/**
  * Do the job.
  * Throw exceptions on errors (the job will be retried).
  */
 public function execute()
 {
     global $CFG;
     if ($CFG->enablecompletion) {
         // Completion cron.
         require_once $CFG->dirroot . '/completion/cron.php';
         completion_cron();
     }
 }
示例#2
0
/**
 * Execute cron tasks
 */
function cron_run()
{
    global $DB, $CFG, $OUTPUT;
    if (CLI_MAINTENANCE) {
        echo "CLI maintenance mode active, cron execution suspended.\n";
        exit(1);
    }
    if (moodle_needs_upgrading()) {
        echo "Moodle upgrade pending, cron execution suspended.\n";
        exit(1);
    }
    require_once $CFG->libdir . '/adminlib.php';
    require_once $CFG->libdir . '/gradelib.php';
    if (!empty($CFG->showcronsql)) {
        $DB->set_debug(true);
    }
    if (!empty($CFG->showcrondebugging)) {
        set_debugging(DEBUG_DEVELOPER, true);
    }
    set_time_limit(0);
    $starttime = microtime();
    // Increase memory limit
    raise_memory_limit(MEMORY_EXTRA);
    // Emulate normal session - we use admin accoutn by default
    cron_setup_user();
    // Start output log
    $timenow = time();
    mtrace("Server Time: " . date('r', $timenow) . "\n\n");
    // Run cleanup core cron jobs, but not every time since they aren't too important.
    // These don't have a timer to reduce load, so we'll use a random number
    // to randomly choose the percentage of times we should run these jobs.
    $random100 = rand(0, 100);
    if ($random100 < 20) {
        // Approximately 20% of the time.
        mtrace("Running clean-up tasks...");
        cron_trace_time_and_memory();
        // Delete users who haven't confirmed within required period
        if (!empty($CFG->deleteunconfirmed)) {
            $cuttime = $timenow - $CFG->deleteunconfirmed * 3600;
            $rs = $DB->get_recordset_sql("SELECT *\n                                             FROM {user}\n                                            WHERE confirmed = 0 AND firstaccess > 0\n                                                  AND firstaccess < ?", array($cuttime));
            foreach ($rs as $user) {
                delete_user($user);
                // we MUST delete user properly first
                $DB->delete_records('user', array('id' => $user->id));
                // this is a bloody hack, but it might work
                mtrace(" Deleted unconfirmed user for " . fullname($user, true) . " ({$user->id})");
            }
            $rs->close();
        }
        // Delete users who haven't completed profile within required period
        if (!empty($CFG->deleteincompleteusers)) {
            $cuttime = $timenow - $CFG->deleteincompleteusers * 3600;
            $rs = $DB->get_recordset_sql("SELECT *\n                                             FROM {user}\n                                            WHERE confirmed = 1 AND lastaccess > 0\n                                                  AND lastaccess < ? AND deleted = 0\n                                                  AND (lastname = '' OR firstname = '' OR email = '')", array($cuttime));
            foreach ($rs as $user) {
                if (isguestuser($user) or is_siteadmin($user)) {
                    continue;
                }
                delete_user($user);
                mtrace(" Deleted not fully setup user {$user->username} ({$user->id})");
            }
            $rs->close();
        }
        // Delete old logs to save space (this might need a timer to slow it down...)
        if (!empty($CFG->loglifetime)) {
            // value in days
            $loglifetime = $timenow - $CFG->loglifetime * 3600 * 24;
            $DB->delete_records_select("log", "time < ?", array($loglifetime));
            mtrace(" Deleted old log records");
        }
        // Delete old backup_controllers and logs.
        $loglifetime = get_config('backup', 'loglifetime');
        if (!empty($loglifetime)) {
            // Value in days.
            $loglifetime = $timenow - $loglifetime * 3600 * 24;
            // Delete child records from backup_logs.
            $DB->execute("DELETE FROM {backup_logs}\n                           WHERE EXISTS (\n                               SELECT 'x'\n                                 FROM {backup_controllers} bc\n                                WHERE bc.backupid = {backup_logs}.backupid\n                                  AND bc.timecreated < ?)", array($loglifetime));
            // Delete records from backup_controllers.
