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Differences Between: [Versions 39 and 310] [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   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   * Private resource module utility functions
  20   *
  21   * @package    mod_resource
  22   * @copyright  2009 Petr Skoda  {@link http://skodak.org}
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  defined('MOODLE_INTERNAL') || die;
  27  
  28  require_once("$CFG->libdir/filelib.php");
  29  require_once("$CFG->libdir/resourcelib.php");
  30  require_once("$CFG->dirroot/mod/resource/lib.php");
  31  
  32  /**
  33   * Redirected to migrated resource if needed,
  34   * return if incorrect parameters specified
  35   * @param int $oldid
  36   * @param int $cmid
  37   * @return void
  38   */
  39  function resource_redirect_if_migrated($oldid, $cmid) {
  40      global $DB, $CFG;
  41  
  42      if ($oldid) {
  43          $old = $DB->get_record('resource_old', array('oldid'=>$oldid));
  44      } else {
  45          $old = $DB->get_record('resource_old', array('cmid'=>$cmid));
  46      }
  47  
  48      if (!$old) {
  49          return;
  50      }
  51  
  52      redirect("$CFG->wwwroot/mod/$old->newmodule/view.php?id=".$old->cmid);
  53  }
  54  
  55  /**
  56   * Display embedded resource file.
  57   * @param object $resource
  58   * @param object $cm
  59   * @param object $course
  60   * @param stored_file $file main file
  61   * @return does not return
  62   */
  63  function resource_display_embed($resource, $cm, $course, $file) {
  64      global $CFG, $PAGE, $OUTPUT;
  65  
  66      $clicktoopen = resource_get_clicktoopen($file, $resource->revision);
  67  
  68      $context = context_module::instance($cm->id);
  69      $moodleurl = moodle_url::make_pluginfile_url($context->id, 'mod_resource', 'content', $resource->revision,
  70              $file->get_filepath(), $file->get_filename());
  71  
  72      $mimetype = $file->get_mimetype();
  73      $title    = $resource->name;
  74  
  75      $extension = resourcelib_get_extension($file->get_filename());
  76  
  77      $mediamanager = core_media_manager::instance($PAGE);
  78      $embedoptions = array(
  79          core_media_manager::OPTION_TRUSTED => true,
  80          core_media_manager::OPTION_BLOCK => true,
  81      );
  82  
  83      if (file_mimetype_in_typegroup($mimetype, 'web_image')) {  // It's an image
  84          $code = resourcelib_embed_image($moodleurl->out(), $title);
  85  
  86      } else if ($mimetype === 'application/pdf') {
  87          // PDF document
  88          $code = resourcelib_embed_pdf($moodleurl->out(), $title, $clicktoopen);
  89  
  90      } else if ($mediamanager->can_embed_url($moodleurl, $embedoptions)) {
  91          // Media (audio/video) file.
  92          $code = $mediamanager->embed_url($moodleurl, $title, 0, 0, $embedoptions);
  93  
  94      } else {
  95          // We need a way to discover if we are loading remote docs inside an iframe.
  96          $moodleurl->param('embed', 1);
  97  
  98          // anything else - just try object tag enlarged as much as possible
  99          $code = resourcelib_embed_general($moodleurl, $title, $clicktoopen, $mimetype);
 100      }
 101  
 102      resource_print_header($resource, $cm, $course);
 103      resource_print_heading($resource, $cm, $course);
 104  
 105      echo $code;
 106  
 107      resource_print_intro($resource, $cm, $course);
 108  
 109      echo $OUTPUT->footer();
 110      die;
 111  }
 112  
 113  /**
 114   * Display resource frames.
