repository/draftfiles_ajax.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * Draft file ajax file manager
  20  *
  21  * @package    core
  22  * @subpackage repository
  23  * @copyright  2010 Dongsheng Cai <dongsheng@moodle.com>
  24  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  */
  26
  27 define('AJAX_SCRIPT', true);
  28
  29 require('../config.php');
  30 require_once($CFG->libdir.'/filelib.php');
  31 require_once($CFG->libdir.'/adminlib.php');
  32 require_once($CFG->dirroot.'/repository/lib.php');
  33 $PAGE->set_context(context_system::instance());
  34 require_login();
  35 if (isguestuser()) {
  36     throw new \moodle_exception('noguest');
  37 }
  38 require_sesskey();
  39
  40 $action  = required_param('action', PARAM_ALPHA);
  41 $draftid = required_param('itemid', PARAM_INT);
  42 $filepath = optional_param('filepath', '/', PARAM_PATH);
  43
  44 $usercontext = context_user::instance($USER->id);
  45
  46 echo $OUTPUT->header(); // send headers
  47
  48 //
  49 //NOTE TO ALL DEVELOPERS: this script must deal only with draft area of current user, it has to use only file_storage and no file_browser!!
  50 //
  51
  52 switch ($action) {
  53     case 'dir':
  54         $data = new stdClass();
  55         file_get_drafarea_folders($draftid, $filepath, $data);
  56         echo json_encode($data);
  57         die;
  58
  59     case 'list':
  60         $filepath = optional_param('filepath', '/', PARAM_PATH);
  61
  62         $data = repository::prepare_listing(file_get_drafarea_files($draftid, $filepath));
  63         $info = file_get_draft_area_info($draftid);
  64         $data->filecount = $info['filecount'];
  65         $data->filesize = $info['filesize'];
  66         $data->tree = new stdClass();
  67         file_get_drafarea_folders($draftid, '/', $data->tree);
  68         echo json_encode($data);
  69         die;
  70
  71     case 'mkdir':
  72         $filepath   = required_param('filepath', PARAM_PATH);
  73         $newdirname = required_param('newdirname', PARAM_FILE);
  74
  75         $fs = get_file_storage();
  76         $fs->create_directory($usercontext->id, 'user', 'draft', $draftid, file_correct_filepath(file_correct_filepath($filepath).$newdirname));
  77         $return = new stdClass();
  78         $return->filepath = $filepath;
  79         echo json_encode($return);
  80         die;
  81
  82     case 'delete':
  83         $filename   = required_param('filename', PARAM_FILE);
  84         $filepath   = required_param('filepath', PARAM_PATH);
  85         $selectedfile = (object)[
  86             'filename' => $filename,
  87             'filepath' => $filepath
  88         ];
  89         $return = repository_delete_selected_files($usercontext, 'user', 'draft', $draftid, [$selectedfile]);
  90
  91         if ($return) {
  92             $response = new stdClass();
  93             $response->filepath = array_keys($return)[0];
  94             echo json_encode($response);
  95             die;
  96         }
  97
  98         echo json_encode(false);
  99         die;
 100
 101     case 'deleteselected':
 102         $selected   = required_param('selected', PARAM_RAW);
 103         $return = [];
 104         $selectedfiles = json_decode($selected);
 105         $return = repository_delete_selected_files($usercontext, 'user', 'draft', $draftid, $selectedfiles);
 106         echo (json_encode($return ? array_keys($return) : false));
 107         die;
 108
 109     case 'setmainfile':
 110         $filename   = required_param('filename', PARAM_FILE);
 111         $filepath   = required_param('filepath', PARAM_PATH);
 112
 113         $filepath = file_correct_filepath($filepath);
 114         // reset sort order
 115         file_reset_sortorder($usercontext->id, 'user', 'draft', $draftid);
 116         // set main file
 117         $return = file_set_sortorder($usercontext->id, 'user', 'draft', $draftid, $filepath, $filename, 1);
 118         echo json_encode($return);
 119         die;
 120
 121     case 'updatefile':
 122         // Allows to Rename file, move it to another directory, change it's license and author information in one request
 123         $filename    = required_param('filename', PARAM_FILE);
 124         $filepath    = required_param('filepath', PARAM_PATH);
 125         $updatedata = array();
 126         $updatedata['filename'] = optional_param('newfilename', $filename, PARAM_FILE);
 127         $updatedata['filepath'] = $newfilepath = optional_param('newfilepath', $filepath, PARAM_PATH);
 128         if (($v = optional_param('newlicense', false, PARAM_TEXT)) !== false) {
 129             $updatedata['license'] = $v;