            $DB->execute("DELETE FROM {backup_controllers}\n                          WHERE timecreated < ?", array($loglifetime));
            mtrace(" Deleted old backup records");
        }
        // Delete old cached texts
        if (!empty($CFG->cachetext)) {
            // Defined in config.php
            $cachelifetime = time() - $CFG->cachetext - 60;
            // Add an extra minute to allow for really heavy sites
            $DB->delete_records_select('cache_text', "timemodified < ?", array($cachelifetime));
            mtrace(" Deleted old cache_text records");
        }
        if (!empty($CFG->usetags)) {
            require_once $CFG->dirroot . '/tag/lib.php';
            tag_cron();
            mtrace(' Executed tag cron');
        }
        // Context maintenance stuff
        context_helper::cleanup_instances();
        mtrace(' Cleaned up context instances');
        context_helper::build_all_paths(false);
        // If you suspect that the context paths are somehow corrupt
        // replace the line below with: context_helper::build_all_paths(true);
        mtrace(' Built context paths');
        // Remove expired cache flags
        gc_cache_flags();
        mtrace(' Cleaned cache flags');
        // Cleanup messaging
        if (!empty($CFG->messagingdeletereadnotificationsdelay)) {
            $notificationdeletetime = time() - $CFG->messagingdeletereadnotificationsdelay;
            $DB->delete_records_select('message_read', 'notification=1 AND timeread<:notificationdeletetime', array('notificationdeletetime' => $notificationdeletetime));
            mtrace(' Cleaned up read notifications');
        }
        mtrace(' Deleting temporary files...');
        cron_delete_from_temp();
        // Cleanup user password reset records
        // Delete any reset request records which are expired by more than a day.
        // (We keep recently expired requests around so we can give a different error msg to users who
        // are trying to user a recently expired reset attempt).
        $pwresettime = isset($CFG->pwresettime) ? $CFG->pwresettime : 1800;
        $earliestvalid = time() - $pwresettime - DAYSECS;
        $DB->delete_records_select('user_password_resets', "timerequested < ?", array($earliestvalid));
        mtrace(' Cleaned up old password reset records');
        mtrace("...finished clean-up tasks");
    }
    // End of occasional clean-up tasks
    // Send login failures notification - brute force protection in moodle is weak,
    // we should at least send notices early in each cron execution
    if (notify_login_failures()) {
        mtrace(' Notified login failures');
    }
    // Make sure all context instances are properly created - they may be required in auth, enrol, etc.
    context_helper::create_instances();
    mtrace(' Created missing context instances');
    // Session gc.
    mtrace("Running session gc tasks...");
    \core\session\manager::gc();
    mtrace("...finished stale session cleanup");
    // Run the auth cron, if any before enrolments
    // because it might add users that will be needed in enrol plugins
    $auths = get_enabled_auth_plugins();
    mtrace("Running auth crons if required...");
    cron_trace_time_and_memory();
    foreach ($auths as $auth) {
        $authplugin = get_auth_plugin($auth);
        if (method_exists($authplugin, 'cron')) {
            mtrace("Running cron for auth/{$auth}...");
            $authplugin->cron();
            if (!empty($authplugin->log)) {
                mtrace($authplugin->log);
            }
        }
        unset($authplugin);
    }
    // Generate new password emails for users - ppl expect these generated asap
    if ($DB->count_records('user_preferences', array('name' => 'create_password', 'value' => '1'))) {
        mtrace('Creating passwords for new users...');
        $usernamefields = get_all_user_name_fields(true, 'u');
        $newusers = $DB->get_recordset_sql("SELECT u.id as id, u.email,\n                                                 {$usernamefields}, u.username, u.lang,\n                                                 p.id as prefid\n                                            FROM {user} u\n                                            JOIN {user_preferences} p ON u.id=p.userid\n                                           WHERE p.name='create_password' AND p.value='1' AND u.email !='' AND u.suspended = 0 AND u.auth != 'nologin' AND u.deleted = 0");
        // note: we can not send emails to suspended accounts
        foreach ($newusers as $newuser) {
            // Use a low cost factor when generating bcrypt hash otherwise
            // hashing would be slow when emailing lots of users. Hashes
            // will be automatically updated to a higher cost factor the first
            // time the user logs in.
            if (setnew_password_and_mail($newuser, true)) {
                unset_user_preference('create_password', $newuser);
                set_user_preference('auth_forcepasswordchange', 1, $newuser);
            } else {
                trigger_error("Could not create and mail new user password!");
            }
        }
        $newusers->close();
    }
    // It is very important to run enrol early
    // because other plugins depend on correct enrolment info.
