<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_menus
 *
 * @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

jimport('joomla.filesystem.folder');
jimport('joomla.filesystem.path');
/**
 * Menu Item Types Model for Menus.
 *
 * @since  1.6
 */
class MenusModelMenutypes extends JModelLegacy
{
	/**
	 * A reverse lookup of the base link URL to Title
	 *
	 * @var  array
	 */
	protected $rlu = array();

	/**
	 * Method to get the reverse lookup of the base link URL to Title
	 *
	 * @return  array  Array of reverse lookup of the base link URL to Title
	 *
	 * @since   1.6
	 */
	public function getReverseLookup()
	{
		if (empty($this->rlu))
		{
			$this->getTypeOptions();
		}

		return $this->rlu;
	}

	/**
	 * Method to get the available menu item type options.
	 *
	 * @return  array  Array of groups with menu item types.
	 *
	 * @since   1.6
	 */
	public function getTypeOptions()
	{
		jimport('joomla.filesystem.file');

		$lang = JFactory::getLanguage();
		$list = array();

		// Get the list of components.
		$db = $this->getDbo();
		$query = $db->getQuery(true)
			->select('name, element AS ' . $db->quoteName('option'))
			->from('#__extensions')
			->where('type = ' . $db->quote('component'))
			->where('enabled = 1')
			->order('name ASC');
		$db->setQuery($query);
		$components = $db->loadObjectList();

		foreach ($components as $component)
		{
			if ($options = $this->getTypeOptionsByComponent($component->option))
			{
				$list[$component->name] = $options;

				// Create the reverse lookup for link-to-name.
				foreach ($options as $option)
				{
					if (isset($option->request))
					{
						$this->addReverseLookupUrl($option);

						if (isset($option->request['option']))
						{
							$componentLanguageFolder = JPATH_ADMINISTRATOR . '/components/' . $option->request['option'];
							$lang->load($option->request['option'] . '.sys', JPATH_ADMINISTRATOR, null, false, true)
								||	$lang->load($option->request['option'] . '.sys', $componentLanguageFolder, null, false, true);
						}
					}
				}
			}
		}

		// Allow a system plugin to insert dynamic menu types to the list shown in menus:
		JEventDispatcher::getInstance()->trigger('onAfterGetMenuTypeOptions', array(&$list, $this));

		return $list;
	}

	/**
	 * Method to create the reverse lookup for link-to-name.
	 * (can be used from onAfterGetMenuTypeOptions handlers)
	 *
	 * @param   JObject  $option  with request array or string and title public variables
	 *
	 * @return  void
	 *
	 * @since   3.1
	 */
	public function addReverseLookupUrl($option)
	{
		$this->rlu[MenusHelper::getLinkKey($option->request)] = $option->get('title');
	}

	/**
	 * Get menu types by component.
	 *
	 * @param   string  $component  Component URL option.
	 *
	 * @return  array
	 *
	 * @since   1.6
	 */
	protected function getTypeOptionsByComponent($component)
	{
		$options = array();

		$mainXML = JPATH_SITE . '/components/' . $component . '/metadata.xml';

		if (is_file($mainXML))
		{
			$options = $this->getTypeOptionsFromXml($mainXML, $component);
		}

		if (empty($options))
		{
			$options = $this->getTypeOptionsFromMvc($component);
		}

		return $options;
	}

	/**
	 * Get the menu types from an XML file
	 *
	 * @param   string  $file       File path
	 * @param   string  $component  Component option as in URL
	 *
	 * @return  array
	 *
	 * @since   1.6
	 */
	protected function getTypeOptionsFromXml($file, $component)
	{
		$options = array();

		// Attempt to load the xml file.
		if (!$xml = simplexml_load_file($file))
		{
			return false;
		}

		// Look for the first menu node off of the root node.
		if (!$menu = $xml->xpath('menu[1]'))
		{
			return false;
		}
		else
		{
			$menu = $menu[0];
		}

