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lib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* @package mod
* @subpackage forum
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/** Include required files */
require_once($CFG->libdir.'/filelib.php');
require_once($CFG->libdir.'/eventslib.php');
require_once($CFG->dirroot.'/user/selector/lib.php');
require_once($CFG->dirroot.'/mod/forum/post_form.php');
/// CONSTANTS ///////////////////////////////////////////////////////////
define('FORUM_MODE_FLATOLDEST', 1);
define('FORUM_MODE_FLATNEWEST', -1);
define('FORUM_MODE_THREADED', 2);
define('FORUM_MODE_NESTED', 3);
define('FORUM_CHOOSESUBSCRIBE', 0);
define('FORUM_FORCESUBSCRIBE', 1);
define('FORUM_INITIALSUBSCRIBE', 2);
define('FORUM_DISALLOWSUBSCRIBE',3);
define('FORUM_TRACKING_OFF', 0);
define('FORUM_TRACKING_OPTIONAL', 1);
define('FORUM_TRACKING_ON', 2);
if (!defined('FORUM_CRON_USER_CACHE')) {
/** Defines how many full user records are cached in forum cron. */
define('FORUM_CRON_USER_CACHE', 5000);
}
/// STANDARD FUNCTIONS ///////////////////////////////////////////////////////////
/**
* Given an object containing all the necessary data,
* (defined by the form in mod_form.php) this function
* will create a new instance and return the id number
* of the new instance.
*
* @param stdClass $forum add forum instance
* @param mod_forum_mod_form $mform
* @return int intance id
*/
function forum_add_instance($forum, $mform = null) {
global $CFG, $DB;
$forum->timemodified = time();
if (empty($forum->assessed)) {
$forum->assessed = 0;
}
if (empty($forum->ratingtime) or empty($forum->assessed)) {
$forum->assesstimestart = 0;
$forum->assesstimefinish = 0;
}
$forum->id = $DB->insert_record('forum', $forum);
$modcontext = context_module::instance($forum->coursemodule);
if ($forum->type == 'single') { // Create related discussion.
$discussion = new stdClass();
$discussion->course = $forum->course;
$discussion->forum = $forum->id;
$discussion->name = $forum->name;
$discussion->assessed = $forum->assessed;
$discussion->message = $forum->intro;
$discussion->messageformat = $forum->introformat;
$discussion->messagetrust = trusttext_trusted(context_course::instance($forum->course));
$discussion->mailnow = false;
$discussion->groupid = -1;
$message = '';
$discussion->id = forum_add_discussion($discussion, null, $message);
if ($mform and $draftid = file_get_submitted_draft_itemid('introeditor')) {
// Ugly hack - we need to copy the files somehow.
$discussion = $DB->get_record('forum_discussions', array('id'=>$discussion->id), '*', MUST_EXIST);
$post = $DB->get_record('forum_posts', array('id'=>$discussion->firstpost), '*', MUST_EXIST);
$options = array('subdirs'=>true); // Use the same options as intro field!
$post->message = file_save_draft_area_files($draftid, $modcontext->id, 'mod_forum', 'post', $post->id, $options, $post->message);
$DB->set_field('forum_posts', 'message', $post->message, array('id'=>$post->id));
}
}
if ($forum->forcesubscribe == FORUM_INITIALSUBSCRIBE) {
$users = forum_get_potential_subscribers($modcontext, 0, 'u.id, u.email');
foreach ($users as $user) {
forum_subscribe($user->id, $forum->id);
}
}
forum_grade_item_update($forum);
return $forum->id;
}
/**
* Given an object containing all the necessary data,
* (defined by the form in mod_form.php) this function
* will update an existing instance with new data.
*
* @global object
* @param object $forum forum instance (with magic quotes)
* @return bool success
*/
function forum_update_instance($forum, $mform) {
global $DB, $OUTPUT, $USER;
$forum->timemodified = time();
$forum->id = $forum->instance;
if (empty($forum->assessed)) {
$forum->assessed = 0;
}
if (empty($forum->ratingtime) or empty($forum->assessed)) {
$forum->assesstimestart = 0;
$forum->assesstimefinish = 0;
}
$oldforum = $DB->get_record('forum', array('id'=>$forum->id));
// MDL-3942 - if the aggregation type or scale (i.e. max grade) changes then recalculate the grades for the entire forum
// if scale changes - do we need to recheck the ratings, if ratings higher than scale how do we want to respond?