    mtrace("Running enrol crons if required...");
    $enrols = enrol_get_plugins(true);
    foreach ($enrols as $ename => $enrol) {
        // do this for all plugins, disabled plugins might want to cleanup stuff such as roles
        if (!$enrol->is_cron_required()) {
            continue;
        }
        mtrace("Running cron for enrol_{$ename}...");
        cron_trace_time_and_memory();
        $enrol->cron();
        $enrol->set_config('lastcron', time());
    }
    // Run all cron jobs for each module
    mtrace("Starting activity modules");
    get_mailer('buffer');
    if ($mods = $DB->get_records_select("modules", "cron > 0 AND ((? - lastcron) > cron) AND visible = 1", array($timenow))) {
        foreach ($mods as $mod) {
            $libfile = "{$CFG->dirroot}/mod/{$mod->name}/lib.php";
            if (file_exists($libfile)) {
                include_once $libfile;
                $cron_function = $mod->name . "_cron";
                if (function_exists($cron_function)) {
                    mtrace("Processing module function {$cron_function} ...", '');
                    cron_trace_time_and_memory();
                    $pre_dbqueries = null;
                    $pre_dbqueries = $DB->perf_get_queries();
                    $pre_time = microtime(1);
                    if ($cron_function()) {
                        $DB->set_field("modules", "lastcron", $timenow, array("id" => $mod->id));
                    }
                    if (isset($pre_dbqueries)) {
                        mtrace("... used " . ($DB->perf_get_queries() - $pre_dbqueries) . " dbqueries");
                        mtrace("... used " . (microtime(1) - $pre_time) . " seconds");
                    }
                    // Reset possible changes by modules to time_limit. MDL-11597
                    @set_time_limit(0);
                    mtrace("done.");
                }
            }
        }
    }
    get_mailer('close');
    mtrace("Finished activity modules");
    mtrace("Starting blocks");
    if ($blocks = $DB->get_records_select("block", "cron > 0 AND ((? - lastcron) > cron) AND visible = 1", array($timenow))) {
        // We will need the base class.
        require_once $CFG->dirroot . '/blocks/moodleblock.class.php';
        foreach ($blocks as $block) {
            $blockfile = $CFG->dirroot . '/blocks/' . $block->name . '/block_' . $block->name . '.php';
            if (file_exists($blockfile)) {
                require_once $blockfile;
                $classname = 'block_' . $block->name;
                $blockobj = new $classname();
                if (method_exists($blockobj, 'cron')) {
                    mtrace("Processing cron function for " . $block->name . '....', '');
                    cron_trace_time_and_memory();
                    if ($blockobj->cron()) {
                        $DB->set_field('block', 'lastcron', $timenow, array('id' => $block->id));
                    }
                    // Reset possible changes by blocks to time_limit. MDL-11597
                    @set_time_limit(0);
                    mtrace('done.');
                }
            }
        }
    }
    mtrace('Finished blocks');
    mtrace('Starting admin reports');
    cron_execute_plugin_type('report');
    mtrace('Finished admin reports');
    mtrace('Starting main gradebook job...');
    cron_trace_time_and_memory();
    grade_cron();
    mtrace('done.');
    mtrace('Starting processing the event queue...');
    cron_trace_time_and_memory();
    events_cron();
    mtrace('done.');
    if ($CFG->enablecompletion) {
        // Completion cron
        mtrace('Starting the completion cron...');
        cron_trace_time_and_memory();
        require_once $CFG->dirroot . '/completion/cron.php';
        completion_cron();
        mtrace('done');
    }
    if ($CFG->enableportfolios) {
        // Portfolio cron
        mtrace('Starting the portfolio cron...');
        cron_trace_time_and_memory();
        require_once $CFG->libdir . '/portfoliolib.php';
        portfolio_cron();
        mtrace('done');
    }
    //now do plagiarism checks
    require_once $CFG->libdir . '/plagiarismlib.php';
    plagiarism_cron();
    mtrace('Starting course reports');
    cron_execute_plugin_type('coursereport');
    mtrace('Finished course reports');
    // run gradebook import/export/report cron
    mtrace('Starting gradebook plugins');
    cron_execute_plugin_type('gradeimport');
    cron_execute_plugin_type('gradeexport');
    cron_execute_plugin_type('gradereport');
    mtrace('Finished gradebook plugins');
    // run calendar cron
    require_once "{$CFG->dirroot}/calendar/lib.php";
    calendar_cron();
    // Run external blog cron if needed
    if (!empty($CFG->enableblogs) && $CFG->useexternalblogs) {
        require_once $CFG->dirroot . '/blog/lib.php';
        mtrace("Fetching external blog entries...", '');
        cron_trace_time_and_memory();
        $sql = "timefetched < ? OR timefetched = 0";
        $externalblogs = $DB->get_records_select('blog_external', $sql, array(time() - $CFG->externalblogcrontime));
        foreach ($externalblogs as $eb) {
            blog_sync_external_entries($eb);
        }
        mtrace('done.');
    }
    // Run blog associations cleanup
    if (!empty($CFG->enableblogs) && $CFG->useblogassociations) {
        require_once $CFG->dirroot . '/blog/lib.php';
        // delete entries whose contextids no longer exists
        mtrace("Deleting blog associations linked to non-existent contexts...", '');
        cron_trace_time_and_memory();
        $DB->delete_records_select('blog_association', 'contextid NOT IN (SELECT id FROM {context})');
        mtrace('done.');
    }
    // Run question bank clean-up.
