs.sortfield[name] = evt.column-1 -- update column
+            mail.show_mail_menu(name)
+            return
+        end
+        mail.selected_idxs.trash[name] = evt.row - 1
+        if evt.type == "DCL" and messagesTrash[mail.selected_idxs.trash[name]] then
+            mail.selected_idxs.message[name] = messagesTrash[mail.selected_idxs.trash[name]].id
+            mail.show_message(name, messagesTrash[mail.selected_idxs.trash[name]].id)
+        end
+        return true
+    end
+
     if fields.boxtab == "1" then
         mail.selected_idxs.boxtab[name] = 1
         mail.show_inbox(name, sortfieldindex, sortdirection, filter)
 
     elseif fields.boxtab == "2" then
         mail.selected_idxs.boxtab[name] = 2
-        mail.show_sent(name, sortfieldindex, sortdirection, filter)
+        mail.show_outbox(name, sortfieldindex, sortdirection, filter)
 
     elseif fields.boxtab == "3" then
         mail.selected_idxs.boxtab[name] = 3
         mail.show_drafts(name)
 
+    elseif fields.boxtab == "4" then
+        mail.selected_idxs.boxtab[name] = 4
+        mail.show_trash(name)
+
     elseif fields.read then
-        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then -- inbox table
-            mail.show_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
-        elseif formname == "mail:sent" and mail.selected_idxs.sent[name] then -- sent table
-            mail.show_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
+        if formname == "mail:inbox" and nonempty(mail.selected_idxs.inbox[name]) then -- inbox table
+            mail.selected_idxs.message[name] = mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]]
+        elseif formname == "mail:outbox" and nonempty(mail.selected_idxs.outbox[name]) then -- outbox table
+            mail.selected_idxs.message[name] = mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]]
+        elseif formname == "mail:trash" and messagesTrash[mail.selected_idxs.trash[name]] then
+            mail.selected_idxs.message[name] = messagesTrash[mail.selected_idxs.trash[name]].id
+        end
+        if mail.selected_idxs.message[name] then
+            mail.show_message(name, mail.selected_idxs.message[name])
         end
 
     elseif fields.edit then
@@ -182,40 +234,68 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
         end
 
     elseif fields.delete then
+        local trash_enabled = mail.get_setting(name, "trash_move_enable")
         if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then -- inbox table
+            if trash_enabled then
+                mail.trash_mail(name, mail.selected_idxs.inbox[name])
+            else
                 mail.delete_mail(name, mail.selected_idxs.inbox[name])
-        elseif formname == "mail:sent" and mail.selected_idxs.sent[name] then -- sent table
-            mail.delete_mail(name, mail.selected_idxs.sent[name])
+            end
+            mail.selected_idxs.inbox[name] = {}
+        elseif formname == "mail:outbox" and mail.selected_idxs.outbox[name] then -- outbox table
+            if trash_enabled then
+                mail.trash_mail(name, mail.selected_idxs.outbox[name])
+            else
+                mail.delete_mail(name, mail.selected_idxs.outbox[name])
+            end
+            mail.selected_idxs.outbox[name] = {}
         elseif formname == "mail:drafts" and messagesDrafts[mail.selected_idxs.drafts[name]] then -- drafts table
+            if trash_enabled then
+                mail.trash_mail(name, messagesDrafts[mail.selected_idxs.drafts[name]].id)
+            else
                 mail.delete_mail(name, messagesDrafts[mail.selected_idxs.drafts[name]].id)
             end
+            mail.selected_idxs.drafts[name] = nil
+
+        elseif formname == "mail:trash" and messagesTrash[mail.selected_idxs.trash[name]] then -- trash table
+            mail.delete_mail(name, messagesTrash[mail.selected_idxs.trash[name]].id, true)
+        end
 
         mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
 
+    elseif fields.restore then
+        if messagesTrash[mail.selected_idxs.trash[name]] then
+            mail.restore_mail(name, messagesTrash[mail.selected_idxs.trash[name]].id)
+        end
+        mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
+
     elseif fields.reply then
-        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
             local message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
             mail.reply(name, message)
-        elseif formname == "mail:sent" and mail.selected_idxs.sent[name] then
-            local message = mail.get_message(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
+        elseif
+        formname == "mail:outbox" and mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+            local message = mail.get_message(name, mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]])
             mail.reply(name, message)
         end
 
     elseif fields.replyall then
-        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
             local message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
             mail.replyall(name, message)
-        elseif formname == "mail:sent" and mail.selected_idxs.sent[name] then
-            local message = mail.get_message(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
+        elseif
+        formname == "mail:outbox" and mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+            local message = mail.get_message(name, mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]])
             mail.replyall(name, message)
         end
 
     elseif fields.forward then
-        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
             local message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
             mail.forward(name, message)
-        elseif formname == "mail:sent" and mail.selected_idxs.sent[name] then
-            local message = mail.get_message(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
+        elseif
+        formname == "mail:outbox" and mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+            local message = mail.get_message(name, mail.selected_idxs.outbox[name][#mail.selected_idxs.outbox[name]])
             mail.forward(name, message)
         end
 
@@ -233,43 +313,53 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 
         mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
 
+    elseif fields.markspam then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+            mail.mark_spam(name, mail.selected_idxs.inbox[name])
+        end
+
+        mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
+
+    elseif fields.unmarkspam then
+        if formname == "mail:inbox" and mail.selected_idxs.inbox[name] then
+            mail.unmark_spam(name, mail.selected_idxs.inbox[name])
+        end
+
+        mail.show_mail_menu(name, sortfieldindex, sortdirection, filter)
+
     elseif fields.new then
         mail.show_compose(name)
 
+    elseif fields.empty then
+        mail.empty_trash(name)
+        mail.show_mail_menu(name)
+
     elseif fields.contacts then
         mail.show_contacts(name)
 
     elseif fields.maillists then
         mail.show_maillists(name)
 
-    elseif fields.about then
-        mail.show_about(name)
+    elseif fields.options then
+        mail.show_options(name)
 
     elseif fields.selectall then
         if formname == "mail:inbox" then
-            if not mail.selected_idxs.inbox[name] then
-                mail.selected_idxs.inbox[name] = {}
-            end
-            if #mail.selected_idxs.inbox[name] >= #getInbox() then -- if selection is full
-                mail.selected_idxs.inbox[name] = {}
-            else
-                mail.selected_idxs.inbox[name] = {} -- reset to avoid duplicates
-                mail.selected_idxs.multipleselection[name] = true
+            local selected_number = #mail.selected_idxs.inbox[name]
+            mail.selected_idxs.inbox[name] = {} -- reset for select, unselect and not existing
+            mail.selected_idxs.multipleselection[name] = true -- enable as the button were pressed
+            if selected_number < #getInbox() then -- then populate it if selection isn't full
                 for _, msg in ipairs(getInbox()) do
                     table.insert(mail.selected_idxs.inbox[name], msg.id)
                 end
             end
-        elseif formname == "mail:sent" then
-            if not mail.selected_idxs.sent[name] then
-                mail.selected_idxs.sent[name] = {}
-            end
-            if #mail.selected_idxs.sent[name] >= #getOutbox() then -- if selection is full
-                mail.selected_idxs.sent[name] = {}
-            else
-                mail.selected_idxs.sent[name] = {} -- reset to avoid duplicates
-                mail.selected_idxs.multipleselection[name] = true
+        elseif formname == "mail:outbox" then
+            local selected_number = #mail.selected_idxs.outbox[name]
+            mail.selected_idxs.outbox[name] = {} -- reset for select, unselect and not existing
+            mail.selected_idxs.multipleselection[name] = true -- enable as the button were pressed
+            if selected_number < #getOutbox() then -- then populate it if selection isn't full
                 for _, msg in ipairs(getOutbox()) do
-                    table.insert(mail.selected_idxs.sent[name], msg.id)
+                    table.insert(mail.selected_idxs.outbox[name], msg.id)
                 end
             end
         end

ui/inbox.lua

@@ -1,15 +1,41 @@
 -- translation
-local S = minetest.get_translator("mail")
-
+local S = mail.S
 
 function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
-    sortfieldindex = tonumber(sortfieldindex or mail.selected_idxs.sortfield[name]) or 3
-    sortdirection = sortdirection or mail.selected_idxs.sortdirection[name] or "1"
+    sortfieldindex = tonumber(sortfieldindex or mail.selected_idxs.sortfield[name])
+    or mail.get_setting(name, "defaultsortfield") or 3
+    sortdirection = tostring(sortdirection or mail.selected_idxs.sortdirection[name]
+    or mail.get_setting(name, "defaultsortdirection") or "1")
     filter = filter or mail.selected_idxs.filter[name] or ""
     mail.selected_idxs.inbox[name] = mail.selected_idxs.inbox[name] or {}
 
