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See Release Notes

  • Bug fixes for general core bugs in 4.0.x will end 8 May 2023 (12 months).
  • Bug fixes for security issues in 4.0.x will end 13 November 2023 (18 months).
  • PHP version: minimum PHP 7.3.0 Note: the minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is also supported.

Differences Between: [Versions 310 and 400] [Versions 311 and 400] [Versions 39 and 400] [Versions 400 and 401] [Versions 400 and 402] [Versions 400 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   * Library of functions and constants for module glossary
  20   * outside of what is required for the core moodle api
  21   *
  22   * @package   mod_glossary
  23   * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
  24   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  require_once($CFG->libdir . '/portfolio/caller.php');
  28  require_once($CFG->libdir . '/filelib.php');
  29  
  30  /**
  31   * class to handle exporting an entire glossary database
  32   */
  33  class glossary_full_portfolio_caller extends portfolio_module_caller_base {
  34  
  35      private $glossary;
  36      private $exportdata;
  37      private $keyedfiles = array(); // keyed on entry
  38  
  39      /**
  40       * return array of expected call back arguments
  41       * and whether they are required or not
  42       *
  43       * @return array
  44       */
  45      public static function expected_callbackargs() {
  46          return array(
  47              'id' => true,
  48          );
  49      }
  50  
  51      /**
  52       * load up all data required for this export.
  53       *
  54       * @return void
  55       */
  56      public function load_data() {
  57          global $DB;
  58          if (!$this->cm = get_coursemodule_from_id('glossary', $this->id)) {
  59              throw new portfolio_caller_exception('invalidid', 'glossary');
  60          }
  61          if (!$this->glossary = $DB->get_record('glossary', array('id' => $this->cm->instance))) {
  62              throw new portfolio_caller_exception('invalidid', 'glossary');
  63          }
  64          $entries = $DB->get_records('glossary_entries', array('glossaryid' => $this->glossary->id));
  65          list($where, $params) = $DB->get_in_or_equal(array_keys($entries));
  66  
  67          $aliases = $DB->get_records_select('glossary_alias', 'entryid ' . $where, $params);
  68          $categoryentries = $DB->get_records_sql('SELECT ec.entryid, c.name FROM {glossary_entries_categories} ec
  69              JOIN {glossary_categories} c
  70              ON c.id = ec.categoryid
  71              WHERE ec.entryid ' . $where, $params);
  72  
  73          $this->exportdata = array('entries' => $entries, 'aliases' => $aliases, 'categoryentries' => $categoryentries);
  74          $fs = get_file_storage();
  75          $context = context_module::instance($this->cm->id);
  76          $this->multifiles = array();
  77          foreach (array_keys($entries) as $entry) {
  78              $this->keyedfiles[$entry] = array_merge(
  79                  $fs->get_area_files($context->id, 'mod_glossary', 'attachment', $entry, "timemodified", false),
  80                  $fs->get_area_files($context->id, 'mod_glossary', 'entry', $entry, "timemodified", false)
  81              );
  82              $this->multifiles = array_merge($this->multifiles, $this->keyedfiles[$entry]);
  83          }
  84      }
  85  
  86      /**
  87       * how long might we expect this export to take
  88       *
  89       * @return constant one of PORTFOLIO_TIME_XX
  90       */
  91      public function expected_time() {
  92          $filetime = portfolio_expected_time_file($this->multifiles);
  93          $dbtime   = portfolio_expected_time_db(count($this->exportdata['entries']));
  94          return ($filetime > $dbtime) ? $filetime : $dbtime;
  95      }
  96  
  97      /**
  98       * return the sha1 of this content
  99       *
 100       * @return string
 101       */
 102      public function get_sha1() {
 103          $file = '';
 104          if ($this->multifiles) {
 105              $file = $this->get_sha1_file();
 106          }
 107          return sha1(serialize($this->exportdata) . $file);
 108      }
 109  
 110      /**
 111       * prepare the package ready to be passed off to the portfolio plugin
 112       *
 113       * @return void
 114       */
 115      public function prepare_package() {
 116          $entries = $this->exportdata['entries'];
 117          $aliases = array();
 118          $categories = array();
 119          if (is_array($this->exportdata['aliases'])) {
 120              foreach ($this->exportdata['aliases'] as $alias) {
 121                  if (!array_key_exists($alias->entryid, $aliases)) {
 122                      $aliases[$alias->entryid] = array();
 123                  }
 124                  $aliases[$alias->entryid][] = $alias->alias;
 125              }
 126          }
 127          if (is_array($this->exportdata['categoryentries'])) {
