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Filename : ContentType.php
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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Table;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Language\Text;
use Joomla\Database\DatabaseDriver;

/**
 * Tags table
 *
 * @since  3.1
 */
class ContentType extends Table
{
	/**
	 * Constructor
	 *
	 * @param   DatabaseDriver  $db  A database connector object
	 *
	 * @since   3.1
	 */
	public function __construct(DatabaseDriver $db)
	{
		parent::__construct('#__content_types', 'type_id', $db);
	}

	/**
	 * Overloaded check method to ensure data integrity.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   3.1
	 * @throws  \UnexpectedValueException
	 */
	public function check()
	{
		try
		{
			parent::check();
		}
		catch (\Exception $e)
		{
			$this->setError($e->getMessage());

			return false;
		}

		// Check for valid name.
		if (trim($this->type_title) === '')
		{
			throw new \UnexpectedValueException(sprintf('The title is empty'));
		}

		$this->type_title = ucfirst($this->type_title);

		if (empty($this->type_alias))
		{
			throw new \UnexpectedValueException(sprintf('The type_alias is empty'));
		}

		return true;
	}

	/**
	 * Overridden Table::store.
	 *
	 * @param   boolean  $updateNulls  True to update fields even if they are null.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   3.1
	 */
	public function store($updateNulls = false)
	{
		// Verify that the alias is unique
		$table = Table::getInstance('Contenttype', 'JTable', array('dbo' => $this->getDbo()));

		if ($table->load(array('type_alias' => $this->type_alias)) && ($table->type_id != $this->type_id || $this->type_id == 0))
		{
			$this->setError(Text::_('COM_TAGS_ERROR_UNIQUE_ALIAS'));

			return false;
		}

		return parent::store($updateNulls);
	}

	/**
	 * Method to expand the field mapping
	 *
	 * @param   boolean  $assoc  True to return an associative array.
	 *
	 * @return  mixed  Array or object with field mappings. Defaults to object.
	 *
	 * @since   3.1
	 */
	public function fieldmapExpand($assoc = true)
	{
		return $this->fieldmap = json_decode($this->fieldmappings, $assoc);
	}

	/**
	 * Method to get the id given the type alias
	 *
	 * @param   string  $typeAlias  Content type alias (for example, 'com_content.article').
	 *
	 * @return  mixed  type_id for this alias if successful, otherwise null.
	 *
	 * @since   3.2
	 */
	public function getTypeId($typeAlias)
	{
		$db = $this->_db;
		$query = $db->getQuery(true);
		$query->select($db->quoteName('type_id'))
			->from($db->quoteName($this->_tbl))
			->where($db->quoteName('type_alias') . ' = :type_alias')
			->bind(':type_alias', $typeAlias);
		$db->setQuery($query);

		return $db->loadResult();
	}

	/**
	 * Method to get the Table object for the content type from the table object.
	 *
	 * @return  mixed  Table object on success, otherwise false.
	 *
	 * @since   3.2
	 *
	 * @throws  \RuntimeException
	 */
	public function getContentTable()
	{
		$result = false;
		$tableInfo = json_decode($this->table);

		if (\is_object($tableInfo) && isset($tableInfo->special))
		{
			if (\is_object($tableInfo->special) && isset($tableInfo->special->type) && isset($tableInfo->special->prefix))
			{
				$class = $tableInfo->special->class ?? 'Joomla\\CMS\\Table\\Table';

				if (!class_implements($class, 'Joomla\\CMS\\Table\\TableInterface'))
				{
					// This isn't an instance of TableInterface. Abort.
					throw new \RuntimeException('Class must be an instance of Joomla\\CMS\\Table\\TableInterface');
				}

				$result = $class::getInstance($tableInfo->special->type, $tableInfo->special->prefix);
			}
		}

		return $result;
	}
}