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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2009 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\Application\ApplicationHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Folder;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Form\FormField;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;
use Joomla\Database\ParameterType;

/**
 * Form Field to display a list of the layouts for a component view from
 * the extension or template overrides.
 *
 * @since  1.6
 */
class ComponentlayoutField extends FormField
{
	/**
	 * The form field type.
	 *
	 * @var    string
	 * @since  1.6
	 */
	protected $type = 'ComponentLayout';

/**
	 * Method to get the field input for a component layout field.
	 *
	 * @return  string   The field input.
	 *
	 * @since   1.6
	 */
	protected function getInput()
	{
		// Get the client id.
		$clientId = $this->element['client_id'];

if ($clientId === null && $this->form instanceof Form)
		{
			$clientId = $this->form->getValue('client_id');
		}

$clientId = (int) $clientId;

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

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

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

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

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

$template_style_id = 0;

if ($this->form instanceof Form)
		{
			$template_style_id = $this->form->getValue('template_style_id');
			$template_style_id = (int) preg_replace('#\W#', '', $template_style_id);
		}

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

// If a template, extension and view are present build the options.
		if ($extension && $view && $client)
		{
			// Load language file
			$lang = Factory::getLanguage();
			$lang->load($extension . '.sys', JPATH_ADMINISTRATOR)
			|| $lang->load($extension . '.sys', JPATH_ADMINISTRATOR . '/components/' . $extension);

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

// Build the query.
			$query->select(
				[
					$db->quoteName('e.element'),
					$db->quoteName('e.name'),
				]
			)
				->from($db->quoteName('#__extensions', 'e'))
				->where(
					[
						$db->quoteName('e.client_id') . ' = :clientId',
						$db->quoteName('e.type') . ' = ' . $db->quote('template'),
						$db->quoteName('e.enabled') . ' = 1',
					]
				)
				->bind(':clientId', $clientId, ParameterType::INTEGER);

if ($template)
			{
				$query->where($db->quoteName('e.element') . ' = :template')
					->bind(':template', $template);
			}

if ($template_style_id)
			{
				$query->join('LEFT', $db->quoteName('#__template_styles', 's'), $db->quoteName('s.template') . ' = ' . $db->quoteName('e.element'))
					->where($db->quoteName('s.id') . ' = :style')
					->bind(':style', $template_style_id, ParameterType::INTEGER);
			}

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

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

// Check if the new layouts folder exists, else use the old one
			if (!is_dir($component_path))
			{
				$component_path = Path::clean($client->path . '/components/' . $extension . '/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 ((string) $this->element['useglobal'] === 'true')
			{
				$groups[Text::_('JOPTION_FROM_STANDARD')]['items'][] = HTMLHelper::_('select.option', '', Text::_('JGLOBAL_USE_GLOBAL'));
			}

// Add the layout options from the component path.
			if (is_dir($component_path) && ($component_layouts = Folder::files($component_path, '^[^_]*\.xml$', false, true)))
			{
				// Create the group for the component
				$groups['_'] = array();
				$groups['_']['id'] = $this->id . '__';
				$groups['_']['text'] = Text::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
					$value = basename($file, '.xml');
					$component_layouts[$i] = $value;
					$text = isset($menu['option']) ? Text::_($menu['option']) : (isset($menu['title']) ? Text::_($menu['title']) : $value);
					$groups['_']['items'][] = HTMLHelper::_('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)
						|| $lang->load('tpl_' . $template->element . '.sys', $client->path . '/templates/' . $template->element);

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

// Add the layout options from the template path.
					if (is_dir($template_path) && ($files = Folder::files($template_path, '^[^_]*\.php$', false, true)))
					{
						foreach ($files as $i => $file)
						{
							// Remove layout files that exist in the component folder
							if (\in_array(basename($file, '.php'), $component_layouts))
							{
								unset($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'] = Text::sprintf('JOPTION_FROM_TEMPLATE', $template->name);
							$groups[$template->name]['items'] = array();

foreach ($files as $file)
							{
								// Add an option to the template group
								$value = basename($file, '.php');
								$text = $lang
									->hasKey(
										$key = strtoupper(
											'TPL_'
											. $template->name
											. '_'
											. $extension
											. '_'
											. $view
											. '_LAYOUT_'
											. $value
										)
									)
									? Text::_($key) : $value;
								$groups[$template->name]['items'][] = HTMLHelper::_('select.option', $template->element . ':' . $value, $text);
							}
						}
					}
				}
			}

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

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

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

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

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