 128              foreach ($this->exportdata['categoryentries'] as $cat) {
 129                  if (!array_key_exists($cat->entryid, $categories)) {
 130                      $categories[$cat->entryid] = array();
 131                  }
 132                  $categories[$cat->entryid][] = $cat->name;
 133              }
 134          }
 135          if ($this->get('exporter')->get('formatclass') == PORTFOLIO_FORMAT_SPREADSHEET) {
 136              $csv = glossary_generate_export_csv($entries, $aliases, $categories);
 137              $this->exporter->write_new_file($csv, clean_filename($this->cm->name) . '.csv', false);
 138              return;
 139          } else if ($this->get('exporter')->get('formatclass') == PORTFOLIO_FORMAT_LEAP2A) {
 140              $ids = array(); // keep track of these to make into a selection later
 141              global $USER, $DB;
 142              $writer = $this->get('exporter')->get('format')->leap2a_writer($USER);
 143              $format = $this->exporter->get('format');
 144              $filename = $this->get('exporter')->get('format')->manifest_name();
 145              foreach ($entries as $e) {
 146                  $content = glossary_entry_portfolio_caller::entry_content(
 147                      $this->course,
 148                      $this->cm,
 149                      $this->glossary,
 150                      $e,
 151                      (array_key_exists($e->id, $aliases) ? $aliases[$e->id] : array()),
 152                      $format
 153                  );
 154                  $entry = new portfolio_format_leap2a_entry('glossaryentry' . $e->id, $e->concept, 'entry', $content);
 155                  $entry->author    = $DB->get_record('user', array('id' => $e->userid), 'id,firstname,lastname,email');
 156                  $entry->published = $e->timecreated;
 157                  $entry->updated   = $e->timemodified;
 158                  if (!empty($this->keyedfiles[$e->id])) {
 159                      $writer->link_files($entry, $this->keyedfiles[$e->id], 'glossaryentry' . $e->id . 'file');
 160                      foreach ($this->keyedfiles[$e->id] as $file) {
 161                          $this->exporter->copy_existing_file($file);
 162                      }
 163                  }
 164                  if (!empty($categories[$e->id])) {
 165                      foreach ($categories[$e->id] as $cat) {
 166                          // this essentially treats them as plain tags
 167                          // leap has the idea of category schemes
 168                          // but I think this is overkill here
 169                          $entry->add_category($cat);
 170                      }
 171                  }
 172                  $writer->add_entry($entry);
 173                  $ids[] = $entry->id;
 174              }
 175              $selection = new portfolio_format_leap2a_entry('wholeglossary' . $this->glossary->id, get_string('modulename', 'glossary'), 'selection');
 176              $writer->add_entry($selection);
 177              $writer->make_selection($selection, $ids, 'Grouping');
 178              $content = $writer->to_xml();
 179          }
 180          $this->exporter->write_new_file($content, $filename, true);
 181      }
 182  
 183      /**
 184       * make sure that the current user is allowed to do this
 185       *
 186       * @return boolean
 187       */
 188      public function check_permissions() {
 189          return has_capability('mod/glossary:export', context_module::instance($this->cm->id));
 190      }
 191  
 192      /**
 193       * return a nice name to be displayed about this export location
 194       *
 195       * @return string
 196       */
 197      public static function display_name() {
 198          return get_string('modulename', 'glossary');
 199      }
 200  
 201      /**
 202       * what formats this function *generally* supports
 203       *
 204       * @return array
 205       */
 206      public static function base_supported_formats() {
 207          return array(PORTFOLIO_FORMAT_SPREADSHEET, PORTFOLIO_FORMAT_LEAP2A);
 208      }
 209  }
 210  
 211  /**
 212   * class to export a single glossary entry
 213   *
 214   * @package   mod_glossary
 215   * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
 216   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 217   */
 218  class glossary_entry_portfolio_caller extends portfolio_module_caller_base {
 219  
 220      private $glossary;
 221      private $entry;
 222      protected $entryid;
 223  
 224      /** @var array Array that contains all aliases for the given glossary entry. */
 225      private $aliases = [];
 226  
 227      /*
 228       * @return array
 229       */
 230      public static function expected_callbackargs() {
 231          return array(
 232              'entryid' => true,
 233              'id'      => true,
 234          );
 235      }
 236  
 237      /**
 238       * load up all data required for this export.