    mtrace("Starting the question bank cron...", '');
    cron_trace_time_and_memory();
    require_once $CFG->libdir . '/questionlib.php';
    question_bank::cron();
    mtrace('done.');
    //Run registration updated cron
    mtrace(get_string('siteupdatesstart', 'hub'));
    cron_trace_time_and_memory();
    require_once $CFG->dirroot . '/' . $CFG->admin . '/registration/lib.php';
    $registrationmanager = new registration_manager();
    $registrationmanager->cron();
    mtrace(get_string('siteupdatesend', 'hub'));
    // If enabled, fetch information about available updates and eventually notify site admins
    if (empty($CFG->disableupdatenotifications)) {
        $updateschecker = \core\update\checker::instance();
        $updateschecker->cron();
    }
    //cleanup old session linked tokens
    //deletes the session linked tokens that are over a day old.
    mtrace("Deleting session linked tokens more than one day old...", '');
    cron_trace_time_and_memory();
    $DB->delete_records_select('external_tokens', 'lastaccess < :onedayago AND tokentype = :tokentype', array('onedayago' => time() - DAYSECS, 'tokentype' => EXTERNAL_TOKEN_EMBEDDED));
    mtrace('done.');
    // all other plugins
    cron_execute_plugin_type('message', 'message plugins');
    cron_execute_plugin_type('filter', 'filters');
    cron_execute_plugin_type('editor', 'editors');
    cron_execute_plugin_type('format', 'course formats');
    cron_execute_plugin_type('profilefield', 'profile fields');
    cron_execute_plugin_type('webservice', 'webservices');
    cron_execute_plugin_type('repository', 'repository plugins');
    cron_execute_plugin_type('qbehaviour', 'question behaviours');
    cron_execute_plugin_type('qformat', 'question import/export formats');
    cron_execute_plugin_type('qtype', 'question types');
    cron_execute_plugin_type('plagiarism', 'plagiarism plugins');
    cron_execute_plugin_type('theme', 'themes');
    cron_execute_plugin_type('tool', 'admin tools');
    // and finally run any local cronjobs, if any
    if ($locals = core_component::get_plugin_list('local')) {
        mtrace('Processing customized cron scripts ...', '');
        // new cron functions in lib.php first
        cron_execute_plugin_type('local');
        // legacy cron files are executed directly
        foreach ($locals as $local => $localdir) {
            if (file_exists("{$localdir}/cron.php")) {
                include "{$localdir}/cron.php";
            }
        }
        mtrace('done.');
    }
    mtrace('Running cache cron routines');
    cache_helper::cron();
    mtrace('done.');
    // Run automated backups if required - these may take a long time to execute
    require_once $CFG->dirroot . '/backup/util/includes/backup_includes.php';
    require_once $CFG->dirroot . '/backup/util/helper/backup_cron_helper.class.php';
    backup_cron_automated_helper::run_automated_backup();
    // Run stats as at the end because they are known to take very long time on large sites
    if (!empty($CFG->enablestats) and empty($CFG->disablestatsprocessing)) {
        require_once $CFG->dirroot . '/lib/statslib.php';
        // check we're not before our runtime
        $timetocheck = stats_get_base_daily() + $CFG->statsruntimestarthour * 60 * 60 + $CFG->statsruntimestartminute * 60;
        if (time() > $timetocheck) {
            // process configured number of days as max (defaulting to 31)
            $maxdays = empty($CFG->statsruntimedays) ? 31 : abs($CFG->statsruntimedays);
            if (stats_cron_daily($maxdays)) {
                if (stats_cron_weekly()) {
                    if (stats_cron_monthly()) {
                        stats_clean_old();
                    }
                }
            }
            @set_time_limit(0);
        } else {
            mtrace('Next stats run after:' . userdate($timetocheck));
        }
    }
    // Run badges review cron.
    mtrace("Starting badges cron...");
    require_once $CFG->dirroot . '/badges/cron.php';
    badge_cron();
    mtrace('done.');
    // cleanup file trash - not very important
    $fs = get_file_storage();
    $fs->cron();
    mtrace("Cron script completed correctly");
    gc_collect_cycles();
    mtrace('Cron completed at ' . date('H:i:s') . '. Memory used ' . display_size(memory_get_usage()) . '.');
    $difftime = microtime_diff($starttime, microtime());
    mtrace("Execution took " . $difftime . " seconds");
}
// 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/>.

