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File: NotificationManagerDelegate.inc.php
<?php

/**
 * @file classes/notification/NotificationManagerDelegate.inc.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2003-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class NotificationManagerDelegate
 * @ingroup notification
 *
 * @brief Abstract class to support notification manager delegates
 * that provide default implementation to the interface that defines
 * notification presentation data. It also introduce a method to be
 * extended by subclasses to update notification objects.
 */

import('lib.pkp.classes.notification.PKPNotificationOperationManager');

abstract class NotificationManagerDelegate extends PKPNotificationOperationManager {

	/** @var int NOTIFICATION_TYPE_... */
	private $_notificationType;

	/**
	 * Constructor.
	 * @param $notificationType int NOTIFICATION_TYPE_...
	 */
	function __construct($notificationType) {
		$this->_notificationType = $notificationType;
	}

	/**
	 * Get the current notification type this manager is handling.
	 * @return int NOTIFICATION_TYPE_...
	 */
	function getNotificationType() {
		return $this->_notificationType;
	}

	/**
	 * Define operations to update notifications.
	 * @param $request PKPRequest Request object
	 * @param $userIds array List of user IDs to notify
	 * @param $assocType int ASSOC_TYPE_...
	 * @param $assocId int ID corresponding to $assocType
	 * @return boolean True iff success
	 */
	function updateNotification($request, $userIds, $assocType, $assocId) {
		return false;
	}

	/**
	 * Check if this manager delegate can handle the
	 * creation of the passed notification type.
	 * @copydoc PKPNotificationOperationManager::createNotification()
	 */
	function createNotification($request, $userId = null, $notificationType = null, $contextId = null, $assocType = null, $assocId = null, $level = NOTIFICATION_LEVEL_NORMAL, $params = null, $suppressEmail = false, callable $mailConfigurator = null) {
		assert($notificationType == $this->getNotificationType() || $this->multipleTypesUpdate());
		return parent::createNotification($request, $userId, $notificationType, $contextId, $assocType, $assocId, $level, $params, $suppressEmail, $mailConfigurator);
	}

	/**
	 * Flag a notification manager that handles multiple notification
	 * types inside the update method within the same call. Only set
	 * this to true if you're sure the notification manager provides
	 * all information for all notification types you're handling (via
	 * the getNotification... methods).
	 * @return boolean
	 */
	protected function multipleTypesUpdate() {
		return false;
	}
}