 115   * @param object $resource
 116   * @param object $cm
 117   * @param object $course
 118   * @param stored_file $file main file
 119   * @return does not return
 120   */
 121  function resource_display_frame($resource, $cm, $course, $file) {
 122      global $PAGE, $OUTPUT, $CFG;
 123  
 124      $frame = optional_param('frameset', 'main', PARAM_ALPHA);
 125  
 126      if ($frame === 'top') {
 127          $PAGE->set_pagelayout('frametop');
 128          resource_print_header($resource, $cm, $course);
 129          resource_print_heading($resource, $cm, $course);
 130          resource_print_intro($resource, $cm, $course);
 131          echo $OUTPUT->footer();
 132          die;
 133  
 134      } else {
 135          $config = get_config('resource');
 136          $context = context_module::instance($cm->id);
 137          $path = '/'.$context->id.'/mod_resource/content/'.$resource->revision.$file->get_filepath().$file->get_filename();
 138          $fileurl = file_encode_url($CFG->wwwroot.'/pluginfile.php', $path, false);
 139          $navurl = "$CFG->wwwroot/mod/resource/view.php?id=$cm->id&amp;frameset=top";
 140          $title = strip_tags(format_string($course->shortname.': '.$resource->name));
 141          $framesize = $config->framesize;
 142          $contentframetitle = s(format_string($resource->name));
 143          $modulename = s(get_string('modulename','resource'));
 144          $dir = get_string('thisdirection', 'langconfig');
 145  
 146          $file = <<<EOF
 147  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
 148  <html dir="$dir">
 149    <head>
 150      <meta http-equiv="content-type" content="text/html; charset=utf-8" />
 151      <title>$title</title>
 152    </head>
 153    <frameset rows="$framesize,*">
 154      <frame src="$navurl" title="$modulename" />
 155      <frame src="$fileurl" title="$contentframetitle" />
 156    </frameset>
 157  </html>
 158  EOF;
 159  
 160          @header('Content-Type: text/html; charset=utf-8');
 161          echo $file;
 162          die;
 163      }
 164  }
 165  
 166  /**
 167   * Internal function - create click to open text with link.
 168   */
 169  function resource_get_clicktoopen($file, $revision, $extra='') {
 170      global $CFG;
 171  
 172      $filename = $file->get_filename();
 173      $path = '/'.$file->get_contextid().'/mod_resource/content/'.$revision.$file->get_filepath().$file->get_filename();
 174      $fullurl = file_encode_url($CFG->wwwroot.'/pluginfile.php', $path, false);
 175  
 176      $string = get_string('clicktoopen2', 'resource', "<a href=\"$fullurl\" $extra>$filename</a>");
 177  
 178      return $string;
 179  }
 180  
 181  /**
 182   * Internal function - create click to open text with link.
 183   */
 184  function resource_get_clicktodownload($file, $revision) {
 185      global $CFG;
 186  
 187      $filename = $file->get_filename();
 188      $path = '/'.$file->get_contextid().'/mod_resource/content/'.$revision.$file->get_filepath().$file->get_filename();
 189      $fullurl = file_encode_url($CFG->wwwroot.'/pluginfile.php', $path, true);
 190  
 191      $string = get_string('clicktodownload', 'resource', "<a href=\"$fullurl\">$filename</a>");
 192  
 193      return $string;
 194  }
 195  
 196  /**
 197   * Print resource info and workaround link when JS not available.
 198   * @param object $resource
 199   * @param object $cm
 200   * @param object $course
 201   * @param stored_file $file main file
 202   * @return does not return
 203   */
 204  function resource_print_workaround($resource, $cm, $course, $file) {
 205      global $CFG, $OUTPUT;
 206  
 207      resource_print_header($resource, $cm, $course);
 208      resource_print_heading($resource, $cm, $course, true);
 209      resource_print_intro($resource, $cm, $course, true);
 210  
 211      $resource->mainfile = $file->get_filename();
 212      echo '<div class="resourceworkaround">';
 213      switch (resource_get_final_display_type($resource)) {
 214          case RESOURCELIB_DISPLAY_POPUP:
 215              $path = '/'.$file->get_contextid().'/mod_resource/content/'.$resource->revision.$file->get_filepath().$file->get_filename();
 216              $fullurl = file_encode_url($CFG->wwwroot.'/pluginfile.php', $path, false);
 217              $options = empty($resource->displayoptions) ? [] : (array) unserialize_array($resource->displayoptions);
 218              $width  = empty($options['popupwidth'])  ? 620 : $options['popupwidth'];
 219              $height = empty($options['popupheight']) ? 450 : $options['popupheight'];
 220              $wh = "width=$width,height=$height,toolbar=no,location=no,menubar=no,copyhistory=no,status=no,directories=no,scrollbars=yes,resizable=yes";
 221              $extra = "onclick=\"window.open('$fullurl', '', '$wh'); return false;\"";
 222              echo resource_get_clicktoopen($file, $resource->revision, $extra);
 223              break;
 224  
 225          case RESOURCELIB_DISPLAY_NEW:
 226              $extra = 'onclick="this.target=\'_blank\'"';
 227              echo resource_get_clicktoopen($file, $resource->revision, $extra);
 228              break;
 229  
 230          case RESOURCELIB_DISPLAY_DOWNLOAD:
 231              echo resource_get_clicktodownload($file, $resource->revision);
 232              break;
 233  
 234          case RESOURCELIB_DISPLAY_OPEN:
 235          default:
 236              echo resource_get_clicktoopen($file, $resource->revision);
 237              break;
 238      }
 239      echo '</div>';
 240  
 241      echo $OUTPUT->footer();
 242      die;
 243  }
 244  
 245  /**
 246   * Print resource header.
