/**
* Remove all event handlers and queued events
*
* @category event
* @param string $component examples: 'moodle', 'mod_forum', 'block_quiz_results'
*/
function events_uninstall($component)
{
$cachedhandlers = events_get_cached($component);
events_cleanup($component, $cachedhandlers);
events_get_handlers('reset');
}
/**
* Updates all of the event definitions within the database.
*
* Unfortunately this isn't as simple as removing them all and then readding
* the updated event definitions. Chances are queued items are referencing the
* existing definitions.
*
* Note that the absence of the db/events.php event definition file
* will cause any queued events for the component to be removed from
* the database.
*
* @category event
* @deprecated since Moodle 3.1
* @param string $component examples: 'moodle', 'mod_forum', 'block_quiz_results'
* @return boolean always returns true
*/
function events_update_definition($component = 'moodle')
{
global $DB;
// load event definition from events.php
$filehandlers = events_load_def($component);
if ($filehandlers) {
debugging('Events API using $handlers array has been deprecated in favour of Events 2 API, please use it instead.', DEBUG_DEVELOPER);
}
// load event definitions from db tables
// if we detect an event being already stored, we discard from this array later
// the remaining needs to be removed
$cachedhandlers = events_get_cached($component);
foreach ($filehandlers as $eventname => $filehandler) {
if (!empty($cachedhandlers[$eventname])) {
if ($cachedhandlers[$eventname]['handlerfile'] === $filehandler['handlerfile'] && $cachedhandlers[$eventname]['handlerfunction'] === serialize($filehandler['handlerfunction']) && $cachedhandlers[$eventname]['schedule'] === $filehandler['schedule'] && $cachedhandlers[$eventname]['internal'] == $filehandler['internal']) {
// exact same event handler already present in db, ignore this entry
unset($cachedhandlers[$eventname]);
continue;
} else {
// same event name matches, this event has been updated, update the datebase
$handler = new stdClass();
$handler->id = $cachedhandlers[$eventname]['id'];
$handler->handlerfile = $filehandler['handlerfile'];
$handler->handlerfunction = serialize($filehandler['handlerfunction']);
// static class methods stored as array
$handler->schedule = $filehandler['schedule'];
$handler->internal = $filehandler['internal'];
$DB->update_record('events_handlers', $handler);
unset($cachedhandlers[$eventname]);
continue;
}
} else {
// if we are here, this event handler is not present in db (new)
// add it
$handler = new stdClass();
$handler->eventname = $eventname;
$handler->component = $component;
$handler->handlerfile = $filehandler['handlerfile'];
$handler->handlerfunction = serialize($filehandler['handlerfunction']);
// static class methods stored as array
$handler->schedule = $filehandler['schedule'];
$handler->status = 0;
$handler->internal = $filehandler['internal'];
$DB->insert_record('events_handlers', $handler);
}
}
// clean up the left overs, the entries in cached events array at this points are deprecated event handlers
// and should be removed, delete from db
events_cleanup($component, $cachedhandlers);
events_get_handlers('reset');
return true;
}