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<?php
/**
* @package Joomla.Legacy
* @subpackage Model
*
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Base class for a Joomla Model
*
* Acts as a Factory class for application specific objects and
* provides many supporting API functions.
*
* @package Joomla.Legacy
* @subpackage Model
* @since 12.2
*/
abstract class JModelLegacy extends JObject
{
/**
* Indicates if the internal state has been set
*
* @var boolean
* @since 12.2
*/
protected $__state_set = null;
/**
* Database Connector
*
* @var object
* @since 12.2
*/
protected $_db;
/**
* The model (base) name
*
* @var string
* @since 12.2
*/
protected $name;
/**
* The URL option for the component.
*
* @var string
* @since 12.2
*/
protected $option = null;
/**
* A state object
*
* @var string
* @since 12.2
*/
protected $state;
/**
* The event to trigger when cleaning cache.
*
* @var string
* @since 12.2
*/
protected $event_clean_cache = null;
/**
* Add a directory where JModelLegacy should search for models. You may
* either pass a string or an array of directories.
*
* @param mixed $path A path or array[sting] of paths to search.
* @param string $prefix A prefix for models.
*
* @return array An array with directory elements. If prefix is equal to '', all directories are returned.
*
* @since 12.2
*/
public static function addIncludePath($path = '', $prefix = '')
{
static $paths;
if (!isset($paths))
{
$paths = array();
}
if (!isset($paths[$prefix]))
{
$paths[$prefix] = array();
}
if (!isset($paths['']))
{
$paths[''] = array();
}
if (!empty($path))
{
jimport('joomla.filesystem.path');
if (!in_array($path, $paths[$prefix]))
{
array_unshift($paths[$prefix], JPath::clean($path));
}
if (!in_array($path, $paths['']))
{
array_unshift($paths[''], JPath::clean($path));
}
}
return $paths[$prefix];
}
/**
* Adds to the stack of model table paths in LIFO order.
*
* @param mixed $path The directory as a string or directories as an array to add.
*
* @return void
*
* @since 12.2
*/
public static function addTablePath($path)
{
JTable::addIncludePath($path);
}
/**
* Create the filename for a resource
*
* @param string $type The resource type to create the filename for.
* @param array $parts An associative array of filename information.
*
* @return string The filename
*
* @since 12.2
*/
protected static function _createFileName($type, $parts = array())
{
$filename = '';
switch ($type)
{
case 'model':
$filename = strtolower($parts['name']) . '.php';
break;
}
return $filename;
}
/**
* Returns a Model object, always creating it
*
* @param string $type The model type to instantiate
* @param string $prefix Prefix for the model class name. Optional.
* @param array $config Configuration array for model. Optional.
*
* @return mixed A model object or false on failure
*
* @since 12.2
*/
public static function getInstance($type, $prefix = '', $config = array())
{
$type = preg_replace('/[^A-Z0-9_\.-]/i', '', $type);
$modelClass = $prefix . ucfirst($type);
if (!class_exists($modelClass))
{
jimport('joomla.filesystem.path');
$path = JPath::find(self::addIncludePath(null, $prefix), self::_createFileName('model', array('name' => $type)));
if (!$path)
{
$path = JPath::find(self::addIncludePath(null, ''), self::_createFileName('model', array('name' => $type)));
}
if ($path)
{
require_once $path;
if (!class_exists($modelClass))
{
JLog::add(JText::sprintf('JLIB_APPLICATION_ERROR_MODELCLASS_NOT_FOUND', $modelClass), JLog::WARNING, 'jerror');
return false;
}
}
else
{
return false;
}
}
return new $modelClass($config);
}
/**
* Constructor
*
* @param array $config An array of configuration options (name, state, dbo, table_path, ignore_request).
*
* @since 12.2
* @throws Exception
*/
public function __construct($config = array())
{
// Guess the option from the class name (Option)Model(View).
if (empty($this->option))
{
$classname = get_class($this);
$modelpos = strpos($classname, 'Model');
if ($modelpos === false)
{
throw new Exception(JText::_('JLIB_APPLICATION_ERROR_MODEL_GET_NAME'), 500);
}
$this->option = 'com_' . strtolower(substr($classname, 0, $modelpos));
}
// Set the view name
if (empty($this->name))
{
if (array_key_exists('name', $config))
{
$this->name = $config['name'];
}
else
{
$this->name = $this->getName();
}
}
// Set the model state
if (array_key_exists('state', $config))
{
$this->state = $config['state'];
}
else
{
$this->state = new JObject;
}
// Set the model dbo
if (array_key_exists('dbo', $config))
{
$this->_db = $config['dbo'];
}
else
{
$this->_db = JFactory::getDbo();
}
// Set the default view search path
if (array_key_exists('table_path', $config))
{
$this->addTablePath($config['table_path']);
}
elseif (defined('JPATH_COMPONENT_ADMINISTRATOR'))
{
$this->addTablePath(JPATH_COMPONENT_ADMINISTRATOR . '/tables');
}
// Set the internal state marker - used to ignore setting state from the request
if (!empty($config['ignore_request']))
{
$this->__state_set = true;
}
// Set the clean cache event
if (isset($config['event_clean_cache']))
{
$this->event_clean_cache = $config['event_clean_cache'];
}
elseif (empty($this->event_clean_cache))
{
$this->event_clean_cache = 'onContentCleanCache';
}
}
/**
* Gets an array of objects from the results of database query.
