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<?PHP // $Id: rsslib.php,v 1.3.2.1 2004/09/29 07:52:34 moodler Exp $
//This file adds support to rss feeds generation
//This function is the main entry point to glossary
//rss feeds generation. Foreach site glossary with rss enabled
//build one XML rss structure.
function glossary_rss_feeds() {
global $CFG;
$status = true;
//Check CFG->enablerssfeeds
if (empty($CFG->enablerssfeeds)) {
//Some debug...
if ($CFG->debug > 7) {
echo "DISABLED (admin variables)";
}
//Check CFG->glossary_enablerssfeeds
} else if (empty($CFG->glossary_enablerssfeeds)) {
//Some debug...
if ($CFG->debug > 7) {
echo "DISABLED (module configuration)";
}
//It's working so we start...
} else {
//Iterate over all glossaries
if ($glossaries = get_records("glossary")) {
foreach ($glossaries as $glossary) {
if (!empty($glossary->rsstype) && !empty($glossary->rssarticles) && $status) {
$filename = rss_file_name('glossary', $glossary); // RSS file
//First let's make sure there is work to do by checking existing files
if (file_exists($filename)) {
if ($lastmodified = filemtime($filename)) {
if (!glossary_rss_newstuff($glossary, $lastmodified)) {
continue;
}
}
}
//Ignore hidden forums
if (!instance_is_visible('glossary',$glossary)) {
if (file_exists($filename)) {
@unlink($filename);
}
continue;
}
mtrace("Updating RSS feed for $glossary->name, ID: $glossary->id");
//Some debug...
if ($CFG->debug > 7) {
echo "ID: $glossary->id->";
}
//Get the XML contents
$result = glossary_rss_feed($glossary);
//Save the XML contents to file
if (!empty($result)) {
$status = rss_save_file("glossary",$glossary,$result);
}
//Some debug...
if ($CFG->debug > 7) {
if (empty($result)) {
echo "(empty) ";
} else {
if (!empty($status)) {
echo "OK ";
} else {
echo "FAIL ";
}
}
}
}
}
}
}
return $status;
}
function glossary_rss_newstuff($glossary, $time) {
// If there is new stuff in the glossary since $time then this returns
// true. Otherwise it returns false.
if ($glossary->rsstype == 1) {
$items = glossary_rss_feed_withauthor($glossary, $time);
} else {
$items = glossary_rss_feed_withoutauthor($glossary, $time);
}
return (!empty($items));
}
//This function return the XML rss contents about the glossary record passed as parameter
//It returns false if something is wrong
function glossary_rss_feed($glossary) {
global $CFG;
$status = true;
//Check CFG->enablerssfeeds
if (empty($CFG->enablerssfeeds)) {
//Some debug...
if ($CFG->debug > 7) {
echo "DISABLED (admin variables)";
}
//Check CFG->glossary_enablerssfeeds
} else if (empty($CFG->glossary_enablerssfeeds)) {
//Some debug...
if ($CFG->debug > 7) {
echo "DISABLED (module configuration)";
}
//It's working so we start...
} else {
//Check the glossary has rss activated
if (!empty($glossary->rsstype) && !empty($glossary->rssarticles)) {
//Depending of the glossary->rsstype, we are going to execute, different sqls
if ($glossary->rsstype == 1) { //With author RSS
$items = glossary_rss_feed_withauthor($glossary);
} else { //Without author RSS
$items = glossary_rss_feed_withoutauthor($glossary);
}
//Now, if items, we begin building the structure
if (!empty($items)) {
//First all rss feeds common headers
$header = rss_standard_header($glossary->name,
$CFG->wwwroot."/mod/glossary/view.php?f=".$glossary->id,
$glossary->intro);
//Now all the rss items
if (!empty($header)) {
$articles = rss_add_items($items);
}
//Now all rss feeds common footers
if (!empty($header) && !empty($articles)) {
$footer = rss_standard_footer();
}
//Now, if everything is ok, concatenate it
if (!empty($header) && !empty($articles) && !empty($footer)) {
$status = $header.$articles.$footer;
} else {
$status = false;
}
} else {
$status = false;
}
}
}
return $status;
}
//This function returns "items" record array to be used to build the rss feed
//for a Type=with author glossary
function glossary_rss_feed_withauthor($glossary, $newsince=0) {
global $CFG;
$items = array();
if ($newsince) {
$newsince = " AND e.timecreated > '$newsince'";
} else {
$newsince = "";
}
if ($recs = get_records_sql ("SELECT e.id AS entryid,
e.concept AS entryconcept,
e.definition AS entrydefinition,
e.format AS entryformat,
e.timecreated AS entrytimecreated,
u.id AS userid,
u.firstname AS userfirstname,
u.lastname AS userlastname
FROM {$CFG->prefix}glossary_entries e,
{$CFG->prefix}user u
WHERE e.glossaryid = '$glossary->id' AND
u.id = e.userid AND
e.approved = 1 $newsince
ORDER BY e.timecreated desc")) {
//Are we just looking for new ones? If so, then return now.
if ($newsince) {
return true;
}
//Iterate over each entry to get glossary->rssarticles records
$articlesleft = $glossary->rssarticles;
$item = NULL;
$user = NULL;
foreach ($recs as $rec) {
unset($item);
unset($user);
$item->title = $rec->entryconcept;
$user->firstname = $rec->userfirstname;
$user->lastname = $rec->userlastname;
$item->author = fullname($user);
$item->pubdate = $rec->entrytimecreated;
$item->link = $CFG->wwwroot."/mod/glossary/showentry.php?courseid=".$glossary->course."&eid=".$rec->entryid;
$item->description = format_text($rec->entrydefinition,$rec->entryformat,NULL,$glossary->course);
$items[] = $item;
$articlesleft--;
if ($articlesleft < 1) {
break;
}
}
}
return $items;
}
//This function returns "items" record array to be used to build the rss feed
//for a Type=without author glossary
function glossary_rss_feed_withoutauthor($glossary, $newsince=0) {
global $CFG;
$items = array();
if ($newsince) {
$newsince = " AND e.timecreated > '$newsince'";
} else {
$newsince = "";
}
if ($recs = get_records_sql ("SELECT e.id AS entryid,
e.concept AS entryconcept,
e.definition AS entrydefinition,
e.format AS entryformat,
e.timecreated AS entrytimecreated,
u.id AS userid,
u.firstname AS userfirstname,
u.lastname AS userlastname
FROM {$CFG->prefix}glossary_entries e,
{$CFG->prefix}user u
WHERE e.glossaryid = '$glossary->id' AND
u.id = e.userid AND
e.approved = 1 $newsince
ORDER BY e.timecreated desc")) {
//Are we just looking for new ones? If so, then return now.
if ($newsince) {
return true;
}
//Iterate over each entry to get glossary->rssarticles records
$articlesleft = $glossary->rssarticles;
$item = NULL;
$user = NULL;
foreach ($recs as $rec) {
unset($item);
unset($user);
$item->title = $rec->entryconcept;
$user->firstname = $rec->userfirstname;
$user->lastname = $rec->userlastname;
//$item->author = fullname($user);
$item->pubdate = $rec->entrytimecreated;
$item->link = $CFG->wwwroot."/mod/glossary/showentry.php?courseid=".$glossary->course."&eid=".$rec->entryid;
$item->description = format_text($rec->entrydefinition,$rec->entryformat,NULL,$glossary->course);
$items[] = $item;
$articlesleft--;
if ($articlesleft < 1) {
break;
}
}
}
return $items;
}
?>
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