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iImproved RSS
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moodler committed Mar 17, 2006
1 parent a848c48 commit 6619a7f
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116 changes: 76 additions & 40 deletions blog/rsslib.php
View file
Original file line number Diff line number Diff line change
Expand Up @@ -5,67 +5,103 @@

// This function returns the icon (from theme) with the link to rss/file.php
// needs some hacking to rss/file.php
function blog_rss_print_link($filtertype, $filterselect, $tooltiptext='') {
function blog_rss_print_link($filtertype, $filterselect, $tagid=0, $tooltiptext='') {

global $CFG, $USER;

static $pixpath = '';
static $rsspath = '';
if (empty($USER->id)) {
$userid = 1;
} else {
$userid = $USER->id;
}

switch ($filtertype) {
case 'site':
$path = SITEID.'/'.$userid.'/blog/site/'.SITEID;
break;
case 'course':
$path = $filterselect.'/'.$userid.'/blog/course/'.$filterselect;
break;
case 'group':
$path = SITEID.'/'.$userid.'/blog/group/'.$filterselect;
break;
case 'user':
$path = SITEID.'/'.$userid.'/blog/user/'.$filterselect;
break;
}

if ($tagid) {
$path .= '/'.$tagid;
}

$path .= '/rss.xml';
$rsspix = $CFG->pixpath .'/i/rss.gif';

if ($CFG->slasharguments) {
$rsspath = $CFG->wwwroot.'/rss/file.php/blog/'.$filtertype.'/'.$filterselect.'/rss.xml';
$path = $CFG->wwwroot.'/rss/file.php/'.$path;
} else {
$rsspath = $CFG->wwwroot.'/rss/file.php?file=/blog/'.$filtertype.'/'.$filterselect.'/rss.xml';
$path = $CFG->wwwroot.'/rss/file.php?file='.$path;
}
print '<div align="right"><a href="'. $rsspath .'"><img src="'. $rsspix .'" title="'. strip_tags($tooltiptext) .'" alt="" /></a></div>';
print '<div align="right"><a href="'. $path .'"><img src="'. $rsspix .'" title="'. strip_tags($tooltiptext) .'" alt="" /></a></div>';

}

// This file adds support to rss feeds generation
// This function is the main entry point to database module
// rss feeds generation. Foreach database with rss enabled
// build one XML rss structure.
function blog_rss_feeds() {

blog_site_feeds(); //generate site level feeds, last 20 entries?
blog_course_feeds(); //generate all course level feeds, last 20 entries
blog_group_feeds(); //generate all group level feeds, last 20 entries
blog_user_feeds(); //generate all user level feeds, last 20 entries

}

// Generate any blog RSS feed via one function (called by ../rss/file.php)
function blog_generate_rss_feed($type, $id, $tagid=0) {

$filename = blog_rss_file_name($type, $id, $tagid);

if (file_exists($filename)) {
if (filemtime($filename) + 3600 > time()) {
return $filename; /// It's already done so we return cached version
}
}

// Proceed to generate it

function blog_generate_rss_feed($type, $id, $tag='') {
switch ($type) {
case 'site':
return blog_site_feeds($tag);
if (blog_site_feeds($tagid)) {
return $filename;
}
break;
case 'course':
return blog_course_feed($id,$tag);
if ( blog_course_feed($id,$tagid)) {
return $filename;
}
break;
case 'group':
return blog_group_feed($id,$tag);
if ( blog_group_feed($id,$tagid)) {
return $filename;
}
break;
case 'user':
return blog_user_feed($id,$tag);
if ( blog_user_feed($id,$tagid)) {
return $filename;
}
break;
}

return false;
return false; // Couldn't find it or make it
}


/* Rss files for blogs
* 4 different ways to store feeds.
* site - $CFG->dataroot/rss/blogs/site/SITEID.xml
* course - $CFG->dataroot/rss/blogs/course/courseid.xml
* group - $CFG->dataroot/rss/blogs/group/groupid.xml
* user - $CFG->dataroot/rss/blogs/user/userid.xml
* site - $CFG->dataroot/rss/blog/site/SITEID.xml
* course - $CFG->dataroot/rss/blog/course/courseid.xml
* group - $CFG->dataroot/rss/blog/group/groupid.xml
* user - $CFG->dataroot/rss/blog/user/userid.xml
*/
function blog_rss_file_name($type, $id) {
function blog_rss_file_name($type, $id, $tagid=0) {
global $CFG;
$filename = "$CFG->dataroot/rss/blog/$type/$id/rss.xml";
return $filename;

if ($tagid) {
return "$CFG->dataroot/rss/blog/$type/$id/$tagid.xml";
} else {
return "$CFG->dataroot/rss/blog/$type/$id.xml";
}
}

