<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Folder module renderer
 *
 * @package   mod_folder
 * @copyright 2009 Petr Skoda  {@link http://skodak.org}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
defined('MOODLE_INTERNAL') || die();

class mod_folder_renderer extends plugin_renderer_base {

    /**
     * Returns html to display the content of mod_folder
     * (Description, folder files and optionally Edit button)
     *
     * @param stdClass $folder record from 'folder' table (please note
     *     it may not contain fields 'revision' and 'timemodified')
     * @return string
     */
    public function display_folder(stdClass $folder) {

<         $output = '';



>         static $treecounter = 0;
> 


        $folderinstances = get_fast_modinfo($folder->course)->get_instances_of('folder');
        if (!isset($folderinstances[$folder->id]) ||
                !($cm = $folderinstances[$folder->id]) ||
                !($context = context_module::instance($cm->id))) {
            // Some error in parameters.
            // Don't throw any errors in renderer, just return empty string.
            // Capability to view module must be checked before calling renderer.

<             return $output;



>             return '';


        }


>         $data = [];


        if (trim($folder->intro)) {

<             if ($folder->display != FOLDER_DISPLAY_INLINE) {
<                 $output .= $this->output->box(format_module_intro('folder', $folder, $cm->id),
<                         'generalbox', 'intro');
<             } else if ($cm->showdescription) {



>             if ($folder->display == FOLDER_DISPLAY_INLINE && $cm->showdescription) {


                // for "display inline" do not filter, filters run at display time.

<                 $output .= format_module_intro('folder', $folder, $cm->id, false);



>                 $data['intro'] = format_module_intro('folder', $folder, $cm->id, false);


            }
        }

< 
<         $foldertree = new folder_tree($folder, $cm);
<         if ($folder->display == FOLDER_DISPLAY_INLINE) {
<             // Display module name as the name of the root directory.
<             $foldertree->dir['dirname'] = $cm->get_formatted_name(array('escape' => false));



>         $buttons = [];
>         // Display the "Edit" button if current user can edit folder contents.
>         // Do not display it on the course page for the teachers because there
>         // is an "Edit settings" option in the action menu with the same functionality.
>         $canmanagefolderfiles = has_capability('mod/folder:managefiles', $context);
>         $canmanagecourseactivities = has_capability('moodle/course:manageactivities', $context);
>         if ($canmanagefolderfiles && ($folder->display != FOLDER_DISPLAY_INLINE || !$canmanagecourseactivities)) {
>             $editbutton = new single_button(new moodle_url('/mod/folder/edit.php', ['id' => $cm->id]),
>                 get_string('edit'), 'post', single_button::BUTTON_PRIMARY);
>             $editbutton->class = 'navitem';
>             $data['edit_button'] = $editbutton->export_for_template($this->output);
>             $data['hasbuttons'] = true;


        }

<         $output .= $this->output->container_start("box generalbox pt-0 pb-3 foldertree");
<         $output .= $this->render($foldertree);
<         $output .= $this->output->container_end();




<         // Do not append the edit button on the course page.


        $downloadable = folder_archive_available($folder, $cm);

< 
<         $buttons = '';


        if ($downloadable) {

<             $downloadbutton = $this->output->single_button(
<                 new moodle_url('/mod/folder/download_folder.php', array('id' => $cm->id)),
<                 get_string('downloadfolder', 'folder')
<             );
< 
<             $buttons .= $downloadbutton;



>             $downloadbutton = new single_button(new moodle_url('/mod/folder/download_folder.php', ['id' => $cm->id]),
>                 get_string('downloadfolder', 'folder'), 'get');
>             $downloadbutton->class = 'navitem ml-auto';
>             $data['download_button'] = $downloadbutton->export_for_template($this->output);
>             $data['hasbuttons'] = true;


        }


<         // Display the "Edit" button if current user can edit folder contents.
<         // Do not display it on the course page for the teachers because there
<         // is an "Edit settings" button right next to it with the same functionality.
<         if (has_capability('mod/folder:managefiles', $context) &&
<             ($folder->display != FOLDER_DISPLAY_INLINE || !has_capability('moodle/course:manageactivities', $context))) {
<             $editbutton = $this->output->single_button(
<                 new moodle_url('/mod/folder/edit.php', array('id' => $cm->id)),
<                 get_string('edit')
<             );
< 
<             $buttons .= $editbutton;



>         $foldertree = new folder_tree($folder, $cm);
>         if ($folder->display == FOLDER_DISPLAY_INLINE) {
>             // Display module name as the name of the root directory.
>             $foldertree->dir['dirname'] = $cm->get_formatted_name(array('escape' => false));


        }


<         if ($buttons) {
<             $output .= $this->output->container_start("box generalbox pt-0 pb-3 folderbuttons");
<             $output .= $buttons;
<             $output .= $this->output->container_end();
<         }



>         $data['id'] = 'folder_tree'. ($treecounter++);
>         $data['showexpanded'] = !empty($foldertree->folder->showexpanded);
>         $data['dir'] = $this->renderable_tree_elements($foldertree, ['files' => [], 'subdirs' => [$foldertree->dir]]);




<         return $output;
<     }
< 
<     public function render_folder_tree(folder_tree $tree) {
<         static $treecounter = 0;
< 
<         $content = '';
<         $id = 'folder_tree'. ($treecounter++);
<         $content .= '<div id="'.$id.'" class="filemanager">';
<         $content .= $this->htmllize_tree($tree, array('files' => array(), 'subdirs' => array($tree->dir)));
<         $content .= '</div>';
<         $showexpanded = true;
<         if (empty($tree->folder->showexpanded)) {
<             $showexpanded = false;
<         }
<         $this->page->requires->js_init_call('M.mod_folder.init_tree', array($id, $showexpanded));
<         return $content;



>         return $this->render_from_template('mod_folder/folder', $data);


    }

    /**
     * Internal function - creates htmls structure suitable for YUI tree.

