source: inc/core/class.dc.workspace.php @ 13:c7a0f4cc3aab

<?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 User workspace for preferences handler

*/
class dcWorkspace
{
     protected $con;          ///< <b>connection</b> Database connection object
     protected $table;        ///< <b>string</b> Preferences table name
     protected $user_id;      ///< <b>string</b> User ID
     
     protected $global_prefs = array(); ///< <b>array</b> Global prefs array
     protected $local_prefs = array();  ///< <b>array</b> Local prefs array
     protected $prefs = array();        ///< <b>array</b> Associative prefs array
     protected $ws;           ///< <b>string</b> Current workspace
     
     /**
     Object constructor. Retrieves user prefs and puts them in $prefs
     array. Local (user) prefs have a highest priority than global prefs.
     
     @param    name      <b>string</b>       ID for this workspace
     */
     public function __construct(&$core, $user_id, $name, $rs=null)
     {
          if (preg_match('/^[a-zA-Z][a-zA-Z0-9]+$/',$name)) {
               $this->ws = $name;
          } else {
               throw new Exception(sprintf(__('Invalid dcWorkspace: %s'),$name));
          }
          
          $this->con =& $core->con;
          $this->table = $core->prefix.'pref';
          $this->user_id =& $user_id;
          
          $this->getPrefs($rs);
     }
     
     private function getPrefs($rs=null)
     {    
          if ($rs == null) {
               $strReq = 'SELECT user_id, pref_id, pref_value, '.
                         'pref_type, pref_label, pref_ws '.
                         'FROM '.$this->table.' '.
                         "WHERE (user_id = '".$this->con->escape($this->user_id)."' ".
                         'OR user_id IS NULL) '.
                         "AND pref_ws = '".$this->con->escape($this->ws)."' ".
                         'ORDER BY pref_id ASC ';
          
               try {
                    $rs = $this->con->select($strReq);
               } catch (Exception $e) {
                    trigger_error(__('Unable to retrieve prefs:').' '.$this->con->error(), E_USER_ERROR);
               }
          }
          while ($rs->fetch())
          {
               if ($rs->f('pref_ws') != $this->ws){
                    break;
               }
               $id = trim($rs->f('pref_id'));
               $value = $rs->f('pref_value');
               $type = $rs->f('pref_type');
               
               if ($type == 'float' || $type == 'double') {
                    $type = 'float';
               } elseif ($type != 'boolean' && $type != 'integer') {
                    $type = 'string';
               }
               
               settype($value,$type);
               
               $array = $rs->user_id ? 'local' : 'global';
               
               $this->{$array.'_prefs'}[$id] = array(
                    'ws' => $this->ws,
                    'value' => $value,
                    'type' => $type,
                    'label' => (string) $rs->f('pref_label'),
                    'global' => $rs->user_id == ''
               );
          }
          
          $this->prefs = $this->global_prefs;
          
          foreach ($this->local_prefs as $id => $v) {
               $this->prefs[$id] = $v;
          }
          
          return true;
     }
     
     public function prefExists($id,$global=false)
     {
          $array = $global ? 'global' : 'local';
          return isset($this->{$array.'_prefs'}[$id]);
     }
     
     /**
     Returns pref value if exists.
     
     @param    n         <b>string</b>       Pref name
     @return   <b>mixed</b>
     */
     public function get($n)
     {
          if (isset($this->prefs[$n]['value'])) {
               return $this->prefs[$n]['value'];
          }
          
          return null;
     }
     
     /**
     Magic __get method.
     @copydoc ::get
     */
     public function __get($n)
     {
          return $this->get($n);
     }
     
     /**
     Sets a pref in $prefs property. This sets the pref for script
     execution time only and if pref exists.
     
     @param    n         <b>string</b>       Pref name
     @param    v         <b>mixed</b>        Pref value
     */
     public function set($n,$v)
     {
          if (isset($this->prefs[$n])) {
               $this->prefs[$n]['value'] = $v;
          }
     }
     
     /**
     Magic __set method.
     @copydoc ::set
     */
     public function __set($n,$v)
     {
          $this->set($n,$v);
     }
     
     /**
     Creates or updates a pref.
     
     $type could be 'string', 'integer', 'float', 'boolean' or null. If $type is
     null and pref exists, it will keep current pref type.
     