-    local inbox_formspec = "size[8.5,10;]" .. mail.theme .. [[
-        tabheader[0.3,1;boxtab;]] .. S("Inbox") .. "," .. S("Sent messages").. "," .. S("Drafts") .. [[;1;false;false]
+    local entry = mail.get_storage_entry(name)
+    local sortfield = ({"from","subject","time"})[sortfieldindex]
+    local messages = mail.sort_messages(entry.inbox, sortfield, sortdirection == "2", filter)
+
+    if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
+        for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
+            local is_present = false
+            for _, msg in ipairs(messages) do
+                if msg.id == selected_msg then
+                    is_present = true
+                    break
+                end
+            end
+            if not is_present then
+                table.remove(mail.selected_idxs.inbox[name], i)
+            end
+        end
+    end
+
+    local trash_tab = ""
+    if mail.get_setting(name, "trash_move_enable") then
+        trash_tab = "," .. S("Trash")
+    end
+
+    local inbox_formspec = "size[8.5,11;]" .. mail.theme .. [[
+        tabheader[0.3,1;boxtab;]] ..
+        S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. trash_tab .. [[;1;false;false]
 
         button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
         button[6,0.95;2.5,0.5;read;]] .. S("Read") .. [[]
@@ -17,37 +43,46 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
         button[6,2.45;2.5,0.5;replyall;]] .. S("Reply all") .. [[]
         button[6,3.20;2.5,0.5;forward;]] .. S("Forward") .. [[]
         button[6,3.95;2.5,0.5;delete;]] .. S("Delete") .. [[]
-        button[6,4.82;2.5,0.5;markread;]] .. S("Mark Read") .. [[]
+        button[6,4.85;2.5,0.5;markread;]] .. S("Mark Read") .. [[]
         button[6,5.55;2.5,0.5;markunread;]] .. S("Mark Unread") .. [[]
-        button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-        button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-        button[6,8.7;2.5,0.5;about;]] .. S("About") .. [[]
-        button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+        button[6,6.4;2.5,0.5;markspam;]] .. S("Mark Spam") .. [[]
+        button[6,7.1;2.5,0.5;unmarkspam;]] .. S("Unmark Spam") .. [[]
+        button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+        button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+        button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+        button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
-        dropdown[0,8.4;2,0.5;sortfield;]] ..
+        tooltip[reply;]] .. S("Reply only to the sender") .. [[]
+        tooltip[replyall;]] .. S("Reply to all involved people") .. [[]
+        tooltip[forward;]] .. S("Transfer message to other people") .. [[]
+
+        dropdown[0,9.5;2,0.5;sortfield;]] ..
         S("From") .. "," .. S("Subject") .. "," .. S("Date") .. [[;]] .. sortfieldindex .. [[;true]
-        dropdown[2.0,8.4;2,0.5;sortdirection;]] ..
+        dropdown[2.0,9.5;2,0.5;sortdirection;]] ..
         S("Ascending") .. "," .. S("Descending") .. [[;]] .. sortdirection .. [[;true]
-        field[4.25,8.85;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
-        button[5.14,8.52;0.85,0.5;search;Q]
+        field[4.25,9.95;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
+        image_button[5.14,9.5;0.85,0.85;search.png;search;]
 
-        checkbox[0,9.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
+        checkbox[0,10.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
         tostring(mail.selected_idxs.multipleselection[name]) .. [[]
-        label[0,9.65;]] .. tostring(#mail.selected_idxs.inbox[name]) .. " " .. S("selected") .. [[]
-        button[3.5,9.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
+        label[0,10.65;]] ..
+        S("@1 of @2 selected", tostring(#mail.selected_idxs.inbox[name]), tostring(#messages)) .. [[]
+        button[3.5,10.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
 
         tablecolumns[color;text;text]
-        table[0,0.7;5.75,7.35;inbox;#999,]] .. S("From") .. "," .. S("Subject")
+        table[0,0.7;5.75,8.45;inbox;]] .. mail.get_color("header") .. "," .. S("From") .. "," .. S("Subject")
     local formspec = { inbox_formspec }
-    local entry = mail.get_storage_entry(name)
-    local sortfield = ({"from","subject","time"})[sortfieldindex]
-    local messages = mail.sort_messages(entry.inbox, sortfield, sortdirection == "2", filter)
 
     mail.message_drafts[name] = nil
 
+    local unread_color_enable = mail.get_setting(name, "unreadcolorenable")
+    local cc_color_enable = mail.get_setting(name, "cccolorenable")
+    local mute_list = mail.get_setting(name, "mute_list")
+
     if #messages > 0 then
         for _, message in ipairs(messages) do
             local selected_id = 0
+            local displayed_color = {}
             -- check if message is in selection list and return its id
             if mail.selected_idxs.inbox[name] and #mail.selected_idxs.inbox[name] > 0 then
                 for i, selected_msg in ipairs(mail.selected_idxs.inbox[name]) do
@@ -58,43 +93,30 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
                 end
             end
             if selected_id > 0 then
-                if not message.read then
-                    if not mail.player_in_list(name, message.to) then
-                        formspec[#formspec + 1] = ",#A39E5D"
-                    else
-                        formspec[#formspec + 1] = ",#A39E19"
+                table.insert(displayed_color, "selected")
             end
-                else
-                    if not mail.player_in_list(name, message.to) then
-                        formspec[#formspec + 1] = ",#899888"
-                    else
-                        formspec[#formspec + 1] = ",#466432"
+            if not message.read and unread_color_enable then
+                table.insert(displayed_color, "important")
             end
+            if not mail.player_in_list(name, message.to) and cc_color_enable then
+                table.insert(displayed_color, "additional")
             end
-            else
-                if not message.read then
-                    if not mail.player_in_list(name, message.to) then
-                        formspec[#formspec + 1] = ",#FFD788"
-                    else
-                        formspec[#formspec + 1] = ",#FFD700"
+            if message.spam then
+                table.insert(displayed_color, "warning")
             end
-                else
-                    if not mail.player_in_list(name, message.to) then
-                        formspec[#formspec + 1] = ",#CCCCDD"
-                    else
+            if table.indexof(mute_list, message.from) >= 1 then
+                table.insert(displayed_color, "muted")
+            end
+            formspec[#formspec + 1] = "," .. mail.get_color(displayed_color)
             formspec[#formspec + 1] = ","
-                    end
-                end
-            end
-            formspec[#formspec + 1] = ","
-            formspec[#formspec + 1] = minetest.formspec_escape(message.from)
+            formspec[#formspec + 1] = core.formspec_escape(message.from)
             formspec[#formspec + 1] = ","
             if message.subject ~= "" then
                 if string.len(message.subject) > 30 then
-                    formspec[#formspec + 1] = minetest.formspec_escape(string.sub(message.subject, 1, 27))
+                    formspec[#formspec + 1] = core.formspec_escape(string.sub(message.subject, 1, 27))
                     formspec[#formspec + 1] = "..."
                 else
-                    formspec[#formspec + 1] = minetest.formspec_escape(message.subject)
+                    formspec[#formspec + 1] = core.formspec_escape(message.subject)
                 end
             else
                 formspec[#formspec + 1] = S("(No subject)")
@@ -104,5 +126,6 @@ function mail.show_inbox(name, sortfieldindex, sortdirection, filter)
     else
         formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No mail") .. "]"
     end
-    minetest.show_formspec(name, "mail:inbox", table.concat(formspec, ""))
+
+    core.show_formspec(name, "mail:inbox", table.concat(formspec, ""))
 end

ui/init.lua

@@ -0,0 +1,37 @@
+-- sub files
+local MP = core.get_modpath(core.get_current_modname())
+
+dofile(MP .. "/ui/inbox.lua")
+dofile(MP .. "/ui/outbox.lua")
+dofile(MP .. "/ui/drafts.lua")
+dofile(MP .. "/ui/trash.lua")
+dofile(MP .. "/ui/message.lua")
+dofile(MP .. "/ui/receivers.lua")
+dofile(MP .. "/ui/events.lua")
+dofile(MP .. "/ui/contacts.lua")
+dofile(MP .. "/ui/edit_contact.lua")
+dofile(MP .. "/ui/select_contact.lua")
+dofile(MP .. "/ui/maillists.lua")
+dofile(MP .. "/ui/edit_maillists.lua")
+dofile(MP .. "/ui/compose.lua")
+dofile(MP .. "/ui/options.lua")
+dofile(MP .. "/ui/settings.lua")
+dofile(MP .. "/ui/about.lua")
+
+-- helper function for tabbed overview
+
+function mail.show_mail_menu(playername, sortfield, sortdirection, filter)
+    local index = mail.selected_idxs.boxtab[playername] or 1
+    if not mail.selected_idxs.boxtab[playername] then
+        mail.selected_idxs.boxtab[playername] = 1
+    end
+    if index == 1 then
+        mail.show_inbox(playername, sortfield, sortdirection, filter)
+    elseif index == 2 then
+        mail.show_outbox(playername, sortfield, sortdirection, filter)
+    elseif index == 3 then
+        mail.show_drafts(playername)
+    elseif index == 4 then
+        mail.show_trash(playername)
+    end
+end

ui/mail.lua

@@ -1,12 +0,0 @@
--- helper function for tabbed overview
-
-function mail.show_mail_menu(playername, sortfield, sortdirection, filter)
-    local index = mail.selected_idxs.boxtab[playername] or 1
-    if index == 1 then
-        mail.show_inbox(playername, sortfield, sortdirection, filter)
-    elseif index == 2 then
-        mail.show_sent(playername, sortfield, sortdirection, filter)
-    elseif index == 3 then
-        mail.show_drafts(playername)
-    end
-end

ui/maillists.lua

@@ -1,5 +1,5 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:maillists"
 