// for count and sum aggregation types the grade we check to make sure they do not exceed the scale (i.e. max score) when calculating the grade
if (($oldforum->assessed<>$forum->assessed) or ($oldforum->scale<>$forum->scale)) {
forum_update_grades($forum); // recalculate grades for the forum
}
if ($forum->type == 'single') { // Update related discussion and post.
$discussions = $DB->get_records('forum_discussions', array('forum'=>$forum->id), 'timemodified ASC');
if (!empty($discussions)) {
if (count($discussions) > 1) {
echo $OUTPUT->notification(get_string('warnformorepost', 'forum'));
}
$discussion = array_pop($discussions);
} else {
// try to recover by creating initial discussion - MDL-16262
$discussion = new stdClass();
$discussion->course = $forum->course;
$discussion->forum = $forum->id;
$discussion->name = $forum->name;
$discussion->assessed = $forum->assessed;
$discussion->message = $forum->intro;
$discussion->messageformat = $forum->introformat;
$discussion->messagetrust = true;
$discussion->mailnow = false;
$discussion->groupid = -1;
$message = '';
forum_add_discussion($discussion, null, $message);
if (! $discussion = $DB->get_record('forum_discussions', array('forum'=>$forum->id))) {
print_error('cannotadd', 'forum');
}
}
if (! $post = $DB->get_record('forum_posts', array('id'=>$discussion->firstpost))) {
print_error('cannotfindfirstpost', 'forum');
}
$cm = get_coursemodule_from_instance('forum', $forum->id);
$modcontext = context_module::instance($cm->id, MUST_EXIST);
$post = $DB->get_record('forum_posts', array('id'=>$discussion->firstpost), '*', MUST_EXIST);
$post->subject = $forum->name;
$post->message = $forum->intro;
$post->messageformat = $forum->introformat;
$post->messagetrust = trusttext_trusted($modcontext);
$post->modified = $forum->timemodified;
$post->userid = $USER->id; // MDL-18599, so that current teacher can take ownership of activities.
if ($mform and $draftid = file_get_submitted_draft_itemid('introeditor')) {
// Ugly hack - we need to copy the files somehow.
$options = array('subdirs'=>true); // Use the same options as intro field!
$post->message = file_save_draft_area_files($draftid, $modcontext->id, 'mod_forum', 'post', $post->id, $options, $post->message);
}
$DB->update_record('forum_posts', $post);
$discussion->name = $forum->name;
$DB->update_record('forum_discussions', $discussion);
}
$DB->update_record('forum', $forum);
$modcontext = context_module::instance($forum->coursemodule);
if (($forum->forcesubscribe == FORUM_INITIALSUBSCRIBE) && ($oldforum->forcesubscribe <> $forum->forcesubscribe)) {
$users = forum_get_potential_subscribers($modcontext, 0, 'u.id, u.email', '');
foreach ($users as $user) {
forum_subscribe($user->id, $forum->id);
}
}
forum_grade_item_update($forum);
return true;
}
/**
* Given an ID of an instance of this module,
* this function will permanently delete the instance
* and any data that depends on it.
*
* @global object
* @param int $id forum instance id
* @return bool success
*/
function forum_delete_instance($id) {
global $DB;
if (!$forum = $DB->get_record('forum', array('id'=>$id))) {
return false;
}
if (!$cm = get_coursemodule_from_instance('forum', $forum->id)) {
return false;
}
if (!$course = $DB->get_record('course', array('id'=>$cm->course))) {
return false;
}
$context = context_module::instance($cm->id);
// now get rid of all files
$fs = get_file_storage();
$fs->delete_area_files($context->id);
$result = true;
if ($discussions = $DB->get_records('forum_discussions', array('forum'=>$forum->id))) {
foreach ($discussions as $discussion) {
if (!forum_delete_discussion($discussion, true, $course, $cm, $forum)) {
$result = false;
}
}
}
if (!$DB->delete_records('forum_subscriptions', array('forum'=>$forum->id))) {
$result = false;
}
forum_tp_delete_read_records(-1, -1, -1, $forum->id);
if (!$DB->delete_records('forum', array('id'=>$forum->id))) {
$result = false;
}
forum_grade_item_delete($forum);
return $result;
}
/**
* Indicates API features that the forum supports.
