mod/glossary/locallib.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  * 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      * @return array
 225      */
 226     public static function expected_callbackargs() {
 227         return array(
 228             'entryid' => true,
 229             'id'      => true,
 230         );
 231     }
 232
 233     /**
 234      * load up all data required for this export.
 235      *
 236      * @return void
 237      */
 238     public function load_data() {
 239         global $DB;
 240         if (!$this->cm = get_coursemodule_from_id('glossary', $this->id)) {
 241             throw new portfolio_caller_exception('invalidid', 'glossary');
 242         }
 243         if (!$this->glossary = $DB->get_record('glossary', array('id' => $this->cm->instance))) {
 244             throw new portfolio_caller_exception('invalidid', 'glossary');
 245         }
 246         if ($this->entryid) {
 247             if (!$this->entry = $DB->get_record('glossary_entries', array('id' => $this->entryid))) {
 248                 throw new portfolio_caller_exception('noentry', 'glossary');
 249             }
 250             // in case we don't have USER this will make the entry be printed
 251             $this->entry->approved = true;
 252         }
 253         $this->categories = $DB->get_records_sql('SELECT ec.entryid, c.name FROM {glossary_entries_categories} ec
 254             JOIN {glossary_categories} c
 255             ON c.id = ec.categoryid
 256             WHERE ec.entryid = ?', array($this->entryid));
 257         $context = context_module::instance($this->cm->id);
 258         if ($this->entry->sourceglossaryid == $this->cm->instance) {
 259             if ($maincm = get_coursemodule_from_instance('glossary', $this->entry->glossaryid)) {
 260                 $context = context_module::instance($maincm->id);
 261             }
 262         }
 263         $this->aliases = $DB->get_record('glossary_alias', array('entryid'=>$this->entryid));
 264         $fs = get_file_storage();
 265         $this->multifiles = array_merge(
 266             $fs->get_area_files($context->id, 'mod_glossary', 'attachment', $this->entry->id, "timemodified", false),
 267             $fs->get_area_files($context->id, 'mod_glossary', 'entry', $this->entry->id, "timemodified", false)
 268         );
 269
 270         if (!empty($this->multifiles)) {
 271             $this->add_format(PORTFOLIO_FORMAT_RICHHTML);
 272         } else {
 273             $this->add_format(PORTFOLIO_FORMAT_PLAINHTML);
 274         }
 275     }
 276
 277     /**
 278      * how long might we expect this export to take
 279      *
 280      * @return constant one of PORTFOLIO_TIME_XX
 281      */
 282     public function expected_time() {
 283         return PORTFOLIO_TIME_LOW;
 284     }
 285
 286     /**
 287      * make sure that the current user is allowed to do this
 288      *
 289      * @return boolean
 290      */
 291     public function check_permissions() {
 292         $context = context_module::instance($this->cm->id);
 293         return has_capability('mod/glossary:exportentry', $context)
 294             || ($this->entry->userid == $this->user->id && has_capability('mod/glossary:exportownentry', $context));
 295     }
 296
 297     /**
 298      * return a nice name to be displayed about this export location
 299      *
 300      * @return string
 301      */
 302     public static function display_name() {
 303         return get_string('modulename', 'glossary');
 304     }
 305
 306     /**
 307      * prepare the package ready to be passed off to the portfolio plugin
 308      *
 309      * @return void
 310      */
 311     public function prepare_package() {
 312         global $DB;
 313
 314         $format = $this->exporter->get('format');
 315         $content = self::entry_content($this->course, $this->cm, $this->glossary, $this->entry, $this->aliases, $format);
 316
 317         if ($this->exporter->get('formatclass') === PORTFOLIO_FORMAT_PLAINHTML) {
 318             $filename = clean_filename($this->entry->concept) . '.html';
 319             $this->exporter->write_new_file($content, $filename);
 320
 321         } else if ($this->exporter->get('formatclass') === PORTFOLIO_FORMAT_RICHHTML) {
 322             if ($this->multifiles) {
 323                 foreach ($this->multifiles as $file) {
 324                     $this->exporter->copy_existing_file($file);
 325                 }
 326             }
 327             $filename = clean_filename($this->entry->concept) . '.html';
 328             $this->exporter->write_new_file($content, $filename);
 329
 330         } else if ($this->exporter->get('formatclass') === PORTFOLIO_FORMAT_LEAP2A) {
 331             $writer = $this->get('exporter')->get('format')->leap2a_writer();
 332             $entry = new portfolio_format_leap2a_entry('glossaryentry' . $this->entry->id, $this->entry->concept, 'entry', $content);
 333             $entry->author = $DB->get_record('user', array('id' => $this->entry->userid), 'id,firstname,lastname,email');
 334             $entry->published = $this->entry->timecreated;
 335             $entry->updated = $this->entry->timemodified;
 336             if ($this->multifiles) {
