mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Echo
synced 2024-11-15 03:35:01 +00:00
313 lines
8.7 KiB
PHP
313 lines
8.7 KiB
PHP
<?php
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/**
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* Database mapper for EchoNotification model
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*/
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class EchoNotificationMapper extends EchoAbstractMapper {
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/**
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* @var EchoTargetPageMapper
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*/
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protected $targetPageMapper;
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public function __construct(
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MWEchoDbFactory $dbFactory = null,
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EchoTargetPageMapper $targetPageMapper = null
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) {
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parent::__construct( $dbFactory );
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if ( $targetPageMapper === null ) {
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$targetPageMapper = new EchoTargetPageMapper( $this->dbFactory );
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}
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$this->targetPageMapper = $targetPageMapper;
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}
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/**
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* Insert a notification record
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* @param EchoNotification
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* @return null
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*/
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public function insert( EchoNotification $notification ) {
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$dbw = $this->dbFactory->getEchoDb( DB_MASTER );
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$fname = __METHOD__;
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$row = $notification->toDbArray();
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$listeners = $this->getMethodListeners( __FUNCTION__ );
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$dbw->onTransactionIdle( function() use ( $dbw, $row, $fname, $listeners ) {
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$dbw->startAtomic( $fname );
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// reset the bundle base if this notification has a display hash
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// the result of this operation is that all previous notifications
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// with the same display hash are set to non-base because new record
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// is becoming the bundle base
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if ( $row['notification_bundle_display_hash'] ) {
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$dbw->update(
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'echo_notification',
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array( 'notification_bundle_base' => 0 ),
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array(
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'notification_user' => $row['notification_user'],
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'notification_bundle_display_hash' => $row['notification_bundle_display_hash'],
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'notification_bundle_base' => 1
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),
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$fname
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);
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}
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$row['notification_timestamp'] = $dbw->timestamp( $row['notification_timestamp'] );
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$res = $dbw->insert( 'echo_notification', $row, $fname );
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$dbw->endAtomic( $fname );
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if ( $res ) {
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foreach ( $listeners as $listener ) {
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call_user_func( $listener );
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}
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}
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} );
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}
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/**
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* Extract the offset used for notification list
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* @param $continue String Used for offset
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* @throws MWException
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* @return int[]
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*/
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protected function extractQueryOffset( $continue ) {
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$offset = array (
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'timestamp' => 0,
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'offset' => 0,
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);
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if ( $continue ) {
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$values = explode( '|', $continue, 3 );
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if ( count( $values ) !== 2 ) {
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throw new MWException( 'Invalid continue param: ' . $continue );
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}
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$offset['timestamp'] = (int)$values[0];
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$offset['offset'] = (int)$values[1];
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}
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return $offset;
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}
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/**
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* Get unread notifications by user in the amount specified by limit order by
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* notification timestamp in descending order. We have an index to retrieve
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* unread notifications but it's not optimized for ordering by timestamp. The
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* descending order is only allowed if we keep the notification in low volume,
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* which is done via a deleteJob
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* @param User $user
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* @param int $limit
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* @param string[] $eventTypes
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* @return EchoNotification[]
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*/
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public function fetchUnreadByUser( User $user, $limit, array $eventTypes = array() ) {
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$data = array();
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if ( !$eventTypes ) {
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return $data;
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}
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$dbr = $this->dbFactory->getEchoDb( DB_SLAVE );
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$res = $dbr->select(
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array( 'echo_notification', 'echo_event' ),
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'*',
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array(
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'notification_user' => $user->getID(),
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'event_type' => $eventTypes,
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'notification_bundle_base' => 1,
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'notification_read_timestamp' => NULL
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),
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__METHOD__,
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array(
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'LIMIT' => $limit,
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'ORDER BY' => 'notification_timestamp DESC'
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),
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array(
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'echo_event' => array( 'LEFT JOIN', 'notification_event=event_id' ),
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)
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);
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if ( $res ) {
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foreach ( $res as $row ) {
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$data[$row->event_id] = EchoNotification::newFromRow( $row );
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}
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}
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return $data;
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}
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/**
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* Get Notification by user in batch along with limit, offset etc
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*
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* @param User $user the user to get notifications for
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* @param int $limit The maximum number of notifications to return
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* @param string $continue Used for offset
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* @param array $eventTypes Event types to load
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* @param array $excludeEventIds Event id's to exclude.
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* @return EchoNotification[]
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*/
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public function fetchByUser( User $user, $limit, $continue, array $eventTypes = array(), array $excludeEventIds = array() ) {
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$dbr = $this->dbFactory->getEchoDb( DB_SLAVE );
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if ( !$eventTypes ) {
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return array();
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}
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// There is a problem with querying by event type, if a user has only one or none
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// flow notification and huge amount other notications, the lookup of only flow
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// notification will result in a slow query. Luckily users won't have that many
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// notifications. We should have some cron job to remove old notifications so
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// the notification volume is in a reasonable amount for such case. The other option
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// is to denormalize notification table with event_type and lookup index.
