<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

JFormHelper::loadFieldClass('list');

/**
 * Supports an custom SQL select list
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldSQL extends JFormFieldList
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	public $type = 'SQL';

	/**
	 * Method to get the custom field options.
	 * Use the query attribute to supply a query to generate the list.
	 *
	 * @return  array  The field option objects.
	 *
	 * @since   11.1
	 */
	protected function getOptions()
	{
		// Initialize variables.
		$options = array();

		// Initialize some field attributes.
		$key = $this->element['key_field'] ? (string) $this->element['key_field'] : 'value';
		$value = $this->element['value_field'] ? (string) $this->element['value_field'] : (string) $this->element['name'];
		$translate = $this->element['translate'] ? (string) $this->element['translate'] : false;
		$query = (string) $this->element['query'];

		// Get the database object.
		$db = JFactory::getDBO();

		// Set the query and get the result list.
		$db->setQuery($query);
		$items = $db->loadObjectlist();

		// Check for an error.
		if ($db->getErrorNum())
		{
			JError::raiseWarning(500, $db->getErrorMsg());
			return $options;
		}

		// Build the field options.
		if (!empty($items))
		{
			foreach ($items as $item)
			{
				if ($translate == true)
				{
					$options[] = JHtml::_('select.option', $item->$key, JText::_($item->$value));
				}
				else
				{
					$options[] = JHtml::_('select.option', $item->$key, $item->$value);
				}
			}
		}

		// Merge any additional options in the XML definition.
		$options = array_merge(parent::getOptions(), $options);

		return $options;
	}
}