 337                 $writer->link_files($entry, $this->multifiles);
 338                 foreach ($this->multifiles as $file) {
 339                     $this->exporter->copy_existing_file($file);
 340                 }
 341             }
 342             if ($this->categories) {
 343                 foreach ($this->categories as $cat) {
 344                     // this essentially treats them as plain tags
 345                     // leap has the idea of category schemes
 346                     // but I think this is overkill here
 347                     $entry->add_category($cat->name);
 348                 }
 349             }
 350             $writer->add_entry($entry);
 351             $content = $writer->to_xml();
 352             $filename = $this->get('exporter')->get('format')->manifest_name();
 353             $this->exporter->write_new_file($content, $filename);
 354
 355         } else {
 356             throw new portfolio_caller_exception('unexpected_format_class', 'glossary');
 357         }
 358     }
 359
 360     /**
 361      * return the sha1 of this content
 362      *
 363      * @return string
 364      */
 365     public function get_sha1() {
 366         if ($this->multifiles) {
 367             return sha1(serialize($this->entry) . $this->get_sha1_file());
 368         }
 369         return sha1(serialize($this->entry));
 370     }
 371
 372     /**
 373      * what formats this function *generally* supports
 374      *
 375      * @return array
 376      */
 377     public static function base_supported_formats() {
 378         return array(PORTFOLIO_FORMAT_RICHHTML, PORTFOLIO_FORMAT_PLAINHTML, PORTFOLIO_FORMAT_LEAP2A);
 379     }
 380
 381     /**
 382      * helper function to get the html content of an entry
 383      * for both this class and the full glossary exporter
 384      * this is a very simplified version of the dictionary format output,
 385      * but with its 500 levels of indirection removed
 386      * and file rewriting handled by the portfolio export format.
 387      *
 388      * @param stdclass $course
 389      * @param stdclass $cm
 390      * @param stdclass $glossary
 391      * @param stdclass $entry
 392      *
 393      * @return string
 394      */
 395     public static function entry_content($course, $cm, $glossary, $entry, $aliases, $format) {
 396         global $OUTPUT, $DB;
 397         $entry = clone $entry;
 398         $context = context_module::instance($cm->id);
 399         $options = portfolio_format_text_options();
 400         $options->trusted = $entry->definitiontrust;
 401         $options->context = $context;
 402
 403         $output = '<table class="glossarypost dictionary" cellspacing="0">' . "\n";
 404         $output .= '<tr valign="top">' . "\n";
 405         $output .= '<td class="entry">' . "\n";
 406
 407         $output .= '<div class="concept">';
 408         $output .= format_text($OUTPUT->heading($entry->concept, 3), FORMAT_MOODLE, $options);
 409         $output .= '</div> ' . "\n";
 410
 411         $entry->definition = format_text($entry->definition, $entry->definitionformat, $options);
 412         $output .= portfolio_rewrite_pluginfile_urls($entry->definition, $context->id, 'mod_glossary', 'entry', $entry->id, $format);
 413
 414         if (isset($entry->footer)) {
 415             $output .= $entry->footer;
 416         }
 417
 418         $output .= '</td></tr>' . "\n";
 419
 420         if (!empty($aliases)) {
 421             $aliases = explode(',', $aliases->alias);
 422             $output .= '<tr valign="top"><td class="entrylowersection">';
 423             $key = (count($aliases) == 1) ? 'alias' : 'aliases';
 424             $output .= get_string($key, 'glossary') . ': ';
 425             foreach ($aliases as $alias) {
 426                 $output .= s($alias) . ',';
 427             }
 428             $output = substr($output, 0, -1);
 429             $output .= '</td></tr>' . "\n";
 430         }
 431
 432         if ($entry->sourceglossaryid == $cm->instance) {
 433             if (!$maincm = get_coursemodule_from_instance('glossary', $entry->glossaryid)) {
 434                 return '';
 435             }
 436             $filecontext = context_module::instance($maincm->id);
 437
 438         } else {
 439             $filecontext = $context;
 440         }
 441         $fs = get_file_storage();
 442         if ($files = $fs->get_area_files($filecontext->id, 'mod_glossary', 'attachment', $entry->id, "timemodified", false)) {
 443             $output .= '<table border="0" width="100%"><tr><td>' . "\n";
 444
 445             foreach ($files as $file) {
 446                 $output .= $format->file_output($file);
 447             }
 448             $output .= '</td></tr></table>' . "\n";
 449         }
 450
 451         $output .= '</table>' . "\n";
 452
 453         return $output;
 454     }
 455 }
 456
 457
 458 /**
 459  * Class representing the virtual node with all itemids in the file browser
 460  *
 461  * @category  files
 462  * @copyright 2012 David Mudrak <david@moodle.com>
 463  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 464  */
 465 class glossary_file_info_container extends file_info {
 466     /** @var file_browser */
 467     protected $browser;
 468     /** @var stdClass */
