<?php
/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
# ***** BEGIN LICENSE BLOCK *****
# This file is part of Plume Framework, a simple PHP Application Framework.
# Copyright (C) 2001-2007 Loic d'Anterroches and contributors.
#
# Plume Framework is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Plume Framework 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
# ***** END LICENSE BLOCK ***** */

class Pluf_Permission extends Pluf_Model
{
    public $_model = 'Pluf_Permission';

    function init()
    {
        $this->_a['verbose'] = __('permission');
        $this->_a['table'] = 'permissions';
        $this->_a['model'] = 'Pluf_Permission';
        $this->_a['cols'] = array(
                             // It is mandatory to have an "id" column.
                            'id' =>
                            array(
                                  'type' => 'Pluf_DB_Field_Sequence',
                                  //It is automatically added.
                                  'blank' => true, 
                                  ),
                            'name' =>
                            array(
                                  'type' => 'Pluf_DB_Field_Varchar',
                                  'blank' => false,
                                  'size' => 50,
                                  'verbose' => __('name'),
                                  ),
                            'code_name' => 
                            array(
                                  'type' => 'Pluf_DB_Field_Varchar',
                                  'blank' => false,
                                  'size' => 100,
                                  'verbose' => __('code name'),
                                  'help_text' => __('The code name must be unique for each application. Standard permissions to manage a model in the interface are "Model_Name-create", "Model_Name-update", "Model_Name-list" and "Model_Name-delete".'),
                                  ),
                            'description' => 
                            array(
                                  'type' => 'Pluf_DB_Field_Varchar',
                                  'blank' => false,
                                  'size' => 250,
                                  'verbose' => __('description'),
                                  ),
                            'application' => 
                            array(
                                  'type' => 'Pluf_DB_Field_Varchar',
                                  'size' => 150,
                                  'blank' => false,
                                  'verbose' => __('application'),
                                  'help_text' => __('The application using this permission, for example "YourApp", "CMS" or "SView".'),
                                   ),
                            );
        $this->_a['idx'] = array(                           
                            'code_name_idx' =>
                            array(
                                  'type' => 'normal',
                                  'col' => 'code_name',
                                  ),
                            'application_idx' =>
                            array(
                                  'type' => 'normal',
                                  'col' => 'application',
                                  ),
                            );
        $hay = array(strtolower(Pluf::f('pluf_custom_group', 'Pluf_Group')), strtolower($this->_a['model']));
        sort($hay);
        $t_asso = $this->_con->pfx.$hay[0].'_'.$hay[1].'_assoc';
        $t_perm = $this->_con->pfx.'permissions';
        $this->_a['views'] = array(
                              'join_group' => 
                              array(
                                    'join' => 'LEFT JOIN '.$t_asso
                                    .' ON '.$t_perm.'.id=pluf_permission_id',
                                    ),
                              );
    }

    function __toString()
    {
        return $this->name.' ('.$this->application.'.'.$this->code_name.')';
    }

    /**
     * Get the matching permission object from the permission string.
     *
     * @param string Permission string, for example 'Pluf_User.create'.
     * @return false|Pluf_Permission The matching permission or false.
     */
    public static function getFromString($perm)
    {
        list($app, $code) = explode('.', trim($perm));
        $sql = new Pluf_SQL('code_name=%s AND application=%s',
                            array($code, $app));
        $perms = Pluf::factory('Pluf_Permission')->getList(array('filter'=>$sql->gen()));
        if ($perms->count() != 1) {
            return false;
        }
        return $perms[0];
    }
}