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<?php
/**
* @package Joomla.Administrator
* @subpackage com_users
*
* @copyright Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
/**
* User view level model.
*
* @package Joomla.Administrator
* @subpackage com_users
* @since 1.6
*/
class UsersModelLevel extends JModelAdmin
{
/**
* @var array A list of the access levels in use.
* @since 1.6
*/
protected $levelsInUse = null;
/**
* Method to test whether a record can be deleted.
*
* @param object $record A record object.
*
* @return boolean True if allowed to delete the record. Defaults to the permission set in the component.
* @since 1.6
*/
protected function canDelete($record)
{
// Check if the access level is being used by any content.
if ($this->levelsInUse === null)
{
// Populate the list once.
$this->levelsInUse = array();
$db = $this->getDbo();
$query = $db->getQuery(true)
->select('DISTINCT access');
// from is added dynamically
// Get all the tables and the prefix
$tables = $db->getTableList();
//$fields = $db->getTableFields($tables);
$prefix = $db->getPrefix();
foreach ($tables as $table)
{
// Get all of the columns in the table
$fields = $db->getTableColumns($table);
// We are looking for the access field. If custom tables are using something other
// than the 'access' field they are on their own unfortunately.
// Also make sure the table prefix matches the live db prefix (eg, it is not a "bak_" table)
if ((strpos($table, $prefix) === 0) && (isset($fields['access'])))
{
// Lookup the distinct values of the field.
$query->clear('from')
->from($db->quoteName($table));
$db->setQuery($query);
try
{
$values = $db->loadColumn();
}
catch (RuntimeException $e)
{
$this->setError($e->getMessage());
return false;
}
$this->levelsInUse = array_merge($this->levelsInUse, $values);
// TODO Could assemble an array of the tables used by each view level list those,
// giving the user a clue in the error where to look.
}
}
// Get uniques.
$this->levelsInUse = array_unique($this->levelsInUse);
// Ok, after all that we are ready to check the record :)
}
if (in_array($record->id, $this->levelsInUse))
{
$this->setError(JText::sprintf('COM_USERS_ERROR_VIEW_LEVEL_IN_USE', $record->id, $record->title));
return false;
}
return parent::canDelete($record);
}
/**
* Returns a reference to the a Table object, always creating it.
*
* @param type The table type to instantiate
* @param string A prefix for the table class name. Optional.
* @param array Configuration array for model. Optional.
* @return JTable A database object
* @since 1.6
*/
public function getTable($type = 'Viewlevel', $prefix = 'JTable', $config = array())
{
$return = JTable::getInstance($type, $prefix, $config);
return $return;
}
/**
* Method to get a single record.
*
* @param integer The id of the primary key.
* @return mixed Object on success, false on failure.
* @since 1.6
*/
public function getItem($pk = null)
{
$result = parent::getItem($pk);
// Convert the params field to an array.
$result->rules = json_decode($result->rules);
return $result;
}
/**
* Method to get the record form.
*
* @param array $data An optional array of data for the form to interogate.
* @param boolean $loadData True if the form is to load its own data (default case), false if not.
* @return JForm A JForm object on success, false on failure
* @since 1.6
*/
public function getForm($data = array(), $loadData = true)
{
// Get the form.
$form = $this->loadForm('com_users.level', 'level', array('control' => 'jform', 'load_data' => $loadData));
if (empty($form))
{
return false;
}
return $form;
}
/**
* Method to get the data that should be injected in the form.
*
* @return mixed The data for the form.
* @since 1.6
*/
protected function loadFormData()
{
// Check the session for previously entered form data.
$data = JFactory::getApplication()->getUserState('com_users.edit.level.data', array());
if (empty($data))
{
$data = $this->getItem();
}
$this->preprocessData('com_users.level', $data);
return $data;
}
/**
* Override preprocessForm to load the user plugin group instead of content.
*
* @param object A form object.
* @param mixed The data expected for the form.
* @throws Exception if there is an error in the form event.
* @since 1.6
*/
protected function preprocessForm(JForm $form, $data, $groups = '')
{
parent::preprocessForm($form, $data, 'user');
}
/**
* Method to save the form data.
*
* @param array The form data.
* @return boolean True on success.
* @since 1.6
*/
public function save($data)
{
if (!isset($data['rules']))
{
$data['rules'] = array();
}
return parent::save($data);
}
}