/**
 * List the tool provided 
 *
 * @package    local
 * @subpackage  course_completions
 * @copyright  2015 Rajut 
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
require_once(dirname(__FILE__) . '/../config.php');

global $DB, $USER, $CFG,$COURSE,$PAGE,$OUTPUT;

require_once($CFG->dirroot . '/completion/cron.php');

completion_cron();



示例#4
0
/**
 * Cron functions.
 *
 * @package    core
 * @subpackage admin
 * @copyright  1999 onwards Martin Dougiamas  http://dougiamas.com
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
function cron_run()
{
    global $DB, $CFG, $OUTPUT;
    if (CLI_MAINTENANCE) {
        echo "CLI maintenance mode active, cron execution suspended.\n";
        exit(1);
    }
    if (moodle_needs_upgrading()) {
        echo "Moodle upgrade pending, cron execution suspended.\n";
        exit(1);
    }
    require_once $CFG->libdir . '/adminlib.php';
    require_once $CFG->libdir . '/gradelib.php';
    if (!empty($CFG->showcronsql)) {
        $DB->set_debug(true);
    }
    if (!empty($CFG->showcrondebugging)) {
        $CFG->debug = DEBUG_DEVELOPER;
        $CFG->debugdisplay = true;
    }
    set_time_limit(0);
    $starttime = microtime();
    /// increase memory limit
    raise_memory_limit(MEMORY_EXTRA);
    /// emulate normal session
    cron_setup_user();
    /// Start output log
    $timenow = time();
    mtrace("Server Time: " . date('r', $timenow) . "\n\n");
    /// Session gc
    mtrace("Cleaning up stale sessions");
    session_gc();
    /// Run all cron jobs for each module
    mtrace("Starting activity modules");
    get_mailer('buffer');
    if ($mods = $DB->get_records_select("modules", "cron > 0 AND ((? - lastcron) > cron) AND visible = 1", array($timenow))) {
        foreach ($mods as $mod) {
            $libfile = "{$CFG->dirroot}/mod/{$mod->name}/lib.php";
            if (file_exists($libfile)) {
                include_once $libfile;
                $cron_function = $mod->name . "_cron";
                if (function_exists($cron_function)) {
                    mtrace("Processing module function {$cron_function} ...", '');
                    $pre_dbqueries = null;
                    $pre_dbqueries = $DB->perf_get_queries();
                    $pre_time = microtime(1);
                    if ($cron_function()) {
                        $DB->set_field("modules", "lastcron", $timenow, array("id" => $mod->id));
                    }
                    if (isset($pre_dbqueries)) {
                        mtrace("... used " . ($DB->perf_get_queries() - $pre_dbqueries) . " dbqueries");
                        mtrace("... used " . (microtime(1) - $pre_time) . " seconds");
                    }
                    /// Reset possible changes by modules to time_limit. MDL-11597
                    @set_time_limit(0);
                    mtrace("done.");
                }
            }
        }
    }
    get_mailer('close');
    mtrace("Finished activity modules");
    mtrace("Starting blocks");
    if ($blocks = $DB->get_records_select("block", "cron > 0 AND ((? - lastcron) > cron) AND visible = 1", array($timenow))) {
        // we will need the base class.
