<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_menus
 *
 * @copyright   (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Menus\Administrator\Model;

use Joomla\CMS\Application\ApplicationHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Folder;
use Joomla\CMS\MVC\Model\BaseDatabaseModel;
use Joomla\CMS\Object\CMSObject;
use Joomla\Component\Menus\Administrator\Helper\MenusHelper;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Menu Item Types Model for Menus.
 *
 * @since  1.6
 */
class MenutypesModel extends BaseDatabaseModel
{
    /**
     * A reverse lookup of the base link URL to Title
     *
     * @var  array
     */
    protected $rlu = array();

    /**
     * Method to auto-populate the model state.
     *
     * This method should only be called once per instantiation and is designed
     * to be called on the first call to the getState() method unless the model
     * configuration flag to ignore the request is set.
     *
     * @return  void
     *
     * @note    Calling getState in this method will result in recursion.
     * @since   3.0.1
     */
    protected function populateState()
    {
        parent::populateState();

        $clientId = Factory::getApplication()->input->get('client_id', 0);

        $this->state->set('client_id', $clientId);
    }

    /**
     * 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()
    {
        $lang = Factory::getLanguage();
        $list = array();

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

        foreach ($components as $component) {
            $options = $this->getTypeOptionsByComponent($component->option);

            if ($options) {
                $list[$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)
                                || $lang->load($option->request['option'] . '.sys', $componentLanguageFolder);
                        }
                    }
                }
            }
        }

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

        return $list;
    }

    /**
     * Method to create the reverse lookup for link-to-name.
     * (can be used from onAfterGetMenuTypeOptions handlers)
     *
     * @param   CMSObject  $option  Object with request array or string and title public variables
     *
     * @return  void
     *
     * @since   3.1
     */
    public function addReverseLookupUrl($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();
        $client  = ApplicationHelper::getClientInfo($this->getState('client_id'));
        $mainXML = $client->path . '/components/' . $component . '/metadata.xml';

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

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

        if ($client->id == 1 && empty($options)) {
            $options = $this->getTypeOptionsFromManifest($component);
        }

        return $options;
    }

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

        // Process each child as an option.
        foreach ($children as $child) {
            if ($child->getName() == 'option') {
                // Create the menu option for the component.
                $o = new CMSObject();
                $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 CMSObject();
                $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  $component  Component option like in URLs
     *
     * @return  array|boolean
     *
     * @since   1.6
     */
    protected function getTypeOptionsFromMvc($component)
    {
        $options = array();
        $views   = array();

        foreach ($this->getFolders($component) as $path) {
            if (!is_dir($path)) {
                continue;
            }

            $views = array_merge($views, Folder::folders($path, '.', false, true));
        }

        foreach ($views as $viewPath) {
            $view = basename($viewPath);

            // Ignore private views.
            if (strpos($view, '_') !== 0) {
                // Determine if a metadata file exists for the view.
                $file = $viewPath . '/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 CMSObject();
                                            $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 CMSObject();
                                            $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 menu types from Component manifest
     *
     * @param   string  $component  Component option like in URLs
     *
     * @return  array|boolean
     *
     * @since   3.7.0
     */
    protected function getTypeOptionsFromManifest($component)
    {
        // Load the component manifest
        $fileName = JPATH_ADMINISTRATOR . '/components/' . $component . '/' . str_replace('com_', '', $component) . '.xml';

        if (!is_file($fileName)) {
            return false;
        }

        if (!($manifest = simplexml_load_file($fileName))) {
            return false;
        }

        // Check for a valid XML root tag.
        if ($manifest->getName() != 'extension') {
            return false;
        }

        $options = array();

        // Start with the component root menu.
        $rootMenu = $manifest->administration->menu;

        // If the menu item doesn't exist or is hidden do nothing.
        if (!$rootMenu || in_array((string) $rootMenu['hidden'], array('true', 'hidden'))) {
            return $options;
        }

        // Create the root menu option.
        $ro = new \stdClass();
        $ro->title       = (string) trim($rootMenu);
        $ro->description = '';
        $ro->request     = array('option' => $component);

        // Process submenu options.
        $submenu = $manifest->administration->submenu;

        if (!$submenu) {
            return $options;
        }

        foreach ($submenu->menu as $child) {
            $attributes = $child->attributes();

            $o = new \stdClass();
            $o->title       = (string) trim($child);
            $o->description = '';

            if ((string) $attributes->link) {
                parse_str((string) $attributes->link, $request);
            } else {
                $request = array();

                $request['option']     = $component;
                $request['act']        = (string) $attributes->act;
                $request['task']       = (string) $attributes->task;
                $request['controller'] = (string) $attributes->controller;
                $request['view']       = (string) $attributes->view;
                $request['layout']     = (string) $attributes->layout;
                $request['sub']        = (string) $attributes->sub;
            }

            $o->request = array_filter($request, 'strlen');
            $options[]  = new CMSObject($o);

            // Do not repeat the default view link (index.php?option=com_abc).
            if (count($o->request) == 1) {
                $ro = null;
            }
        }

        if ($ro) {
            $options[] = new CMSObject($ro);
        }

        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        = Factory::getLanguage();
        $client      = ApplicationHelper::getClientInfo($this->getState('client_id'));

        // Get the views for this component.
        foreach ($this->getFolders($component) as $folder) {
            $path = $folder . '/' . $view . '/tmpl';

            if (!is_dir($path)) {
                $path = $folder . '/' . $view;
            }

            if (!is_dir($path)) {
                continue;
            }

            $layouts = array_merge($layouts, Folder::files($path, '.xml$', false, true));
        }

        // 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)
        $folders = Folder::folders($client->path . '/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', $client->path)
                || $lang->load('tpl_' . $template . '.sys', $client->path . '/templates/' . $template);

                $templateLayouts = Folder::files($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 CMSObject();
                $o->title       = ucfirst($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;
    }

    /**
     * Get the folders with template files for the given component.
     *
     * @param   string  $component  Component option as in URLs
     *
     * @return  array
     *
     * @since   4.0.0
     */
    private function getFolders($component)
    {
        $client  = ApplicationHelper::getClientInfo($this->getState('client_id'));

        if (!is_dir($client->path . '/components/' . $component)) {
            return array();
        }

        $folders = Folder::folders($client->path . '/components/' . $component, '^view[s]?$', false, true);
        $folders = array_merge($folders, Folder::folders($client->path . '/components/' . $component, '^tmpl?$', false, true));

        if (!$folders) {
            return array();
        }

        return $folders;
    }
}