>      *
     */
>      * @deprecated since Moodle 4.3


    protected function htmllize_tree($tree, $dir) {
        global $CFG;


>         debugging(
        if (empty($dir['subdirs']) and empty($dir['files'])) {
>             'Method htmllize_tree() is deprecated. Please use renderable_tree_elements instead',
            return '';
>             DEBUG_DEVELOPER
        }
>         );
        $result = '<ul>';
> 


        foreach ($dir['subdirs'] as $subdir) {

<             $image = $this->output->pix_icon(file_folder_icon(24), $subdir['dirname'], 'moodle');



>             $image = $this->output->pix_icon(file_folder_icon(), $subdir['dirname'], 'moodle');


            $filename = html_writer::tag('span', $image, array('class' => 'fp-icon')).
                    html_writer::tag('span', s($subdir['dirname']), array('class' => 'fp-filename'));
            $filename = html_writer::tag('div', $filename, array('class' => 'fp-filename-icon'));
            $result .= html_writer::tag('li', $filename. $this->htmllize_tree($tree, $subdir));
        }
        foreach ($dir['files'] as $file) {
            $filename = $file->get_filename();
            $url = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(),
                    $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $filename, false);
            $filenamedisplay = clean_filename($filename);
            if (file_extension_in_typegroup($filename, 'web_image')) {
                $image = $url->out(false, array('preview' => 'tinyicon', 'oid' => $file->get_timemodified()));
                $image = html_writer::empty_tag('img', array('src' => $image));
            } else {

<                 $image = $this->output->pix_icon(file_file_icon($file, 24), $filenamedisplay, 'moodle');



>                 $image = $this->output->pix_icon(file_file_icon($file), $filenamedisplay, 'moodle');


            }
            $filename = html_writer::tag('span', $image, array('class' => 'fp-icon')).
                    html_writer::tag('span', $filenamedisplay, array('class' => 'fp-filename'));
            $urlparams = null;
            if ($tree->folder->forcedownload) {
                $urlparams = ['forcedownload' => 1];
            }
            $filename = html_writer::tag('span',
                html_writer::link($url->out(false, $urlparams), $filename),
                ['class' => 'fp-filename-icon']
            );
            $result .= html_writer::tag('li', $filename);
        }
        $result .= '</ul>';

        return $result;

>     }
    }
> 
}
>     /**

>      * Internal function - Creates elements structure suitable for mod_folder/folder template.
class folder_tree implements renderable {
>      *
    public $context;
>      * @param folder_tree $tree The folder tree to work with.
    public $folder;
>      * @param array $dir The subdir and files structure to convert into a tree.
    public $cm;
>      * @return array The structure to be rendered by mod_folder/folder template.
    public $dir;
>      */

>     protected function renderable_tree_elements(folder_tree $tree, array $dir): array {
    public function __construct($folder, $cm) {
>         if (empty($dir['subdirs']) && empty($dir['files'])) {
        $this->folder = $folder;
>             return [];
        $this->cm     = $cm;
>         }

>         $elements = [];
        $this->context = context_module::instance($cm->id);
>         foreach ($dir['subdirs'] as $subdir) {
        $fs = get_file_storage();
>             $htmllize = $this->renderable_tree_elements($tree, $subdir);
        $this->dir = $fs->get_area_tree($this->context->id, 'mod_folder', 'content', 0);
>             $image = $this->output->pix_icon(file_folder_icon(), $subdir['dirname'], 'moodle');
    }
>             $elements[] = [
}
>                 'name' => $subdir['dirname'],
>                 'icon' => $image,
>                 'subdirs' => $htmllize,
>                 'hassubdirs' => !empty($htmllize),
>             ];
>         }
>         foreach ($dir['files'] as $file) {
>             $filename = $file->get_filename();
>             $filenamedisplay = clean_filename($filename);
> 
>             $url = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(),
>                 $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $filename, false);
>             if (file_extension_in_typegroup($filename, 'web_image')) {
>                 $image = $url->out(false, ['preview' => 'tinyicon', 'oid' => $file->get_timemodified()]);
>                 $image = html_writer::empty_tag('img', ['src' => $image]);
>             } else {
>                 $image = $this->output->pix_icon(file_file_icon($file), $filenamedisplay, 'moodle');
>             }
> 
>             if ($tree->folder->forcedownload) {
>                 $url->param('forcedownload', 1);
>             }
> 
>             $elements[] = [
>                 'name' => $filenamedisplay,
>                 'icon' => $image,
>                 'url' => $url,
>                 'subdirs' => null,
>                 'hassubdirs' => false,
>             ];
>         }
> 
>         return $elements;