 239       *
 240       * @return void
 241       */
 242      public function load_data() {
 243          global $DB;
 244          if (!$this->cm = get_coursemodule_from_id('glossary', $this->id)) {
 245              throw new portfolio_caller_exception('invalidid', 'glossary');
 246          }
 247          if (!$this->glossary = $DB->get_record('glossary', array('id' => $this->cm->instance))) {
 248              throw new portfolio_caller_exception('invalidid', 'glossary');
 249          }
 250          if ($this->entryid) {
 251              if (!$this->entry = $DB->get_record('glossary_entries', array('id' => $this->entryid))) {
 252                  throw new portfolio_caller_exception('noentry', 'glossary');
 253              }
 254              // in case we don't have USER this will make the entry be printed
 255              $this->entry->approved = true;
 256          }
 257          $this->categories = $DB->get_records_sql('SELECT ec.entryid, c.name FROM {glossary_entries_categories} ec
 258              JOIN {glossary_categories} c
 259              ON c.id = ec.categoryid
 260              WHERE ec.entryid = ?', array($this->entryid));
 261          $context = context_module::instance($this->cm->id);
 262          if ($this->entry->sourceglossaryid == $this->cm->instance) {
 263              if ($maincm = get_coursemodule_from_instance('glossary', $this->entry->glossaryid)) {
 264                  $context = context_module::instance($maincm->id);
 265              }
 266          }
 267          $this->aliases = $DB->get_records('glossary_alias', ['entryid' => $this->entryid]);
 268          $fs = get_file_storage();
 269          $this->multifiles = array_merge(
 270              $fs->get_area_files($context->id, 'mod_glossary', 'attachment', $this->entry->id, "timemodified", false),
 271              $fs->get_area_files($context->id, 'mod_glossary', 'entry', $this->entry->id, "timemodified", false)
 272          );
 273  
 274          if (!empty($this->multifiles)) {
 275              $this->add_format(PORTFOLIO_FORMAT_RICHHTML);
 276          } else {
 277              $this->add_format(PORTFOLIO_FORMAT_PLAINHTML);
 278          }
 279      }
 280  
 281      /**
 282       * how long might we expect this export to take
 283       *
 284       * @return constant one of PORTFOLIO_TIME_XX
 285       */
 286      public function expected_time() {
 287          return PORTFOLIO_TIME_LOW;
 288      }
 289  
 290      /**
 291       * make sure that the current user is allowed to do this
 292       *
 293       * @return boolean
 294       */
 295      public function check_permissions() {
 296          $context = context_module::instance($this->cm->id);
 297          return has_capability('mod/glossary:exportentry', $context)
 298              || ($this->entry->userid == $this->user->id && has_capability('mod/glossary:exportownentry', $context));
 299      }
 300  
 301      /**
 302       * return a nice name to be displayed about this export location
 303       *
 304       * @return string
 305       */
 306      public static function display_name() {
 307          return get_string('modulename', 'glossary');
 308      }
 309  
 310      /**
 311       * prepare the package ready to be passed off to the portfolio plugin
 312       *
 313       * @return void
 314       */
 315      public function prepare_package() {
 316          global $DB;
 317  
 318          $format = $this->exporter->get('format');
 319          $content = self::entry_content($this->course, $this->cm, $this->glossary, $this->entry, $this->aliases, $format);
 320  
 321          if ($this->exporter->get('formatclass') === PORTFOLIO_FORMAT_PLAINHTML) {
 322              $filename = clean_filename($this->entry->concept) . '.html';
 323              $this->exporter->write_new_file($content, $filename);
 324  
 325          } else if ($this->exporter->get('formatclass') === PORTFOLIO_FORMAT_RICHHTML) {
 326              if ($this->multifiles) {
 327                  foreach ($this->multifiles as $file) {
 328                      $this->exporter->copy_existing_file($file);
 329                  }
 330              }
 331              $filename = clean_filename($this->entry->concept) . '.html';
 332              $this->exporter->write_new_file($content, $filename);
 333  
 334          } else if ($this->exporter->get('formatclass') === PORTFOLIO_FORMAT_LEAP2A) {
 335              $writer = $this->get('exporter')->get('format')->leap2a_writer();
 336              $entry = new portfolio_format_leap2a_entry('glossaryentry' . $this->entry->id, $this->entry->concept, 'entry', $content);
 337              $entry->author = $DB->get_record('user', array('id' => $this->entry->userid), 'id,firstname,lastname,email');
 338              $entry->published = $this->entry->timecreated;
 339              $entry->updated = $this->entry->timemodified;
 340              if ($this->multifiles) {
 341                  $writer->link_files($entry, $this->multifiles);
 342                  foreach ($this->multifiles as $file) {
 343                      $this->exporter->copy_existing_file($file);
 344                  }
 345              }
 346              if ($this->categories) {