        require_once $CFG->dirroot . '/blocks/moodleblock.class.php';
        foreach ($blocks as $block) {
            $blockfile = $CFG->dirroot . '/blocks/' . $block->name . '/block_' . $block->name . '.php';
            if (file_exists($blockfile)) {
                require_once $blockfile;
                $classname = 'block_' . $block->name;
                $blockobj = new $classname();
                if (method_exists($blockobj, 'cron')) {
                    mtrace("Processing cron function for " . $block->name . '....', '');
                    if ($blockobj->cron()) {
                        $DB->set_field('block', 'lastcron', $timenow, array('id' => $block->id));
                    }
                    /// Reset possible changes by blocks to time_limit. MDL-11597
                    @set_time_limit(0);
                    mtrace('done.');
                }
            }
        }
    }
    mtrace('Finished blocks');
    //now do plagiarism checks
    require_once $CFG->libdir . '/plagiarismlib.php';
    plagiarism_cron();
    mtrace("Starting quiz reports");
    if ($reports = $DB->get_records_select('quiz_report', "cron > 0 AND ((? - lastcron) > cron)", array($timenow))) {
        foreach ($reports as $report) {
            $cronfile = "{$CFG->dirroot}/mod/quiz/report/{$report->name}/cron.php";
            if (file_exists($cronfile)) {
                include_once $cronfile;
                $cron_function = 'quiz_report_' . $report->name . "_cron";
                if (function_exists($cron_function)) {
                    mtrace("Processing quiz report cron function {$cron_function} ...", '');
                    $pre_dbqueries = null;
                    $pre_dbqueries = $DB->perf_get_queries();
                    $pre_time = microtime(1);
                    if ($cron_function()) {
                        $DB->set_field('quiz_report', "lastcron", $timenow, array("id" => $report->id));
                    }
                    if (isset($pre_dbqueries)) {
                        mtrace("... used " . ($DB->perf_get_queries() - $pre_dbqueries) . " dbqueries");
                        mtrace("... used " . (microtime(1) - $pre_time) . " seconds");
                    }
                    mtrace("done.");
                }
            }
        }
    }
    mtrace("Finished quiz reports");
    mtrace('Starting admin reports');
    // Admin reports do not have a database table that lists them. Instead a
    // report includes cron.php with function report_reportname_cron() if it wishes
    // to be cronned. It is up to cron.php to handle e.g. if it only needs to
    // actually do anything occasionally.
    $reports = get_plugin_list('report');
    foreach ($reports as $report => $reportdir) {
        $cronfile = $reportdir . '/cron.php';
        if (file_exists($cronfile)) {
            require_once $cronfile;
            $cronfunction = 'report_' . $report . '_cron';
            mtrace('Processing cron function for ' . $report . '...', '');
            $pre_dbqueries = null;
            $pre_dbqueries = $DB->perf_get_queries();
            $pre_time = microtime(true);
            $cronfunction();
            if (isset($pre_dbqueries)) {
                mtrace("... used " . ($DB->perf_get_queries() - $pre_dbqueries) . " dbqueries");
                mtrace("... used " . round(microtime(true) - $pre_time, 2) . " seconds");
            }
            mtrace('done.');
        }
    }
    mtrace('Finished admin reports');
    mtrace('Starting main gradebook job ...');
    grade_cron();
    mtrace('done.');
    mtrace('Starting processing the event queue...');
    events_cron();
    mtrace('done.');
    if ($CFG->enablecompletion) {
        // Completion cron
        mtrace('Starting the completion cron...');
        require_once $CFG->libdir . '/completion/cron.php';
        completion_cron();
        mtrace('done');
    }
    if ($CFG->enableportfolios) {
        // Portfolio cron
        mtrace('Starting the portfolio cron...');
        require_once $CFG->libdir . '/portfoliolib.php';
        portfolio_cron();
        mtrace('done');
    }
    /// Run all core cron jobs, but not every time since they aren't too important.
    /// These don't have a timer to reduce load, so we'll use a random number
    /// to randomly choose the percentage of times we should run these jobs.
    srand((double) microtime() * 10000000);
    $random100 = rand(0, 100);
    if ($random100 < 20) {
        // Approximately 20% of the time.
        mtrace("Running clean-up tasks...");
        /// Delete users who haven't confirmed within required period
        if (!empty($CFG->deleteunconfirmed)) {
            $cuttime = $timenow - $CFG->deleteunconfirmed * 3600;
            $rs = $DB->get_recordset_sql("SELECT id, firstname, lastname\n                                             FROM {user}\n                                            WHERE confirmed = 0 AND firstaccess > 0\n                                                  AND firstaccess < ?", array($cuttime));
            foreach ($rs as $user) {
                if ($DB->delete_records('user', array('id' => $user->id))) {
                    mtrace("Deleted unconfirmed user for " . fullname($user, true) . " ({$user->id})");
                }
            }
            $rs->close();
        }
        flush();
        /// Delete users who haven't completed profile within required period
        if (!empty($CFG->deleteincompleteusers)) {
            $cuttime = $timenow - $CFG->deleteincompleteusers * 3600;
            $rs = $DB->get_recordset_sql("SELECT id, username\n                                             FROM {user}\n                                            WHERE confirmed = 1 AND lastaccess > 0\n                                                  AND lastaccess < ? AND deleted = 0\n                                                  AND (lastname = '' OR firstname = '' OR email = '')", array($cuttime));
            foreach ($rs as $user) {
                if (delete_user($user)) {
                    mtrace("Deleted not fully setup user {$user->username} ({$user->id})");
                }
            }
            $rs->close();
        }
        flush();
        /// Delete old logs to save space (this might need a timer to slow it down...)