 469     protected $course;
 470     /** @var stdClass */
 471     protected $cm;
 472     /** @var string */
 473     protected $component;
 474     /** @var stdClass */
 475     protected $context;
 476     /** @var array */
 477     protected $areas;
 478     /** @var string */
 479     protected $filearea;
 480
 481     /**
 482      * Constructor (in case you did not realize it ;-)
 483      *
 484      * @param file_browser $browser
 485      * @param stdClass $course
 486      * @param stdClass $cm
 487      * @param stdClass $context
 488      * @param array $areas
 489      * @param string $filearea
 490      */
 491     public function __construct($browser, $course, $cm, $context, $areas, $filearea) {
 492         parent::__construct($browser, $context);
 493         $this->browser = $browser;
 494         $this->course = $course;
 495         $this->cm = $cm;
 496         $this->component = 'mod_glossary';
 497         $this->context = $context;
 498         $this->areas = $areas;
 499         $this->filearea = $filearea;
 500     }
 501
 502     /**
 503      * @return array with keys contextid, filearea, itemid, filepath and filename
 504      */
 505     public function get_params() {
 506         return array(
 507             'contextid' => $this->context->id,
 508             'component' => $this->component,
 509             'filearea' => $this->filearea,
 510             'itemid' => null,
 511             'filepath' => null,
 512             'filename' => null,
 513         );
 514     }
 515
 516     /**
 517      * Can new files or directories be added via the file browser
 518      *
 519      * @return bool
 520      */
 521     public function is_writable() {
 522         return false;
 523     }
 524
 525     /**
 526      * Should this node be considered as a folder in the file browser
 527      *
 528      * @return bool
 529      */
 530     public function is_directory() {
 531         return true;
 532     }
 533
 534     /**
 535      * Returns localised visible name of this node
 536      *
 537      * @return string
 538      */
 539     public function get_visible_name() {
 540         return $this->areas[$this->filearea];
 541     }
 542
 543     /**
 544      * Returns list of children nodes
 545      *
 546      * @return array of file_info instances
 547      */
 548     public function get_children() {
 549         return $this->get_filtered_children('*', false, true);
 550     }
 551
 552     /**
 553      * Help function to return files matching extensions or their count
 554      *
 555      * @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
 556      * @param bool|int $countonly if false returns the children, if an int returns just the
 557      *    count of children but stops counting when $countonly number of children is reached
 558      * @param bool $returnemptyfolders if true returns items that don't have matching files inside
 559      * @return array|int array of file_info instances or the count
 560      */
 561     private function get_filtered_children($extensions = '*', $countonly = false, $returnemptyfolders = false) {
 562         global $DB;
 563         $sql = 'SELECT DISTINCT f.itemid, ge.concept
 564                   FROM {files} f
 565                   JOIN {modules} m ON (m.name = :modulename AND m.visible = 1)
 566                   JOIN {course_modules} cm ON (cm.module = m.id AND cm.id = :instanceid)
 567                   JOIN {glossary} g ON g.id = cm.instance
 568                   JOIN {glossary_entries} ge ON (ge.glossaryid = g.id AND ge.id = f.itemid)
 569                  WHERE f.contextid = :contextid
 570                   AND f.component = :component
 571                   AND f.filearea = :filearea';
 572         $params = array(
 573             'modulename' => 'glossary',
 574             'instanceid' => $this->context->instanceid,
 575             'contextid' => $this->context->id,
 576             'component' => $this->component,
 577             'filearea' => $this->filearea);
 578         if (!$returnemptyfolders) {
 579             $sql .= ' AND f.filename <> :emptyfilename';
 580             $params['emptyfilename'] = '.';
 581         }
 582         list($sql2, $params2) = $this->build_search_files_sql($extensions, 'f');
 583         $sql .= ' '.$sql2;
 584         $params = array_merge($params, $params2);
 585         if ($countonly !== false) {
 586             $sql .= ' ORDER BY ge.concept, f.itemid';
 587         }
 588
 589         $rs = $DB->get_recordset_sql($sql, $params);
 590         $children = array();
 591         foreach ($rs as $record) {
 592             if ($child = $this->browser->get_file_info($this->context, 'mod_glossary', $this->filearea, $record->itemid)) {
 593                 $children[] = $child;
 594             }
 595             if ($countonly !== false && count($children) >= $countonly) {
 596                 break;
 597             }
 598         }
 599         $rs->close();
 600         if ($countonly !== false) {
 601             return count($children);
 602         }
 603         return $children;
 604     }
 605
 606     /**
 607      * Returns list of children which are either files matching the specified extensions
 608      * or folders that contain at least one such file.