 347                  foreach ($this->categories as $cat) {
 348                      // this essentially treats them as plain tags
 349                      // leap has the idea of category schemes
 350                      // but I think this is overkill here
 351                      $entry->add_category($cat->name);
 352                  }
 353              }
 354              $writer->add_entry($entry);
 355              $content = $writer->to_xml();
 356              $filename = $this->get('exporter')->get('format')->manifest_name();
 357              $this->exporter->write_new_file($content, $filename);
 358  
 359          } else {
 360              throw new portfolio_caller_exception('unexpected_format_class', 'glossary');
 361          }
 362      }
 363  
 364      /**
 365       * return the sha1 of this content
 366       *
 367       * @return string
 368       */
 369      public function get_sha1() {
 370          if ($this->multifiles) {
 371              return sha1(serialize($this->entry) . $this->get_sha1_file());
 372          }
 373          return sha1(serialize($this->entry));
 374      }
 375  
 376      /**
 377       * what formats this function *generally* supports
 378       *
 379       * @return array
 380       */
 381      public static function base_supported_formats() {
 382          return array(PORTFOLIO_FORMAT_RICHHTML, PORTFOLIO_FORMAT_PLAINHTML, PORTFOLIO_FORMAT_LEAP2A);
 383      }
 384  
 385      /**
 386       * helper function to get the html content of an entry
 387       * for both this class and the full glossary exporter
 388       * this is a very simplified version of the dictionary format output,
 389       * but with its 500 levels of indirection removed
 390       * and file rewriting handled by the portfolio export format.
 391       *
 392       * @param stdclass $course
 393       * @param stdclass $cm
 394       * @param stdclass $glossary
 395       * @param stdclass $entry
 396       *
 397       * @return string
 398       */
 399      public static function entry_content($course, $cm, $glossary, $entry, $aliases, $format) {
 400          global $OUTPUT, $DB;
 401          $entry = clone $entry;
 402          $context = context_module::instance($cm->id);
 403          $options = portfolio_format_text_options();
 404          $options->trusted = $entry->definitiontrust;
 405          $options->context = $context;
 406  
 407          $output = '<table class="glossarypost dictionary" cellspacing="0">' . "\n";
 408          $output .= '<tr valign="top">' . "\n";
 409          $output .= '<td class="entry">' . "\n";
 410  
 411          $output .= '<div class="concept">';
 412          $output .= format_text($OUTPUT->heading($entry->concept, 3), FORMAT_MOODLE, $options);
 413          $output .= '</div> ' . "\n";
 414  
 415          $entry->definition = format_text($entry->definition, $entry->definitionformat, $options);
 416          $output .= portfolio_rewrite_pluginfile_urls($entry->definition, $context->id, 'mod_glossary', 'entry', $entry->id, $format);
 417  
 418          if (isset($entry->footer)) {
 419              $output .= $entry->footer;
 420          }
 421  
 422          $output .= '</td></tr>' . "\n";
 423  
 424          if (!empty($aliases)) {
 425              $output .= '<tr valign="top"><td class="entrylowersection">';
 426              $key = (count($aliases) == 1) ? 'alias' : 'aliases';
 427              $output .= get_string($key, 'glossary') . ': ';
 428              foreach ($aliases as $alias) {
 429                  $output .= s($alias->alias) . ',';
 430              }
 431              $output = substr($output, 0, -1);
 432              $output .= '</td></tr>' . "\n";
 433          }
 434  
 435          if ($entry->sourceglossaryid == $cm->instance) {
 436              if (!$maincm = get_coursemodule_from_instance('glossary', $entry->glossaryid)) {
 437                  return '';
 438              }
 439              $filecontext = context_module::instance($maincm->id);
 440  
 441          } else {
 442              $filecontext = $context;
 443          }
 444          $fs = get_file_storage();
 445          if ($files = $fs->get_area_files($filecontext->id, 'mod_glossary', 'attachment', $entry->id, "timemodified", false)) {
 446              $output .= '<table border="0" width="100%"><tr><td>' . "\n";
 447  
 448              foreach ($files as $file) {
 449                  $output .= $format->file_output($file);
 450              }
 451              $output .= '</td></tr></table>' . "\n";
 452          }
 453  
 454          $output .= '</table>' . "\n";
 455  
 456          return $output;
 457      }
 458  }
 459  
 460  
 461  /**
 462   * Class representing the virtual node with all itemids in the file browser
 463   *
 464   * @category  files
 465   * @copyright 2012 David Mudrak <david@moodle.com>
 466   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 467   */
 468  class glossary_file_info_container extends file_info {
 469      /** @var file_browser */
 470      protected $browser;
 471      /** @var stdClass */
 472      protected $course;
 473      /** @var stdClass */
 474      protected $cm;
 475      /** @var string */
 476      protected $component;
 477      /** @var stdClass */
