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<?php
/**
* Handle user email batch ( daily/weekly ) for database storage
*/
class MWDbEchoEmailBatch extends MWEchoEmailBatch {
/**
* Set the last event of this batch, this is a cutoff point for clearing
* processed/invalid events
*
* @return bool true if event exists false otherwise
*/
protected function setLastEvent() {
$dbr = MWEchoDbFactory::getDB( DB_SLAVE );
$res = $dbr->selectField(
array( 'echo_email_batch' ),
array( 'MAX( eeb_event_id )' ),
array( 'eeb_user_id' => $this->mUser->getId() ),
__METHOD__
);
if ( $res ) {
$this->lastEvent = $res;
return true;
} else {
return false;
}
}
/**
* Get the events queued for the current user
* @return array
*/
protected function getEvents() {
global $wgEchoNotifications;
$events = array();
$validEvents = array_keys( $wgEchoNotifications );
// Per the tech discussion in the design meeting (03/22/2013), since this is
// processed by a cron job, it's okay to use GROUP BY over more complex
// composite index, favor insert performance, storage space over read
// performance in this case
if ( $validEvents ) {
$dbr = MWEchoDbFactory::getDB( DB_SLAVE );
$conds = array(
'eeb_user_id' => $this->mUser->getId(),
'event_id = eeb_event_id',
'event_type' => $validEvents
);
// See setLastEvent() for more detail for this variable
if ( $this->lastEvent ) {
$conds[] = 'eeb_event_id <= ' . intval( $this->lastEvent );
}
$res = $dbr->select(
array( 'echo_email_batch', 'echo_event' ),
array( '*' ),
$conds,
__METHOD__,
array(
'ORDER BY' => 'eeb_event_priority',
'LIMIT' => self::$displaySize + 1,
'GROUP BY' => 'eeb_event_hash'
)
);
foreach ( $res as $row ) {
// records in the queue inserted before email bundling code
// have no hash, in this case, we just ignore them
if ( $row->eeb_event_hash ) {
$events[$row->eeb_id] = $row;
}
}
}
return $events;
}
/**
* Clear "processed" events in the queue, processed could be: email sent, invalid, users do not want to receive emails
*/
public function clearProcessedEvent() {
$conds = array( 'eeb_user_id' => $this->mUser->getId() );
// there is a processed cutoff point
if ( $this->lastEvent ) {
$conds[] = 'eeb_event_id <= ' . intval( $this->lastEvent );
}
$dbw = MWEchoDbFactory::getDB( DB_MASTER );
$dbw->delete(
'echo_email_batch',
$conds,
__METHOD__,
array()
);
}
/**
* Insert notification event into email queue
* @param $userId int
* @param $eventId int
* @param $priority int
* @param $hash string
*/
public static function actuallyAddToQueue( $userId, $eventId, $priority, $hash ) {
if ( !$userId || !$eventId ) {
return;
}
$dbw = MWEchoDbFactory::getDB( DB_MASTER );
$row = array(
'eeb_user_id' => $userId,
'eeb_event_id' => $eventId,
'eeb_event_priority' => $priority,
'eeb_event_hash' => $hash
);
$id = $dbw->nextSequenceValue( 'echo_email_batch_eeb_id' );
if ( $id ) {
$row['eeb_id'] = $id;
}
$dbw->insert(
'echo_email_batch',
$row,
__METHOD__,
array( 'IGNORE' )
);
}
/**
* Get a list of users to be notified for the batch
*
* @param $startUserId int
* @param $batchSize int
*
* @return ResultWrapper|bool
*/
public static function actuallyGetUsersToNotify( $startUserId, $batchSize ) {
$dbr = MWEchoDbFactory::getDB( DB_SLAVE );
$res = $dbr->select(
array( 'echo_email_batch' ),
array( 'eeb_user_id' ),
array( 'eeb_user_id > ' . $startUserId ),
__METHOD__,
array( 'ORDER BY' => 'eeb_user_id', 'LIMIT' => $batchSize )
);
return $res;
}
}
|
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