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<?php
/**
* Kunena Component
* @package Kunena.Framework
* @subpackage Object
*
* @copyright (C) 2008 - 2014 Kunena Team. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
* @link http://www.kunena.org
**/
defined ( '_JEXEC' ) or die ();
/**
* Class KunenaDatabaseObject
*/
abstract class KunenaDatabaseObject extends JObject {
public $id = null;
protected $_name = null;
protected $_table = null;
protected $_exists = false;
protected $_saving = false;
/**
* Returns the global object.
*
* @param int $identifier Object identifier to load.
* @param boolean $reload Force object reload from the database.
*
* @return KunenaDatabaseObject
*/
static public function getInstance($identifier = null, $reload = false) {}
/**
* Returns true if the object exists in the database.
*
* @param boolean $exists Internal parameter to change state.
* @return boolean True if object exists in database.
*/
public function exists($exists = null) {
$return = $this->_exists;
if ($exists !== null) $this->_exists = (bool) $exists;
return $return;
}
/**
* Method to bind an associative array to the instance.
*
* This method optionally takes an array of properties to ignore or allow when binding.
*
* @param array $src An associative array or object to bind to the JTable instance.
* @param array $fields An optional array list of properties to ignore / include only while binding.
* @param boolean $include True to include only listed fields, false to ignore listed fields.
*
* @return boolean True on success.
*/
public function bind(array $src = null, array $fields = null, $include = false) {
if (empty($src)) return false;
if (!empty($fields)) {
$src = $include ? array_intersect_key($src, array_flip($fields)) : array_diff_key($src, array_flip($fields));
}
$this->setProperties ( $src );
return true;
}
/**
* Method to load object from the database.
*
* @param mixed $id Id to be loaded.
*
* @return boolean True on success.
*/
public function load($id = null) {
if ($id !== null) $this->id = intval($id);
// Create the table object
$table = $this->getTable ();
// Load the object based on id
if ($this->id) $this->_exists = $table->load ( $this->id );
// Always set id
$table->id = $this->id;
// Assuming all is well at this point lets bind the data
$this->setProperties ( $table->getProperties () );
return $this->_exists;
}
/**
* Method to save the object to the database.
*
* Before saving the object, this method checks if object can be safely saved.
* It will also trigger onKunenaBeforeSave and onKunenaAfterSave events.
*
* @return boolean True on success.
*/
public function save() {
$this->_saving = true;
// Check the object.
if (! $this->check ()) {
return $this->_saving = false;
}
// Initialize table object.
$table = $this->getTable ();
$table->bind ( $this->getProperties () );
$table->exists ( $this->_exists );
$isNew = ! $this->_exists;
// Check the table object.
if (! $table->check ()) {
$this->setError ( $table->getError () );
return $this->_saving = false;
}
// Include the Kunena plugins for the on save events.
$dispatcher = JDispatcher::getInstance();
JPluginHelper::importPlugin('kunena');
// Trigger the onKunenaBeforeSave event.
$result = $dispatcher->trigger('onKunenaBeforeSave', array("com_kunena.{$this->_name}", &$table, $isNew));
if (in_array(false, $result, true)) {
$this->setError($table->getError());
return $this->_saving = false;
}
// Store the data.
if (!$table->store()) {
$this->setError($table->getError());
return $this->_saving = false;
}
// If item was created, load the object.
if ($isNew) {
$this->load ( $table->id );
}
$this->saveInternal();
// Trigger the onKunenaAfterSave event.
$dispatcher->trigger('onKunenaAfterSave', array("com_kunena.{$this->_name}", &$table, $isNew));
$this->_saving = false;
return true;
}
/**
* Method to delete the object from the database.
*
* @return boolean True on success.
*/
public function delete() {
// TODO: return false
if (!$this->exists()) {
return true;
}
// Initialize table object.
$table = $this->getTable ();
$table->bind ( $this->getProperties () );
$table->exists ( $this->_exists );
// Include the Kunena plugins for the on save events.
$dispatcher = JDispatcher::getInstance();
JPluginHelper::importPlugin('kunena');
// Trigger the onKunenaBeforeDelete event.
$result = $dispatcher->trigger('onKunenaBeforeDelete', array("com_kunena.{$this->_name}", $table));
if (in_array(false, $result, true)) {
$this->setError($table->getError());
return false;
}
if (!$table->delete()) {
$this->setError($table->getError());
return false;
}
$this->_exists = false;
// Trigger the onKunenaAfterDelete event.
$dispatcher->trigger('onKunenaAfterDelete', array("com_kunena.{$this->_name}", $table));
return true;
}
/**
* Method to perform sanity checks on the instance properties to ensure
* they are safe to store in the database.
*
* Child classes should override this method to make sure the data they are storing in
* the database is safe and as expected before storage.
*
* @return boolean True if the instance is sane and able to be stored in the database.
*/
public function check() {
return true;
}
// Internal functions
/**
* Class constructor, overridden in descendant classes.
*
* @param mixed $properties Associative array to set the initial properties of the object.
* If not profided, default values will be used.
*
* @return KunenaDatabaseObject
* @internal
*/
public function __construct(array $properties = null)
{
if (!$this->_name) $this->_name = get_class ($this);
if ($properties) {
$this->bind ($properties);
} else {
$this->load ();
}
}
/**
* Method to get the table object.
*
* @return JTable|KunenaTable The table object.
*/
protected function getTable() {
return JTable::getInstance ( $this->_table, 'Table' );
}
/**
* Internal save method.
*
* @return boolean True on success.
*/
protected function saveInternal() {
return true;
}
}