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//
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// Look for notifications with base = 1
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$conds = array(
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'notification_user' => $user->getID(),
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'event_type' => $eventTypes,
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'notification_bundle_base' => 1
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);
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if ( $excludeEventIds ) {
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$conds[] = 'event_id NOT IN ( ' . $dbr->makeList( $excludeEventIds ) . ' ) ';
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}
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$offset = $this->extractQueryOffset( $continue );
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// Start points are specified
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if ( $offset['timestamp'] && $offset['offset'] ) {
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$ts = $dbr->addQuotes( $dbr->timestamp( $offset['timestamp'] ) );
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// The offset and timestamp are those of the first notification we want to return
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$conds[] = "notification_timestamp < $ts OR ( notification_timestamp = $ts AND notification_event <= " . $offset['offset'] . " )";
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}
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$res = $dbr->select(
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array( 'echo_notification', 'echo_event', 'echo_target_page' ),
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'*',
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$conds,
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__METHOD__,
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array(
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'ORDER BY' => 'notification_timestamp DESC, notification_event DESC',
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'LIMIT' => $limit,
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),
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array(
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'echo_event' => array( 'LEFT JOIN', 'notification_event=event_id' ),
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'echo_target_page' => array( 'LEFT JOIN', array( 'notification_event=etp_event', 'notification_user=etp_user' ) ),
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)
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);
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// query failure of some sort
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if ( !$res ) {
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return array();
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}
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$events = array();
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foreach ( $res as $row ) {
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$events[$row->event_id] = $row;
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}
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// query returned no events
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if ( !$events ) {
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return array();
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}
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$targetPages = $this->targetPageMapper->fetchByUserPageId( $user, array_keys( $events ) );
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$data = array();
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foreach ( $events as $eventId => $row ) {
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try {
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if ( isset( $targetPages[$row->event_id] ) ) {
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$targets = $targetPages[$row->event_id];
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} else {
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$targets = null;
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}
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$data[$row->event_id] = EchoNotification::newFromRow( $row, $targets );
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} catch ( Exception $e ) {
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$id = isset( $row->event_id ) ? $row->event_id : 'unknown event';
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wfDebugLog( 'Echo', __METHOD__ . ": Failed initializing event: $id" );
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MWExceptionHandler::logException( $e );
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}
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}
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return $data;
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}
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/**
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* Get the last notification in a set of bundle-able notifications by a bundle hash
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* @param User
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* @param string The hash used to identify a set of bundle-able notifications
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* @return EchoNotification|bool
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*/
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public function fetchNewestByUserBundleHash( User $user, $bundleHash ) {
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$dbr = $this->dbFactory->getEchoDb( DB_SLAVE );
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$row = $dbr->selectRow(
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array( 'echo_notification', 'echo_event' ),
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array( '*' ),
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array(
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'notification_user' => $user->getId(),
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'notification_bundle_hash' => $bundleHash
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),
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__METHOD__,
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array( 'ORDER BY' => 'notification_timestamp DESC', 'LIMIT' => 1 ),
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array(
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'echo_event' => array( 'LEFT JOIN', 'notification_event=event_id' ),
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)
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);
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if ( $row ) {
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return EchoNotification::newFromRow( $row );
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} else {
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return false;
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}
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}
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/**
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* Fetch a notification by user in the specified offset. The caller should
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* know that passing a big number for offset is NOT going to work
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* @param User $user
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* @param int $offset
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* @return EchoNotification|bool
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*/
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public function fetchByUserOffset( User $user, $offset ) {
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$dbr = $this->dbFactory->getEchoDb( DB_SLAVE );
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$row = $dbr->selectRow(
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array( 'echo_notification', 'echo_event' ),
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array( '*' ),
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array(
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'notification_user' => $user->getId(),
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'notification_bundle_base' => 1
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),
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__METHOD__,
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array(
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'ORDER BY' => 'notification_timestamp DESC, notification_event DESC',
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'OFFSET' => $offset,
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'LIMIT' => 1
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),
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array(
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'echo_event' => array( 'LEFT JOIN', 'notification_event=event_id' ),
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)
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);
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if ( $row ) {
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return EchoNotification::newFromRow( $row );
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} else {
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return false;
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}
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}
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/**
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* Batch delete notifications by user and eventId offset
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* @param User $user
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* @param int $eventId
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* @return boolean
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*/
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public function deleteByUserEventOffset( User $user, $eventId ) {
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$dbw = $this->dbFactory->getEchoDb( DB_MASTER );
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$res = $dbw->delete(
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'echo_notification',
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array(
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'notification_user' => $user->getId(),
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'notification_event < ' . (int)$eventId
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),
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__METHOD__
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);
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return $res;
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}
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}
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