     $value_change allow you to not change pref. Useful if you need to change
     a pref label or type and don't want to change its value.
     
     @param    id             <b>string</b>       Pref ID
     @param    value          <b>mixed</b>        Pref value
     @param    type           <b>string</b>       Pref type
     @param    label          <b>string</b>       Pref label
     @param    value_change   <b>boolean</b>      Change pref value or not
     @param    global         <b>boolean</b>      Pref 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 pref id'),$id));
          }
          
          # We don't want to change pref value
          if (!$value_change)
          {
               if (!$global && $this->prefExists($id,false)) {
                    $value = $this->local_prefs[$id]['value'];
               } elseif ($this->prefExists($id,true)) {
                    $value = $this->global_prefs[$id]['value'];
               }
          }
          
          # Pref type
          if ($type == 'double')
          {
               $type = 'float';
          }
          elseif ($type === null)
          {
               if (!$global && $this->prefExists($id,false)) {
                    $type = $this->local_prefs[$id]['type'];
               } elseif ($this->prefExists($id,true)) {
                    $type = $this->global_prefs[$id]['type'];
               } else {
                    $type = 'string';
               }
          }
          elseif ($type != 'boolean' && $type != 'integer' && $type != 'float')
          {
               $type = 'string';
          }
          
          # We don't change label
          if ($label == null)
          {
               if (!$global && $this->prefExists($id,false)) {
                    $label = $this->local_prefs[$id]['label'];
               } elseif ($this->prefExists($id,true)) {
                    $label = $this->global_prefs[$id]['label'];
               }
          }
          
          settype($value,$type);
          
          $cur = $this->con->openCursor($this->table);
          $cur->pref_value = ($type == 'boolean') ? (string) (integer) $value : (string) $value;
          $cur->pref_type = $type;
          $cur->pref_label = $label;
          
          #If we are local, compare to global value
          if (!$global && $this->prefExists($id,true))
          {
               $g = $this->global_prefs[$id];
               $same_pref = $g['ws'] == $this->ws && $g['value'] == $value
               && $g['type'] == $type && $g['label'] == $label;
               
               # Drop pref if same value as global
               if ($same_pref && $this->prefExists($id,false)) {
                    $this->drop($id);
               } elseif ($same_pref) {
                    return;
               }
          }
          
          if ($this->prefExists($id,$global) && $this->ws == $this->prefs[$id]['ws'])
          {
               if ($global) {
                    $where = 'WHERE user_id IS NULL ';
               } else {
                    $where = "WHERE user_id = '".$this->con->escape($this->user_id)."' ";
               }
               
               $cur->update($where."AND pref_id = '".$this->con->escape($id)."' AND pref_ws = '".$this->con->escape($this->ws)."' ");
          }
          else
          {
               $cur->pref_id = $id;
               $cur->user_id = $global ? null : $this->user_id;
               $cur->pref_ws = $this->ws;
               
               $cur->insert();
          }
     }
     
     /**
     Removes an existing pref. Workspace 
     
     @param    id        <b>string</b>       Pref ID
     */
     public function drop($id)
     {
          if (!$this->ws) {
               throw new Exception(__('No workspace specified'));
          }
          
          $strReq = 'DELETE FROM '.$this->table.' ';
          
          if ($this->user_id === null) {
               $strReq .= 'WHERE user_id IS NULL ';
               $global = true;
          } else {
               $strReq .= "WHERE user_id = '".$this->con->escape($this->user_id)."' ";
               $global = false;
          }
          
          $strReq .= "AND pref_id = '".$this->con->escape($id)."' ";
          $strReq .= "AND pref_ws = '".$this->con->escape($this->ws)."' ";
          
          $this->con->execute($strReq);
          
          if ($this->prefExists($id,$global)) {
               $array = $global ? 'global' : 'local';
               unset($this->{$array.'_prefs'}[$id]);
          }
     }
     
     /**
     Returns $prefs property content.
     
     @return   <b>array</b>
     */
     public function dumpPrefs()
     {
          return $this->prefs;
     }
     
     /**
     Returns $local_prefs property content.
     
     @return   <b>array</b>
     */
     public function dumpLocalPrefs()
     {
          return $this->local_prefs;
     }

     /**
     Returns $global_prefs property content.
     
     @return   <b>array</b>
     */
     public function dumpGlobalPrefs()
     {
          return $this->global_prefs;
     }

}
?>