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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.
*/
/**
* Provides a driver-based interface for managing users and groups.
*/
class Identity_Core {
protected static $instances = array();
// Configuration
protected $config;
// Driver object
protected $driver;
/**
* Returns a singleton instance of Identity.
*
* @param string configuration
* @return Identity_Core
*/
static function & instance($config="default") {
if (!isset(Identity::$instances[$config])) {
// Create a new instance
Identity::$instances[$config] = new Identity($config);
}
return Identity::$instances[$config];
}
/**
* Loads the configured driver and validates it.
*
* @param array|string custom configuration or config group name
* @return void
*/
public function __construct($config="default") {
if (is_string($config)) {
$name = $config;
// Test the config group name
if (($config = Kohana::config("identity.".$config)) === NULL) {
throw new Exception("@todo NO USER LIBRARY CONFIGURATION FOR: $name");
}
if (is_array($config)) {
// Append the default configuration options
$config += Kohana::config("identity.default");
} else {
// Load the default group
$config = Kohana::config("identity.default");
}
// Cache the config in the object
$this->config = $config;
// Set driver name
$driver = "Identity_".ucfirst($this->config["driver"])."_Driver";
// Load the driver
if ( ! Kohana::auto_load($driver)) {
throw new Kohana_Exception("core.driver_not_found", $this->config["driver"],
get_class($this));
}
// Initialize the driver
$this->driver = new $driver($this->config["params"]);
// Validate the driver
if ( !($this->driver instanceof Identity_Driver))
throw new Kohana_Exception("core.driver_implements", $this->config["driver"],
get_class($this), "Identity_Driver");
Kohana::log("debug", "Identity Library initialized");
}
}
/**
* Determine if a feature is supported by the driver.
*
* @param string $feature the name of the feature to check
* @return boolean true if supported
*/
public function is_writable() {
return !empty($this->config["allow_updates"]);
}
/**
* Return the guest user.
*
* @todo consider caching
*
* @return Identity_Model
*/
public function guest() {
return $this->driver->guest();
}
/**
* Create a new user.
*
* @param string $name
* @param string $full_name
* @param string $password
* @return Identity_Model
*/
public function create_user($name, $full_name, $password) {
return $this->driver->create_user($name, $full_name, $password);
}
/**
* Is the password provided correct?
*
* @param user Identity Model
* @param string $password a plaintext password
* @return boolean true if the password is correct
*/
public function is_correct_password($user, $password) {
return $this->driver->is_correct_password($user, $password);
}
/**
* Create the hashed passwords.
* @param string $password a plaintext password
* @return string hashed password
*/
public function hash_password($password) {
return $this->driver->hash_password($password);
}
/**
* Look up a user by field value.
* @param string search field
* @param string search value
* @return Identity_Model the user object, or null if the name was invalid.
*/
public function lookup_user_by_field($field_name, $value) {
return $this->driver->lookup_user_by_field($field_name, $value);
}
/**
* Create a new group.
*
* @param string $name
* @return Group_Model
*/
public function create_group($name) {
return $this->driver->create_group($name);
}
/**
* The group of all possible visitors. This includes the guest user.
*
* @return Group_Model
*/
public function everybody() {
return $this->driver->everybody();
}
/**
* The group of all logged-in visitors. This does not include guest users.
*
* @return Group_Model
*/
public function registered_users() {
return $this->driver->everybody();
}
/**
* Look up a group by name.
* @param integer $id the group name
* @return Group_Model the group object, or null if the name was invalid.
*/
public function lookup_group_by_field($field_name, $value) {
return $this->driver->lookup_group_by_field($field_name, $value);
}
/**
* List the users
* @param mixed options to apply to the selection of the user
* @return array the group list.
*/
public function get_user_list($filter=array()) {
return $this->driver->get_user_list($filter);
}
/**
* List the groups
* @param mixed options to apply to the selection of the user
* @return array the group list.
*/
public function get_group_list($filter=array()) {
return $this->driver->get_group_list($filter);
}
/**
* Return the edit rules associated with an group.
*
* @param string $object_type to return rules for ("user"|"group")
* @return stdClass containing the rules
*/
public function get_edit_rules($object_type) {
return $this->driver->get_edit_rules($object_type);
}
} // End Identity
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