		// If we have no options to parse, just add the base component to the list of options.
		if (!empty($menu['options']) && $menu['options'] == 'none')
		{
			// Create the menu option for the component.
			$o = new JObject;
			$o->title       = (string) $menu['name'];
			$o->description = (string) $menu['msg'];
			$o->request     = array('option' => $component);

			$options[] = $o;

			return $options;
		}

		// Look for the first options node off of the menu node.
		if (!$optionsNode = $menu->xpath('options[1]'))
		{
			return false;
		}
		else
		{
			$optionsNode = $optionsNode[0];
		}

		// Make sure the options node has children.
		if (!$children = $optionsNode->children())
		{
			return false;
		}
		else
		{
			// Process each child as an option.
			foreach ($children as $child)
			{
				if ($child->getName() == 'option')
				{
					// Create the menu option for the component.
					$o = new JObject;
					$o->title       = (string) $child['name'];
					$o->description = (string) $child['msg'];
					$o->request     = array('option' => $component, (string) $optionsNode['var'] => (string) $child['value']);

					$options[] = $o;
				}
				elseif ($child->getName() == 'default')
				{
					// Create the menu option for the component.
					$o = new JObject;
					$o->title       = (string) $child['name'];
					$o->description = (string) $child['msg'];
					$o->request     = array('option' => $component);

					$options[] = $o;
				}
			}
		}

		return $options;
	}

	/**
	 * Get menu types from MVC
	 *
	 * @param   string  $component  Component option like in URLs
	 *
	 * @return  array
	 *
	 * @since   1.6
	 */
	protected function getTypeOptionsFromMvc($component)
	{
		$options = array();

		// Get the views for this component.
		if (is_dir(JPATH_SITE . '/components/' . $component))
		{
			$folders = JFolder::folders(JPATH_SITE . '/components/' . $component, '^view[s]?$', false, true);
		}

		$path = '';

		if (!empty($folders[0]))
		{
			$path = $folders[0];
		}

		if (is_dir($path))
		{
			$views = JFolder::folders($path);
		}
		else
		{
			return false;
		}

		foreach ($views as $view)
		{
			// Ignore private views.
			if (strpos($view, '_') !== 0)
			{
				// Determine if a metadata file exists for the view.
				$file = $path . '/' . $view . '/metadata.xml';

				if (is_file($file))
				{
					// Attempt to load the xml file.
					if ($xml = simplexml_load_file($file))
					{
						// Look for the first view node off of the root node.
						if ($menu = $xml->xpath('view[1]'))
						{
							$menu = $menu[0];

							// If the view is hidden from the menu, discard it and move on to the next view.
							if (!empty($menu['hidden']) && $menu['hidden'] == 'true')
							{
								unset($xml);
								continue;
							}

							// Do we have an options node or should we process layouts?
							// Look for the first options node off of the menu node.
							if ($optionsNode = $menu->xpath('options[1]'))
							{
								$optionsNode = $optionsNode[0];

								// Make sure the options node has children.
								if ($children = $optionsNode->children())
								{
									// Process each child as an option.
									foreach ($children as $child)
									{
										if ($child->getName() == 'option')
										{
											// Create the menu option for the component.
											$o = new JObject;
											$o->title       = (string) $child['name'];
											$o->description = (string) $child['msg'];
											$o->request     = array('option' => $component, 'view' => $view, (string) $optionsNode['var'] => (string) $child['value']);

											$options[] = $o;
										}
										elseif ($child->getName() == 'default')
										{
											// Create the menu option for the component.
											$o = new JObject;
											$o->title       = (string) $child['name'];
											$o->description = (string) $child['msg'];
											$o->request     = array('option' => $component, 'view' => $view);