 247   * @param object $resource
 248   * @param object $cm
 249   * @param object $course
 250   * @return void
 251   */
 252  function resource_print_header($resource, $cm, $course) {
 253      global $PAGE, $OUTPUT;
 254  
 255      $PAGE->set_title($course->shortname.': '.$resource->name);
 256      $PAGE->set_heading($course->fullname);
 257      $PAGE->set_activity_record($resource);
 258      echo $OUTPUT->header();
 259  }
 260  
 261  /**
 262   * Print resource heading.
 263   * @param object $resource
 264   * @param object $cm
 265   * @param object $course
 266   * @param bool $notused This variable is no longer used
 267   * @return void
 268   */
 269  function resource_print_heading($resource, $cm, $course, $notused = false) {
 270      global $OUTPUT;
 271      echo $OUTPUT->heading(format_string($resource->name), 2);
 272  }
 273  
 274  
 275  /**
 276   * Gets details of the file to cache in course cache to be displayed using {@link resource_get_optional_details()}
 277   *
 278   * @param object $resource Resource table row (only property 'displayoptions' is used here)
 279   * @param object $cm Course-module table row
 280   * @return string Size and type or empty string if show options are not enabled
 281   */
 282  function resource_get_file_details($resource, $cm) {
 283      $options = empty($resource->displayoptions) ? [] : (array) unserialize_array($resource->displayoptions);
 284      $filedetails = array();
 285      if (!empty($options['showsize']) || !empty($options['showtype']) || !empty($options['showdate'])) {
 286          $context = context_module::instance($cm->id);
 287          $fs = get_file_storage();
 288          $files = $fs->get_area_files($context->id, 'mod_resource', 'content', 0, 'sortorder DESC, id ASC', false);
 289          // For a typical file resource, the sortorder is 1 for the main file
 290          // and 0 for all other files. This sort approach is used just in case
 291          // there are situations where the file has a different sort order.
 292          $mainfile = $files ? reset($files) : null;
 293          if (!empty($options['showsize'])) {
 294              $filedetails['size'] = 0;
 295              foreach ($files as $file) {
 296                  // This will also synchronize the file size for external files if needed.
 297                  $filedetails['size'] += $file->get_filesize();
 298                  if ($file->get_repository_id()) {
 299                      // If file is a reference the 'size' attribute can not be cached.
 300                      $filedetails['isref'] = true;
 301                  }
 302              }
 303          }
 304          if (!empty($options['showtype'])) {
 305              if ($mainfile) {
 306                  $filedetails['type'] = get_mimetype_description($mainfile);
 307                  $filedetails['mimetype'] = $mainfile->get_mimetype();
 308                  // Only show type if it is not unknown.
 309                  if ($filedetails['type'] === get_mimetype_description('document/unknown')) {
 310                      $filedetails['type'] = '';
 311                  }
 312              } else {
 313                  $filedetails['type'] = '';
 314              }
 315          }
 316          if (!empty($options['showdate'])) {
 317              if ($mainfile) {
 318                  // Modified date may be up to several minutes later than uploaded date just because
 319                  // teacher did not submit the form promptly. Give teacher up to 5 minutes to do it.
 320                  if ($mainfile->get_timemodified() > $mainfile->get_timecreated() + 5 * MINSECS) {
 321                      $filedetails['modifieddate'] = $mainfile->get_timemodified();
 322                  } else {
 323                      $filedetails['uploadeddate'] = $mainfile->get_timecreated();
 324                  }
 325                  if ($mainfile->get_repository_id()) {
 326                      // If main file is a reference the 'date' attribute can not be cached.