*
* @uses FEATURE_GROUPS
* @uses FEATURE_GROUPINGS
* @uses FEATURE_GROUPMEMBERSONLY
* @uses FEATURE_MOD_INTRO
* @uses FEATURE_COMPLETION_TRACKS_VIEWS
* @uses FEATURE_COMPLETION_HAS_RULES
* @uses FEATURE_GRADE_HAS_GRADE
* @uses FEATURE_GRADE_OUTCOMES
* @param string $feature
* @return mixed True if yes (some features may use other values)
*/
function forum_supports($feature) {
switch($feature) {
case FEATURE_GROUPS: return true;
case FEATURE_GROUPINGS: return true;
case FEATURE_GROUPMEMBERSONLY: return true;
case FEATURE_MOD_INTRO: return true;
case FEATURE_COMPLETION_TRACKS_VIEWS: return true;
case FEATURE_COMPLETION_HAS_RULES: return true;
case FEATURE_GRADE_HAS_GRADE: return true;
case FEATURE_GRADE_OUTCOMES: return true;
case FEATURE_RATE: return true;
case FEATURE_BACKUP_MOODLE2: return true;
case FEATURE_SHOW_DESCRIPTION: return true;
case FEATURE_PLAGIARISM: return true;
default: return null;
}
}
/**
* Obtains the automatic completion state for this forum based on any conditions
* in forum settings.
*
* @global object
* @global object
* @param object $course Course
* @param object $cm Course-module
* @param int $userid User ID
* @param bool $type Type of comparison (or/and; can be used as return value if no conditions)
* @return bool True if completed, false if not. (If no conditions, then return
* value depends on comparison type)
*/
function forum_get_completion_state($course,$cm,$userid,$type) {
global $CFG,$DB;
// Get forum details
if (!($forum=$DB->get_record('forum',array('id'=>$cm->instance)))) {
throw new Exception("Can't find forum {$cm->instance}");
}
$result=$type; // Default return value
$postcountparams=array('userid'=>$userid,'forumid'=>$forum->id);
$postcountsql="
SELECT
COUNT(1)
FROM
{forum_posts} fp
INNER JOIN {forum_discussions} fd ON fp.discussion=fd.id
WHERE
fp.userid=:userid AND fd.forum=:forumid";
if ($forum->completiondiscussions) {
$value = $forum->completiondiscussions <=
$DB->count_records('forum_discussions',array('forum'=>$forum->id,'userid'=>$userid));
if ($type == COMPLETION_AND) {
$result = $result && $value;
} else {
$result = $result || $value;
}
}
if ($forum->completionreplies) {
$value = $forum->completionreplies <=
$DB->get_field_sql( $postcountsql.' AND fp.parent<>0',$postcountparams);
if ($type==COMPLETION_AND) {
$result = $result && $value;
} else {
$result = $result || $value;
}
}
if ($forum->completionposts) {
$value = $forum->completionposts <= $DB->get_field_sql($postcountsql,$postcountparams);
if ($type == COMPLETION_AND) {
$result = $result && $value;
} else {
$result = $result || $value;
}
}
return $result;
}
/**
* Create a message-id string to use in the custom headers of forum notification emails
*
* message-id is used by email clients to identify emails and to nest conversations
*
* @param int $postid The ID of the forum post we are notifying the user about
* @param int $usertoid The ID of the user being notified
* @param string $hostname The server's hostname
* @return string A unique message-id
*/
function forum_get_email_message_id($postid, $usertoid, $hostname) {
return '<'.hash('sha256',$postid.'to'.$usertoid).'@'.$hostname.'>';
}
/**
* Removes properties from user record that are not necessary
* for sending post notifications.
* @param stdClass $user
* @return void, $user parameter is modified
*/
function forum_cron_minimise_user_record(stdClass $user) {
// We store large amount of users in one huge array,
// make sure we do not store info there we do not actually need
// in mail generation code or messaging.
unset($user->institution);
unset($user->department);
unset($user->address);
unset($user->city);
unset($user->url);
unset($user->currentlogin);
unset($user->description);
unset($user->descriptionformat);
}
/**
* Function to be run periodically according to the moodle cron
* Finds all posts that have yet to be mailed out, and mails them
* out to all subscribers
*
* @global object
* @global object
* @global object
* @uses CONTEXT_MODULE
* @uses CONTEXT_COURSE
* @uses SITEID
* @uses FORMAT_PLAIN
* @return void
*/
function forum_cron() {
global $CFG, $USER, $DB;
$site = get_site();
// All users that are subscribed to any post that needs sending,
// please increase $CFG->extramemorylimit on large sites that
// send notifications to a large number of users.
