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https://gerrit.wikimedia.org/r/mediawiki/extensions/Echo
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NotifUser: Reduce queries in resetNotificationCount() by hackily computing some values from others
Change-Id: Id349ac91c7ed8f308fce327bbf5f5e5f088b7935
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@ -440,30 +440,48 @@ class MWEchoNotifUser {
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* @param $dbSource int use master or slave database to pull count
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*/
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public function resetNotificationCount( $dbSource = DB_SLAVE ) {
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// TODO: Reuse information while recomputing these values. all=alert+messages and global=local+foreign
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// Reset notification count for all sections
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$this->getNotificationCount( false, $dbSource, EchoAttributeManager::ALL, false );
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// Reset alert and message counts, and store them for later
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$alertCount = $this->getNotificationCount( false, $dbSource, EchoAttributeManager::ALERT, false );
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$msgCount = $this->getNotificationCount( false, $dbSource, EchoAttributeManager::MESSAGE, false );
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// Reset global notification counts too
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// We're going to update echo_unread_wikis in a DeferredUpdate below, but that doesn't
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// affect the results of this computation, because we're only updating the echo_unread_wikis
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// row for the current wiki, which is ignored by the recomputation code
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$this->getNotificationCount( false, $dbSource, EchoAttributeManager::ALL, true );
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$this->getNotificationCount( false, $dbSource, EchoAttributeManager::ALERT, true );
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$this->getNotificationCount( false, $dbSource, EchoAttributeManager::MESSAGE, true );
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// For performance, compute the ALL count by adding alerts and messages
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$allCount = $alertCount + $msgCount;
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// For performance, compute the global counts by adding foreign counts to the above
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$globalAlertCount = $alertCount + $this->getForeignNotifications()->getCount( EchoAttributeManager::ALERT );
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$globalMsgCount = $msgCount + $this->getForeignNotifications()->getCount( EchoAttributeManager::MESSAGE );
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$globalAllCount = $globalAlertCount + $globalMsgCount;
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// When notification counts need to be updated, the last notification may have changed,
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// so we also need to recompute the cached timestamp values.
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$this->getLastUnreadNotificationTime( false, $dbSource, EchoAttributeManager::ALL, false );
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$alertUnread = $this->getLastUnreadNotificationTime( false, $dbSource, EchoAttributeManager::ALERT, false );
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$msgUnread = $this->getLastUnreadNotificationTime( false, $dbSource, EchoAttributeManager::MESSAGE, false );
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// Also recompute the global timestamps
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$this->getLastUnreadNotificationTime( false, $dbSource, EchoAttributeManager::ALL, true );
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$this->getLastUnreadNotificationTime( false, $dbSource, EchoAttributeManager::ALERT, true );
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$this->getLastUnreadNotificationTime( false, $dbSource, EchoAttributeManager::MESSAGE, true );
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// For performance, compute the ALL count as the highest of these two
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$allUnread = $alertUnread !== false &&
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( $msgUnread === false || $alertUnread->diff( $msgUnread )->invert === 1 ) ?
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$alertUnread : $msgUnread;
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// For performance, compute the global timestamps as max( localTimestamp, foreignTimestamp )
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$foreignAlertUnread = $this->getForeignNotifications()->getTimestamp( EchoAttributeManager::ALERT );
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$globalAlertUnread = $alertUnread !== false &&
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( $foreignAlertUnread === false || $alertUnread->diff( $foreignAlertUnread )->invert === 1 ) ?
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$alertUnread : $foreignAlertUnread;
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$foreignMsgUnread = $this->getForeignNotifications()->getTimestamp( EchoAttributeManager::MESSAGE );
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$globalMsgUnread = $msgUnread !== false &&
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( $foreignMsgUnread === false || $msgUnread->diff( $foreignMsgUnread )->invert === 1 ) ?
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$msgUnread : $foreignMsgUnread;
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$globalAllUnread = $globalAlertUnread !== false &&
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( $globalMsgUnread === false || $globalAlertUnread->diff( $globalMsgUnread )->invert === 1 ) ?
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$globalAlertUnread : $globalMsgUnread;
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// Write computed values to cache
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$this->cache->set( $this->getMemcKey( 'echo-notification-count' ), $allCount, 86400 );
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$this->cache->set( $this->getGlobalMemcKey( 'echo-notification-count-alert' ), $globalAlertCount, 86400 );
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$this->cache->set( $this->getGlobalMemcKey( 'echo-notification-count-message' ), $globalMsgCount, 86400 );
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$this->cache->set( $this->getGlobalMemcKey( 'echo-notification-count' ), $globalAllCount, 86400 );
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$this->cache->set( $this->getMemcKey( 'echo-notification-timestamp', $allUnread === false ? -1 : $allUnread->getTimestamp( TS_MW ) ), 86400 );
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$this->cache->set( $this->getGlobalMemcKey( 'echo-notification-timestamp-alert' ), $globalAlertUnread === false ? -1 : $globalAlertUnread->getTimestamp( TS_MW ), 86400 );
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$this->cache->set( $this->getGlobalMemcKey( 'echo-notification-timestamp-message' ), $globalMsgUnread === false ? -1 : $globalMsgUnread->getTimestamp( TS_MW ), 86400 );
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$this->cache->set( $this->getGlobalMemcKey( 'echo-notification-timestamp' ), $globalAllUnread === false ? -1 : $globalAllUnread->getTimestamp( TS_MW ), 86400 );
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// Invalidate the user's cache
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$user = $this->mUser;
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