if (!($guestid = $DB->get_field('user', 'id', array('username' => 'guest', 'mnethostid' => $CFG->mnet_localhost_id)))) {
// guest does not exist yet, weird
rss_error('rsserror');
}
set_config('siteguest', $guestid);
}
$guesttoken = rss_get_token($CFG->siteguest);
//change forum to mod_forum (for example)
$componentname = 'mod_' . $componentname;
$url = $PAGE->url;
$url->set_slashargument("/{$context->id}/{$guesttoken}/{$componentname}/{$instanceid}/rss.xml");
//redirect to the 2.0 rss URL
redirect($url);
} else {
// Authenticate the user from the token
$userid = rss_get_userid_from_token($token);
if (!$userid) {
rss_error('rsserrorauth');
}
}
// Check the context actually exists
list($context, $course, $cm) = get_context_info_array($contextid);
$PAGE->set_context($context);
$user = get_complete_user_data('id', $userid);
// let enrol plugins deal with new enrolments if necessary
enrol_check_plugins($user);
\core\session\manager::set_user($user);
//for login and capability checks
try {
$autologinguest = true;
$setwantsurltome = true;
/**
* This function is the main entry point to pcast
* rss feeds generation.
*
* @global object $CFG
* @global object $DB
* @param string? $context
* @param array $args
* @return string (path)
*/
function pcast_rss_get_feed($context, $args)
{
global $CFG, $DB;
if (empty($CFG->pcast_enablerssfeeds)) {
debugging("DISABLED (module configuration)");
return null;
}
$status = true;
$token = clean_param($args[1], PARAM_ALPHANUM);
$pcastid = clean_param($args[3], PARAM_INT);
$groupid = clean_param($args[4], PARAM_INT);
$uservalidated = false;
//check capabilities
$cm = get_coursemodule_from_instance('pcast', $pcastid, 0, false, MUST_EXIST);
if ($cm) {
$modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
//context id from db should match the submitted one
if ($context->id == $modcontext->id && has_capability('mod/pcast:view', $modcontext)) {
$uservalidated = true;
}
}
//get userid from Token
$userid = rss_get_userid_from_token($token);
//Check group mode 0/1/2 (All participants)
$groupmode = groups_get_activity_groupmode($cm);
//Using Groups, check to see if user should see all participants
if ($groupmode == SEPARATEGROUPS) {
//User must have the capability to see all groups or be a member of that group
$members = get_enrolled_users($context, 'mod/pcast:write', $groupid, 'u.id', 'u.id ASC');
// Is a member of the current group
if (!isset($members[$userid]->id) or $members[$userid]->id != $userid) {
// Not a member of the group, can you see all groups (from CAPS)
if (!has_capability('moodle/site:accessallgroups', $context, $userid)) {
$uservalidated = false;
}
} else {
// Are a member of the current group
// Is the group #0 (Group 0 is all users)
if ($groupid == 0 and !has_capability('moodle/site:accessallgroups', $context, $userid)) {
$uservalidated = false;
}
}
}
if (!$uservalidated) {
return null;
}
// OK the user can view the RSS feed
$pcast = $DB->get_record('pcast', array('id' => $pcastid), '*', MUST_EXIST);
// Check to se if RSS is enabled
// NOTE: cannot use the rss_enabled_for_mod() function due to the functions internals and naming conflicts
if ($pcast->rssepisodes == 0 || empty($pcast->rssepisodes)) {
return null;
}
$sql = pcast_rss_get_sql($pcast);
//get the cache file info
$filename = rss_get_file_name($pcast, $sql);
//Append the GroupID to the end of the filename
$filename .= '_' . $groupid;
$cachedfilepath = rss_get_file_full_name('mod_pcast', $filename);
//Is the cache out of date?
$cachedfilelastmodified = 0;
if (file_exists($cachedfilepath)) {
$cachedfilelastmodified = filemtime($cachedfilepath);
}
//if the cache is more than 60 seconds old and there's new stuff
$dontrecheckcutoff = time() - 60;
if ($dontrecheckcutoff > $cachedfilelastmodified && pcast_rss_newstuff($pcast, $cachedfilelastmodified)) {
if (!($recs = $DB->get_records_sql($sql, array(), 0, $pcast->rssepisodes))) {
return null;
}
$items = array();
$formatoptions = new stdClass();
$formatoptions->trusttext = true;
foreach ($recs as $rec) {
$item = new stdClass();
$user = new stdClass();
$item->title = $rec->episodename;
$item->pcastid = $rec->pcastid;
$item->id = $rec->episodeid;
$item->userid = $rec->userid;
$item->course = $rec->course;
if ($pcast->displayauthor == 1) {
//With author
$user->firstname = $rec->userfirstname;
$user->lastname = $rec->userlastname;
$item->author = fullname($user);
}
$item->keywords = $rec->keywords;
$item->subtitle = $rec->subtitle;
$item->duration = $rec->duration;
$item->pubdate = $rec->episodetimecreated;
$item->link = new moodle_url('/mod/pcast/showepisode.php', array('eid' => $rec->episodeid));
$item->description = format_text($rec->episodesummary, 'HTML', NULL, $pcast->course);
// $item->description = strip_tags($rec->episodesummary);
if ($pcast->userscancategorize) {
//TODO: This is very inefficient (this generates 2 DB queries per entry)
$category = pcast_rss_category_lookup($rec);
$item->topcategory = $category->top->name;
$item->nestedcategory = $category->nested->name;
}
$items[] = $item;
}
//First all rss feeds common headers
$url = new moodle_url('/mod/pcast/view.php', array('id' => $pcast->id));
$header = pcast_rss_header(format_string($pcast->name, true), $url, format_string($pcast->intro, true), $pcast);
// Do we need iTunes tags?
if (isset($pcast->enablerssitunes) && $pcast->enablerssitunes == 1) {
$itunes = true;
} else {
$itunes = false;
}
//Now all the rss items
if (!empty($header)) {
$episodes = pcast_rss_add_items($context, $items, $itunes, $groupid);
}
//Now all rss feeds common footers
if (!empty($header) && !empty($episodes)) {
$footer = pcast_rss_footer();
}
//Now, if everything is ok, concatenate it
if (!empty($header) && !empty($episodes) && !empty($footer)) {
$rss = $header . $episodes . $footer;
//Save the XML contents to file.
$status = rss_save_file('mod_pcast', $filename, $rss);
}
}
if (!$status) {
$cachedfilepath = null;
}
return $cachedfilepath;
}