source: inc/core/class.dc.namespace.php @ 934:1ab99955f080

<?php
# -- BEGIN LICENSE BLOCK ---------------------------------------
#
# This file is part of Dotclear 2.
#
# Copyright (c) 2003-2011 Olivier Meunier & Association Dotclear
# Licensed under the GPL version 2.0 license.
# See LICENSE file or
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK -----------------------------------------
if (!defined('DC_RC_PATH')) { return; }

/**
@ingroup DC_CORE
@brief Blog namespace for settings handler

*/
class dcNamespace
{
     protected $con;          ///< <b>connection</b> Database connection object
     protected $table;        ///< <b>string</b> Settings table name
     protected $blog_id;      ///< <b>string</b> Blog ID
     
     protected $global_settings = array();   ///< <b>array</b> Global settings array
     protected $local_settings = array();    ///< <b>array</b> Local settings array
     protected $settings = array();          ///< <b>array</b> Associative settings array
     protected $ns;           ///< <b>string</b> Current namespace
     
     /**
     Object constructor. Retrieves blog settings and puts them in $settings
     array. Local (blog) settings have a highest priority than global settings.
     
     @param    name      <b>string</b>       ID for this namespace
     */
     public function __construct(&$core, $blog_id, $name, $rs=null)
     {
          if (preg_match('/^[a-zA-Z][a-zA-Z0-9]+$/',$name)) {
               $this->ns = $name;
          } else {
               throw new Exception(sprintf(__('Invalid setting dcNamespace: %s'),$name));
          }
          
          $this->con =& $core->con;
          $this->table = $core->prefix.'setting';
          $this->blog_id =& $blog_id;
          
          $this->getSettings($rs);
     }
     
     private function getSettings($rs=null)
     {    
          if ($rs == null) {
               $strReq = 'SELECT blog_id, setting_id, setting_value, '.
                         'setting_type, setting_label, setting_ns '.
                         'FROM '.$this->table.' '.
                         "WHERE (blog_id = '".$this->con->escape($this->blog_id)."' ".
                         'OR blog_id IS NULL) '.
                         "AND setting_ns = '".$this->con->escape($this->ns)."' ".
                         'ORDER BY setting_id DESC ';
          
               try {
                    $rs = $this->con->select($strReq);
               } catch (Exception $e) {
                    trigger_error(__('Unable to retrieve settings:').' '.$this->con->error(), E_USER_ERROR);
               }
          }
          while ($rs->fetch())
          {
               if ($rs->f('setting_ns') != $this->ns){
                    break;
               }
               $id = trim($rs->f('setting_id'));
               $value = $rs->f('setting_value');
               $type = $rs->f('setting_type');
               
               if ($type == 'float' || $type == 'double') {
                    $type = 'float';
               } elseif ($type != 'boolean' && $type != 'integer') {
                    $type = 'string';
               }
               
               settype($value,$type);
               
               $array = $rs->blog_id ? 'local' : 'global';
               
               $this->{$array.'_settings'}[$id] = array(
                    'ns' => $this->ns,
                    'value' => $value,
                    'type' => $type,
                    'label' => (string) $rs->f('setting_label'),
                    'global' => $rs->blog_id == ''
               );
          }
          
          $this->settings = $this->global_settings;
          
          foreach ($this->local_settings as $id => $v) {
               $this->settings[$id] = $v;
          }
          
          return true;
     }
     
     private function settingExists($id,$global=false)
     {
          $array = $global ? 'global' : 'local';
          return isset($this->{$array.'_settings'}[$id]);
     }
     
     /**
     Returns setting value if exists.
     
     @param    n         <b>string</b>       Setting name
     @return   <b>mixed</b>
     */
     public function get($n)
     {
          if (isset($this->settings[$n]['value'])) {
               return $this->settings[$n]['value'];
          }
          
          return null;
     }
     
     /**
     Magic __get method.
     @copydoc ::get
     */
     public function __get($n)
     {
          return $this->get($n);
     }
     
     /**
     Sets a setting in $settings property. This sets the setting for script
     execution time only and if setting exists.
     
     @param    n         <b>string</b>       Setting name
     @param    v         <b>mixed</b>        Setting value
     */
     public function set($n,$v)
     {
          if (isset($this->settings[$n])) {
               $this->settings[$n]['value'] = $v;
          }
     }
     
     /**
     Magic __set method.
     @copydoc ::set
     */
     public function __set($n,$v)
     {
          $this->set($n,$v);
     }
     
     /**
     Creates or updates a setting.
     
     $type could be 'string', 'integer', 'float', 'boolean' or null. If $type is
     null and setting exists, it will keep current setting type.
     
     $value_change allow you to not change setting. Useful if you need to change
     a setting label or type and don't want to change its value.
     