											$options[] = $o;
										}
									}
								}
							}
							else
							{
								$options = array_merge($options, (array) $this->getTypeOptionsFromLayouts($component, $view));
							}
						}

						unset($xml);
					}
				}
				else
				{
					$options = array_merge($options, (array) $this->getTypeOptionsFromLayouts($component, $view));
				}
			}
		}

		return $options;
	}

	/**
	 * Get the menu types from component layouts
	 *
	 * @param   string  $component  Component option as in URLs
	 * @param   string  $view       Name of the view
	 *
	 * @return  array
	 *
	 * @since   1.6
	 */
	protected function getTypeOptionsFromLayouts($component, $view)
	{
		$options     = array();
		$layouts     = array();
		$layoutNames = array();
		$lang        = JFactory::getLanguage();
		$path        = '';

		// Get the views for this component.
		if (is_dir(JPATH_SITE . '/components/' . $component))
		{
			$folders = JFolder::folders(JPATH_SITE . '/components/' . $component, '^view[s]?$', false, true);
		}

		if (!empty($folders[0]))
		{
			$path = $folders[0] . '/' . $view . '/tmpl';
		}

		if (is_dir($path))
		{
			$layouts = array_merge($layouts, JFolder::files($path, '.xml$', false, true));
		}
		else
		{
			return $options;
		}

		// Build list of standard layout names
		foreach ($layouts as $layout)
		{
			// Ignore private layouts.
			if (strpos(basename($layout), '_') === false)
			{
				// Get the layout name.
				$layoutNames[] = basename($layout, '.xml');
			}
		}

		// Get the template layouts
		// TODO: This should only search one template -- the current template for this item (default of specified)
		$folders = JFolder::folders(JPATH_SITE . '/templates', '', false, true);

		// Array to hold association between template file names and templates
		$templateName = array();

		foreach ($folders as $folder)
		{
			if (is_dir($folder . '/html/' . $component . '/' . $view))
			{
				$template = basename($folder);
				$lang->load('tpl_' . $template . '.sys', JPATH_SITE, null, false, true)
				|| $lang->load('tpl_' . $template . '.sys', JPATH_SITE . '/templates/' . $template, null, false, true);

				$templateLayouts = JFolder::files($folder . '/html/' . $component . '/' . $view, '.xml$', false, true);

				foreach ($templateLayouts as $layout)
				{
					// Get the layout name.
					$templateLayoutName = basename($layout, '.xml');

					// Add to the list only if it is not a standard layout
					if (array_search($templateLayoutName, $layoutNames) === false)
					{
						$layouts[] = $layout;

						// Set template name array so we can get the right template for the layout
						$templateName[$layout] = basename($folder);
					}
				}
			}
		}

		// Process the found layouts.
		foreach ($layouts as $layout)
		{
			// Ignore private layouts.
			if (strpos(basename($layout), '_') === false)
			{
				$file = $layout;

				// Get the layout name.
				$layout = basename($layout, '.xml');

				// Create the menu option for the layout.
				$o = new JObject;
				$o->title       = ucfirst($layout);
				$o->description = '';
				$o->request     = array('option' => $component, 'view' => $view);

				// Only add the layout request argument if not the default layout.
				if ($layout != 'default')
				{
					// If the template is set, add in format template:layout so we save the template name
					$o->request['layout'] = (isset($templateName[$file])) ? $templateName[$file] . ':' . $layout : $layout;
				}

				// Load layout metadata if it exists.
				if (is_file($file))
				{
					// Attempt to load the xml file.
					if ($xml = simplexml_load_file($file))
					{
						// Look for the first view node off of the root node.
						if ($menu = $xml->xpath('layout[1]'))
						{
							$menu = $menu[0];

							// If the view is hidden from the menu, discard it and move on to the next view.
							if (!empty($menu['hidden']) && $menu['hidden'] == 'true')
							{
								unset($xml);
								unset($o);
								continue;
							}

							// Populate the title and description if they exist.
							if (!empty($menu['title']))
							{
								$o->title = trim((string) $menu['title']);
							}

							if (!empty($menu->message[0]))
							{
								$o->description = trim((string) $menu->message[0]);
							}
						}
					}
				}

				// Add the layout to the options array.
				$options[] = $o;
			}
		}

		return $options;
	}
}