@@ -9,7 +9,7 @@ local maillists_formspec = "size[8,9;]" .. mail.theme .. [[
 		button[6,1.60;2,0.5;delete;]] .. S("Delete") .. [[]
 		button[6,8.25;2,0.5;back;]] .. S("Back") .. [[]
 		tablecolumns[color;text;text]
-		table[0,0;5.75,9;maillists;#999,]] .. S("Name") .. "," .. S("Note")
+		table[0,0;5.75,9;maillists;]] .. mail.get_color("header") .. "," .. S("Name") .. "," .. S("Note")
 
 function mail.show_maillists(name)
 	local formspec = { maillists_formspec }
@@ -19,14 +19,14 @@ function mail.show_maillists(name)
 		for _, maillist in ipairs(maillists) do
 			formspec[#formspec + 1] = ","
 			formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = "@" .. minetest.formspec_escape(maillist.name)
+			formspec[#formspec + 1] = "@" .. core.formspec_escape(maillist.name)
 			formspec[#formspec + 1] = ","
 			if maillist.desc ~= "" then
-				if string.len(maillist.desc) > 30 then
-					formspec[#formspec + 1] = minetest.formspec_escape(string.sub(maillist.desc, 1, 27))
+				if string.len(maillist.desc or "") > 30 then
+					formspec[#formspec + 1] = core.formspec_escape(string.sub(maillist.desc, 1, 27))
 					formspec[#formspec + 1] = "..."
 				else
-					formspec[#formspec + 1] = minetest.formspec_escape(maillist.desc)
+					formspec[#formspec + 1] = core.formspec_escape(maillist.desc)
 				end
 			else
 				formspec[#formspec + 1] = S("(No description)")
@@ -40,10 +40,10 @@ function mail.show_maillists(name)
 	else
 		formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No maillist") .. "]"
 	end
-	minetest.show_formspec(name, FORMNAME, table.concat(formspec, ""))
+	core.show_formspec(name, FORMNAME, table.concat(formspec, ""))
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
@@ -52,7 +52,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	local maillists = mail.get_maillists(name)
 
 	if fields.maillists then
-		local evt = minetest.explode_table_event(fields.maillists)
+		local evt = core.explode_table_event(fields.maillists)
 		mail.selected_idxs.maillists[name] = evt.row - 1
 		if evt.type == "DCL" and maillists[mail.selected_idxs.maillists[name]] then
 			local maillist = mail.get_maillist_by_name(name, maillists[mail.selected_idxs.maillists[name]].name)
@@ -85,7 +85,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			-- except if it was the last. Then determine the new last
 			local found = false
 			local last = nil
-			for k in mail.pairsByKeys(maillists) do
+			for k in mail.pairs_by_keys(maillists) do
 				if found then
 					mail.selected_idxs.maillists[name] = k
 					break

ui/message.lua

@@ -1,56 +1,94 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:message"
 
+local function interleave_msg(body)
+	return "> " .. (body or ""):gsub("\n", "\n> ")
+end
+
+
 function mail.show_message(name, id)
 	local message = mail.get_message(name, id)
+	if not message then
+		-- message not found or vanished
+		return
+	end
+
+	mail.selected_idxs.message[name] = id
 
 	local formspec = [[
-			size[8,9]
+			size[10,10]
 
-			box[0,0;7,1.9;#466432]
+			box[0,0;7,1.9;]] .. mail.get_color("highlighted") .. [[]
 
-			button[7.25,0.15;0.75,0.5;back;X]
+			button[9.25,0.15;0.75,0.5;back;X]
+			button[7.25,-0.07;2,1;receivers;]] .. S("Receivers") .. [[]
 
 			label[0.2,0.1;]] .. S("From") .. [[: %s]
 			label[0.2,0.5;]] .. S("To") .. [[: %s]
 			label[0.2,0.9;]] .. S("CC") .. [[: %s]
 			label[0.2,1.3;]] .. S("Date") .. [[: %s]
+			tooltip[0.2,1.3;4.8,0.4;]] .. mail.time_ago(message.time) .. [[]
 
 			label[0,2.1;]] .. S("Subject") .. [[: %s]
-			textarea[0.25,2.6;8,7.0;;;%s]
+			textarea[0.25,2.6;7.25,8.75;;;%s]
 
-			button[0,8.5;2,1;reply;]] .. S("Reply") .. [[]
-			button[2,8.5;2,1;replyall;]] .. S("Reply all") .. [[]
-			button[4,8.5;2,1;forward;]] .. S("Forward") .. [[]
-			button[6,8.5;2,1;delete;]] .. S("Delete") .. [[]
+			button[7.25,1.0;2.75,1;reply;]] .. S("Reply") .. [[]
+			button[7.25,1.8;2.75,1;replyall;]] .. S("Reply all") .. [[]
+			button[7.25,2.6;2.75,1;forward;]] .. S("Forward") .. [[]
+
+			button[7.25,3.6;2.75,1;markspam;]] .. S("Mark Spam") .. [[]
+			button[7.25,4.4;2.75,1;unmarkspam;]] .. S("Unmark Spam") .. [[]
+
+			button[7.25,5.4;2.75,1;togglemute;]] .. S("(Un)mute sender") .. [[]
+
+			box[7.25,6.4;2.5,2.75;]] .. mail.get_color("disabled") .. [[]
+
+			button[7.25,9.25;2.75,1;delete;]] .. S("Delete") .. [[]
+
+			tooltip[reply;]] .. S("Reply only to the sender") .. [[]
+			tooltip[replyall;]] .. S("Reply to all involved people") .. [[]
+			tooltip[forward;]] .. S("Transfer message to other people") .. [[]
 		]] .. mail.theme
 
-	local from = minetest.formspec_escape(message.from) or ""
-	local to = minetest.formspec_escape(message.to) or ""
-	local cc = minetest.formspec_escape(message.cc) or ""
+	local from = core.formspec_escape(message.from) or ""
+	local to = core.formspec_escape(message.to) or ""
+	if string.len(to) > 70 then to = string.sub(to, 1, 67) .. "..." end
+	local cc = core.formspec_escape(message.cc) or ""
+	if string.len(cc) > 50 then cc = string.sub(cc, 1, 47) .. "..." end
 	local date = type(message.time) == "number"
-		and minetest.formspec_escape(os.date("%Y-%m-%d %X", message.time)) or ""
-	local subject = minetest.formspec_escape(message.subject) or ""
-	local body = minetest.formspec_escape(message.body) or ""
+		and core.formspec_escape(os.date(mail.get_setting(name, "date_format"),
+		message.time+3600*mail.get_setting(name, "timezone_offset"))) or ""
+	local subject = core.formspec_escape(message.subject) or ""
+	local body = core.formspec_escape(message.body) or ""
 	formspec = string.format(formspec, from, to, cc, date, subject, body)
 
-	if not message.read then
+	if not message.read and mail.get_setting(name, "auto_marking_read") then
 		-- mark as read
 		mail.mark_read(name, id)
 	end
 
-	minetest.show_formspec(name, FORMNAME, formspec)
+	core.show_formspec(name, FORMNAME, formspec)
 end
 
 function mail.reply(name, message)
-	local replyfooter = "Type your reply here.\n\n--Original message follows--\n" ..message.body
-	mail.show_compose(name, message.from, "Re: "..message.subject, replyfooter)
+	if not message then
+		-- TODO: workaround for https://github.com/mt-mods/mail/issues/84
+		core.log("error", "[mail] reply called with nil message for player: " .. name)
+		core.log("error", "[mail] current mail-context: " .. dump(mail.selected_idxs))
+		return
+	end
+	mail.show_compose(name, message.from, "Re: "..message.subject, interleave_msg(message.body))
 end
 
 function mail.replyall(name, message)
-	local replyfooter = "Type your reply here.\n\n--Original message follows--\n" ..message.body
+	if not message then
+		-- TODO: workaround for https://github.com/mt-mods/mail/issues/84
+		core.log("error", "[mail] replyall called with nil message for player: " .. name)
+		core.log("error", "[mail] current mail-context: " .. dump(mail.selected_idxs))
+		return
+	end
 
