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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\MVC\Model;
use Joomla\CMS\Cache\CacheControllerFactoryAwareInterface;
use Joomla\CMS\Cache\CacheControllerFactoryAwareTrait;
use Joomla\CMS\Cache\Controller\CallbackController;
use Joomla\CMS\Cache\Exception\CacheExceptionInterface;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Extension\ComponentInterface;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Factory\LegacyFactory;
use Joomla\CMS\MVC\Factory\MVCFactoryAwareTrait;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Factory\MVCFactoryServiceInterface;
use Joomla\CMS\Table\Table;
use Joomla\CMS\User\CurrentUserInterface;
use Joomla\CMS\User\CurrentUserTrait;
use Joomla\Database\DatabaseAwareInterface;
use Joomla\Database\DatabaseAwareTrait;
use Joomla\Database\DatabaseInterface;
use Joomla\Database\DatabaseQuery;
use Joomla\Database\Exception\DatabaseNotFoundException;
use Joomla\Event\DispatcherAwareInterface;
use Joomla\Event\DispatcherAwareTrait;
use Joomla\Event\DispatcherInterface;
use Joomla\Event\Event;
use Joomla\Event\EventInterface;
// phpcs:disable PSR1.Files.SideEffects
\defined('JPATH_PLATFORM') or die;
// phpcs:enable PSR1.Files.SideEffects
/**
* Base class for a database aware Joomla Model
*
* Acts as a Factory class for application specific objects and provides many supporting API functions.
*
* @since 2.5.5
*/
abstract class BaseDatabaseModel extends BaseModel implements
DatabaseModelInterface,
DispatcherAwareInterface,
CurrentUserInterface,
CacheControllerFactoryAwareInterface,
DatabaseAwareInterface
{
use DatabaseAwareTrait;
use MVCFactoryAwareTrait;
use DispatcherAwareTrait;
use CurrentUserTrait;
use CacheControllerFactoryAwareTrait;
/**
* The URL option for the component.
*
* @var string
* @since 3.0
*/
protected $option = null;
/**
* The event to trigger when cleaning cache.
*
* @var string
* @since 3.0
*/
protected $event_clean_cache = null;
/**
* Constructor
*
* @param array $config An array of configuration options (name, state, dbo, table_path, ignore_request).
* @param ?MVCFactoryInterface $factory The factory.
*
* @since 3.0
* @throws \Exception
*/
public function __construct($config = [], MVCFactoryInterface $factory = null)
{
parent::__construct($config);
// Guess the option from the class name (Option)Model(View).
if (empty($this->option)) {
$r = null;
if (!preg_match('/(.*)Model/i', \get_class($this), $r)) {
throw new \Exception(Text::sprintf('JLIB_APPLICATION_ERROR_GET_NAME', __METHOD__), 500);
}
$this->option = ComponentHelper::getComponentName($this, $r[1]);
}
/**
* @deprecated 4.3 will be Removed in 6.0
* Database instance is injected through the setter function,
* subclasses should not use the db instance in constructor anymore
*/
$db = \array_key_exists('dbo', $config) ? $config['dbo'] : Factory::getDbo();
if ($db) {
@trigger_error(sprintf('Database is not available in constructor in 6.0.'), E_USER_DEPRECATED);
$this->setDatabase($db);
// Is needed, when models use the deprecated MVC DatabaseAwareTrait, as the trait is overriding the local functions
$this->setDbo($db);
}
// 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');
$this->addTablePath(JPATH_COMPONENT_ADMINISTRATOR . '/table');
}
// Set the clean cache event
if (isset($config['event_clean_cache'])) {
$this->event_clean_cache = $config['event_clean_cache'];
} elseif (empty($this->event_clean_cache)) {
$this->event_clean_cache = 'onContentCleanCache';
}
if ($factory) {
$this->setMVCFactory($factory);
return;
}
$component = Factory::getApplication()->bootComponent($this->option);
if ($component instanceof MVCFactoryServiceInterface) {
$this->setMVCFactory($component->getMVCFactory());
}
}
/**
* Gets an array of objects from the results of database query.
*
* @param DatabaseQuery|string $query The query.
* @param integer $limitstart Offset.
* @param integer $limit The number of records.
*
* @return object[] An array of results.
*
* @since 3.0
* @throws \RuntimeException
*/
protected function _getList($query, $limitstart = 0, $limit = 0)
{
if (\is_string($query)) {
$query = $this->getDbo()->getQuery(true)->setQuery($query);
}
$query->setLimit($limit, $limitstart);
$this->getDbo()->setQuery($query);
return $this->getDbo()->loadObjectList();
}
/**
* Returns a record count for the query.
*
* Note: Current implementation of this method assumes that getListQuery() returns a set of unique rows,
* thus it uses SELECT COUNT(*) to count the rows. In cases that getListQuery() uses DISTINCT
* then either this method must be overridden by a custom implementation at the derived Model Class
* or a GROUP BY clause should be used to make the set unique.
*
* @param DatabaseQuery|string $query The query.
*
* @return integer Number of rows for query.
*
* @since 3.0
*/
protected function _getListCount($query)
{
// Use fast COUNT(*) on DatabaseQuery objects if there is no GROUP BY or HAVING clause:
if (
$query instanceof DatabaseQuery
&& $query->type === 'select'
&& $query->group === null
&& $query->merge === null
&& $query->querySet === null
&& $query->having === null
) {
$query = clone $query;
$query->clear('select')->clear('order')->clear('limit')->clear('offset')->select('COUNT(*)');
$this->getDbo()->setQuery($query);
return (int) $this->getDbo()->loadResult();
}
// Otherwise fall back to inefficient way of counting all results.