$users = array();
$userscount = 0; // Cached user counter - count($users) in PHP is horribly slow!!!
// status arrays
$mailcount = array();
$errorcount = array();
// caches
$discussions = array();
$forums = array();
$courses = array();
$coursemodules = array();
$subscribedusers = array();
// Posts older than 2 days will not be mailed. This is to avoid the problem where
// cron has not been running for a long time, and then suddenly people are flooded
// with mail from the past few weeks or months
$timenow = time();
$endtime = $timenow - $CFG->maxeditingtime;
$starttime = $endtime - 48 * 3600; // Two days earlier
if ($posts = forum_get_unmailed_posts($starttime, $endtime, $timenow)) {
// Mark them all now as being mailed. It's unlikely but possible there
// might be an error later so that a post is NOT actually mailed out,
// but since mail isn't crucial, we can accept this risk. Doing it now
// prevents the risk of duplicated mails, which is a worse problem.
if (!forum_mark_old_posts_as_mailed($endtime)) {
mtrace('Errors occurred while trying to mark some posts as being mailed.');
return false; // Don't continue trying to mail them, in case we are in a cron loop
}
// checking post validity, and adding users to loop through later
foreach ($posts as $pid => $post) {
$discussionid = $post->discussion;
if (!isset($discussions[$discussionid])) {
if ($discussion = $DB->get_record('forum_discussions', array('id'=> $post->discussion))) {
$discussions[$discussionid] = $discussion;
} else {
mtrace('Could not find discussion '.$discussionid);
unset($posts[$pid]);
continue;
}
}
$forumid = $discussions[$discussionid]->forum;
if (!isset($forums[$forumid])) {
if ($forum = $DB->get_record('forum', array('id' => $forumid))) {
$forums[$forumid] = $forum;
} else {
mtrace('Could not find forum '.$forumid);
unset($posts[$pid]);
continue;
}
}
$courseid = $forums[$forumid]->course;
if (!isset($courses[$courseid])) {
if ($course = $DB->get_record('course', array('id' => $courseid))) {
$courses[$courseid] = $course;
} else {
mtrace('Could not find course '.$courseid);
unset($posts[$pid]);
continue;
}
}
if (!isset($coursemodules[$forumid])) {
if ($cm = get_coursemodule_from_instance('forum', $forumid, $courseid)) {
$coursemodules[$forumid] = $cm;
} else {
mtrace('Could not find course module for forum '.$forumid);
unset($posts[$pid]);
continue;
}
}
// caching subscribed users of each forum
if (!isset($subscribedusers[$forumid])) {
$modcontext = context_module::instance($coursemodules[$forumid]->id);
if ($subusers = forum_subscribed_users($courses[$courseid], $forums[$forumid], 0, $modcontext, "u.*")) {
foreach ($subusers as $postuser) {
// this user is subscribed to this forum
$subscribedusers[$forumid][$postuser->id] = $postuser->id;
$userscount++;
if ($userscount > FORUM_CRON_USER_CACHE) {
// Store minimal user info.
$minuser = new stdClass();
$minuser->id = $postuser->id;
$users[$postuser->id] = $minuser;
} else {
// Cache full user record.
forum_cron_minimise_user_record($postuser);
$users[$postuser->id] = $postuser;
}
}
// Release memory.
unset($subusers);
unset($postuser);
}
}
$mailcount[$pid] = 0;
$errorcount[$pid] = 0;
}
}
if ($users && $posts) {
$urlinfo = parse_url($CFG->wwwroot);
$hostname = $urlinfo['host'];
foreach ($users as $userto) {
@set_time_limit(120); // terminate if processing of any account takes longer than 2 minutes
mtrace('Processing user '.$userto->id);
// Init user caches - we keep the cache for one cycle only,
// otherwise it could consume too much memory.
