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   1  <?php
   2  /**
   3   * @copyright    Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
   4   * @license        GNU General Public License version 2 or later; see LICENSE.txt
   5   */
   6  
   7  defined('JPATH_BASE') or die;
   8  
   9  JFormHelper::loadFieldClass('list');
  10  
  11  /**
  12   * Form Field class for the Joomla Framework.
  13   *
  14   * @package        Joomla.Administrator
  15   * @subpackage    com_categories
  16   * @since        1.6
  17   */
  18  class JFormFieldCategoryParent extends JFormFieldList
  19  {
  20      /**
  21       * The form field type.
  22       *
  23       * @var        string
  24       * @since    1.6
  25       */
  26      protected $type = 'CategoryParent';
  27  
  28      /**
  29       * Method to get the field options.
  30       *
  31       * @return    array    The field option objects.
  32       * @since    1.6
  33       */
  34  	protected function getOptions()
  35      {
  36          // Initialise variables.
  37          $options = array();
  38          $name = (string) $this->element['name'];
  39  
  40          // Let's get the id for the current item, either category or content item.
  41          $jinput = JFactory::getApplication()->input;
  42          // For categories the old category is the category id 0 for new category.
  43          if ($this->element['parent'])
  44          {
  45              $oldCat = $jinput->get('id',0);
  46              $oldParent = $this->form->getValue($name);
  47          }
  48          else
  49          // For items the old category is the category they are in when opened or 0 if new.
  50          {
  51              $thisItem = $jinput->get('id',0);
  52              $oldCat = $this->form->getValue($name);
  53          }
  54  
  55          $db        = JFactory::getDbo();
  56          $query    = $db->getQuery(true);
  57  
  58          $query->select('a.id AS value, a.title AS text, a.level');
  59          $query->from('#__categories AS a');
  60          $query->join('LEFT', $db->quoteName('#__categories').' AS b ON a.lft > b.lft AND a.rgt < b.rgt');
  61  
  62          // Filter by the type
  63          if ($extension = $this->form->getValue('extension')) {
  64              $query->where('(a.extension = '.$db->quote($extension).' OR a.parent_id = 0)');
  65          }
  66          if ($this->element['parent'])
  67          {
  68          // Prevent parenting to children of this item.
  69              if ($id = $this->form->getValue('id')) {
  70                  $query->join('LEFT', $db->quoteName('#__categories').' AS p ON p.id = '.(int) $id);
  71                  $query->where('NOT(a.lft >= p.lft AND a.rgt <= p.rgt)');
  72  
  73                  $rowQuery    = $db->getQuery(true);
  74                  $rowQuery->select('a.id AS value, a.title AS text, a.level, a.parent_id');
  75                  $rowQuery->from('#__categories AS a');
  76                  $rowQuery->where('a.id = ' . (int) $id);
  77                  $db->setQuery($rowQuery);
  78                  $row = $db->loadObject();
  79              }
  80          }
  81          $query->where('a.published IN (0,1)');
  82          $query->group('a.id, a.title, a.level, a.lft, a.rgt, a.extension, a.parent_id');
  83          $query->order('a.lft ASC');
  84  
  85          // Get the options.
  86          $db->setQuery($query);
  87  
  88          $options = $db->loadObjectList();
  89  
  90          // Check for a database error.
  91          if ($db->getErrorNum()) {
  92              JError::raiseWarning(500, $db->getErrorMsg());
  93          }
  94  
  95          // Pad the option text with spaces using depth level as a multiplier.
  96          for ($i = 0, $n = count($options); $i < $n; $i++)
  97          {
  98              // Translate ROOT
  99              if ($options[$i]->level == 0) {
 100                  $options[$i]->text = JText::_('JGLOBAL_ROOT_PARENT');
 101              }
 102  
 103              $options[$i]->text = str_repeat('- ', $options[$i]->level).$options[$i]->text;
 104          }
 105  
 106          // Initialise variables.
 107  
 108                  // Get the current user object.
 109                  $user = JFactory::getUser();
 110  
 111                  // For new items we want a list of categories you are allowed to create in.
 112                  if ($oldCat == 0)
 113                  {
 114                      foreach ($options as $i => $option)
 115                      {
 116                          // To take save or create in a category you need to have create rights for that category
 117                          // unless the item is already in that category.
 118                          // Unset the option if the user isn't authorised for it. In this field assets are always categories.
 119                          if ($user->authorise('core.create', $extension . '.category.' . $option->value) != true )
 120                          {
 121                              unset($options[$i]);
 122                          }
 123                      }
 124                  }
 125                  // If you have an existing category id things are more complex.
 126                  else
 127                  {
 128                      //$categoryOld = $this->form->getValue($name);
 129                      foreach ($options as $i => $option)
 130                      {
 131                          // If you are only allowed to edit in this category but not edit.state, you should not get any
 132                          // option to change the category parent for a category or the category for a content item,
 133                          // but you should be able to save in that category.
 134                          if ($user->authorise('core.edit.state', $extension . '.category.' . $oldCat) != true)
 135                          {
 136                              if ($option->value != $oldCat)
 137                              {echo 'y';
 138                                  unset($options[$i]);
 139                              }
 140                          }
 141                          // However, if you can edit.state you can also move this to another category for which you have
 142                          // create permission and you should also still be able to save in the current category.
 143                          elseif
 144                              (($user->authorise('core.create', $extension . '.category.' . $option->value) != true)
 145                              && $option->value != $oldCat)
 146                          {echo 'x';
 147                              unset($options[$i]);
 148                          }
 149                      }
 150                  }
 151  
 152  
 153          if (isset($row) && !isset($options[0])) {
 154              if ($row->parent_id == '1') {
 155                  $parent = new stdClass();
 156                  $parent->text = JText::_('JGLOBAL_ROOT_PARENT');
 157                  array_unshift($options, $parent);
 158              }
 159          }
 160  
 161          // Merge any additional options in the XML definition.
 162          $options = array_merge(parent::getOptions(), $options);
 163  
 164          return $options;
 165      }
 166  }