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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2009 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* This is the API for handling groups.
*
* Note: by design, this class does not do any permission checking.
*/
class group_Core {
/**
* Create a new group.
*
* @param string $name
* @return Group_Definition the group object
*/
static function create($name) {
$group = ORM::factory("group")->where("name", "=", $name)->find();
if ($group->loaded()) {
throw new Exception("@todo GROUP_ALREADY_EXISTS $name");
}
$group->name = $name;
$group->save();
return $group;
}
/**
* The group of all possible visitors. This includes the guest user.
*
* @return Group_Definition the group object
*/
static function everybody() {
return model_cache::get("group", 1);
}
/**
* The group of all logged-in visitors. This does not include guest users.
*
* @return Group_Definition the group object
*/
static function registered_users() {
return model_cache::get("group", 2);
}
/**
* Look up a group by id.
* @param integer $id the user id
* @return Group_Definition the group object, or null if the id was invalid.
*/
static function lookup($id) {
return self::_lookup_by_field("id", $id);
}
/**
* Look up a group by name.
* @param integer $id the group name
* @return Group_Definition the group object, or null if the name was invalid.
*/
static function lookup_by_name($name) {
return self::_lookup_by_field("name", $name);
}
/**
* Search the groups by the field and value.
* @param string $field_name column to look up the user by
* @param string $value value to match
* @return Group_Definition the group object, or null if the name was invalid.
*/
private static function _lookup_by_field($field_name, $value) {
try {
$user = model_cache::get("group", $value, $field_name);
if ($user->loaded()) {
return $user;
}
} catch (Exception $e) {
if (strpos($e->getMessage(), "MISSING_MODEL") === false) {
throw $e;
}
}
return null;
}
}
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