 327                      $filedetails['isref'] = true;
 328                  }
 329              } else {
 330                  $filedetails['uploadeddate'] = '';
 331              }
 332          }
 333      }
 334      return $filedetails;
 335  }
 336  
 337  /**
 338   * Gets optional details for a resource, depending on resource settings.
 339   *
 340   * Result may include the file size and type if those settings are chosen,
 341   * or blank if none.
 342   *
 343   * @param object $resource Resource table row (only property 'displayoptions' is used here)
 344   * @param object $cm Course-module table row
 345   * @return string Size and type or empty string if show options are not enabled
 346   */
 347  function resource_get_optional_details($resource, $cm) {
 348      global $DB;
 349  
 350      $details = '';
 351  
 352      $options = empty($resource->displayoptions) ? [] : (array) unserialize_array($resource->displayoptions);
 353      if (!empty($options['showsize']) || !empty($options['showtype']) || !empty($options['showdate'])) {
 354          if (!array_key_exists('filedetails', $options)) {
 355              $filedetails = resource_get_file_details($resource, $cm);
 356          } else {
 357              $filedetails = $options['filedetails'];
 358          }
 359          $size = '';
 360          $type = '';
 361          $date = '';
 362          $langstring = '';
 363          $infodisplayed = 0;
 364          if (!empty($options['showsize'])) {
 365              if (!empty($filedetails['size'])) {
 366                  $size = display_size($filedetails['size']);
 367                  $langstring .= 'size';
 368                  $infodisplayed += 1;
 369              }
 370          }
 371          if (!empty($options['showtype'])) {
 372              if (!empty($filedetails['type'])) {
 373                  $type = $filedetails['type'];
 374                  $langstring .= 'type';
 375                  $infodisplayed += 1;
 376              }
 377          }
 378          if (!empty($options['showdate']) && (!empty($filedetails['modifieddate']) || !empty($filedetails['uploadeddate']))) {
 379              if (!empty($filedetails['modifieddate'])) {
 380                  $date = get_string('modifieddate', 'mod_resource', userdate($filedetails['modifieddate'],
 381                      get_string('strftimedatetimeshort', 'langconfig')));
 382              } else if (!empty($filedetails['uploadeddate'])) {
 383                  $date = get_string('uploadeddate', 'mod_resource', userdate($filedetails['uploadeddate'],
 384                      get_string('strftimedatetimeshort', 'langconfig')));
 385              }
 386              $langstring .= 'date';
 387              $infodisplayed += 1;
 388          }
 389  
 390          if ($infodisplayed > 1) {
 391              $details = get_string("resourcedetails_{$langstring}", 'resource',
 392                      (object)array('size' => $size, 'type' => $type, 'date' => $date));
 393          } else {
 394              // Only one of size, type and date is set, so just append.
 395              $details = $size . $type . $date;
 396          }
 397      }
 398  
 399      return $details;
 400  }
 401  
 402  /**
 403   * Print resource introduction.
 404   * @param object $resource
 405   * @param object $cm
 406   * @param object $course
 407   * @param bool $ignoresettings print even if not specified in modedit
 408   * @return void
 409   */
 410  function resource_print_intro($resource, $cm, $course, $ignoresettings=false) {
 411      global $OUTPUT;
 412  
 413      $options = empty($resource->displayoptions) ? [] : (array) unserialize_array($resource->displayoptions);
 414  
 415      $extraintro = resource_get_optional_details($resource, $cm);
 416      if ($extraintro) {
 417          // Put a paragaph tag around the details
 418          $extraintro = html_writer::tag('p', $extraintro, array('class' => 'resourcedetails'));
 419      }
 420  
 421      if ($ignoresettings || !empty($options['printintro']) || $extraintro) {
 422          $gotintro = trim(strip_tags($resource->intro));
 423          if ($gotintro || $extraintro) {
 424              echo $OUTPUT->box_start('mod_introbox', 'resourceintro');
 425              if ($gotintro) {
 426                  echo format_module_intro('resource', $resource, $cm->id);
 427              }
 428              echo $extraintro;
 429              echo $OUTPUT->box_end();
 430          }
 431      }
 432  }
 433  
 434  /**
 435   * Print warning that instance not migrated yet.
