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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Form\Field;

\defined('JPATH_PLATFORM') or die;

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

/**
 * Form Field class for the Joomla Platform.
 * Provides a list of available database connections, optionally limiting to
 * a given list.
 *
 * @see    DatabaseDriver
 * @since  1.7.3
 */
class DatabaseconnectionField extends ListField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  1.7.3
	 */
	protected $type = 'Databaseconnection';

/**
	 * Method to get the list of database options.
	 *
	 * This method produces a drop down list of available databases supported
	 * by DatabaseDriver classes that are also supported by the application.
	 *
	 * @return  array  The field option objects.
	 *
	 * @since   1.7.3
	 * @see     DatabaseDriver::getConnectors()
	 */
	protected function getOptions()
	{
		// This gets the connectors available in the platform and supported by the server.
		$available = array_map('strtolower', DatabaseDriver::getConnectors());

/**
		 * This gets the list of database types supported by the application.
		 * This should be entered in the form definition as a comma separated list.
		 * If no supported databases are listed, it is assumed all available databases
		 * are supported.
		 */
		$supported = $this->element['supported'];

if (!empty($supported))
		{
			$supported = explode(',', $supported);

foreach ($supported as $support)
			{
				if (\in_array($support, $available))
				{
					$options[$support] = Text::_(ucfirst($support));
				}
			}
		}
		else
		{
			foreach ($available as $support)
			{
				$options[$support] = Text::_(ucfirst($support));
			}
		}

// This will come into play if an application is installed that requires
		// a database that is not available on the server.
		if (empty($options))
		{
			$options[''] = Text::_('JNONE');
		}

return $options;
	}
}