        if (!empty($CFG->loglifetime)) {
            // value in days
            $loglifetime = $timenow - $CFG->loglifetime * 3600 * 24;
            if ($DB->delete_records_select("log", "time < ?", array($loglifetime))) {
                mtrace("Deleted old log records");
            }
        }
        flush();
        // Delete old backup_controllers and logs
        if (!empty($CFG->loglifetime)) {
            // value in days
            $loglifetime = $timenow - $CFG->loglifetime * 3600 * 24;
            // Delete child records from backup_logs
            $DB->execute("DELETE FROM {backup_logs}\n                           WHERE EXISTS (\n                               SELECT 'x'\n                                 FROM {backup_controllers} bc\n                                WHERE bc.backupid = {backup_logs}.backupid\n                                  AND bc.timecreated < ?)", array($loglifetime));
            // Delete records from backup_controllers
            $DB->execute("DELETE FROM {backup_controllers}\n                          WHERE timecreated < ?", array($loglifetime));
            mtrace("Deleted old backup records");
        }
        flush();
        /// Delete old cached texts
        if (!empty($CFG->cachetext)) {
            // Defined in config.php
            $cachelifetime = time() - $CFG->cachetext - 60;
            // Add an extra minute to allow for really heavy sites
            if ($DB->delete_records_select('cache_text', "timemodified < ?", array($cachelifetime))) {
                mtrace("Deleted old cache_text records");
            }
        }
        flush();
        if (!empty($CFG->notifyloginfailures)) {
            notify_login_failures();
            mtrace('Notified login failured');
        }
        flush();
        //
        // generate new password emails for users
        //
        mtrace('checking for create_password');
        if ($DB->count_records('user_preferences', array('name' => 'create_password', 'value' => '1'))) {
            mtrace('creating passwords for new users');
            $newusers = $DB->get_records_sql("SELECT u.id as id, u.email, u.firstname,\n                                                     u.lastname, u.username,\n                                                     p.id as prefid\n                                                FROM {user} u\n                                                JOIN {user_preferences} p ON u.id=p.userid\n                                               WHERE p.name='create_password' AND p.value='1' AND u.email !='' ");
            foreach ($newusers as $newuserid => $newuser) {
                // email user
                if (setnew_password_and_mail($newuser)) {
                    // remove user pref
                    $DB->delete_records('user_preferences', array('id' => $newuser->prefid));
                } else {
                    trigger_error("Could not create and mail new user password!");
                }
            }
        }
        if (!empty($CFG->usetags)) {
            require_once $CFG->dirroot . '/tag/lib.php';
            tag_cron();
            mtrace('Executed tag cron');
        }
        // Accesslib stuff
        cleanup_contexts();
        mtrace('Cleaned up contexts');
        gc_cache_flags();
        mtrace('Cleaned cache flags');
        // If you suspect that the context paths are somehow corrupt
        // replace the line below with: build_context_path(true);
        build_context_path();
        mtrace('Built context paths');
        if (!empty($CFG->messagingdeletereadnotificationsdelay)) {
            $notificationdeletetime = time() - $CFG->messagingdeletereadnotificationsdelay;
            $DB->delete_records_select('message_read', 'notification=1 AND timeread<:notificationdeletetime', array('notificationdeletetime' => $notificationdeletetime));
            mtrace('Cleaned up read notifications');
        }
        mtrace("Finished clean-up tasks...");
    }
    // End of occasional clean-up tasks
    // Run automated backups if required.