 478      protected $context;
 479      /** @var array */
 480      protected $areas;
 481      /** @var string */
 482      protected $filearea;
 483  
 484      /**
 485       * Constructor (in case you did not realize it ;-)
 486       *
 487       * @param file_browser $browser
 488       * @param stdClass $course
 489       * @param stdClass $cm
 490       * @param stdClass $context
 491       * @param array $areas
 492       * @param string $filearea
 493       */
 494      public function __construct($browser, $course, $cm, $context, $areas, $filearea) {
 495          parent::__construct($browser, $context);
 496          $this->browser = $browser;
 497          $this->course = $course;
 498          $this->cm = $cm;
 499          $this->component = 'mod_glossary';
 500          $this->context = $context;
 501          $this->areas = $areas;
 502          $this->filearea = $filearea;
 503      }
 504  
 505      /**
 506       * @return array with keys contextid, filearea, itemid, filepath and filename
 507       */
 508      public function get_params() {
 509          return array(
 510              'contextid' => $this->context->id,
 511              'component' => $this->component,
 512              'filearea' => $this->filearea,
 513              'itemid' => null,
 514              'filepath' => null,
 515              'filename' => null,
 516          );
 517      }
 518  
 519      /**
 520       * Can new files or directories be added via the file browser
 521       *
 522       * @return bool
 523       */
 524      public function is_writable() {
 525          return false;
 526      }
 527  
 528      /**
 529       * Should this node be considered as a folder in the file browser
 530       *
 531       * @return bool
 532       */
 533      public function is_directory() {
 534          return true;
 535      }
 536  
 537      /**
 538       * Returns localised visible name of this node
 539       *
 540       * @return string
 541       */
 542      public function get_visible_name() {
 543          return $this->areas[$this->filearea];
 544      }
 545  
 546      /**
 547       * Returns list of children nodes
 548       *
 549       * @return array of file_info instances
 550       */
 551      public function get_children() {
 552          return $this->get_filtered_children('*', false, true);
 553      }
 554  
 555      /**
 556       * Help function to return files matching extensions or their count
 557       *
 558       * @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
 559       * @param bool|int $countonly if false returns the children, if an int returns just the
 560       *    count of children but stops counting when $countonly number of children is reached
 561       * @param bool $returnemptyfolders if true returns items that don't have matching files inside
 562       * @return array|int array of file_info instances or the count
 563       */
 564      private function get_filtered_children($extensions = '*', $countonly = false, $returnemptyfolders = false) {
 565          global $DB;
 566          $sql = 'SELECT DISTINCT f.itemid, ge.concept
 567                    FROM {files} f
 568                    JOIN {modules} m ON (m.name = :modulename AND m.visible = 1)
 569                    JOIN {course_modules} cm ON (cm.module = m.id AND cm.id = :instanceid)
 570                    JOIN {glossary} g ON g.id = cm.instance
 571                    JOIN {glossary_entries} ge ON (ge.glossaryid = g.id AND ge.id = f.itemid)
 572                   WHERE f.contextid = :contextid
 573                    AND f.component = :component
 574                    AND f.filearea = :filearea';
 575          $params = array(
 576              'modulename' => 'glossary',
 577              'instanceid' => $this->context->instanceid,
 578              'contextid' => $this->context->id,
 579              'component' => $this->component,
 580              'filearea' => $this->filearea);
 581          if (!$returnemptyfolders) {
 582              $sql .= ' AND f.filename <> :emptyfilename';
 583              $params['emptyfilename'] = '.';
 584          }
 585          list($sql2, $params2) = $this->build_search_files_sql($extensions, 'f');
 586          $sql .= ' '.$sql2;
 587          $params = array_merge($params, $params2);
 588          if ($countonly !== false) {
 589              $sql .= ' ORDER BY ge.concept, f.itemid';
 590          }
 591  
 592          $rs = $DB->get_recordset_sql($sql, $params);
 593          $children = array();
 594          foreach ($rs as $record) {
 595              if ($child = $this->browser->get_file_info($this->context, 'mod_glossary', $this->filearea, $record->itemid)) {
 596                  $children[] = $child;
 597              }
 598              if ($countonly !== false && count($children) >= $countonly) {
 599                  break;
 600              }
 601          }
 602          $rs->close();
 603          if ($countonly !== false) {
 604              return count($children);
 605          }
 606          return $children;
 607      }
 608  
 609      /**
 610       * Returns list of children which are either files matching the specified extensions
 611       * or folders that contain at least one such file.