if (isset($userto->username)) {
$userto = clone($userto);
} else {
$userto = $DB->get_record('user', array('id' => $userto->id));
forum_cron_minimise_user_record($userto);
}
$userto->viewfullnames = array();
$userto->canpost = array();
$userto->markposts = array();
// set this so that the capabilities are cached, and environment matches receiving user
cron_setup_user($userto);
// reset the caches
foreach ($coursemodules as $forumid=>$unused) {
$coursemodules[$forumid]->cache = new stdClass();
$coursemodules[$forumid]->cache->caps = array();
unset($coursemodules[$forumid]->uservisible);
}
foreach ($posts as $pid => $post) {
// Set up the environment for the post, discussion, forum, course
$discussion = $discussions[$post->discussion];
$forum = $forums[$discussion->forum];
$course = $courses[$forum->course];
$cm =& $coursemodules[$forum->id];
// Do some checks to see if we can bail out now
// Only active enrolled users are in the list of subscribers
if (!isset($subscribedusers[$forum->id][$userto->id])) {
continue; // user does not subscribe to this forum
}
// Don't send email if the forum is Q&A and the user has not posted
// Initial topics are still mailed
if ($forum->type == 'qanda' && !forum_get_user_posted_time($discussion->id, $userto->id) && $pid != $discussion->firstpost) {
mtrace('Did not email '.$userto->id.' because user has not posted in discussion');
continue;
}
// Get info about the sending user
if (array_key_exists($post->userid, $users)) { // we might know him/her already
$userfrom = $users[$post->userid];
if (!isset($userfrom->idnumber)) {
// Minimalised user info, fetch full record.
$userfrom = $DB->get_record('user', array('id' => $userfrom->id));
forum_cron_minimise_user_record($userfrom);
}
} else if ($userfrom = $DB->get_record('user', array('id' => $post->userid))) {
forum_cron_minimise_user_record($userfrom);
// Fetch only once if possible, we can add it to user list, it will be skipped anyway.
if ($userscount <= FORUM_CRON_USER_CACHE) {
$userscount++;
$users[$userfrom->id] = $userfrom;
}
} else {
mtrace('Could not find user '.$post->userid);
continue;
}
//if we want to check that userto and userfrom are not the same person this is probably the spot to do it
// setup global $COURSE properly - needed for roles and languages
cron_setup_user($userto, $course);
// Fill caches
if (!isset($userto->viewfullnames[$forum->id])) {
$modcontext = context_module::instance($cm->id);
$userto->viewfullnames[$forum->id] = has_capability('moodle/site:viewfullnames', $modcontext);
}
if (!isset($userto->canpost[$discussion->id])) {
$modcontext = context_module::instance($cm->id);
$userto->canpost[$discussion->id] = forum_user_can_post($forum, $discussion, $userto, $cm, $course, $modcontext);
}
if (!isset($userfrom->groups[$forum->id])) {
if (!isset($userfrom->groups)) {
$userfrom->groups = array();
if (isset($users[$userfrom->id])) {
$users[$userfrom->id]->groups = array();
}
}
$userfrom->groups[$forum->id] = groups_get_all_groups($course->id, $userfrom->id, $cm->groupingid);
if (isset($users[$userfrom->id])) {
$users[$userfrom->id]->groups[$forum->id] = $userfrom->groups[$forum->id];
}
}
// Make sure groups allow this user to see this email
if ($discussion->groupid > 0 and $groupmode = groups_get_activity_groupmode($cm, $course)) { // Groups are being used
if (!groups_group_exists($discussion->groupid)) { // Can't find group
continue; // Be safe and don't send it to anyone
}
if (!groups_is_member($discussion->groupid) and !has_capability('moodle/site:accessallgroups', $modcontext)) {
// do not send posts from other groups when in SEPARATEGROUPS or VISIBLEGROUPS
continue;
}
}
// Make sure we're allowed to see it...
if (!forum_user_can_see_post($forum, $discussion, $post, NULL, $cm)) {
mtrace('user '.$userto->id. ' can not see '.$post->id);
continue;
}
// OK so we need to send the email.
