<?php
/**
 * @package    Joomla.Component.Builder
 *
 * @created    30th April, 2015
 * @author     Llewellyn van der Merwe <http://www.joomlacomponentbuilder.com>
 * @gitea      Joomla Component Builder <https://git.vdm.dev/joomla/Component-Builder>
 * @github     Joomla Component Builder <https://github.com/vdm-io/Joomla-Component-Builder>
 * @copyright  Copyright (C) 2015 Vast Development Method. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

// No direct access to this file
defined('_JEXEC') or die('Restricted access');

// import the list field type
jimport('joomla.form.helper');
JFormHelper::loadFieldClass('list');

/**
 * Targetfields Form Field class for the Componentbuilder component
 */
class JFormFieldTargetfields extends JFormFieldList
{
	/**
	 * The targetfields field type.
	 *
	 * @var		string
	 */
	public $type = 'targetfields';

	/**
	 * Method to get a list of options for a list input.
	 *
	 * @return	array    An array of JHtml options.
	 */
	protected function getOptions()
	{
		// load the db opbject
		$db = JFactory::getDBO();		
		// get the input from url
		$jinput = JFactory::getApplication()->input;
		// get the id
		$ID = $jinput->getInt('id', 0);
		// get the view name
		$VIEW = $jinput->get('view', null, 'WORD');
		// rest the fields ids
		$fieldIds = array();
		// if this is an actual admin view then we are done
		if ('admin_view'  === $VIEW && is_numeric($ID) && $ID >= 1)
		{
			$adminView = $ID;
		}
		elseif (is_numeric($ID) && $ID >= 1)
		{
			// get the admin view ID
			$adminView = ComponentbuilderHelper::getVar('admin_fields_conditions', (int) $ID, 'id', 'admin_view');
		}
		elseif ('admin_view'  !== $VIEW)
		{
			// get the admin view ID
			$adminView = $jinput->getInt('refid', 0);
		}
		if (isset($adminView) && is_numeric($adminView) && $adminView >= 1)
		{
			// get all the fields linked to the admin view
			if ($addFields = ComponentbuilderHelper::getVar('admin_fields', (int) $adminView, 'admin_view', 'addfields'))
			{
				if (ComponentbuilderHelper::checkJson($addFields))
				{
					$addFields = json_decode($addFields, true);
					if (ComponentbuilderHelper::checkArray($addFields))
					{
						foreach($addFields as $addField)
						{
							if (isset($addField['field']))
							{
								$fieldIds[] = (int) $addField['field'];
							}
						}
					}
				}
			}
		}
		$query = $db->getQuery(true);
		$query->select($db->quoteName(array('a.id','a.name','t.name'),array('id','name','type')));
		$query->from($db->quoteName('#__componentbuilder_field', 'a'));
		$query->join('LEFT', $db->quoteName('#__componentbuilder_fieldtype', 't') . ' ON (' . $db->quoteName('a.fieldtype') . ' = ' . $db->quoteName('t.id') . ')');
		$query->where($db->quoteName('a.published') . ' >= 1');
		// filter by fields linked
		if (ComponentbuilderHelper::checkArray($fieldIds))
		{
			// only load these fields
			$query->where($db->quoteName('a.id') . ' IN (' . implode(',', $fieldIds) . ')');
		}
		$query->order('a.name ASC');
		$db->setQuery((string)$query);
		$items = $db->loadObjectList();
		$options = array();
		if ($items)
		{
			foreach($items as $item)
			{
				$options[] = JHtml::_('select.option', $item->id, $item->name . ' [' . $item->type . ']');
			}
		}
		
		return $options;
	}
}