 130         }
 131         if (($v = optional_param('newauthor', false, PARAM_TEXT)) !== false) {
 132             $updatedata['author'] = $v;
 133         }
 134         try {
 135             repository::update_draftfile($draftid, $filepath, $filename, $updatedata);
 136         } catch (moodle_exception $e) {
 137             die(json_encode((object)array('error' => $e->getMessage())));
 138         }
 139         die(json_encode((object)array('filepath' => $newfilepath)));
 140
 141     case 'updatedir':
 142         $filepath = required_param('filepath', PARAM_PATH);
 143         $newdirname = required_param('newdirname', PARAM_FILE);
 144         $parent = required_param('newfilepath', PARAM_PATH);
 145         $newfilepath = clean_param($parent . '/' . $newdirname . '/', PARAM_PATH);
 146         try {
 147             repository::update_draftfile($draftid, $filepath, '.', array('filepath' => $newfilepath));
 148         } catch (moodle_exception $e) {
 149             die(json_encode((object)array('error' => $e->getMessage())));
 150         }
 151         die(json_encode((object)array('filepath' => $parent)));
 152
 153     case 'zip':
 154         $filepath = required_param('filepath', PARAM_PATH);
 155
 156         $zipper = get_file_packer('application/zip');
 157         $fs = get_file_storage();
 158
 159         $file = $fs->get_file($usercontext->id, 'user', 'draft', $draftid, $filepath, '.');
 160
 161         $parent_path = $file->get_parent_directory()->get_filepath();
 162
 163         $filepath = explode('/', trim($file->get_filepath(), '/'));
 164         $filepath = array_pop($filepath);
 165         $zipfile = repository::get_unused_filename($draftid, $parent_path, $filepath . '.zip');
 166
 167         if ($newfile = $zipper->archive_to_storage([$filepath => $file], $usercontext->id, 'user', 'draft', $draftid, $parent_path, $zipfile, $USER->id)) {
 168             $return = new stdClass();
 169             $return->filepath = $parent_path;
 170             echo json_encode($return);
 171         } else {
 172             echo json_encode(false);
 173         }
 174         die;
 175     case 'downloadselected':
 176         $selected   = required_param('selected', PARAM_RAW);
 177         $selectedfiles = json_decode($selected);
 178         if (!count($selectedfiles)) {
 179             $filepath = required_param('filepath', PARAM_PATH);
 180             $selectedfiles = [(object)[
 181                 'filename' => '',
 182                 'filepath' => $filepath
 183             ]];
 184         }
 185         $return = repository_download_selected_files($usercontext, 'user', 'draft', $draftid, $selectedfiles);
 186         echo (json_encode($return));
 187         die;
 188
 189     case 'downloaddir':
 190         $filepath = required_param('filepath', PARAM_PATH);
 191
 192         $selectedfile = (object)[
 193             'filename' => '',
 194             'filepath' => $filepath
 195         ];
 196         $return = repository_download_selected_files($usercontext, 'user', 'draft', $draftid, [$selectedfile]);
 197         echo json_encode($return);
 198         die;
 199
 200     case 'unzip':
 201         $filename = required_param('filename', PARAM_FILE);
 202         $filepath = required_param('filepath', PARAM_PATH);
 203         $areamaxbytes = required_param('areamaxbytes', PARAM_INT);
 204
 205         $return = new stdClass();
 206         $zipper = get_file_packer('application/zip');
 207         $fs = get_file_storage();
 208         $file = $fs->get_file($usercontext->id, 'user', 'draft', $draftid, $filepath, $filename);
 209         // Get the total size of the content in the archive.
 210         $filecontentsize = $file->get_total_content_size($zipper);
 211
 212         // Return an error if the returned size of the content is NULL.
 213         // This means the utility class was unable to read the content of the archive.
 214         if (is_null($filecontentsize)) {
 215             $return->error = get_string('cannotunzipcontentunreadable', 'repository');
 216             die(json_encode($return));
 217         }
 218
 219         // Check whether the maximum size allowed in this draft area will be exceeded with unzipping the file.
 220         // If the maximum size allowed is exceeded, return an error before attempting to unzip.
 221         if (file_is_draft_area_limit_reached($draftid, $areamaxbytes, $filecontentsize)) {
 222             $return->error = get_string('cannotunzipquotaexceeded', 'repository');
 223             die(json_encode($return));
 224         }
 225
 226         // Find unused name for directory to extract the archive.
