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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2009 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;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Form\FormFactoryAwareInterface;
use Joomla\CMS\Form\FormFactoryAwareTrait;
use Joomla\CMS\Form\FormFactoryInterface;
use Joomla\CMS\Form\FormRule;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\Plugin\PluginHelper;

/**
 * Prototype form model.
 *
 * @see    Form
 * @see    FormField
 * @see    FormRule
 * @since  1.6
 */
abstract class FormModel extends BaseDatabaseModel implements FormFactoryAwareInterface, FormModelInterface
{
	use FormBehaviorTrait;
	use FormFactoryAwareTrait;

	/**
	 * Maps events to plugin groups.
	 *
	 * @var    array
	 * @since  3.6
	 */
	protected $events_map = null;

	/**
	 * Constructor
	 *
	 * @param   array                 $config       An array of configuration options (name, state, dbo, table_path, ignore_request).
	 * @param   MVCFactoryInterface   $factory      The factory.
	 * @param   FormFactoryInterface  $formFactory  The form factory.
	 *
	 * @since   3.6
	 * @throws  \Exception
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null, FormFactoryInterface $formFactory = null)
	{
		$config['events_map'] = $config['events_map'] ?? array();

		$this->events_map = array_merge(
			array('validate' => 'content'),
			$config['events_map']
		);

		parent::__construct($config, $factory);

		$this->setFormFactory($formFactory);
	}

	/**
	 * Method to checkin a row.
	 *
	 * @param   integer  $pk  The numeric id of the primary key.
	 *
	 * @return  boolean  False on failure or error, true otherwise.
	 *
	 * @since   1.6
	 */
	public function checkin($pk = null)
	{
		// Only attempt to check the row in if it exists.
		if ($pk)
		{
			$user = Factory::getUser();

			// Get an instance of the row to checkin.
			$table = $this->getTable();

			if (!$table->load($pk))
			{
				$this->setError($table->getError());

				return false;
			}

			// If there is no checked_out or checked_out_time field, just return true.
			if (!$table->hasField('checked_out') || !$table->hasField('checked_out_time'))
			{
				return true;
			}

			$checkedOutField = $table->getColumnAlias('checked_out');

			// Check if this is the user having previously checked out the row.
			if ($table->$checkedOutField > 0 && $table->$checkedOutField != $user->get('id') && !$user->authorise('core.manage', 'com_checkin'))
			{
				$this->setError(Text::_('JLIB_APPLICATION_ERROR_CHECKIN_USER_MISMATCH'));

				return false;
			}

			// Attempt to check the row in.
			if (!$table->checkIn($pk))
			{
				$this->setError($table->getError());

				return false;
			}
		}

		return true;
	}

	/**
	 * Method to check-out a row for editing.
	 *
	 * @param   integer  $pk  The numeric id of the primary key.
	 *
	 * @return  boolean  False on failure or error, true otherwise.
	 *
	 * @since   1.6
	 */
	public function checkout($pk = null)
	{
		// Only attempt to check the row in if it exists.
		if ($pk)
		{
			// Get an instance of the row to checkout.
			$table = $this->getTable();

			if (!$table->load($pk))
			{
				if ($table->getError() === false)
				{
					// There was no error returned, but false indicates that the row did not exist in the db, so probably previously deleted.
					$this->setError(Text::_('JLIB_APPLICATION_ERROR_NOT_EXIST'));
				}
				else
				{
					$this->setError($table->getError());
				}

				return false;
			}

			// If there is no checked_out or checked_out_time field, just return true.
			if (!$table->hasField('checked_out') || !$table->hasField('checked_out_time'))
			{
				return true;
			}

			$user            = Factory::getUser();
			$checkedOutField = $table->getColumnAlias('checked_out');

			// Check if this is the user having previously checked out the row.
			if ($table->$checkedOutField > 0 && $table->$checkedOutField != $user->get('id'))
			{
				$this->setError(Text::_('JLIB_APPLICATION_ERROR_CHECKOUT_USER_MISMATCH'));

				return false;
			}

			// Attempt to check the row out.
			if (!$table->checkOut($user->get('id'), $pk))
			{
				$this->setError($table->getError());

				return false;
			}
		}

		return true;
	}

	/**
	 * Method to validate the form data.
	 *
	 * @param   Form    $form   The form to validate against.
	 * @param   array   $data   The data to validate.
	 * @param   string  $group  The name of the field group to validate.
	 *
	 * @return  array|boolean  Array of filtered data if valid, false otherwise.
	 *
	 * @see     FormRule
	 * @see     InputFilter
	 * @since   1.6
	 */
	public function validate($form, $data, $group = null)
	{
		// Include the plugins for the delete events.
		PluginHelper::importPlugin($this->events_map['validate']);

		$dispatcher = Factory::getContainer()->get('dispatcher');

		if (!empty($dispatcher->getListeners('onUserBeforeDataValidation')))
		{
			@trigger_error(
				'The `onUserBeforeDataValidation` event is deprecated and will be removed in 5.0.'
				. 'Use the `onContentValidateData` event instead.',
				E_USER_DEPRECATED
			);

			Factory::getApplication()->triggerEvent('onUserBeforeDataValidation', array($form, &$data));
		}

		Factory::getApplication()->triggerEvent('onContentBeforeValidateData', array($form, &$data));

		// Filter and validate the form data.
		$data = $form->filter($data);
		$return = $form->validate($data, $group);

		// Check for an error.
		if ($return instanceof \Exception)
		{
			$this->setError($return->getMessage());

			return false;
		}

		// Check the validation results.
		if ($return === false)
		{
			// Get the validation messages from the form.
			foreach ($form->getErrors() as $message)
			{
				$this->setError($message);
			}

			return false;
		}

		// Tags B/C break at 3.1.2
		if (!isset($data['tags']) && isset($data['metadata']['tags']))
		{
			$data['tags'] = $data['metadata']['tags'];
		}

		return $data;
	}
}