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<?php
/**
* Elgg notifications plugin
*
* @package ElggNotifications
*/
elgg_register_event_handler('init', 'system', 'notifications_plugin_init');
function notifications_plugin_init() {
elgg_extend_view('css/elgg','notifications/css');
elgg_register_page_handler('notifications', 'notifications_page_handler');
elgg_register_event_handler('pagesetup', 'system', 'notifications_plugin_pagesetup');
// Unset the default notification settings
elgg_unregister_plugin_hook_handler('usersettings:save', 'user', 'notification_user_settings_save');
elgg_unextend_view('forms/account/settings', 'core/settings/account/notifications');
// update notifications based on relationships changing
elgg_register_event_handler('delete', 'member', 'notifications_relationship_remove');
elgg_register_event_handler('delete', 'friend', 'notifications_relationship_remove');
// update notifications when new friend or access collection membership
elgg_register_event_handler('create', 'friend', 'notifications_update_friend_notify');
elgg_register_plugin_hook_handler('access:collections:add-user', 'collection', 'notifications_update_collection_notify');
$actions_base = elgg_get_plugins_path() . 'notifications/actions';
elgg_register_action("notificationsettings/save", "$actions_base/save.php");
elgg_register_action("notificationsettings/groupsave", "$actions_base/groupsave.php");
}
/**
* Route page requests
*
* @param array $page Array of url parameters
*/
function notifications_page_handler($page) {
// default to personal notifications
if (!isset($page[0])) {
$page[0] = 'personal';
}
$base = elgg_get_plugins_path() . 'notifications';
switch ($page[0]) {
case 'group':
require "$base/groups.php";
break;
case 'personal':
default:
require "$base/index.php";
break;
}
return TRUE;
}
/**
* Notification settings sidebar menu
*
*/
function notifications_plugin_pagesetup() {
if (elgg_get_context() == "settings" && elgg_get_logged_in_user_guid()) {
$user = elgg_get_logged_in_user_entity();
$params = array(
'name' => '2_a_user_notify',
'text' => elgg_echo('notifications:subscriptions:changesettings'),
'href' => "notifications/personal",
);
elgg_register_menu_item('page', $params);
if (elgg_is_active_plugin('groups')) {
$params = array(
'name' => '2_group_notify',
'text' => elgg_echo('notifications:subscriptions:changesettings:groups'),
'href' => "notifications/group",
);
elgg_register_menu_item('page', $params);
}
}
}
/**
* 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);
}
}
/**
* Turn on notifications for new friends if all friend notifications is on
*
* @param string $event
* @param string $object_type
* @param object $relationship
*/
function notifications_update_friend_notify($event, $object_type, $relationship) {
global $NOTIFICATION_HANDLERS;
$user_guid = $relationship->guid_one;
$friend_guid = $relationship->guid_two;
$user = get_entity($user_guid);
// loop through all notification types
foreach ($NOTIFICATION_HANDLERS as $method => $foo) {
$metaname = 'collections_notifications_preferences_' . $method;
$collections_preferences = $user->$metaname;
if ($collections_preferences) {
if (!empty($collections_preferences) && !is_array($collections_preferences)) {
$collections_preferences = array($collections_preferences);
}
if (is_array($collections_preferences)) {
// -1 means all friends is on - should be a define
if (in_array(-1, $collections_preferences)) {
add_entity_relationship($user_guid, 'notify' . $method, $friend_guid);
}
}
}
}
}
/**
* Update notifications for changes in access collection membership.
*
* This function assumes that only friends can belong to access collections.
*
* @param string $event
* @param string $object_type
* @param bool $returnvalue
* @param array $params
*/
function notifications_update_collection_notify($event, $object_type, $returnvalue, $params) {
global $NOTIFICATION_HANDLERS;
// only update notifications for user owned collections
$collection_id = $params['collection_id'];
$collection = get_access_collection($collection_id);
$user = get_entity($collection->owner_guid);
if (!($user instanceof ElggUser)) {
return $returnvalue;
}
$member_guid = $params['user_guid'];
// loop through all notification types
foreach ($NOTIFICATION_HANDLERS as $method => $foo) {
$metaname = 'collections_notifications_preferences_' . $method;
$collections_preferences = $user->$metaname;
if (!$collections_preferences) {
continue;
}
if (!is_array($collections_preferences)) {
$collections_preferences = array($collections_preferences);
}
if (in_array(-1, $collections_preferences)) {
// if "all friends" notify is on, we don't change any notifications
// since must be a friend to be in an access collection
continue;
}
if (in_array($collection_id, $collections_preferences)) {
// notifications are on for this collection so we add/remove
if ($event == 'access:collections:add-user') {
add_entity_relationship($user->guid, "notify$method", $member_guid);
} elseif ($event == 'access:collections:remove_user') {
// removing someone from an access collection is not a guarantee
// that they should be removed from notifications
//remove_entity_relationship($user->guid, "notify$method", $member_guid);
}
}
}
}
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