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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 users.
*
* Note: by design, this class does not do any permission checking.
*/
class user_Core {
static function get_login_form($url) {
$form = new Forge($url, "", "post", array("id" => "g-login-form"));
$form->set_attr('class', "g-narrow");
$group = $form->group("login")->label(t("Login"));
$group->input("name")->label(t("Username"))->id("g-username")->class(null);
$group->password("password")->label(t("Password"))->id("g-password")->class(null);
$group->inputs["name"]->error_messages("invalid_login", t("Invalid name or password"));
$group->submit("")->value(t("Login"));
return $form;
}
/**
* Return the active user. If there's no active user, return the guest user.
*
* @return User_Model
*/
static function active() {
// @todo (maybe) cache this object so we're not always doing session lookups.
$user = Session::instance()->get("user", null);
if (!isset($user)) {
// Don't do this as a fallback in the Session::get() call because it can trigger unnecessary
// work.
$user = self::guest();
}
return $user;
}
/**
* Change the active user.
*
* @return User_Model
*/
static function set_active($user) {
$session = Session::instance();
$session->set("user", $user);
$session->delete("group_ids");
self::load_user();
}
/**
* Return the array of group ids this user belongs to
*
* @return array
*/
static function group_ids() {
return Session::instance()->get("group_ids", array(1));
}
/**
* Make sure that we have a session and group_ids cached in the session. This is one
* of the first calls to reference the user so call the Identity::instance to load the
* driver classes.
*/
static function load_user() {
$session = Session::instance();
if (!($user = $session->get("user"))) {
$session->set("user", $user = self::guest());
}
// The installer cannot set a user into the session, so it just sets an id which we should
// upconvert into a user.
// @todo what is user id===2
if ($user === 2) {
$user = model_cache::get("user", 2);
self::login($user);
$session->set("user", $user);
}
if (!$session->get("group_ids")) {
$ids = array();
foreach ($user->groups as $group) {
$ids[] = $group->id;
}
$session->set("group_ids", $ids);
}
}
/**
* Log in as a given user.
* @param object $user the user object.
*/
static function login($user) {
// @todo make this an interface call
$user->login_count += 1;
$user->last_login = time();
$user->save();
self::set_active($user);
module::event("user_login", $user);
}
/**
* Log out the active user and destroy the session.
* @param object $user the user object.
*/
static function logout() {
$user = self::active();
if (!$user->guest) {
try {
Session::instance()->destroy();
} catch (Exception $e) {
Kohana::log("error", $e);
}
module::event("user_logout", $user);
}
}
/**
* @see Identity_Core::is_writable.
*/
static function is_writable() {
return Identity::instance()->is_writable();
}
/**
* @see Identity_Driver::guest.
*/
static function guest() {
return Identity::instance()->guest();
}
/**
* @see Identity_Driver::create_user.
*/
static function create($name, $full_name, $password) {
return Identity::instance()->create_user($name, $full_name, $password);
}
/**
* @see Identity_Driver::is_correct_password.
*/
static function is_correct_password($user, $password) {
return Identity::instance()->is_correct_password($user, $password);
}
/**
* @see Identity_Driver::hash_password.
*/
static function hash_password($password) {
return Identity::instance()->hash_password($password);
}
/**
* Look up a user by id.
* @param integer $id the user id
* @return User_Definition the user object, or null if the id was invalid.
*/
static function lookup($id) {
return Identity::instance()->lookup_user_by_field("id", $id);
}
/**
* Look up a user by name.
* @param integer $name the user name
* @return User_Definition the user object, or null if the name was invalid.
*/
static function lookup_by_name($name) {
return Identity::instance()->lookup_user_by_field("name", $name);
}
/**
* Look up a user by hash.
* @param string $name the user name
* @return User_Definition the user object, or null if the name was invalid.
*/
static function lookup_by_hash($hash) {
return Identity::instance()->lookup_user_by_field("hash", $hash);
}
/**
* @see Identity_Driver::get_user_list.
*/
static function get_user_list($filter=array()) {
return Identity::instance()->get_user_list($filter);
}
/**
* @see Identity_Driver::get_edit_rules.
*/
static function get_edit_rules() {
return Identity::instance()->get_edit_rules("user");
}
private static function _lookup_user_by_field($field_name, $value) {
try {
$user = model_cache::get("user", $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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