 	-- new recipients are the sender plus the original recipients, minus ourselves
 	local recipients = message.to or ""
@@ -76,59 +114,61 @@ function mail.replyall(name, message)
 	end
 	cc = mail.concat_player_list(cc)
 
-	mail.show_compose(name, recipients, "Re: "..message.subject, replyfooter, cc)
+	mail.show_compose(name, recipients, "Re: "..message.subject, interleave_msg(message.body), cc)
 end
 
 function mail.forward(name, message)
-	local fwfooter = "Type your message here.\n\n--Original message follows--\n" .. (message.body or "")
-	mail.show_compose(name, "", "Fw: " .. (message.subject or ""), fwfooter)
+	mail.show_compose(name, "", "Fw: " .. (message.subject or ""), interleave_msg(message.body))
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
 
 	local name = player:get_player_name()
 
+	local message = mail.get_message(name, mail.selected_idxs.message[name])
+
 	if fields.back then
 		mail.show_mail_menu(name)
 		return true	-- don't uselessly set messages
 
 	elseif fields.reply then
-		local message = ""
-		if mail.selected_idxs.inbox[name] then
-			message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
-		elseif mail.selected_idxs.sent[name] then
-			message = mail.get_message(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
-		end
 		mail.reply(name, message)
 
 	elseif fields.replyall then
-		local message = ""
-		if mail.selected_idxs.inbox[name] then
-			message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
-		elseif mail.selected_idxs.sent[name] then
-			message = mail.get_message(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
-		end
 		mail.replyall(name, message)
 
 	elseif fields.forward then
-		local message = ""
-		if mail.selected_idxs.inbox[name] then
-			message = mail.get_message(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
-		elseif mail.selected_idxs.sent[name] then
-			message = mail.get_message(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
-		end
 		mail.forward(name, message)
 
+	elseif fields.markspam then
+		mail.mark_spam(name, message.id)
+
+	elseif fields.unmarkspam then
+		mail.unmark_spam(name, message.id)
+
+	elseif fields.togglemute then
+		local mutes = table.copy(mail.get_setting(name, "mute_list"))
+		local mute_indexof = table.indexof(mutes, message.from)
+		if mute_indexof == -1 then -- mute
+			table.insert(mutes, message.from)
+		else -- unmute
+			table.remove(mutes, mute_indexof)
+		end
+		mail.set_setting(name, "mute_list", mutes)
+
 	elseif fields.delete then
-		if mail.selected_idxs.inbox[name] then
-			mail.delete_mail(name, mail.selected_idxs.inbox[name][#mail.selected_idxs.inbox[name]])
-		elseif mail.selected_idxs.sent[name] then
-			mail.delete_mail(name, mail.selected_idxs.sent[name][#mail.selected_idxs.sent[name]])
+        if mail.get_setting(name, "trash_move_enable") and mail.selected_idxs.boxtab[name] ~= 4 then
+			mail.trash_mail(name, message.id)
+		else
+			mail.delete_mail(name, message.id, true)
 		end
 		mail.show_mail_menu(name)
+
+	elseif fields.receivers then
+		mail.show_receivers(name, message.id)
 	end
 
 	return true

ui/options.lua

@@ -0,0 +1,13 @@
+-- helper function for tabbed options
+
+function mail.show_options(playername)
+    local index = mail.selected_idxs.optionstab[playername] or 1
+    if not mail.selected_idxs.optionstab[playername] then
+        mail.selected_idxs.optionstab[playername] = 1
+    end
+    if index == 1 then
+        mail.show_settings(playername)
+    elseif index == 2 then
+        mail.show_about(playername)
+    end
+end

ui/outbox.lua

@@ -1,15 +1,41 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
-
-function mail.show_sent(name, sortfieldindex, sortdirection, filter)
-    sortfieldindex = tonumber(sortfieldindex or mail.selected_idxs.sortfield[name]) or 3
-    sortdirection = sortdirection or mail.selected_idxs.sortdirection[name] or "1"
+function mail.show_outbox(name, sortfieldindex, sortdirection, filter)
+    sortfieldindex = tonumber(sortfieldindex or mail.selected_idxs.sortfield[name])
+    or mail.get_setting(name, "defaultsortfield") or 3
+    sortdirection = tostring(sortdirection or mail.selected_idxs.sortdirection[name]
+    or mail.get_setting(name, "defaultsortdirection") or "1")
 	filter = filter or mail.selected_idxs.filter[name] or ""
-    mail.selected_idxs.sent[name] = mail.selected_idxs.sent[name] or {}
+    mail.selected_idxs.outbox[name] = mail.selected_idxs.outbox[name] or {}
 
-	local sent_formspec = "size[8.5,10;]" .. mail.theme .. [[
-		tabheader[0.3,1;boxtab;]] .. S("Inbox") .. "," .. S("Sent messages").. "," .. S("Drafts") .. [[;2;false;false]
+	local entry = mail.get_storage_entry(name)
+	local sortfield = ({"to","subject","time"})[sortfieldindex]
+    local messages = mail.sort_messages(entry.outbox, sortfield, sortdirection == "2", filter)
+
+    if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+        for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
+            local is_present = false
+            for _, msg in ipairs(messages) do
+                if msg.id == selected_msg then
+                    is_present = true
+                    break
+                end
+            end
+            if not is_present then
+                table.remove(mail.selected_idxs.outbox[name], i)
+            end
+        end
+    end
+
+    local trash_tab = ""
+    if mail.get_setting(name, "trash_move_enable") then
+        trash_tab = "," .. S("Trash")
+    end
+
+	local outbox_formspec = "size[8.5,11;]" .. mail.theme .. [[
+		tabheader[0.3,1;boxtab;]] ..
+		S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. trash_tab .. [[;2;false;false]
 
 		button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
 		button[6,0.95;2.5,0.5;read;]] .. S("Read") .. [[]
@@ -17,38 +43,41 @@ function mail.show_sent(name, sortfieldindex, sortdirection, filter)
 		button[6,2.45;2.5,0.5;replyall;]] .. S("Reply all") .. [[]
 		button[6,3.20;2.5,0.5;forward;]] .. S("Forward") .. [[]
 		button[6,3.95;2.5,0.5;delete;]] .. S("Delete") .. [[]
-		button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
-		button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
-		button[6,8.7;2.5,0.5;about;]] .. S("About") .. [[]
-		button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+		button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+		button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+        button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+		button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
-        dropdown[0,8.4;2,0.5;sortfield;]] ..
+        tooltip[reply;]] .. S("Reply only to the sender") .. [[]
+        tooltip[replyall;]] .. S("Reply to all involved people") .. [[]
+        tooltip[forward;]] .. S("Transfer message to other people") .. [[]
+
+        dropdown[0,9.5;2,0.5;sortfield;]] ..
         S("To") .. "," .. S("Subject") .. "," .. S("Date") .. [[;]] .. sortfieldindex .. [[;true]
-        dropdown[2.0,8.4;2,0.5;sortdirection;]] ..
+        dropdown[2.0,9.5;2,0.5;sortdirection;]] ..
         S("Ascending") .. "," .. S("Descending") .. [[;]] .. sortdirection .. [[;true]
-        field[4.25,8.85;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
-        button[5.14,8.52;0.85,0.5;search;Q]
+        field[4.25,9.95;1.4,0.5;filter;]] .. S("Filter") .. [[:;]] .. filter .. [[]
+        image_button[5.14,9.5;0.85,0.85;search.png;search;]
 
