From a848c48cf3ec4f56768782373b35535afc1b5782 Mon Sep 17 00:00:00 2001
From: moodler <moodler>
Date: Fri, 17 Mar 2006 09:11:06 +0000
Subject: [PATCH] Just pushing the RSS a bit further, it's not tested properly
 yet

---
 blog/rsslib.php | 28 ++++++++++++++++++++++++----
 rss/file.php    | 49 ++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 60 insertions(+), 17 deletions(-)

diff --git a/blog/rsslib.php b/blog/rsslib.php
index bc43a1c858..5e6351180e 100755
--- a/blog/rsslib.php
+++ b/blog/rsslib.php
@@ -35,6 +35,26 @@
         
     }
 
+
+    function blog_generate_rss_feed($type, $id, $tag='') {
+        switch ($type) {
+           case 'site':
+               return blog_site_feeds($tag);
+           break;
+           case 'course':
+               return blog_course_feed($id,$tag);
+           break;
+           case 'group':
+               return blog_group_feed($id,$tag);
+           break;
+           case 'user':
+               return blog_user_feed($id,$tag);
+           break;
+        }
+
+        return false;
+    }
+
     /* Rss files for blogs
      * 4 different ways to store feeds.
      * site - $CFG->dataroot/rss/blogs/site/SITEID.xml
@@ -74,7 +94,7 @@
      
     
     // Only 1 view, site level feeds
-    function blog_site_feeds() {
+    function blog_site_feeds($tag='') {
 
         global $CFG;
         $status = true;
@@ -159,7 +179,7 @@
     }
 
     // takes in course object from db
-    function blog_course_feed($course) {
+    function blog_course_feed($course, $tag='') {
 
         global $CFG;
         $status = true;
@@ -250,7 +270,7 @@
     }
 
     // takes in course object from db
-    function blog_group_feed($group) {
+    function blog_group_feed($group, $tag='') {
 
         global $CFG;
         $status = true;
@@ -334,7 +354,7 @@
     }
 
     // takes in course object from db
-    function blog_user_feed($user) {
+    function blog_user_feed($user, $tag='') {
 
         global $CFG;
         $status = true;
diff --git a/rss/file.php b/rss/file.php
index 1d3d9cfa1e..19c2640daf 100644
--- a/rss/file.php
+++ b/rss/file.php
@@ -31,32 +31,42 @@
     // extract relative path components
     $args = explode('/', trim($relativepath, '/'));
 
-    $isblog = ($args[0] == 'blog');
 
-    $needcourse = !$isblog;
 
-    if (count($args) < 5 && !$isblog) {
+    if (count($args) < 5) {
         rss_not_found();
     }
 
     $courseid   = (int)$args[0];
     $userid     = (int)$args[1];
     $modulename = clean_param($args[2], PARAM_FILE);
-    $instance   = (int)$args[3];
+    $instance   = $args[3];
     $filename   = 'rss.xml';
 
-    if ($needcourse and (!$course = get_record('course', 'id', $courseid))) {
+    if ($isblog = $modulename == 'blog') {
+       $blogid   = (int)$args[4];  // could be groupid / courseid  / userid  depending on $instance
+       if ($args[5] != 'rss.xml') {
+           $tag   = clean_param($args[5], PARAM_FILE);  // could be groupid / courseid  / userid  depending on $instance
+       }
+    } else {
+        $instance = (int)$instance;  // we know it's an id number
+    }
+
+
+    if (!$course = get_record('course', 'id', $courseid)) {
         rss_not_found();
     }
 
     //Check name of module
-    $mods = get_list_of_plugins("mod");
-    if ($needcourse and !in_array(strtolower($modulename), $mods)) {
-        rss_not_found();
+    if (!$isblog) {
+        $mods = get_list_of_plugins("mod");
+        if (!in_array(strtolower($modulename), $mods)) {
+            rss_not_found();
+        }
     }
 
     //Get course_module to check it's visible
-    if ($needcourse && (!$cm = get_coursemodule_from_instance($modulename,$instance,$courseid)) ) {
+    if (!$isblog && (!$cm = get_coursemodule_from_instance($modulename,$instance,$courseid)) ) {
         rss_not_found();
     }
 
@@ -65,24 +75,37 @@
 
     //Check for "security" if !course->guest or course->password
     if ($course->id != SITEID) {
-        if ($needcourse and ((!$course->guest || $course->password) && (!($isstudent || $isteacher)))) {
+        if ((!$course->guest || $course->password) && (!($isstudent || $isteacher))) {
             rss_not_found();
         }
     }
 
     //Check for "security" if the course is hidden or the activity is hidden
-    if ($needcourse and ((!$course->visible || !$cm->visible) && (!$isteacher))) {
+    if ((!$course->visible || !$cm->visible) && (!$isteacher)) {
         rss_not_found();
     }
 
     if ($isblog) {
-        $pathname = $CFG->dataroot.'/rss/'.$relativepath;
+        if (empty($tag)) {
+            $pathname = $CFG->dataroot.'/rss/blog/'.$instance.'/'.$blogid.'.xml';
+        } else {
+            $pathname = $CFG->dataroot.'/rss/blog/'.$instance.'/'.$blogid.'/'.$tag.'.xml';
+        }
     } else {
         $pathname = $CFG->dataroot.'/rss/'.$modulename.'/'.$instance.'.xml';
     }
     //Check that file exists
     if (!file_exists($pathname)) {
-        rss_not_found();
+        if ($isblog) {
+            if (filemtime($pathname) + 3600 < time()) {
+                require_once($CFG->dirroot.'/blog/rsslib.php');
+                if (!blog_generate_rss_feed($instance, $blogid)) {
+                   rss_not_found();
+                }
+            }
+        } else {
+            rss_not_found();
+        }
     }
 
     //Send it to user!
-- 
2.39.5