<?php

/**
 * Elgg notifications plugin
 *
 * @package ElggNotifications
 * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
 * @author Curverider Ltd
 * @copyright Curverider Ltd 2008-2010
 * @link http://elgg.com/
 */


function notifications_plugin_init() {
	global $CONFIG;

	elgg_extend_view('css','notifications/css');

	register_page_handler('notifications', 'notifications_page_handler');

	register_elgg_event_handler('pagesetup', 'system', 'notifications_plugin_pagesetup');

	// Unset the default notification settings
	unregister_plugin_hook('usersettings:save', 'user', 'notification_user_settings_save');
	elgg_unextend_view('usersettings/user', 'notifications/settings/usersettings');

	// update notifications based on relationships changing
	register_elgg_event_handler('delete', 'member', 'notifications_relationship_remove');
	register_elgg_event_handler('delete', 'friend', 'notifications_relationship_remove');
}

/**
 * Route page requests
 *
 * @param array $page Array of url parameters
 */
function notifications_page_handler($page) {
	global $CONFIG;

	// default to personal notifications
	if (!isset($page[0])) {
		$page[0] = 'personal';
	}

	switch ($page[0]) {
		case 'group':
			require $CONFIG->pluginspath . "notifications/groups.php";
			break;
		case 'personal':
		default:
			require $CONFIG->pluginspath . "notifications/index.php";
			break;
	}

	return TRUE;
}

/**
 * Notification settings sidebar menu
 *
 */
function notifications_plugin_pagesetup() {
	global $CONFIG;
	if (get_context() == 'settings') {
		add_submenu_item(elgg_echo('notifications:subscriptions:changesettings'), $CONFIG->wwwroot . "pg/notifications/personal");
		if (is_plugin_enabled('groups')) {
			add_submenu_item(elgg_echo('notifications:subscriptions:changesettings:groups'), $CONFIG->wwwroot . "pg/notifications/group");
		}
	}
}

/**
 * Update notifications when a relationship is deleted
 *
 * @param string $event
 * @param string $object_type
 * @param object $relationship
 */
function notifications_relationship_remove($event, $object_type, $relationship) {
	global $NOTIFICATION_HANDLERS;

	$user_guid = $relationship->guid_one;
	$object_guid = $relationship->guid_two;

	// loop through all notification types
	foreach($NOTIFICATION_HANDLERS as $method => $foo) {
		remove_entity_relationship($user_guid, "notify{$method}", $object_guid);
	}
}


register_elgg_event_handler('init', 'system', 'notifications_plugin_init', 1000);


register_action("notificationsettings/save", FALSE, $CONFIG->pluginspath . "notifications/actions/save.php");
register_action("notificationsettings/groupsave", FALSE, $CONFIG->pluginspath . "notifications/actions/groupsave.php");