*
* @param string $query The query.
* @param integer $limitstart Offset.
* @param integer $limit The number of records.
*
* @return array An array of results.
*
* @since 12.2
* @throws RuntimeException
*/
protected function _getList($query, $limitstart = 0, $limit = 0)
{
$this->_db->setQuery($query, $limitstart, $limit);
$result = $this->_db->loadObjectList();
return $result;
}
/**
* Returns a record count for the query
*
* @param string $query The query.
*
* @return integer Number of rows for query
*
* @since 12.2
*/
protected function _getListCount($query)
{
if ($query instanceof JDatabaseQuery)
{
// Create COUNT(*) query to allow database engine to optimize the query.
$query = clone $query;
$query->clear('select')->clear('order')->select('COUNT(*)');
$this->_db->setQuery($query);
return (int) $this->_db->loadResult();
}
else
{
/* Performance of this query is very bad as it forces database engine to go
* through all items in the database. If you don't use JDatabaseQuery object,
* you should override this function in your model.
*/
$this->_db->setQuery($query);
$this->_db->execute();
return $this->_db->getNumRows();
}
}
/**
* Method to load and return a model object.
*
* @param string $name The name of the view
* @param string $prefix The class prefix. Optional.
* @param array $config Configuration settings to pass to JTable::getInstance
*
* @return mixed Model object or boolean false if failed
*
* @since 12.2
* @see JTable::getInstance
*/
protected function _createTable($name, $prefix = 'Table', $config = array())
{
// Clean the model name
$name = preg_replace('/[^A-Z0-9_]/i', '', $name);
$prefix = preg_replace('/[^A-Z0-9_]/i', '', $prefix);
// Make sure we are returning a DBO object
if (!array_key_exists('dbo', $config))
{
$config['dbo'] = $this->getDbo();
}
return JTable::getInstance($name, $prefix, $config);
}
/**
* Method to get the database driver object
*
* @return JDatabaseDriver
*/
public function getDbo()
{
return $this->_db;
}
/**
* Method to get the model name
*
* The model name. By default parsed using the classname or it can be set
* by passing a $config['name'] in the class constructor
*
* @return string The name of the model
*
* @since 12.2
* @throws Exception
*/
public function getName()
{
if (empty($this->name))
{
$classname = get_class($this);
$modelpos = strpos($classname, 'Model');
if ($modelpos === false)
{
throw new Exception(JText::_('JLIB_APPLICATION_ERROR_MODEL_GET_NAME'), 500);
}
$this->name = strtolower(substr($classname, $modelpos + 5));
}
return $this->name;
}
/**
* Method to get model state variables
*
* @param string $property Optional parameter name
* @param mixed $default Optional default value
*
* @return object The property where specified, the state object where omitted
*
* @since 12.2
*/
public function getState($property = null, $default = null)
{
if (!$this->__state_set)
{
// Protected method to auto-populate the model state.
$this->populateState();
// Set the model state set flag to true.
$this->__state_set = true;
}
return $property === null ? $this->state : $this->state->get($property, $default);
}
/**
* Method to get a table object, load it if necessary.
*
* @param string $name The table name. Optional.
* @param string $prefix The class prefix. Optional.
* @param array $options Configuration array for model. Optional.
*
* @return JTable A JTable object
*
* @since 12.2
* @throws Exception
*/
public function getTable($name = '', $prefix = 'Table', $options = array())
{
if (empty($name))
{
$name = $this->getName();
}
if ($table = $this->_createTable($name, $prefix, $options))
{
return $table;
}
throw new Exception(JText::sprintf('JLIB_APPLICATION_ERROR_TABLE_NAME_NOT_SUPPORTED', $name), 0);
}
/**
* Method to auto-populate the model state.
*
* This method should only be called once per instantiation and is designed
* to be called on the first call to the getState() method unless the model
* configuration flag to ignore the request is set.
*
* @return void
*
* @note Calling getState in this method will result in recursion.
* @since 12.2
*/
protected function populateState()
{
}
/**
* Method to set the database driver object
*
* @param JDatabaseDriver $db A JDatabaseDriver based object
*
* @return void
*
* @since 12.2
*/
public function setDbo($db)
{
$this->_db = $db;
}
/**
* Method to set model state variables
*
* @param string $property The name of the property.
* @param mixed $value The value of the property to set or null.
*
* @return mixed The previous value of the property or null if not set.
*
* @since 12.2
*/
public function setState($property, $value = null)
{
return $this->state->set($property, $value);
}
/**
* Clean the cache
*
* @param string $group The cache group
* @param integer $client_id The ID of the client
*
* @return void
*
* @since 12.2
*/
protected function cleanCache($group = null, $client_id = 0)
{
$conf = JFactory::getConfig();
$dispatcher = JEventDispatcher::getInstance();
$options = array(
'defaultgroup' => ($group) ? $group : (isset($this->option) ? $this->option : JFactory::getApplication()->input->get('option')),
'cachebase' => ($client_id) ? JPATH_ADMINISTRATOR . '/cache' : $conf->get('cache_path', JPATH_SITE . '/cache'));
$cache = JCache::getInstance('callback', $options);
$cache->clean();
// Trigger the onContentCleanCache event.
$dispatcher->trigger($this->event_clean_cache, $options);
}
}
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