<?php
/**
 * Invite a user to join a group
 *
 * @package ElggGroups
 */

$logged_in_user = elgg_get_logged_in_user_entity();

$user_guid = get_input('user_guid');
if (!is_array($user_guid)) {
	$user_guid = array($user_guid);
}
$group_guid = get_input('group_guid');

if (sizeof($user_guid)) {
	foreach ($user_guid as $u_id) {
		$user = get_entity($u_id);
		$group = get_entity($group_guid);

		if ( $user && $group) {

			if (($group instanceof ElggGroup) && ($group->canEdit())) {
				if (!check_entity_relationship($group->guid, 'invited', $user->guid)) {
					if ($user->isFriend()) {

						// Create relationship
						add_entity_relationship($group->guid, 'invited', $user->guid);

						// Send email
						$url = elgg_normalize_url("pg/groups/invitations/$user->username");
						$result = notify_user($user->getGUID(), $group->owner_guid,
								elgg_echo('groups:invite:subject', array($user->name, $group->name)),
								elgg_echo('groups:invite:body', array($user->name, $logged_in_user->name, $group->name, $url)),
								NULL);
						if ($result) {
							system_message(elgg_echo("groups:userinvited"));
						} else {
							register_error(elgg_echo("groups:usernotinvited"));
						}
					} else {
						register_error(elgg_echo("groups:usernotinvited"));
					}
				} else {
					register_error(elgg_echo("groups:useralreadyinvited"));
				}
			} else {
				register_error(elgg_echo("groups:notowner"));
			}
		}
	}
}

forward(REFERER);