// Does the user want this post in a digest? If so postpone it for now.
if ($userto->maildigest > 0) {
// This user wants the mails to be in digest form
$queue = new stdClass();
$queue->userid = $userto->id;
$queue->discussionid = $discussion->id;
$queue->postid = $post->id;
$queue->timemodified = $post->created;
$DB->insert_record('forum_queue', $queue);
continue;
}
// Prepare to actually send the post now, and build up the content
$cleanforumname = str_replace('"', "'", strip_tags(format_string($forum->name)));
$userfrom->customheaders = array ( // Headers to make emails easier to track
'Precedence: Bulk',
'List-Id: "'.$cleanforumname.'" <moodleforum'.$forum->id.'@'.$hostname.'>',
'List-Help: '.$CFG->wwwroot.'/mod/forum/view.php?f='.$forum->id,
'Message-ID: '.forum_get_email_message_id($post->id, $userto->id, $hostname),
'X-Course-Id: '.$course->id,
'X-Course-Name: '.format_string($course->fullname, true)
);
if ($post->parent) { // This post is a reply, so add headers for threading (see MDL-22551)
$userfrom->customheaders[] = 'In-Reply-To: '.forum_get_email_message_id($post->parent, $userto->id, $hostname);
$userfrom->customheaders[] = 'References: '.forum_get_email_message_id($post->parent, $userto->id, $hostname);
}
$shortname = format_string($course->shortname, true, array('context' => context_course::instance($course->id)));
$postsubject = html_to_text("$shortname: ".format_string($post->subject, true));
$posttext = forum_make_mail_text($course, $cm, $forum, $discussion, $post, $userfrom, $userto);
$posthtml = forum_make_mail_html($course, $cm, $forum, $discussion, $post, $userfrom, $userto);
// Send the post now!
mtrace('Sending ', '');
$eventdata = new stdClass();
$eventdata->component = 'mod_forum';
$eventdata->name = 'posts';
$eventdata->userfrom = $userfrom;
$eventdata->userto = $userto;
$eventdata->subject = $postsubject;
$eventdata->fullmessage = $posttext;
$eventdata->fullmessageformat = FORMAT_PLAIN;
$eventdata->fullmessagehtml = $posthtml;
$eventdata->notification = 1;
// If forum_replytouser is not set then send mail using the noreplyaddress.
if (empty($CFG->forum_replytouser)) {
// Clone userfrom as it is referenced by $users.
$cloneduserfrom = clone($userfrom);
$cloneduserfrom->email = $CFG->noreplyaddress;
$eventdata->userfrom = $cloneduserfrom;
}
$smallmessagestrings = new stdClass();
$smallmessagestrings->user = fullname($userfrom);
$smallmessagestrings->forumname = "$shortname: ".format_string($forum->name,true).": ".$discussion->name;
$smallmessagestrings->message = $post->message;
//make sure strings are in message recipients language
$eventdata->smallmessage = get_string_manager()->get_string('smallmessage', 'forum', $smallmessagestrings, $userto->lang);
$eventdata->contexturl = "{$CFG->wwwroot}/mod/forum/discuss.php?d={$discussion->id}#p{$post->id}";
$eventdata->contexturlname = $discussion->name;
$mailresult = message_send($eventdata);
if (!$mailresult){
mtrace("Error: mod/forum/lib.php forum_cron(): Could not send out mail for id $post->id to user $userto->id".