 612       *
 613       * @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
 614       * @return array of file_info instances
 615       */
 616      public function get_non_empty_children($extensions = '*') {
 617          return $this->get_filtered_children($extensions, false);
 618      }
 619  
 620      /**
 621       * Returns the number of children which are either files matching the specified extensions
 622       * or folders containing at least one such file.
 623       *
 624       * @param string|array $extensions, for example '*' or array('.gif','.jpg')
 625       * @param int $limit stop counting after at least $limit non-empty children are found
 626       * @return int
 627       */
 628      public function count_non_empty_children($extensions = '*', $limit = 1) {
 629          return $this->get_filtered_children($extensions, $limit);
 630      }
 631  
 632      /**
 633       * Returns parent file_info instance
 634       *
 635       * @return file_info or null for root
 636       */
 637      public function get_parent() {
 638          return $this->browser->get_file_info($this->context);
 639      }
 640  }
 641  
 642  /**
 643   * Returns glossary entries tagged with a specified tag.
 644   *
 645   * This is a callback used by the tag area mod_glossary/glossary_entries to search for glossary entries
 646   * tagged with a specific tag.
 647   *
 648   * @param core_tag_tag $tag
 649   * @param bool $exclusivemode if set to true it means that no other entities tagged with this tag
 650   *             are displayed on the page and the per-page limit may be bigger
 651   * @param int $fromctx context id where the link was displayed, may be used by callbacks
 652   *            to display items in the same context first
 653   * @param int $ctx context id where to search for records
 654   * @param bool $rec search in subcontexts as well
 655   * @param int $page 0-based number of page being displayed
 656   * @return \core_tag\output\tagindex
 657   */
 658  function mod_glossary_get_tagged_entries($tag, $exclusivemode = false, $fromctx = 0, $ctx = 0, $rec = 1, $page = 0) {
 659      global $OUTPUT;
 660      $perpage = $exclusivemode ? 20 : 5;
 661  
 662      // Build the SQL query.
 663      $ctxselect = context_helper::get_preload_record_columns_sql('ctx');
 664      $query = "SELECT ge.id, ge.concept, ge.glossaryid, ge.approved, ge.userid,
 665                      cm.id AS cmid, c.id AS courseid, c.shortname, c.fullname, $ctxselect
 666                  FROM {glossary_entries} ge
 667                  JOIN {glossary} g ON g.id = ge.glossaryid
 668                  JOIN {modules} m ON m.name='glossary'
 669                  JOIN {course_modules} cm ON cm.module = m.id AND cm.instance = g.id
 670                  JOIN {tag_instance} tt ON ge.id = tt.itemid
 671                  JOIN {course} c ON cm.course = c.id
 672                  JOIN {context} ctx ON ctx.instanceid = cm.id AND ctx.contextlevel = :coursemodulecontextlevel
 673                 WHERE tt.itemtype = :itemtype AND tt.tagid = :tagid AND tt.component = :component
 674                   AND cm.deletioninprogress = 0
 675                   AND ge.id %ITEMFILTER% AND c.id %COURSEFILTER%";
 676  
 677      $params = array('itemtype' => 'glossary_entries', 'tagid' => $tag->id, 'component' => 'mod_glossary',
 678                      'coursemodulecontextlevel' => CONTEXT_MODULE);
 679  
 680      if ($ctx) {
 681          $context = $ctx ? context::instance_by_id($ctx) : context_system::instance();
 682          $query .= $rec ? ' AND (ctx.id = :contextid OR ctx.path LIKE :path)' : ' AND ctx.id = :contextid';
 683          $params['contextid'] = $context->id;
 684          $params['path'] = $context->path.'/%';
 685      }
 686  
 687      $query .= " ORDER BY ";
 688      if ($fromctx) {
 689          // In order-clause specify that modules from inside "fromctx" context should be returned first.