-        checkbox[0,9.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
+        checkbox[0,10.1;multipleselection;]] .. S("Allow multiple selection") .. [[;]] ..
         tostring(mail.selected_idxs.multipleselection[name]) .. [[]
-        label[0,9.65;]] .. tostring(#mail.selected_idxs.sent[name]) .. " " .. S("selected") .. [[]
-        button[3.5,9.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
+        label[0,10.65;]] ..
+        S("@1 of @2 selected", tostring(#mail.selected_idxs.outbox[name]), tostring(#messages)) .. [[]
+        button[3.5,10.5;2.5,0.5;selectall;]] .. S("(Un)select all") .. [[]
 
 		tablecolumns[color;text;text]
-		table[0,0.7;5.75,7.35;sent;#999,]] .. S("To") .. "," .. S("Subject")
-	local formspec = { sent_formspec }
-	local entry = mail.get_storage_entry(name)
-	local sortfield = ({"to","subject","time"})[sortfieldindex]
-    local messages = mail.sort_messages(entry.outbox, sortfield, sortdirection == "2", filter)
+        table[0,0.7;5.75,8.45;outbox;]] .. mail.get_color("header") .. "," .. S("To") .. "," .. S("Subject")
+	local formspec = { outbox_formspec }
 
 	mail.message_drafts[name] = nil
 
 	if #messages > 0 then
         for _, message in ipairs(messages) do
             local selected_id = 0
+            local displayed_color = {}
             -- check if message is in selection list and return its id
-            if mail.selected_idxs.sent[name] and #mail.selected_idxs.sent[name] > 0 then
-                for i, selected_msg in ipairs(mail.selected_idxs.sent[name]) do
+            if mail.selected_idxs.outbox[name] and #mail.selected_idxs.outbox[name] > 0 then
+                for i, selected_msg in ipairs(mail.selected_idxs.outbox[name]) do
                     if message.id == selected_msg then
                         selected_id = i
                         break
@@ -56,19 +85,23 @@ function mail.show_sent(name, sortfieldindex, sortdirection, filter)
                 end
             end
             if selected_id > 0 then
-                formspec[#formspec + 1] = ",#466432"
-            else
-				formspec[#formspec + 1] = ","
+                table.insert(displayed_color, "selected")
             end
+            formspec[#formspec + 1] = "," .. mail.get_color(displayed_color)
             formspec[#formspec + 1] = ","
-			formspec[#formspec + 1] = minetest.formspec_escape(message.to)
+			if string.len(message.to) > 20 then
+				formspec[#formspec + 1] = core.formspec_escape(string.sub(message.to, 1, 17))
+				formspec[#formspec + 1] = "..."
+			else
+				formspec[#formspec + 1] = core.formspec_escape(message.to)
+			end
             formspec[#formspec + 1] = ","
             if message.subject ~= "" then
                 if string.len(message.subject) > 30 then
-					formspec[#formspec + 1] = minetest.formspec_escape(string.sub(message.subject, 1, 27))
+                    formspec[#formspec + 1] = core.formspec_escape(string.sub(message.subject, 1, 27))
                     formspec[#formspec + 1] = "..."
                 else
-					formspec[#formspec + 1] = minetest.formspec_escape(message.subject)
+                    formspec[#formspec + 1] = core.formspec_escape(message.subject)
                 end
             else
                 formspec[#formspec + 1] = S("(No subject)")
@@ -78,5 +111,6 @@ function mail.show_sent(name, sortfieldindex, sortdirection, filter)
     else
         formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No mail") .. "]"
     end
-	minetest.show_formspec(name, "mail:sent", table.concat(formspec, ""))
+
+	core.show_formspec(name, "mail:outbox", table.concat(formspec, ""))
 end

ui/receivers.lua

@@ -0,0 +1,54 @@
+-- translation
+local S = core.get_translator("mail")
+
+local FORMNAME = "mail:receivers"
+
+function mail.show_receivers(name, id)
+	local message = mail.get_message(name, id)
+
+	local formspec = [[
+			size[8,6]
+
+			box[0,0;7,1.1;]] .. mail.get_color("highlighted") .. [[]
+
+			button[7.25,0.15;0.75,0.5;back;X]
+
+			label[0.2,0.1;]] .. S("From") .. [[: %s]
+			label[0.2,0.5;]] .. S("Date") .. [[: %s]
+
+			tablecolumns[color;text]
+			table[0,1.5;3.8,4.5;to;%s]
+
+			tablecolumns[color;text]
+			table[4,1.5;3.8,4.5;cc;%s]
+		]] .. mail.theme
+
+	local from = core.formspec_escape(message.from) or ""
+	local to = mail.parse_player_list(message.to or "")
+	local to_str = mail.get_color("header") .. "," .. S("To") .. ",,"
+	to_str = to_str .. table.concat(to, ",,")
+	local cc = mail.parse_player_list(message.cc or "")
+	local cc_str = mail.get_color("header") .. "," .. S("CC") .. ",,"
+	cc_str = cc_str .. table.concat(cc, ",,")
+	local date = type(message.time) == "number"
+		and core.formspec_escape(os.date(mail.get_setting(name, "date_format"), message.time)) or ""
+	formspec = string.format(formspec, from, date, to_str, cc_str)
+
+	core.show_formspec(name, FORMNAME, formspec)
+end
+
+core.register_on_player_receive_fields(function(player, formname, fields)
+	if formname ~= FORMNAME then
+		return
+	end
+
+	local name = player:get_player_name()
+
+	local message_id = mail.selected_idxs.message[name]
+
+	if fields.back then
+		mail.show_message(name, message_id)
+	end
+
+	return true
+end)

ui/select_contact.lua

@@ -1,19 +1,19 @@
 -- translation
-local S = minetest.get_translator("mail")
+local S = mail.S
 
 local FORMNAME = "mail:selectcontact"
 
 local select_contact_formspec = "size[8,9;]" .. mail.theme .. [[
     tablecolumns[color;text;text]
-    table[0,0;3.5,9;contacts;#999,]] .. S("Name") .. "," .. S("Note") .. [[%s]
+    table[0,0;3.5,9;contacts;]] .. mail.get_color("header") .. "," .. S("Name") .. "," .. S("Note") .. [[%s]
     button[3.55,2.00;1.75,0.5;toadd;→ ]] .. S("Add") .. [[]
     button[3.55,2.75;1.75,0.5;toremove;← ]] .. S("Remove") .. [[]
     button[3.55,6.00;1.75,0.5;ccadd;→ ]] .. S("Add") .. [[]
     button[3.55,6.75;1.75,0.5;ccremove;← ]] .. S("Remove") .. [[]
     tablecolumns[color;text;text]
-    table[5.15,0.0;2.75,4.5;to;#999,]] .. S("To") .. ":," .. S("Note") .. [[%s]
+    table[5.15,0.0;2.75,4.5;to;]] .. mail.get_color("header") .. "," .. S("To") .. ":," .. S("Note") .. [[%s]
     tablecolumns[color;text;text]
-    table[5.15,4.6;2.75,4.5;cc;#999,]] .. S("CC") .. ":," .. S("Note") .. [[%s]
+    table[5.15,4.6;2.75,4.5;cc;]] .. mail.get_color("header") .. "," .. S("CC") .. ":," .. S("Note") .. [[%s]
     button[3.55,8.25;1.75,0.5;back;]] .. S("Back") .. [[]
 ]]
 
@@ -39,10 +39,10 @@ function mail.show_select_contact(name, to, cc)
 		bcc = ""
 	end]]--
 	formspec = string.format(formspec, contacts, to, cc)--, bcc()
-	minetest.show_formspec(name, FORMNAME, formspec)
+	core.show_formspec(name, FORMNAME, formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, formname, fields)
+core.register_on_player_receive_fields(function(player, formname, fields)
 	if formname ~= FORMNAME then
 		return
 	end
@@ -60,7 +60,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		bcc = "bccremove"
 	}) do
 		if fields[k] then
-			local evt = minetest.explode_table_event(fields[k])
+			local evt = core.explode_table_event(fields[k])
 			mail.selected_idxs[k][name] = evt.row - 1
 			if evt.type == "DCL" and mail.selected_idxs[k][name] then
 				fields[action] = true
@@ -75,7 +75,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		if fields[v.."add"] then
 			update = true
 			if mail.selected_idxs.contacts[name] then
-				for k, contact, i in mail.pairsByKeys(contacts) do
+				for k, contact, i in mail.pairs_by_keys(contacts) do
 					if k == mail.selected_idxs.contacts[name] or i == mail.selected_idxs.contacts[name] then
 						local list = mail.parse_player_list(draft[v])
 						list[#list+1] = contact.name