" ($userto->email) .. not trying again.");
add_to_log($course->id, 'forum', 'mail error', "discuss.php?d=$discussion->id#p$post->id",
substr(format_string($post->subject,true),0,30), $cm->id, $userto->id);
$errorcount[$post->id]++;
} else {
$mailcount[$post->id]++;
// Mark post as read if forum_usermarksread is set off
if (!$CFG->forum_usermarksread) {
$userto->markposts[$post->id] = $post->id;
}
}
mtrace('post '.$post->id. ': '.$post->subject);
}
// mark processed posts as read
forum_tp_mark_posts_read($userto, $userto->markposts);
unset($userto);
}
}
if ($posts) {
foreach ($posts as $post) {
mtrace($mailcount[$post->id]." users were sent post $post->id, '$post->subject'");
if ($errorcount[$post->id]) {
$DB->set_field("forum_posts", "mailed", "2", array("id" => "$post->id"));
}
}
}
// release some memory
unset($subscribedusers);
unset($mailcount);
unset($errorcount);
cron_setup_user();
$sitetimezone = $CFG->timezone;
// Now see if there are any digest mails waiting to be sent, and if we should send them
mtrace('Starting digest processing...');
@set_time_limit(300); // terminate if not able to fetch all digests in 5 minutes
if (!isset($CFG->digestmailtimelast)) { // To catch the first time
set_config('digestmailtimelast', 0);
}
$timenow = time();
$digesttime = usergetmidnight($timenow, $sitetimezone) + ($CFG->digestmailtime * 3600);
// Delete any really old ones (normally there shouldn't be any)
$weekago = $timenow - (7 * 24 * 3600);
$DB->delete_records_select('forum_queue', "timemodified < ?", array($weekago));
mtrace ('Cleaned old digest records');
if ($CFG->digestmailtimelast < $digesttime and $timenow > $digesttime) {
mtrace('Sending forum digests: '.userdate($timenow, '', $sitetimezone));
$digestposts_rs = $DB->get_recordset_select('forum_queue', "timemodified < ?", array($digesttime));
if ($digestposts_rs->valid()) {
// We have work to do
$usermailcount = 0;
//caches - reuse the those filled before too
$discussionposts = array();
$userdiscussions = array();
foreach ($digestposts_rs as $digestpost) {
if (!isset($posts[$digestpost->postid])) {
if ($post = $DB->get_record('forum_posts', array('id' => $digestpost->postid))) {
$posts[$digestpost->postid] = $post;
} else {
continue;
}
}
$discussionid = $digestpost->discussionid;
if (!isset($discussions[$discussionid])) {
if ($discussion = $DB->get_record('forum_discussions', array('id' => $discussionid))) {
$discussions[$discussionid] = $discussion;
} else {
continue;
}
}
$forumid = $discussions[$discussionid]->forum;
if (!isset($forums[$forumid])) {
if ($forum = $DB->get_record('forum', array('id' => $forumid))) {
$forums[$forumid] = $forum;
} else {
continue;
}
}
$courseid = $forums[$forumid]->course;
if (!isset($courses[$courseid])) {
if ($course = $DB->get_record('course', array('id' => $courseid))) {
$courses[$courseid] = $course;
} else {
continue;
}
}
if (!isset($coursemodules[$forumid])) {
if ($cm = get_coursemodule_from_instance('forum', $forumid, $courseid)) {
$coursemodules[$forumid] = $cm;
} else {
continue;
}
}
$userdiscussions[$digestpost->userid][$digestpost->discussionid] = $digestpost->discussionid;
$discussionposts[$digestpost->discussionid][$digestpost->postid] = $digestpost->postid;
}
$digestposts_rs->close(); /// Finished iteration, let's close the resultset
// Data collected, start sending out emails to each user
foreach ($userdiscussions as $userid => $thesediscussions) {
@set_time_limit(120); // terminate if processing of any account takes longer than 2 minutes
cron_setup_user();
mtrace(get_string('processingdigest', 'forum', $userid), '... ');
// First of all delete all the queue entries for this user
$DB->delete_records_select('forum_queue', "userid = ? AND timemodified < ?", array($userid, $digesttime));
// Init user caches - we keep the cache for one cycle only,
// otherwise it would unnecessarily consume memory.
if (array_key_exists($userid, $users) and isset($users[$userid]->username)) {
$userto = clone($users[$userid]);
} else {
$userto = $DB->get_record('user', array('id' => $userid));
forum_cron_minimise_user_record($userto);
}
$userto->viewfullnames = array();
$userto->canpost = array();
$userto->markposts = array();
// Override the language and timezone of the "current" user, so that
// mail is customised for the receiver.