     @param    id             <b>string</b>       Setting ID
     @param    value          <b>mixed</b>        Setting value
     @param    type           <b>string</b>       Setting type
     @param    label          <b>string</b>       Setting label
     @param    value_change   <b>boolean</b>      Change setting value or not
     @param    global         <b>boolean</b>      Setting is global
     */
     public function put($id,$value,$type=null,$label=null,$value_change=true,$global=false)
     {
          if (!preg_match('/^[a-zA-Z][a-zA-Z0-9_]+$/',$id)) {
               throw new Exception(sprintf(__('%s is not a valid setting id'),$id));
          }
          
          # We don't want to change setting value
          if (!$value_change)
          {
               if (!$global && $this->settingExists($id,false)) {
                    $value = $this->local_settings[$id]['value'];
               } elseif ($this->settingExists($id,true)) {
                    $value = $this->global_settings[$id]['value'];
               }
          }
          
          # Setting type
          if ($type == 'double')
          {
               $type = 'float';
          }
          elseif ($type === null)
          {
               if (!$global && $this->settingExists($id,false)) {
                    $type = $this->local_settings[$id]['type'];
               } elseif ($this->settingExists($id,true)) {
                    $type = $this->global_settings[$id]['type'];
               } else {
                    $type = 'string';
               }
          }
          elseif ($type != 'boolean' && $type != 'integer' && $type != 'float')
          {
               $type = 'string';
          }
          
          # We don't change label
          if ($label == null)
          {
               if (!$global && $this->settingExists($id,false)) {
                    $label = $this->local_settings[$id]['label'];
               } elseif ($this->settingExists($id,true)) {
                    $label = $this->global_settings[$id]['label'];
               }
          }
          
          settype($value,$type);
          
          $cur = $this->con->openCursor($this->table);
          $cur->setting_value = ($type == 'boolean') ? (string) (integer) $value : (string) $value;
          $cur->setting_type = $type;
          $cur->setting_label = $label;
          
          #If we are local, compare to global value
          if (!$global && $this->settingExists($id,true))
          {
               $g = $this->global_settings[$id];
               $same_setting = $g['ns'] == $this->ns && $g['value'] == $value
               && $g['type'] == $type && $g['label'] == $label;
               
               # Drop setting if same value as global
               if ($same_setting && $this->settingExists($id,false)) {
                    $this->drop($id);
               } elseif ($same_setting) {
                    return;
               }
          }
          
          if ($this->settingExists($id,$global) && $this->ns == $this->settings[$id]['ns'])
          {
               if ($global) {
                    $where = 'WHERE blog_id IS NULL ';
               } else {
                    $where = "WHERE blog_id = '".$this->con->escape($this->blog_id)."' ";
               }
               
               $cur->update($where."AND setting_id = '".$this->con->escape($id)."' AND setting_ns = '".$this->con->escape($this->ns)."' ");
          }
          else
          {
               $cur->setting_id = $id;
               $cur->blog_id = $global ? null : $this->blog_id;
               $cur->setting_ns = $this->ns;
               
               $cur->insert();
          }
     }

     /**
     Rename an existing setting in a Namespace

     @param    $oldId    <b>string</b>  Current setting name
     @param    $newId    <b>string</b>  New setting name
     @return   <b>boolean</b>
     */
     public function rename($oldId,$newId)
     {
          if (!$this->ns) {
               throw new Exception(__('No namespace specified'));
          }
          
          if (!array_key_exists($oldId,$this->settings) || array_key_exists($newId,$this->settings)) {
               return false;
          }

          // Rename the setting in the settings array
          $this->settings[$newId] = $this->settings[$oldId];
          unset($this->settings[$oldId]);

          // Rename the setting in the database
          $strReq = 'UPDATE '.$this->table.
               " SET setting_id = '".$this->con->escape($newId)."' ".
               " WHERE setting_ns = '".$this->con->escape($this->ns)."' ".
               " AND setting_id = '".$this->con->escape($oldId)."' ";
          $this->con->execute($strReq);
          return true;
     }

     /**
     Removes an existing setting in a Namespace 
     
     @param    id        <b>string</b>       Setting ID
     */
     public function drop($id)
     {
          if (!$this->ns) {
               throw new Exception(__('No namespace specified'));
          }
          
          $strReq = 'DELETE FROM '.$this->table.' ';
          
          if ($this->blog_id === null) {
               $strReq .= 'WHERE blog_id IS NULL ';
          } else {
               $strReq .= "WHERE blog_id = '".$this->con->escape($this->blog_id)."' ";
          }
          
          $strReq .= "AND setting_id = '".$this->con->escape($id)."' ";
          $strReq .= "AND setting_ns = '".$this->con->escape($this->ns)."' ";
          
          $this->con->execute($strReq);
     }
     
     /**
     Removes all existing settings in a Namespace 
     
     @param    force_global   <b>boolean</b> Force global pref drop
     */
     public function dropAll($force_global=false)
     {
          if (!$this->ns) {
               throw new Exception(__('No namespace specified'));
          }
          
          $strReq = 'DELETE FROM '.$this->table.' ';
          
          if (($force_global) || ($this->blog_id === null)) {
               $strReq .= 'WHERE blog_id IS NULL ';
               $global = true;
          } else {
               $strReq .= "WHERE blog_id = '".$this->con->escape($this->blog_id)."' ";
               $global = false;
          }
          
          $strReq .= "AND setting_ns = '".$this->con->escape($this->ns)."' ";
          
          $this->con->execute($strReq);
          
          $array = $global ? 'global' : 'local';
          unset($this->{$array.'_settings'});
          $this->{$array.'_settings'} = array();
          
          $array = $global ? 'local' : 'global';
          $this->settings = $this->{$array.'_settings'};
     }
     
     /**
     Returns $settings property content.
     
     @return   <b>array</b>
     */
     public function dumpSettings()
     {
          return $this->settings;
     }
     
     /**
     Returns $global_settings property content.
     
     @return   <b>array</b>
     */
     public function dumpGlobalSettings()
     {
          return $this->global_settings;
     }

}
?>