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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

jimport('joomla.html.html');
jimport('joomla.filesystem.file');
jimport('joomla.filesystem.folder');
jimport('joomla.form.formfield');
jimport('joomla.form.helper');

/**
 * Form Field to display a list of the layouts for a component view from 
 * the extension or template overrides.
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormFieldComponentLayout extends JFormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  11.1
	 */
	protected $type = 'ComponentLayout';

/**
	 * Method to get the field input for a component layout field.
	 *
	 * @return  string   The field input.
	 *
	 * @since   11.1
	 */
	protected function getInput()
	{
		// Initialize variables.

// Get the client id.
		$clientId = $this->element['client_id'];

if (is_null($clientId) && $this->form instanceof JForm) {
			$clientId = $this->form->getValue('client_id');
		}
		$clientId = (int) $clientId;

$client	= JApplicationHelper::getClientInfo($clientId);

// Get the extension.
		$extn = (string) $this->element['extension'];

if (empty($extn) && ($this->form instanceof JForm)) {
			$extn = $this->form->getValue('extension');
		}

$extn = preg_replace('#\W#', '', $extn);

// Get the template.
		$template = (string) $this->element['template'];
		$template = preg_replace('#\W#', '', $template);

// Get the style.
		if ($this->form instanceof JForm) {
			$template_style_id = $this->form->getValue('template_style_id');
		}

$template_style_id = preg_replace('#\W#', '', $template_style_id);

// Get the view.
		$view = (string) $this->element['view'];
		$view = preg_replace('#\W#', '', $view);

// If a template, extension and view are present build the options.
		if ($extn && $view && $client) {

// Load language file
			$lang = JFactory::getLanguage();
			$lang->load($extn.'.sys', JPATH_ADMINISTRATOR, null, false, false)
			||	$lang->load($extn.'.sys', JPATH_ADMINISTRATOR.'/components/'.$extn, null, false, false)
			||	$lang->load($extn.'.sys', JPATH_ADMINISTRATOR, $lang->getDefault(), false, false)
			||	$lang->load($extn.'.sys', JPATH_ADMINISTRATOR.'/components/'.$extn, $lang->getDefault(), false, false);

// Get the database object and a new query object.
			$db		= JFactory::getDBO();
			$query	= $db->getQuery(true);

// Build the query.
			$query->select('e.element, e.name');
			$query->from('#__extensions as e');
			$query->where('e.client_id = '.(int) $clientId);
			$query->where('e.type = '.$db->quote('template'));
			$query->where('e.enabled = 1');

if ($template) {
				$query->where('e.element = '.$db->quote($template));
			}

if ($template_style_id) {
				$query->join('LEFT', '#__template_styles as s on s.template=e.element');
				$query->where('s.id='.(int)$template_style_id);
			}

// Set the query and load the templates.
			$db->setQuery($query);
			$templates = $db->loadObjectList('element');

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

// Build the search paths for component layouts.
			$component_path = JPath::clean($client->path.'/components/'.$extn.'/views/'.$view.'/tmpl');

// Prepare array of component layouts
			$component_layouts = array();

// Prepare the grouped list
			$groups=array();

// Add a Use Global option if useglobal="true" in XML file
			if ($this->element['useglobal'] == 'true') {
				$groups[JText::_('JOPTION_FROM_STANDARD')]['items'][]	= JHtml::_('select.option', '', JText::_('JGLOBAL_USE_GLOBAL'));
			}

// Add the layout options from the component path.
			if (is_dir($component_path) && ($component_layouts = JFolder::files($component_path, '^[^_]*\.xml$', false, true))) {
				// Create the group for the component
				$groups['_']			= array();
				$groups['_']['id']		= $this->id.'__';
				$groups['_']['text']	= JText::sprintf('JOPTION_FROM_COMPONENT');
				$groups['_']['items']	= array();

foreach ($component_layouts as $i=>$file)
			{
					// Attempt to load the XML file.
					if (!$xml = simplexml_load_file($file)) {
						unset($component_layouts[$i]);

continue;
			}

// Get the help data from the XML file if present.
					if (!$menu = $xml->xpath('layout[1]')) {
						unset($component_layouts[$i]);

continue;
					}

$menu = $menu[0];

// Add an option to the component group
					$value = JFile::stripext(JFile::getName($file));
					$component_layouts[$i] = $value;
					$text = isset($menu['option']) ? JText::_($menu['option']) : (isset($menu['title']) ? JText::_($menu['title']) : $value);
					$groups['_']['items'][]	= JHtml::_('select.option', '_:'.$value, $text);
				}
			}

// Loop on all templates
			if ($templates)
			{
				foreach ($templates as $template)
				{
					// Load language file
					$lang->load('tpl_'.$template->element.'.sys', $client->path, null, false, false)
					||	$lang->load('tpl_'.$template->element.'.sys', $client->path.'/templates/'.$template->element, null, false, false)
					||	$lang->load('tpl_'.$template->element.'.sys', $client->path, $lang->getDefault(), false, false)
					||	$lang->load('tpl_'.$template->element.'.sys', $client->path.'/templates/'.$template->element, $lang->getDefault(), false, false);

$template_path = JPath::clean($client->path.'/templates/'.$template->element.'/html/'.$extn.'/'.$view);

// Add the layout options from the template path.
					if (is_dir($template_path) && ($files = JFolder::files($template_path, '^[^_]*\.php$', false, true)))
					{
						// Files with corresponding XML files are alternate menu items, not alternate layout files
						// so we need to exclude these files from the list.
						$xml_files = JFolder::files($template_path, '^[^_]*\.xml$', false, true);
						for ($j = 0, $count = count($xml_files); $j < $count; $j++)
						{
							$xml_files[$j] = JFile::stripext(JFile::getName($xml_files[$j]));
						}
						foreach ($files as $i => $file)
						{
							// Remove layout files that exist in the component folder or that have XML files
							if ((in_array(JFile::stripext(JFile::getName($file)), $component_layouts))
							|| (in_array(JFile::stripext(JFile::getName($file)), $xml_files)))
							{
								unset($files[$i]);
							}
						}
						if (count($files))
						{
							// Create the group for the template
							$groups[$template->name]=array();
							$groups[$template->name]['id']=$this->id.'_'.$template->element;
							$groups[$template->name]['text']=JText::sprintf('JOPTION_FROM_TEMPLATE', $template->name);
							$groups[$template->name]['items']=array();

foreach ($files as $file)
							{
								// Add an option to the template group
								$value = JFile::stripext(JFile::getName($file));
								$text = $lang->hasKey($key = strtoupper('TPL_'.$template->name.'_'.$extn.'_'.$view.'_LAYOUT_'.$value)) ? JText::_($key) : $value;
								$groups[$template->name]['items'][]	= JHtml::_('select.option', $template->element.':'.$value, $text);
							}
						}
					}
				}
			}

// Compute attributes for the grouped list
			$attr = $this->element['size'] ? ' size="'.(int) $this->element['size'].'"' : '';

// Prepare HTML code
			$html = array();

// Compute the current selected values
			$selected = array($this->value);

// Add a grouped list
			$html[] = JHtml::_('select.groupedlist', $groups, $this->name, array('id'=>$this->id, 'group.id'=>'id', 'list.attr'=>$attr, 'list.select'=>$selected));

return implode($html);
		}
		else
		{
			return '';
		}
	}
}