 436   * @param object $resource
 437   * @param object $cm
 438   * @param object $course
 439   * @return void, does not return
 440   */
 441  function resource_print_tobemigrated($resource, $cm, $course) {
 442      global $DB, $OUTPUT;
 443  
 444      $resource_old = $DB->get_record('resource_old', array('oldid'=>$resource->id));
 445      resource_print_header($resource, $cm, $course);
 446      resource_print_heading($resource, $cm, $course);
 447      resource_print_intro($resource, $cm, $course);
 448      echo $OUTPUT->notification(get_string('notmigrated', 'resource', $resource_old->type));
 449      echo $OUTPUT->footer();
 450      die;
 451  }
 452  
 453  /**
 454   * Print warning that file can not be found.
 455   * @param object $resource
 456   * @param object $cm
 457   * @param object $course
 458   * @return void, does not return
 459   */
 460  function resource_print_filenotfound($resource, $cm, $course) {
 461      global $DB, $OUTPUT;
 462  
 463      $resource_old = $DB->get_record('resource_old', array('oldid'=>$resource->id));
 464      resource_print_header($resource, $cm, $course);
 465      resource_print_heading($resource, $cm, $course);
 466      resource_print_intro($resource, $cm, $course);
 467      if ($resource_old) {
 468          echo $OUTPUT->notification(get_string('notmigrated', 'resource', $resource_old->type));
 469      } else {
 470          echo $OUTPUT->notification(get_string('filenotfound', 'resource'));
 471      }
 472      echo $OUTPUT->footer();
 473      die;
 474  }
 475  
 476  /**
 477   * Decide the best display format.
 478   * @param object $resource
 479   * @return int display type constant
 480   */
 481  function resource_get_final_display_type($resource) {
 482      global $CFG, $PAGE;
 483  
 484      if ($resource->display != RESOURCELIB_DISPLAY_AUTO) {
 485          return $resource->display;
 486      }
 487  
 488      if (empty($resource->mainfile)) {
 489          return RESOURCELIB_DISPLAY_DOWNLOAD;
 490      } else {
 491          $mimetype = mimeinfo('type', $resource->mainfile);
 492      }
 493  
 494      if (file_mimetype_in_typegroup($mimetype, 'archive')) {
 495          return RESOURCELIB_DISPLAY_DOWNLOAD;
 496      }
 497      if (file_mimetype_in_typegroup($mimetype, array('web_image', '.htm', 'web_video', 'web_audio'))) {
 498          return RESOURCELIB_DISPLAY_EMBED;
 499      }
 500  
 501      // let the browser deal with it somehow
 502      return RESOURCELIB_DISPLAY_OPEN;
 503  }
 504  
 505  /**
 506   * File browsing support class
 507   */
 508  class resource_content_file_info extends file_info_stored {
 509      public function get_parent() {
 510          if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
 511              return $this->browser->get_file_info($this->context);
 512          }
 513          return parent::get_parent();
 514      }
 515      public function get_visible_name() {
 516          if ($this->lf->get_filepath() === '/' and $this->lf->get_filename() === '.') {
 517              return $this->topvisiblename;
 518          }
 519          return parent::get_visible_name();
 520      }
 521  }
 522  
 523  function resource_set_mainfile($data) {
 524      global $DB;
 525      $fs = get_file_storage();
 526      $cmid = $data->coursemodule;
 527      $draftitemid = $data->files;
 528  
 529      $context = context_module::instance($cmid);
 530      if ($draftitemid) {
 531          $options = array('subdirs' => true, 'embed' => false);
 532          if ($data->display == RESOURCELIB_DISPLAY_EMBED) {
 533              $options['embed'] = true;
 534          }
 535          file_save_draft_area_files($draftitemid, $context->id, 'mod_resource', 'content', 0, $options);
 536      }
 537      $files = $fs->get_area_files($context->id, 'mod_resource', 'content', 0, 'sortorder', false);
 538      if (count($files) == 1) {
 539          // only one file attached, set it as main file automatically
 540          $file = reset($files);
 541          file_set_sortorder($context->id, 'mod_resource', 'content', 0, $file->get_filepath(), $file->get_filename(), 1);
 542      }
 543  }