// Remove the limit, offset and order parts if it's a DatabaseQuery object
if ($query instanceof DatabaseQuery) {
$query = clone $query;
$query->clear('limit')->clear('offset')->clear('order');
}
$this->getDbo()->setQuery($query);
$this->getDbo()->execute();
return (int) $this->getDbo()->getNumRows();
}
/**
* Method to load and return a table object.
*
* @param string $name The name of the view
* @param string $prefix The class prefix. Optional.
* @param array $config Configuration settings to pass to Table::getInstance
*
* @return Table|boolean Table object or boolean false if failed
*
* @since 3.0
* @see \JTable::getInstance()
*/
protected function _createTable($name, $prefix = 'Table', $config = [])
{
// Make sure we are returning a DBO object
if (!\array_key_exists('dbo', $config)) {
$config['dbo'] = $this->getDbo();
}
$table = $this->getMVCFactory()->createTable($name, $prefix, $config);
if ($table instanceof CurrentUserInterface) {
$table->setCurrentUser($this->getCurrentUser());
}
return $table;
}
/**
* 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 $options Configuration array for model. Optional.
*
* @return Table A Table object
*
* @since 3.0
* @throws \Exception
*/
public function getTable($name = '', $prefix = '', $options = [])
{
if (empty($name)) {
$name = $this->getName();
}
// We need this ugly code to deal with non-namespaced MVC code
if (empty($prefix) && $this->getMVCFactory() instanceof LegacyFactory) {
$prefix = 'Table';
}
if ($table = $this->_createTable($name, $prefix, $options)) {
return $table;
}
throw new \Exception(Text::sprintf('JLIB_APPLICATION_ERROR_TABLE_NAME_NOT_SUPPORTED', $name), 0);
}
/**
* Method to check if the given record is checked out by the current user
*
* @param \stdClass $item The record to check
*
* @return bool
*/
public function isCheckedOut($item)
{
$table = $this->getTable();
$checkedOutField = $table->getColumnAlias('checked_out');
if (property_exists($item, $checkedOutField) && $item->{$checkedOutField} != $this->getCurrentUser()->id) {
return true;
}
return false;
}
/**
* Clean the cache
*
* @param string $group The cache group
*
* @return void
*
* @since 3.0
*/
protected function cleanCache($group = null)
{
$app = Factory::getApplication();
$options = [
'defaultgroup' => $group ?: ($this->option ?? $app->getInput()->get('option')),
'cachebase' => $app->get('cache_path', JPATH_CACHE),
'result' => true,
];
try {
/** @var CallbackController $cache */
$cache = $this->getCacheControllerFactory()->createCacheController('callback', $options);
$cache->clean();
} catch (CacheExceptionInterface $exception) {
$options['result'] = false;
}
// Trigger the onContentCleanCache event.
$this->dispatchEvent(new Event($this->event_clean_cache, $options));
}
/**
* Boots the component with the given name.
*
* @param string $component The component name, eg. com_content.
*
* @return ComponentInterface The service container
*
* @since 4.0.0
*/
protected function bootComponent($component): ComponentInterface
{
return Factory::getApplication()->bootComponent($component);
}
/**
* Get the event dispatcher.
*
* The override was made to keep a backward compatibility for legacy component.
* TODO: Remove the override in 6.0
*
* @return DispatcherInterface
*
* @since 4.4.0
* @throws \UnexpectedValueException May be thrown if the dispatcher has not been set.
*/
public function getDispatcher()
{
if (!$this->dispatcher) {
@trigger_error(
sprintf('Dispatcher for %s should be set through MVC factory. It will throw an exception in 6.0', __CLASS__),
E_USER_DEPRECATED
);
return Factory::getContainer()->get(DispatcherInterface::class);
}
return $this->dispatcher;
}
/**
* Dispatches the given event on the internal dispatcher, does a fallback to the global one.
*
* @param EventInterface $event The event
*
* @return void
*
* @since 4.1.0
*
* @deprecated 4.4 will be removed in 6.0. Use $this->getDispatcher() directly.
*/
protected function dispatchEvent(EventInterface $event)
{
$this->getDispatcher()->dispatch($event->getName(), $event);
@trigger_error(
sprintf(
'Method %s is deprecated and will be removed in 6.0. Use getDispatcher()->dispatch() directly.',
__METHOD__
),
E_USER_DEPRECATED
);
}
/**
* Get the database driver.
*
* @return DatabaseInterface The database driver.
*
* @since 4.2.0
* @throws \UnexpectedValueException
*
* @deprecated 4.3 will be removed in 6.0
* Use getDatabase() instead
* Example: $model->getDatabase();
*/
public function getDbo()
{
try {
return $this->getDatabase();
} catch (DatabaseNotFoundException $e) {
throw new \UnexpectedValueException('Database driver not set in ' . __CLASS__);
}
}
/**
* Set the database driver.
*
* @param ?DatabaseInterface $db The database driver.
*
* @return void
*
* @since 4.2.0
*
* @deprecated 4.3 will be removed in 6.0
* Use setDatabase() instead
* Example: $model->setDatabase($db);
*/
public function setDbo(DatabaseInterface $db = null)
{
if ($db === null) {
return;
}
$this->setDatabase($db);
}
/**
* Proxy for _db variable.
*
* @param string $name The name of the element
*
* @return mixed The value of the element if set, null otherwise
*
* @since 4.2.0
*
* @deprecated 4.3 will be removed in 6.0
* Use getDatabase() instead of directly accessing _db
*/
public function __get($name)
{
if ($name === '_db') {
return $this->getDbo();
}
// Default the variable
if (!isset($this->$name)) {
$this->$name = null;
}
return $this->$name;
}
}