 690          $fromcontext = context::instance_by_id($fromctx);
 691          $query .= ' (CASE WHEN ctx.id = :fromcontextid OR ctx.path LIKE :frompath THEN 0 ELSE 1 END),';
 692          $params['fromcontextid'] = $fromcontext->id;
 693          $params['frompath'] = $fromcontext->path.'/%';
 694      }
 695      $query .= ' c.sortorder, cm.id, ge.id';
 696  
 697      $totalpages = $page + 1;
 698  
 699      // Use core_tag_index_builder to build and filter the list of items.
 700      $builder = new core_tag_index_builder('mod_glossary', 'glossary_entries', $query, $params, $page * $perpage, $perpage + 1);
 701      while ($item = $builder->has_item_that_needs_access_check()) {
 702          context_helper::preload_from_record($item);
 703          $courseid = $item->courseid;
 704          if (!$builder->can_access_course($courseid)) {
 705              $builder->set_accessible($item, false);
 706              continue;
 707          }
 708          $modinfo = get_fast_modinfo($builder->get_course($courseid));
 709          // Set accessibility of this item and all other items in the same course.
 710          $builder->walk(function ($taggeditem) use ($courseid, $modinfo, $builder) {
 711              global $USER;
 712              if ($taggeditem->courseid == $courseid) {
 713                  $accessible = false;
 714                  if (($cm = $modinfo->get_cm($taggeditem->cmid)) && $cm->uservisible) {
 715                      if ($taggeditem->approved) {
 716                          $accessible = true;
 717                      } else if ($taggeditem->userid == $USER->id) {
 718                          $accessible = true;
 719                      } else {
 720                          $accessible = has_capability('mod/glossary:approve', context_module::instance($cm->id));
 721                      }
 722                  }
 723                  $builder->set_accessible($taggeditem, $accessible);
 724              }
 725          });
 726      }
 727  
 728      $items = $builder->get_items();
 729      if (count($items) > $perpage) {
 730          $totalpages = $page + 2; // We don't need exact page count, just indicate that the next page exists.
 731          array_pop($items);
 732      }
 733  
 734      // Build the display contents.
 735      if ($items) {
 736          $tagfeed = new core_tag\output\tagfeed();
 737          foreach ($items as $item) {
 738              context_helper::preload_from_record($item);
 739              $modinfo = get_fast_modinfo($item->courseid);
 740              $cm = $modinfo->get_cm($item->cmid);
 741              $pageurl = new moodle_url('/mod/glossary/showentry.php', array('eid' => $item->id, 'displayformat' => 'dictionary'));
 742              $pagename = format_string($item->concept, true, array('context' => context_module::instance($item->cmid)));
 743              $pagename = html_writer::link($pageurl, $pagename);
 744              $courseurl = course_get_url($item->courseid, $cm->sectionnum);
 745              $cmname = html_writer::link($cm->url, $cm->get_formatted_name());
 746              $coursename = format_string($item->fullname, true, array('context' => context_course::instance($item->courseid)));
 747              $coursename = html_writer::link($courseurl, $coursename);
 748              $icon = html_writer::link($pageurl, html_writer::empty_tag('img', array('src' => $cm->get_icon_url())));
 749  
 750              $approved = "";
 751              if (!$item->approved) {
 752                  $approved = '<br>'. html_writer::span(get_string('entrynotapproved', 'mod_glossary'), 'badge badge-warning');
 753              }
 754              $tagfeed->add($icon, $pagename, $cmname.'<br>'.$coursename.$approved);
 755          }
 756  
 757          $content = $OUTPUT->render_from_template('core_tag/tagfeed',
 758              $tagfeed->export_for_template($OUTPUT));
 759  
 760          return new core_tag\output\tagindex($tag, 'mod_glossary', 'glossary_entries', $content,
 761              $exclusivemode, $fromctx, $ctx, $rec, $page, $totalpages);
 762      }
 763  }