 227         $temppath = $fs->get_unused_dirname($usercontext->id, 'user', 'draft', $draftid, $filepath. pathinfo($filename, PATHINFO_FILENAME). '/');
 228         $donotremovedirs = array();
 229         $doremovedirs = array($temppath);
 230
 231         // Extract archive and move all files from $temppath to $filepath
 232         if (($processed = $file->extract_to_storage($zipper, $usercontext->id, 'user', 'draft', $draftid, $temppath, $USER->id))
 233                 !== false) {
 234
 235             // Find all failures within the processed files, and return an error if any are found.
 236             $failed = array_filter($processed, static function($result): bool {
 237                 return $result !== true;
 238             });
 239             if (count($failed) > 0) {
 240                 $return->error = get_string('cannotunzipextractfileerror',  'repository');
 241                 die(json_encode($return));
 242             }
 243
 244             $extractedfiles = $fs->get_directory_files($usercontext->id, 'user', 'draft', $draftid, $temppath, true);
 245             $xtemppath = preg_quote($temppath, '|');
 246             foreach ($extractedfiles as $file) {
 247                 $realpath = preg_replace('|^'.$xtemppath.'|', $filepath, $file->get_filepath());
 248                 if (!$file->is_directory()) {
 249                     // Set the source to the extracted file to indicate that it came from archive.
 250                     $file->set_source(serialize((object)array('source' => $filepath)));
 251                 }
 252                 if (!$fs->file_exists($usercontext->id, 'user', 'draft', $draftid, $realpath, $file->get_filename())) {
 253                     // File or directory did not exist, just move it.
 254                     $file->rename($realpath, $file->get_filename());
 255                 } else if (!$file->is_directory()) {
 256                     // File already existed, overwrite it
 257                     repository::overwrite_existing_draftfile($draftid, $realpath, $file->get_filename(), $file->get_filepath(), $file->get_filename());
 258                 } else {
 259                     // Directory already existed, remove temporary dir but make sure we don't remove the existing dir
 260                     $doremovedirs[] = $file->get_filepath();
 261                     $donotremovedirs[] = $realpath;
 262                 }
 263             }
 264             $return->filepath = $filepath;
 265         } else {
 266             $return = false;
 267         }
 268         // Remove remaining temporary directories.
 269         foreach (array_diff($doremovedirs, $donotremovedirs) as $filepath) {
 270             if ($file = $fs->get_file($usercontext->id, 'user', 'draft', $draftid, $filepath, '.')) {
 271                 $file->delete();
 272             }
 273         }
 274         die(json_encode($return));
 275
 276     case 'getoriginal':
 277         $filename    = required_param('filename', PARAM_FILE);
 278         $filepath    = required_param('filepath', PARAM_PATH);
 279
 280         $fs = get_file_storage();
 281         $file = $fs->get_file($usercontext->id, 'user', 'draft', $draftid, $filepath, $filename);
 282         if (!$file) {
 283             echo json_encode(false);
 284         } else {
 285             $return = array('filename' => $filename, 'filepath' => $filepath, 'original' => $file->get_reference_details());
 286             echo json_encode((object)$return);
 287         }
 288         die;
 289
 290     case 'getreferences':
 291         $filename    = required_param('filename', PARAM_FILE);
 292         $filepath    = required_param('filepath', PARAM_PATH);
 293
 294         $fs = get_file_storage();
 295         $file = $fs->get_file($usercontext->id, 'user', 'draft', $draftid, $filepath, $filename);
 296         if (!$file) {
 297             echo json_encode(false);
 298         } else {
 299             $source = unserialize($file->get_source());
 300             $return = array('filename' => $filename, 'filepath' => $filepath, 'references' => array());
 301             $browser = get_file_browser();
 302             if (isset($source->original)) {
 303                 $reffiles = $fs->search_references($source->original);
 304                 foreach ($reffiles as $reffile) {
 305                     $refcontext = context::instance_by_id($reffile->get_contextid());
 306                     $fileinfo = $browser->get_file_info($refcontext, $reffile->get_component(), $reffile->get_filearea(), $reffile->get_itemid(), $reffile->get_filepath(), $reffile->get_filename());
 307                     if (empty($fileinfo)) {
 308                         $return['references'][] = get_string('undisclosedreference', 'repository');
 309                     } else {
 310                         $return['references'][] = $fileinfo->get_readable_fullname();
 311                     }
 312                 }
 313             }
 314             echo json_encode((object)$return);
 315         }
 316         die;
 317
 318     default:
 319         // no/unknown action?
 320         echo json_encode(false);
 321         die;
 322 }