ui/settings.lua

@@ -0,0 +1,264 @@
+-- translation
+local S = mail.S
+
+local FORMNAME = "mail:settings"
+
+local function get_settings_groups(parent)
+    -- generate ordered list of settings
+    local groups = {}
+    for _, g in ipairs(mail.settings_groups) do
+        if (g.parent or 0) == parent then
+            table.insert(groups, g)
+            -- insert sub groups just after the parent group
+            table.insert_all(groups, get_settings_groups(g.name))
+        end
+    end
+    return groups
+end
+
+local groups_labels = {}
+local ordered_groups = get_settings_groups(0)
+local tree_indent = 0
+for i, g in ipairs(ordered_groups) do
+    if not g.parent then tree_indent = 0
+    elseif i > 1 and g.parent == ordered_groups[i-1].name then tree_indent = tree_indent + 1
+    elseif i > 1 and g.parent ~= ordered_groups[i-1].parent then tree_indent = tree_indent - 1
+    end
+    table.insert(groups_labels, tostring(tree_indent))
+    table.insert(groups_labels, g.label)
+end
+local groups_str = table.concat(groups_labels, ",")
+
+function mail.show_settings(name)
+    local group_index = 1
+    mail.selected_idxs.settings_group[name] = mail.selected_idxs.settings_group[name] or mail.settings_groups[1].name
+
+    for i, g in ipairs(ordered_groups) do
+        if g.name == mail.selected_idxs.settings_group[name] then
+            group_index = i
+            break
+        end
+    end
+
+	local formspec = [[
+			size[10,6;]
+			tabheader[0,0;optionstab;]] .. S("Settings") .. "," .. S("About") .. [[;1;false;false]
+			button[9.35,0;0.75,0.5;back;X]
+
+			tablecolumns[tree;text]
+            table[0,0.775;3,4.5;groups;]] .. groups_str .. [[;]] .. group_index .. [[]
+
+			box[0,0;3,0.45;]] .. mail.get_color("highlighted") .. [[]
+			label[0.2,0;]] .. mail.settings_groups[group_index].label .. [[]
+
+            button[0,5.65;2.5,0.5;reset;]] .. S("Reset") .. [[]
+            button[7.5,5.65;2.5,0.5;save;]] .. S("Save") .. [[]
+            ]]
+
+    local x = 3.5
+    local y = -0.7
+    -- put settings in order
+    local ordered_settings = {}
+    for setting, data in pairs(mail.settings) do
+        if data.group == mail.selected_idxs.settings_group[name] then
+            table.insert(ordered_settings, setting)
+        end
+    end
+    table.sort(ordered_settings, function(a, b) return mail.settings[a].index < mail.settings[b].index end)
+    for _, setting in pairs(ordered_settings) do
+        local data = mail.settings[setting]
+        y = y + 0.4
+        local field_default = mail.selected_idxs[setting][name]
+        if field_default == nil then field_default = mail.get_setting(name, setting) end
+        if data.type == "bool" then
+            formspec = formspec .. [[
+            checkbox[]] .. x .. "," .. y .. ";" .. setting .. ";" ..
+            data.label .. ";" .. tostring(field_default) .. [[]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. [[
+                tooltip[]] .. setting .. ";" .. data.tooltip .. [[]
+                ]]
+            end
+        elseif data.type == "string" then
+            y = y + 1
+            formspec = formspec .. [[
+            field[]] .. x+0.275 .. "," .. y .. ";3,0.5;" .. setting .. ";" .. data.label .. [[;]] ..
+            field_default .. [[]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. "tooltip[" .. setting .. ";" .. data.tooltip .. "]"
+            end
+            if data.dataset then
+                local formatted_dataset = table.copy(data.dataset)
+                if data.format then
+                    for i, d in ipairs(formatted_dataset) do
+                        formatted_dataset[i] = data.format(d)
+                    end
+                end
+                local dataset_str = table.concat(formatted_dataset, ",")
+                local dataset_selected_id = 1
+                for i, d in ipairs(data.dataset) do
+                    if d == field_default then
+                        dataset_selected_id = i
+                        break
+                    end
+                end
+                formspec = formspec .. [[
+                dropdown[]] .. x+3 .. "," .. y-0.45 .. ";3,0.5;" .. "dataset_" .. setting .. ";" ..
+                dataset_str .. [[;]] .. dataset_selected_id .. [[;true]
+                ]]
+            end
+        elseif data.type == "number" then
+            y = y + 1
+            formspec = formspec .. [[
+            field[]] .. x+0.275 .. "," .. y .. ";3,0.5;" .. setting .. ";" .. data.label .. [[;]] ..
+            tostring(field_default) .. [[]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. "tooltip[" .. setting .. ";" .. data.tooltip .. "]"
+            end
+            if data.dataset then
+                local formatted_dataset = table.copy(data.dataset)
+                if data.format then
+                    for i, d in ipairs(formatted_dataset) do
+                        formatted_dataset[i] = data.format(d)
+                    end
+                end
+                local dataset_str = table.concat(formatted_dataset, ",")
+                local dataset_selected_id = 1
+                for i, d in ipairs(data.dataset) do
+                    if d == field_default then
+                        dataset_selected_id = i
+                        break
+                    end
+                end
+                formspec = formspec .. [[
+                dropdown[]] .. x+3 .. "," .. y-0.45 .. ";3,0.5;" .. "dataset_" .. setting .. ";" ..
+                dataset_str .. [[;]] .. dataset_selected_id .. [[;true]
+                ]]
+            end
+        elseif data.type == "index" then
+            y = y + 0.2
+            local formatted_dataset = table.copy(data.dataset)
+            if data.format then
+                for i, d in ipairs(formatted_dataset) do
+                    formatted_dataset[i] = data.format(d)
+                end
+            end
+            local dataset_str = table.concat(formatted_dataset, ",")
+            local dataset_selected_id = field_default
+            formspec = formspec .. [[
+            label[]] .. x .. "," .. y .. ";" .. data.label .. "]"
+            y = y + 0.4
+            formspec = formspec .. [[
+            dropdown[]] .. x .. "," .. y .. ";3,0.5;" .. setting .. ";" ..
+            dataset_str .. [[;]] .. dataset_selected_id .. [[;true]
+            ]]
+            if data.tooltip then
+                formspec = formspec .. [[
+                tooltip[]] .. setting .. ";" .. data.tooltip .. [[]
+                ]]
+            end
+            y = y + 0.2
+        elseif data.type == "list" then
+            y = y + 0.3
+            formspec = formspec .. [[
+            tablecolumns[color;text]
+            table[]] .. x-0.0125 .. "," .. y .. ";3.8125,2.5;" .. setting .. ";" ..
+            mail.get_color("header") .. "," .. data.label .. ",," ..
+            table.concat(field_default, ",,") .. "]"
+
+            y = y + 3.1
+            formspec = formspec .. [[
+            field[]] .. x+0.275 .. "," .. y .. ";2.975,0.5;field_" .. setting .. [[;;]
+            button[]] .. x+2.75 .. "," .. y-0.325 .. ";0.75,0.5;add_" .. setting .. [[;+]
+            button[]] .. x+3.25 .. "," .. y-0.325 .. ";0.75,0.5;remove_" .. setting .. [[;-]
+            ]]
+
+            if data.tooltip then
+                formspec = formspec .. "tooltip[field_" .. setting .. ";" .. data.tooltip .. "]"
+            end
+
+            y = y - 0.4
+        end
+    end
+    formspec = formspec .. mail.theme
+	core.show_formspec(name, FORMNAME, formspec)
+end
+
+core.register_on_player_receive_fields(function(player, formname, fields)
+	if formname ~= FORMNAME then
+		return
+	end
+
+    local playername = player:get_player_name()
+
+    for setting, data in pairs(mail.settings) do
+        if fields[setting] or fields["add_" .. setting] or fields["remove_" .. setting] then
+            if data.type == "bool" then
+                mail.selected_idxs[setting][playername] = fields[setting] == "true"
+                break
+            elseif data.type == "string" then
+                if data.dataset and fields["dataset_" .. setting] then
+                    mail.selected_idxs[setting][playername] = data.dataset[tonumber(fields["dataset_" .. setting])]
+                    mail.show_settings(playername)
+                end
+            elseif data.type == "number" then
+                if data.dataset and fields["dataset_" .. setting] then
+                    mail.selected_idxs[setting][playername] = data.dataset[tonumber(fields["dataset_" .. setting])]
+                    mail.show_settings(playername)
+                end
+            elseif data.type == "index" then
+                mail.selected_idxs[setting][playername] = tonumber(fields[setting])
+            elseif data.type == "list" then
+                mail.selected_idxs[setting][playername] = mail.selected_idxs[setting][playername] or
+                mail.get_setting(playername, setting)
+                if fields[setting] then
+                    local evt = core.explode_table_event(fields[setting])
+                    mail.selected_idxs["index_" .. setting][playername] = evt.row-1
+                elseif fields["add_" .. setting] then
+                    table.insert(mail.selected_idxs[setting][playername], fields["field_" .. setting])
+                elseif fields["remove_" .. setting] and mail.selected_idxs["index_" .. setting][playername] then
+                    table.remove(mail.selected_idxs[setting][playername],
+                    mail.selected_idxs["index_" .. setting][playername])
+                end
+                mail.show_settings(playername)
+            end
+        end
+    end
+
+	if fields.back then
+		mail.show_mail_menu(playername)
+		return
+
+    elseif fields.groups then
+        local evt = core.explode_table_event(fields.groups)
+        mail.selected_idxs.settings_group[playername] = mail.settings_groups[tonumber(evt.row)].name
+        mail.show_settings(playername)
+    elseif fields.optionstab == "1" then
+        mail.selected_idxs.optionstab[playername] = 1
+
+    elseif fields.optionstab == "2" then
+        mail.selected_idxs.optionstab[playername] = 2
+        mail.show_about(playername)
+        return
+
+    elseif fields.save then
+        -- save settings
+        for setting, _ in pairs(mail.settings) do
+            local new_value = mail.selected_idxs[setting][playername]
+            mail.selected_idxs[setting][playername] = nil
+            if new_value == nil then new_value = mail.get_setting(playername, setting) end
+            mail.set_setting(playername, setting, new_value)
+        end
+        -- update visuals
+        mail.hud_update(playername, mail.get_storage_entry(playername).inbox)
+        mail.show_settings(playername)
+
+    elseif fields.reset then
+        mail.reset_settings(playername)
+        mail.show_settings(playername)
+    end
+	return
+end)

