From 56964ec45f1fda12d44bb012c62efe26fcd77f47 Mon Sep 17 00:00:00 2001
From: Las Zenow <zenow@riseup.net>
Date: Sat, 31 Aug 2013 00:38:32 +0200
Subject: [PATCH] Add rss feed

---
 img/feed.png             | Bin 0 -> 868 bytes
 search.go                |   8 +++++++-
 template.go              |  16 ++++++++++++++++
 templates/header.html    |   1 +
 templates/index.html     |   2 +-
 templates/search.html    |   2 +-
 templates/search_rss.xml |  32 ++++++++++++++++++++++++++++++++
 7 files changed, 58 insertions(+), 3 deletions(-)
 create mode 100644 img/feed.png
 create mode 100644 templates/search_rss.xml

diff --git a/img/feed.png b/img/feed.png
new file mode 100644
index 0000000000000000000000000000000000000000..80ccac8e8c5b24161acd53819d53132364775136
GIT binary patch
literal 868
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al+3hB+!|&S-%|o=VDNPHb6Mw<&;$TulAO>0

literal 0
HcmV?d00001

diff --git a/search.go b/search.go
index 61e20e7..dbfd040 100644
--- a/search.go
+++ b/search.go
@@ -62,5 +62,11 @@ func searchHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
 	if page > 0 {
 		data.Prev = "/search/?q=" + req + "&p=" + strconv.Itoa(page-1)
 	}
-	loadTemplate(w, "search", data)
+
+	format := r.Form["fmt"]
+	if (len(format) > 0) && (format[0] == "rss") {
+		loadTxtTemplate(w, "search_rss.xml", data)
+	} else {
+		loadTemplate(w, "search", data)
+	}
 }
diff --git a/template.go b/template.go
index b5b6cd7..1a64b0b 100644
--- a/template.go
+++ b/template.go
@@ -5,7 +5,11 @@ import (
 	"net/http"
 )
 
+import txt_tmpl "text/template"
+
 type Status struct {
+	BaseURL string
+	FullURL string
 	Search  string
 	User    string
 	IsAdmin bool
@@ -22,6 +26,8 @@ func GetStatus(w http.ResponseWriter, r *http.Request) Status {
 	var s Status
 	sess := GetSession(r)
 	sess.Save(w, r)
+	s.BaseURL = "http://" + r.Host
+	s.FullURL = s.BaseURL + r.RequestURI
 	s.User = sess.User
 	s.IsAdmin = sess.IsAdmin()
 	s.Notif = sess.Notif
@@ -53,3 +59,13 @@ func loadTemplate(w http.ResponseWriter, tmpl string, data interface{}) {
 		return
 	}
 }
+
+var txt_templates = txt_tmpl.Must(txt_tmpl.ParseFiles(TEMPLATE_PATH + "search_rss.xml"))
+
+func loadTxtTemplate(w http.ResponseWriter, tmpl string, data interface{}) {
+	err := txt_templates.ExecuteTemplate(w, tmpl, data)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
diff --git a/templates/header.html b/templates/header.html
index d1bb60e..67a45d7 100644
--- a/templates/header.html
+++ b/templates/header.html
@@ -6,6 +6,7 @@
 	<meta name="viewport" content="width=device-width, initial-scale=1.0">
 	<link href="/css/bootstrap-responsive.min.css" rel="stylesheet">
 	<link href="/css/custom.css" rel="stylesheet">
+	<link rel="alternate" type="application/rss+xml" title="Imperial Library of Trantor" href="/search/?fmt=rss&q={{.Search}}" />
 	<title>Imperial Library of Trantor</title>
 	<script src="/js/jquery.js"></script>
 </head>
diff --git a/templates/index.html b/templates/index.html
index cd0f7a5..9a5ddee 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -8,7 +8,7 @@
 
 <div class="row">
 <div class="span8">
-	<h4>Last books added:</h4>
+	<h4>Last books added: <a href="/search/?fmt=rss&q="><img src="/img/feed.png"/></a></h4>
 </div>
 <div class="span4">
 	<p class="pull-right">{{.Count}} books</p>
diff --git a/templates/search.html b/templates/search.html
index ec172d8..cb446d6 100644
--- a/templates/search.html
+++ b/templates/search.html
@@ -1,6 +1,6 @@
 {{template "header.html" .S}}
 
-<p class="centered">Found {{.Found}} books. Page {{.Page}}</p>
+<p class="centered">Found {{.Found}} books. Page {{.Page}} <a href="/search/?fmt=rss&q={{.S.Search}}"><img src="/img/feed.png"/></a></p>
 
 <ul class="pager">
 {{if .Prev}}
diff --git a/templates/search_rss.xml b/templates/search_rss.xml
new file mode 100644
index 0000000..3effdad
--- /dev/null
+++ b/templates/search_rss.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<rss version="2.0">
+<channel>
+{{with .S}}
+ <title>Imperial Library of Trantor</title>
+{{if .Search}}
+ <description>Book search: {{.Search}}</description>
+{{else}}
+ <description>Last books added</description>
+{{end}}
+ <link>{{.BaseURL}}</link>
+{{end}}
+ 
+{{$baseURL := .S.BaseURL}}
+{{range .Books}}
+ <item>
+  <title>{{.Title}} - {{index .Author 0}}</title>
+  <description>{{.Description}}</description>
+  <link>{{$baseURL}}/book/{{.Id}}</link>
+{{if .Isbn}}
+  <guid isPermaLink="false">ISBN: {{.Isbn}}</guid>
+{{end}}
+{{range .Subject}}
+  {{if .}}
+  <category>{{.}}</category>
+  {{end}}
+{{end}}
+ </item>
+{{end}}
+ 
+</channel>
+</rss>