//This function saves to file the rss feed specified in the parameters
Expand All @@ -80,7 +116,7 @@ function blog_rss_save_file($type, $id, $result) {
}

if ($status) {
$file = blog_rss_file_name($type, $id);
$file = blog_rss_file_name($type, $id, $tagid);
$rss_file = fopen($file, "w");
if ($rss_file) {
$status = fwrite ($rss_file, $result);
Expand All @@ -94,7 +130,7 @@ function blog_rss_save_file($type, $id, $result) {


// Only 1 view, site level feeds
function blog_site_feeds($tag='') {
function blog_site_feeds($tagid=0) {

global $CFG;
$status = true;
Expand All @@ -112,7 +148,7 @@ function blog_site_feeds($tag='') {
// It's working so we start...
else {
// Iterate over all data.
$filename = blog_rss_file_name('site', SITEID); // RSS file
$filename = blog_rss_file_name('site', SITEID, $tagid); // RSS file
// Get the most recent 20 posts
$sql = 'SELECT p.* FROM '.$CFG->prefix.'post p,
'.$CFG->prefix.'user u
Expand Down Expand Up @@ -179,7 +215,7 @@ function blog_course_feeds() {
}

// takes in course object from db
function blog_course_feed($course, $tag='') {
function blog_course_feed($course, $tagid=0) {

global $CFG;
$status = true;
Expand All @@ -197,7 +233,7 @@ function blog_course_feed($course, $tag='') {
// It's working so we start...
else {
// Iterate over all data.
$filename = blog_rss_file_name('course', $course->id); // RSS file
$filename = blog_rss_file_name('course', $course->id, $tagid); // RSS file
// Get the most recent 20 posts

$sql = '(SELECT p.* FROM '.$CFG->prefix.'post p, '
Expand Down Expand Up @@ -270,7 +306,7 @@ function blog_group_feeds() {
}

// takes in course object from db
function blog_group_feed($group, $tag='') {
function blog_group_feed($group, $tagid=0) {

global $CFG;
$status = true;
Expand All @@ -288,7 +324,7 @@ function blog_group_feed($group, $tag='') {
// It's working so we start...
else {
// Iterate over all data.
$filename = blog_rss_file_name('group', $group->id); // RSS file
$filename = blog_rss_file_name('group', $group->id, $tagid); // RSS file
// Get the most recent 20 posts

$sql= 'SELECT p.* FROM '.$CFG->prefix.'post p, '
Expand Down Expand Up @@ -354,7 +390,7 @@ function blog_user_feeds() {
}

// takes in course object from db
function blog_user_feed($user, $tag='') {
function blog_user_feed($user, $tagid=0) {

global $CFG;
$status = true;
Expand All @@ -372,7 +408,7 @@ function blog_user_feed($user, $tag='') {
// It's working so we start...
else {
// Iterate over all data.
$filename = blog_rss_file_name('user', $user->id); // RSS file
$filename = blog_rss_file_name('user', $user->id, $tagid); // RSS file
// Get the most recent 20 posts

$sql = 'SELECT p.* FROM '.$CFG->prefix.'post p, '
Expand Down
28 changes: 9 additions & 19 deletions rss/file.php
View file
Original file line number Diff line number Diff line change
Expand Up @@ -31,8 +31,6 @@
// extract relative path components
$args = explode('/', trim($relativepath, '/'));



if (count($args) < 5) {
rss_not_found();
}
Expand All @@ -46,7 +44,9 @@
if ($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
$tagid = (int)$args[5];
} else {
$tagid = 0;
}
} else {
$instance = (int)$instance; // we know it's an id number
Expand Down Expand Up @@ -81,31 +81,21 @@
}

//Check for "security" if the course is hidden or the activity is hidden
if ((!$course->visible || !$cm->visible) && (!$isteacher)) {
if (!$isblog and (!$course->visible || !$cm->visible) && (!$isteacher)) {
rss_not_found();
}

//Work out the filename of the RSS file
if ($isblog) {
if (empty($tag)) {
$pathname = $CFG->dataroot.'/rss/blog/'.$instance.'/'.$blogid.'.xml';
} else {
$pathname = $CFG->dataroot.'/rss/blog/'.$instance.'/'.$blogid.'/'.$tag.'.xml';
}
require_once($CFG->dirroot.'/blog/rsslib.php');
$pathname = blog_generate_rss_feed($instance, $blogid, $tagid);
} else {
$pathname = $CFG->dataroot.'/rss/'.$modulename.'/'.$instance.'.xml';
}

//Check that file exists
if (!file_exists($pathname)) {
if ($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();
}
rss_not_found();
}

//Send it to user!
Expand Down

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