ui/trash.lua

@@ -0,0 +1,53 @@
+-- translation
+local S = mail.S
+
+local trash_formspec = "size[8.5,11;]" .. mail.theme .. [[
+	tabheader[0.3,1;boxtab;]] ..
+	S("Inbox") .. "," .. S("Outbox").. "," .. S("Drafts") .. "," .. S("Trash") .. [[;4;false;false]
+
+	button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
+	button[6,0.95;2.5,0.5;read;]] .. S("Read") .. [[]
+	button[6,1.70;2.5,0.5;restore;]] .. S("Restore") .. [[]
+	button[6,2.45;2.5,0.5;delete;]] .. S("Delete") .. [[]
+	button[6,3.20;2.5,0.5;empty;]] .. S("Empty") .. [[]
+	button[6,8.0;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+	button[6,8.8;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+	button[6,9.7;2.5,0.5;options;]] .. S("Options") .. [[]
+	button_exit[6,10.5;2.5,0.5;quit;]] .. S("Close") .. [[]
+
+	tablecolumns[color;text;text]
+	table[0,0.7;5.75,10.35;trash;]] .. mail.get_color("header") .. "," .. S("From/To") .. "," .. S("Subject")
+
+
+function mail.show_trash(name)
+    local formspec = { trash_formspec }
+    local entry = mail.get_storage_entry(name)
+    local messages = entry.trash
+
+    if messages[1] then
+		for _, message in ipairs(messages) do
+			formspec[#formspec + 1] = ","
+			formspec[#formspec + 1] = ","
+			formspec[#formspec + 1] = core.formspec_escape(message.to)
+			formspec[#formspec + 1] = ","
+			if message.subject ~= "" then
+				if string.len(message.subject) > 30 then
+					formspec[#formspec + 1] = core.formspec_escape(string.sub(message.subject, 1, 27))
+					formspec[#formspec + 1] = "..."
+				else
+					formspec[#formspec + 1] = core.formspec_escape(message.subject)
+				end
+			else
+				formspec[#formspec + 1] = S("(No subject)")
+			end
+		end
+		if mail.selected_idxs.trash[name] then
+			formspec[#formspec + 1] = ";"
+			formspec[#formspec + 1] = tostring(mail.selected_idxs.trash[name] + 1)
+		end
+		formspec[#formspec + 1] = "]"
+	else
+		formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("Trash is empty") .. "]"
+	end
+    core.show_formspec(name, "mail:trash", table.concat(formspec, ""))
+end

util/colors.lua

@@ -0,0 +1,58 @@
+local generic_colors = {
+	header         = "#999999",
+	selected       = "#72FF63",
+	important      = "#FFD700",
+	additional     = "#CCCCDD",
+	highlighted    = "#608631",
+	new            = "#00F529",
+	warning        = "#FF8800",
+	disabled       = "#332222",
+	muted          = "#CCCCCC",
+}
+
+local function get_base_color(c)
+    return generic_colors[c] or ""
+end
+
+local function hex2rgb(hex)
+    hex = hex:gsub("#","")
+    return {
+        r = tonumber("0x" .. hex:sub(1,2)),
+        g = tonumber("0x" .. hex:sub(3,4)),
+        b = tonumber("0x" .. hex:sub(5,6))
+    }
+end
+
+local function rgb2hex(rgb)
+    return "#" .. string.format("%x", rgb.r) .. string.format("%x", rgb.g) .. string.format("%x", rgb.b)
+end
+
+local function rgb_colors_mix(colors)
+    local R = 0
+    local G = 0
+    local B = 0
+    for _, c in ipairs(colors) do
+        R = R + c.r
+        G = G + c.g
+        B = B + c.b
+    end
+    R = math.floor(R / #colors + 0.5)
+    G = math.floor(G / #colors + 0.5)
+    B = math.floor(B / #colors + 0.5)
+    return {r=R,g=G,b=B}
+end
+
+function mail.get_color(mix)
+    if type(mix) == "string" then
+        return get_base_color(mix)
+    elseif #mix == 1 then
+        return get_base_color(mix[1])
+    else
+        local colors2mix = {}
+        for _, c in ipairs(mix) do
+            colors2mix[#colors2mix+1] = hex2rgb(get_base_color(c))
+        end
+        local mixed_color = rgb_colors_mix(colors2mix)
+        return rgb2hex(mixed_color)
+    end
+end

util/contact.lua

@@ -0,0 +1,75 @@
+-- translation
+local S = mail.S
+
+function mail.compile_contact_list(name, selected, playernames)
+	-- TODO: refactor this - not just compiles *a* list, but *the* list for the contacts screen (too inflexible)
+	local formspec = {}
+	local contacts = mail.get_contacts(name)
+
+	if playernames == nil then
+		local length = 0
+		for k, contact, i, l in mail.pairs_by_keys(contacts) do
+			if i == 1 then length = l end
+			formspec[#formspec + 1] = ","
+			formspec[#formspec + 1] = ","
+			formspec[#formspec + 1] = core.formspec_escape(contact.name)
+			formspec[#formspec + 1] = ","
+			local note = contact.note
+			-- display an ellipsis if the note spans multiple lines
+			local idx = string.find(note, '\n')
+			if idx ~= nil then
+				note = string.sub(note, 1, idx-1) .. ' ...'
+			end
+			formspec[#formspec + 1] = core.formspec_escape(note)
+			if type(selected) == "string" then
+				if string.lower(selected) == k then
+					selected = i
+				end
+			end
+		end
+		if length > 0 then
+			if selected and type(selected) == "number" then
+				formspec[#formspec + 1] = ";"
+				formspec[#formspec + 1] = tostring(selected + 1)
+			end
+			formspec[#formspec + 1] = "]"
+		else
+			formspec[#formspec + 1] = "]label[2,4.5;" .. S("No contacts") .. "]"
+		end
+	else
+		if type(playernames) == "string" then
+			playernames = mail.parse_player_list(playernames)
+		end
+		for i,c in ipairs(playernames) do
+			formspec[#formspec + 1] = ","
+			formspec[#formspec + 1] = ","
+			formspec[#formspec + 1] = core.formspec_escape(c)
+			formspec[#formspec + 1] = ","
+			if contacts[string.lower(c)] == nil then
+				formspec[#formspec + 1] = ""
+			else
+				local note = contacts[string.lower(c)].note
+				-- display an ellipsis if the note spans multiple lines
+				local idx = string.find(note, '\n')
+				if idx ~= nil then
+					note = string.sub(note, 1, idx-1) .. ' ...'
+				end
+				formspec[#formspec + 1] = core.formspec_escape(note)
+			end
+			if not selected then
+				if type(selected) == "string" then
+					if string.lower(selected) == string.lower(c) then
+						selected = i
+					end
+				end
+			end
+		end
+		if #playernames > 0 and selected and type(selected) == "number" then
+			formspec[#formspec + 1] = ";"
+			formspec[#formspec + 1] = tostring(selected + 1)
+		end
+		formspec[#formspec + 1] = "]"
+	end
+	return table.concat(formspec, "")
+
+end

util/init.lua

@@ -0,0 +1,9 @@
+-- sub files
+local MP = core.get_modpath(core.get_current_modname())
+dofile(MP .. "/util/normalize.lua")
+dofile(MP .. "/util/colors.lua")
+dofile(MP .. "/util/contact.lua")
+dofile(MP .. "/util/settings.lua")
+dofile(MP .. "/util/spam.lua")
+dofile(MP .. "/util/time_ago.lua")
+dofile(MP .. "/util/uuid.lua")

util/normalize.lua

@@ -1,18 +1,44 @@
-local has_canonical_name = minetest.get_modpath("canonical_name")
+-- translation
+local S = mail.S
+
+local function recursive_expand_recipient_names(sender, list, is_toplevel, recipients, undeliverable)
+    for _, name in ipairs(list) do
+        if not (recipients[name] or undeliverable[name] or (name == sender and not is_toplevel)) then
+            local succ, value
+            for _, handler in ipairs(mail.registered_recipient_handlers) do
+                succ, value = handler(sender, name)
+                if succ ~= nil then
+                    break
+                end
+            end
+            local vtp = type(value)
+            if succ then
+                if vtp == "string" then
+                    recursive_expand_recipient_names(sender, {value}, is_toplevel, recipients, undeliverable)
+                elseif vtp == "table" then
+                    recursive_expand_recipient_names(sender, value, false, recipients, undeliverable)
+                elseif vtp == "function" then
+                    recipients[name] = value
+                else
+                    undeliverable[name] = S("The method of delivery to @1 is invalid.", name)
+                end
+            elseif succ == nil then
+                undeliverable[name] = S("The recipient @1 could not be identified.", name)
+            else
+                local reason = tostring(value) or S("@1 rejected your mail.", name)
+                undeliverable[name] = reason
+            end
+        end
+    end
+end
 