    require_once $CFG->dirroot . '/backup/util/includes/backup_includes.php';
    require_once $CFG->dirroot . '/backup/util/helper/backup_cron_helper.class.php';
    backup_cron_automated_helper::run_automated_backup();
    /// Run the auth cron, if any
    /// before enrolments because it might add users that will be needed in enrol plugins
    $auths = get_enabled_auth_plugins();
    mtrace("Running auth crons if required...");
    foreach ($auths as $auth) {
        $authplugin = get_auth_plugin($auth);
        if (method_exists($authplugin, 'cron')) {
            mtrace("Running cron for auth/{$auth}...");
            $authplugin->cron();
            if (!empty($authplugin->log)) {
                mtrace($authplugin->log);
            }
        }
        unset($authplugin);
    }
    mtrace("Running enrol crons if required...");
    $enrols = enrol_get_plugins(true);
    foreach ($enrols as $ename => $enrol) {
        // do this for all plugins, disabled plugins might want to cleanup stuff such as roles
        if (!$enrol->is_cron_required()) {
            continue;
        }
        mtrace("Running cron for enrol_{$ename}...");
        $enrol->cron();
        $enrol->set_config('lastcron', time());
    }
    if (!empty($CFG->enablestats) and empty($CFG->disablestatsprocessing)) {
        require_once $CFG->dirroot . '/lib/statslib.php';
        // check we're not before our runtime
        $timetocheck = stats_get_base_daily() + $CFG->statsruntimestarthour * 60 * 60 + $CFG->statsruntimestartminute * 60;
        if (time() > $timetocheck) {
            // process configured number of days as max (defaulting to 31)
            $maxdays = empty($CFG->statsruntimedays) ? 31 : abs($CFG->statsruntimedays);
            if (stats_cron_daily($maxdays)) {
                if (stats_cron_weekly()) {
                    if (stats_cron_monthly()) {
                        stats_clean_old();
                    }
                }
            }
            @set_time_limit(0);
        } else {
            mtrace('Next stats run after:' . userdate($timetocheck));
        }
    }
    // run gradebook import/export/report cron
    if ($gradeimports = get_plugin_list('gradeimport')) {
        foreach ($gradeimports as $gradeimport => $plugindir) {
            if (file_exists($plugindir . '/lib.php')) {
                require_once $plugindir . '/lib.php';
                $cron_function = 'grade_import_' . $gradeimport . '_cron';
                if (function_exists($cron_function)) {
                    mtrace("Processing gradebook import function {$cron_function} ...", '');
                    $cron_function();
                }
            }
        }
    }
    if ($gradeexports = get_plugin_list('gradeexport')) {
        foreach ($gradeexports as $gradeexport => $plugindir) {
            if (file_exists($plugindir . '/lib.php')) {
                require_once $plugindir . '/lib.php';
                $cron_function = 'grade_export_' . $gradeexport . '_cron';
                if (function_exists($cron_function)) {
                    mtrace("Processing gradebook export function {$cron_function} ...", '');
                    $cron_function();
                }
            }
        }
    }
    if ($gradereports = get_plugin_list('gradereport')) {
        foreach ($gradereports as $gradereport => $plugindir) {
            if (file_exists($plugindir . '/lib.php')) {
                require_once $plugindir . '/lib.php';
                $cron_function = 'grade_report_' . $gradereport . '_cron';
                if (function_exists($cron_function)) {
                    mtrace("Processing gradebook report function {$cron_function} ...", '');
                    $cron_function();
                }
            }
        }
    }
    // Run external blog cron if needed
    if ($CFG->useexternalblogs) {
        require_once $CFG->dirroot . '/blog/lib.php';
        mtrace("Fetching external blog entries...", '');
        $sql = "timefetched < ? OR timefetched = 0";
        $externalblogs = $DB->get_records_select('blog_external', $sql, array(mktime() - $CFG->externalblogcrontime));
        foreach ($externalblogs as $eb) {
            blog_sync_external_entries($eb);
        }
    }
    // Run blog associations cleanup
    if ($CFG->useblogassociations) {
        require_once $CFG->dirroot . '/blog/lib.php';
        // delete entries whose contextids no longer exists
        mtrace("Deleting blog associations linked to non-existent contexts...", '');
        $DB->delete_records_select('blog_association', 'contextid NOT IN (SELECT id FROM {context})');
    }
    //Run registration updated cron
    mtrace(get_string('siteupdatesstart', 'hub'));
    require_once $CFG->dirroot . '/admin/registration/lib.php';
    $registrationmanager = new registration_manager();
    $registrationmanager->cron();
    mtrace(get_string('siteupdatesend', 'hub'));
    // cleanup file trash
    $fs = get_file_storage();
    $fs->cron();
    //cleanup old session linked tokens
    //deletes the session linked tokens that are over a day old.
    mtrace("Deleting session linked tokens more than one day old...", '');
    $DB->delete_records_select('external_tokens', 'lastaccess < :onedayago AND tokentype = :tokentype', array('onedayago' => time() - DAYSECS, 'tokentype' => EXTERNAL_TOKEN_EMBEDDED));
    mtrace('done.');
    // run any customized cronjobs, if any
    if ($locals = get_plugin_list('local')) {
        mtrace('Processing customized cron scripts ...', '');
        foreach ($locals as $local => $localdir) {
            if (file_exists("{$localdir}/cron.php")) {
                include "{$localdir}/cron.php";
            }
        }
        mtrace('done.');
    }
    mtrace("Cron script completed correctly");
    $difftime = microtime_diff($starttime, microtime());
    mtrace("Execution took " . $difftime . " seconds");
}