add "teleport_potion_enable_protection" setting for protection checks.

README.md

@@ -7,7 +7,7 @@ https://forum.minetest.net/viewtopic.php?f=9&t=9234
 
 Change log:
 
-- 1.5 - Use moveresult when throwing teleport potion, has switcharoo effect
+- 1.5 - Use moveresult when throwing teleport potion, has switcharoo effect, add "teleport_potion_enable_protection" to enable protection checks.
 - 1.4 - Change Pad texture so it's not as contrasting, check for attached player before tp.
 - 1.3 - Added some formspec checks and switch to enable old teleport pad texture (thanks mazes 80)
 - 1.2 - New teleport pad texture, code tweaks to work with minetest 5.x

init.lua

@@ -11,6 +11,7 @@
 local S = core.get_translator("teleport_potion")
 local mcl = core.get_modpath("mcl_core")
 local dist = tonumber(core.settings:get("map_generation_limit") or 31000)
+local use_protection = core.settings:get_bool("teleport_potion_enable_protection")
 
 -- creative check
 
@@ -85,6 +86,10 @@ local teleport_destinations = {}
 
 local function set_teleport_destination(playername, dest)
 
+	if use_protection and core.is_protected(dest, playername) then
+		core.chat_send_player(playername, S("Destination protected!")) ; return
+	end
+
 	teleport_destinations[playername] = dest
 
 	effect(dest, 20, "teleport_potion_particle.png", 0.5, 1.5, 1, 7, 15)
@@ -185,7 +190,17 @@ potion_entity.on_step = function(self, dtime, moveresult)
 		local oldpos = self.player:get_pos()
 
 		-- if we hit a player or mob then switch positions
-		local def = moveresult.collisions and moveresult.collisions[1]
+		local def = moveresult.collisions and moveresult.collisions[1] or {}
+		local playername = self.player:get_player_name() or ""
+
+		-- if protection enabled check if we can teleport or drop potion
+		if use_protection and core.is_protected(pos, playername) then
+
+			core.chat_send_player(playername, S("Destination protected!"))
+			core.add_item(pos, "teleport_potion:potion")
+
+			self.object:remove() ; return
+		end
 
 		if def.object then
 			def.object:set_pos(oldpos)
@@ -311,12 +326,8 @@ core.register_node("teleport_potion:pad", {
 	wield_image = teleport_pad_texture,
 	light_source = 5,
 	groups = {snappy = 3},
-	node_box = {
-		type = "fixed", fixed = {-0.5, -0.5, -0.5, 0.5, -6/16, 0.5}
-	},
-	selection_box = {
-		type = "fixed", fixed = {-0.5, -0.5, -0.5, 0.5, -6/16, 0.5}
-	},
+	node_box = {type = "fixed", fixed = {-0.5, -0.5, -0.5, 0.5, -6/16, 0.5}},
+	selection_box = {type = "fixed", fixed = {-0.5, -0.5, -0.5, 0.5, -6/16, 0.5}},
 
 	-- Save pointed nodes coordinates as destination for further portals
 	on_use = function(itemstack, user, pointed_thing)

settingtypes.txt

@@ -1,2 +1,5 @@
 # If enabled texture pad will use the old texture
 teleport_potion_use_old_texture (Use old texture for teleport pad) bool false
+
+# If enabled players cannot bookmark protected positions
+teleport_potion_enable_protection (Cannot set teleport to protected areas) bool false