 --[[
 return the field normalized (comma separated, single space)
 and add individual player names to recipient list
 --]]
-function mail.normalize_players_and_add_recipients(field, recipients, undeliverable)
+function mail.normalize_players_and_add_recipients(sender, field, recipients, undeliverable)
     local order = mail.parse_player_list(field)
-    for _, recipient_name in ipairs(order) do
-        if not minetest.player_exists(recipient_name) then
-            undeliverable[recipient_name] = true
-        else
-            recipients[recipient_name] = true
-        end
-    end
+    recursive_expand_recipient_names(sender, order, true, recipients, undeliverable)
     return mail.concat_player_list(order)
 end
 
@@ -21,29 +47,23 @@ function mail.parse_player_list(field)
         return {}
     end
 
-    local separator = ", "
+    local separator = ",%s"
     local pattern = "([^" .. separator .. "]+)"
 
     -- get individual players
-    local player_set = {}
     local order = {}
-    field:gsub(pattern, function(player_name)
-        local lower = string.lower(player_name)
-        if not player_set[lower] then
-            if has_canonical_name then
-                player_name = canonical_name.get(player_name) or player_name
+    for name in field:gmatch(pattern) do
+        table.insert(order, name)
     end
 
-            player_set[lower] = player_name
-            order[#order+1] = player_name
-        end
-    end)
-
     return order
 end
 
 function mail.concat_player_list(order)
     -- turn list of players back into normalized string
+    if order == nil or #order == 0 then
+        return ""
+    end
     return table.concat(order, ", ")
 end
 

util/normalize.spec.lua

@@ -2,7 +2,7 @@
 mtt.register("util/normalize_players_and_add_recipients", function(callback)
     local recipients = {}
     local undeliverable = {}
-    local to = mail.normalize_players_and_add_recipients("player1,player2", recipients, undeliverable)
+    local to = mail.normalize_players_and_add_recipients("sender", "player1,player2", recipients, undeliverable)
 
     assert(to == "player1, player2")
     assert(not next(undeliverable))

util/settings.lua

@@ -0,0 +1,113 @@
+-- translation
+local S = mail.S
+
+mail.settings = {
+    chat_notifications = {
+        type = "bool", default = true, group = "notifications", index = 1,
+        label = S("Chat notifications"), tooltip = S("Receive a message in the chat when there is a new message")
+    },
+    onjoin_notifications = {
+        type = "bool", default = true, group = "notifications", index = 2,
+        label = S("On join notifications"), tooltip = S("Receive a message at login when inbox isn't empty") },
+    hud_notifications = {
+        type = "bool", default = true, group = "notifications", index = 3,
+        label = S("HUD notifications"), tooltip = S("Show an HUD notification when inbox isn't empty")
+    },
+    sound_notifications = {
+        type = "bool", default = true, group = "notifications", index = 4,
+        label = S("Sound notifications"), tooltip = S("Play a sound when there is a new message")
+    },
+    unreadcolorenable = {
+        type = "bool", default = true, group = "message_list", index = 1,
+        label = S("Show unread in different color")
+    },
+    cccolorenable = {
+        type = "bool", default = true, group = "message_list", index = 2,
+        label = S("Show CC/BCC in different color")
+    },
+    defaultsortfield = {
+        type = "index", default = 3, group = "box_fields", index = 1,
+        label = S("Default sorting field"), dataset = { S("From/To"), S("Subject"), S("Date") }
+    },
+    defaultsortdirection = {
+        type = "index", default = 1, group = "box_fields", index = 2,
+        label = S("Default sorting direction"), dataset = { S("Ascending"), S("Descending") }
+    },
+    trash_move_enable = {
+        type = "bool", default = true, group = "other", index = 1,
+        label = S("Move deleted messages to trash")
+    },
+    auto_marking_read = {
+        type = "bool", default = true, group = "other", index = 2,
+        label = S("Automatic marking read"), tooltip = S("Mark a message as read when opened")
+    },
+    date_format = {
+        type = "string", default = "%Y-%m-%d %X", group = "date_and_time", index = 3, label = S("Date format"),
+        dataset = {"%Y-%m-%d %X", "%d/%m/%y %X", "%A %d %B %Y %X"}, format = os.date
+    },
+    timezone_offset = {
+        type = "number", default = 0, group = "date_and_time", index = 4,
+        label = S("Timezone offset"), tooltip = S("Offset to add to server time."),
+    },
+    mute_list = {
+        type = "list", default = {}, group = "spam", index = 1,
+        label = S("Mute list")
+    },
+}
+
+mail.settings_groups = {
+    { name = "notifications", label = S("Notifications"), index = 1, parent = 0},
+    { name = "message_list",  label = S("Message list"),  index = 2, parent = 0},
+    { name = "box_fields",    label = S("Fields"),        index = 1, parent = "message_list"},
+    { name = "spam",          label = S("Spam"),          index = 3, parent = 0},
+    { name = "other",         label = S("Other"),         index = 4, parent = 0},
+    { name = "date_and_time", label = S("Date and Time"), index = 1, parent = "other"}
+}
+
+for s, d in pairs(mail.settings) do
+	mail.selected_idxs[s] = {}
+	if d.type == "list" then
+        mail.selected_idxs["index_" .. s] = {}
+    end
+end
+
+function mail.settings.mute_list.check(name, value)
+    local valid_players = {}
+    for _, p in ipairs(value) do
+        if p ~= name and core.player_exists(p) then
+            table.insert(valid_players, p)
+        end
+    end
+    return valid_players
+end
+
+function mail.settings.mute_list.sync(name)
+    if core.get_modpath("beerchat") then
+        local players = {}
+        for other_player, _ in core.get_auth_handler().iterate() do
+            if beerchat.has_player_muted_player(name, other_player) then
+                table.insert(players, other_player)
+            end
+        end
+        return players
+    end
+    return nil
+end
+
+function mail.settings.mute_list.transfer(name, value)
+    if core.get_modpath("beerchat") then
+        for other_player, _ in core.get_auth_handler().iterate() do -- unmute all
+            if not beerchat.execute_callbacks("before_mute", name, other_player) then
+                return false
+            end
+            core.get_player_by_name(name):get_meta():set_string(
+				"beerchat:muted:" .. other_player, "")
+        end
+        for _, other_player in ipairs(value) do -- then mute only players in table
+            core.get_player_by_name(name):get_meta():set_string(
+                    "beerchat:muted:" .. other_player, "true")
+        end
+        return true
+    end
+    return nil
+end

util/spam.lua

@@ -0,0 +1,39 @@
+local function caps_ratio(str)
+    local total_caps = 0
+    for i = 1, #str do -- iteration through each character
+        local c = str:sub(i,i)
+        if string.lower(c) ~= c then -- do not count digits as spam
+            total_caps = total_caps + 1
+        end
+    end
+    return total_caps/(#str or 1) -- avoid division by zero
+end
+
+local function words_ratio(str, ratio)
+    local words = {}
+    local split_str = str:split(" ")
+    for _, w in ipairs(split_str) do
+        if not words[w] then
+            words[w] = 0
+        else
+            words[w] = (words[w] or 0) + 1
+        end
+    end
+    for _, n in pairs(words) do
+        if n/#split_str >= ratio then
+            return true
+        end
+    end
+    return false
+end
+
+function mail.check_spam(message)
+    local spam_checks = {}
+    if caps_ratio(message.subject) == 1 or caps_ratio(message.body) > 0.4 then
+        table.insert(spam_checks, "caps")
+    end
+    if words_ratio(message.subject, 0.6) or words_ratio(message.body, 0.2) then
+        table.insert(spam_checks, "words")
+    end
+    return spam_checks
+end

util/time_ago.lua

@@ -0,0 +1,29 @@
+-- translation
+local S = mail.S
+
+function mail.time_ago(t)
+    local elapsed = os.time() - t
+    local str = ""
+
+    local time_units = {
+    { S("years"), 31536000 },
+    { S("months"), 2592000 },
+    { S("weeks"), 604800 },
+    { S("days"), 86400 },
+    { S("hours"), 3600 },
+    { S("minuts"), 60 },
+    { S("seconds"), 1 },
+    }
+
+    for _, u in ipairs(time_units) do
+        local n = math.modf(elapsed/u[2])
+        if n > 0 then
+            str = str .. " " .. n .. " " .. u[1]
+            elapsed = elapsed - n * u[2]
+        end
+    end
+
+    str = string.sub(str, 2, -1)
+
+    return S("@1 ago", str)
+end