cron_setup_user($userto);
$postsubject = get_string('digestmailsubject', 'forum', format_string($site->shortname, true));
$headerdata = new stdClass();
$headerdata->sitename = format_string($site->fullname, true);
$headerdata->userprefs = $CFG->wwwroot.'/user/edit.php?id='.$userid.'&course='.$site->id;
$posttext = get_string('digestmailheader', 'forum', $headerdata)."\n\n";
$headerdata->userprefs = '<a target="_blank" href="'.$headerdata->userprefs.'">'.get_string('digestmailprefs', 'forum').'</a>';
$posthtml = "<head>";
/* foreach ($CFG->stylesheets as $stylesheet) {
//TODO: MDL-21120
$posthtml .= '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'" />'."\n";
}*/
$posthtml .= "</head>\n<body id=\"email\">\n";
$posthtml .= '<p>'.get_string('digestmailheader', 'forum', $headerdata).'</p><br /><hr size="1" noshade="noshade" />';
foreach ($thesediscussions as $discussionid) {
@set_time_limit(120); // to be reset for each post
$discussion = $discussions[$discussionid];
$forum = $forums[$discussion->forum];
$course = $courses[$forum->course];
$cm = $coursemodules[$forum->id];
//override language
cron_setup_user($userto, $course);
// Fill caches
if (!isset($userto->viewfullnames[$forum->id])) {
$modcontext = context_module::instance($cm->id);
$userto->viewfullnames[$forum->id] = has_capability('moodle/site:viewfullnames', $modcontext);
}
if (!isset($userto->canpost[$discussion->id])) {
$modcontext = context_module::instance($cm->id);
$userto->canpost[$discussion->id] = forum_user_can_post($forum, $discussion, $userto, $cm, $course, $modcontext);
}
$strforums = get_string('forums', 'forum');
$canunsubscribe = ! forum_is_forcesubscribed($forum);
$canreply = $userto->canpost[$discussion->id];
$shortname = format_string($course->shortname, true, array('context' => context_course::instance($course->id)));
$posttext .= "\n \n";
$posttext .= '=====================================================================';
$posttext .= "\n \n";
$posttext .= "$shortname -> $strforums -> ".format_string($forum->name,true);
if ($discussion->name != $forum->name) {
$posttext .= " -> ".format_string($discussion->name,true);
}
$posttext .= "\n";
$posthtml .= "<p><font face=\"sans-serif\">".
"<a target=\"_blank\" href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$shortname</a> -> ".
"<a target=\"_blank\" href=\"$CFG->wwwroot/mod/forum/index.php?id=$course->id\">$strforums</a> -> ".
"<a target=\"_blank\" href=\"$CFG->wwwroot/mod/forum/view.php?f=$forum->id\">".format_string($forum->name,true)."</a>";
if ($discussion->name == $forum->name) {
$posthtml .= "</font></p>";
} else {
$posthtml .= " -> <a target=\"_blank\" href=\"$CFG->wwwroot/mod/forum/discuss.php?d=$discussion->id\">".format_string($discussion->name,true)."</a></font></p>";
}
$posthtml .= '<p>';
$postsarray = $discussionposts[$discussionid];
sort($postsarray);
foreach ($postsarray as $postid) {
$post = $posts[$postid];
if (array_key_exists($post->userid, $users)) { // we might know him/her already
$userfrom = $users[$post->userid];
if (!isset($userfrom->idnumber)) {
$userfrom = $DB->get_record('user', array('id' => $userfrom->id));
forum_cron_minimise_user_record($userfrom);
}
} else if ($userfrom = $DB->get_record('user', array('id' => $post->userid))) {
forum_cron_minimise_user_record($userfrom);
if ($userscount <= FORUM_CRON_USER_CACHE) {
$userscount++;
$users[$userfrom->id] = $userfrom;
}
} else {
mtrace('Could not find user '.$post->userid);
continue;
}
if (!isset($userfrom->groups[$forum->id])) {
if (!isset($userfrom->groups)) {
$userfrom->groups = array();
if (isset($users[$userfrom->id])) {
$users[$userfrom->id]->groups = array();
}
}
$userfrom->groups[$forum->id] = groups_get_all_groups($course->id, $userfrom->id, $cm->groupingid);
if (isset($users[$userfrom->id])) {
$users[$userfrom->id]->groups[$forum->id] = $userfrom->groups[$forum->id];
}
}
$userfrom->customheaders = array ("Precedence: Bulk");
if ($userto->maildigest == 2) {
// Subjects only
$by = new stdClass();
$by->name = fullname($userfrom);
$by->date = userdate($post->modified);
$posttext .= "\n".format_string($post->subject,true).' '.get_string("bynameondate", "forum", $by);
$posttext .= "\n---------------------------------------------------------------------";
$by->name = "<a target=\"_blank\" href=\"$CFG->wwwroot/user/view.php?id=$userfrom->id&course=$course->id\">$by->name</a>";
$posthtml .= '<div><a target="_blank" href="'.$CFG->wwwroot.'/mod/forum/discuss.php?d='.$discussion->id.'#p'.$post->id.'">'.format_string($post->subject,true).'</a> '.get_string("bynameondate", "forum", $by).'</div>';
} else {
// The full treatment