 609      *
 610      * @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
 611      * @return array of file_info instances
 612      */
 613     public function get_non_empty_children($extensions = '*') {
 614         return $this->get_filtered_children($extensions, false);
 615     }
 616
 617     /**
 618      * Returns the number of children which are either files matching the specified extensions
 619      * or folders containing at least one such file.
 620      *
 621      * @param string|array $extensions, for example '*' or array('.gif','.jpg')
 622      * @param int $limit stop counting after at least $limit non-empty children are found
 623      * @return int
 624      */
 625     public function count_non_empty_children($extensions = '*', $limit = 1) {
 626         return $this->get_filtered_children($extensions, $limit);
 627     }
 628
 629     /**
 630      * Returns parent file_info instance
 631      *
 632      * @return file_info or null for root
 633      */
 634     public function get_parent() {
 635         return $this->browser->get_file_info($this->context);
 636     }
 637 }
 638
 639 /**
 640  * Returns glossary entries tagged with a specified tag.
 641  *
 642  * This is a callback used by the tag area mod_glossary/glossary_entries to search for glossary entries
 643  * tagged with a specific tag.
 644  *
 645  * @param core_tag_tag $tag
 646  * @param bool $exclusivemode if set to true it means that no other entities tagged with this tag
 647  *             are displayed on the page and the per-page limit may be bigger
 648  * @param int $fromctx context id where the link was displayed, may be used by callbacks
 649  *            to display items in the same context first
 650  * @param int $ctx context id where to search for records
 651  * @param bool $rec search in subcontexts as well
 652  * @param int $page 0-based number of page being displayed
 653  * @return \core_tag\output\tagindex
 654  */
 655 function mod_glossary_get_tagged_entries($tag, $exclusivemode = false, $fromctx = 0, $ctx = 0, $rec = 1, $page = 0) {
 656     global $OUTPUT;
 657     $perpage = $exclusivemode ? 20 : 5;
 658
 659     // Build the SQL query.
 660     $ctxselect = context_helper::get_preload_record_columns_sql('ctx');
 661     $query = "SELECT ge.id, ge.concept, ge.glossaryid, ge.approved, ge.userid,
 662                     cm.id AS cmid, c.id AS courseid, c.shortname, c.fullname, $ctxselect
 663                 FROM {glossary_entries} ge
 664                 JOIN {glossary} g ON g.id = ge.glossaryid
 665                 JOIN {modules} m ON m.name='glossary'
 666                 JOIN {course_modules} cm ON cm.module = m.id AND cm.instance = g.id
 667                 JOIN {tag_instance} tt ON ge.id = tt.itemid
 668                 JOIN {course} c ON cm.course = c.id
 669                 JOIN {context} ctx ON ctx.instanceid = cm.id AND ctx.contextlevel = :coursemodulecontextlevel
 670                WHERE tt.itemtype = :itemtype AND tt.tagid = :tagid AND tt.component = :component
 671                  AND cm.deletioninprogress = 0
 672                  AND ge.id %ITEMFILTER% AND c.id %COURSEFILTER%";
 673
 674     $params = array('itemtype' => 'glossary_entries', 'tagid' => $tag->id, 'component' => 'mod_glossary',
 675                     'coursemodulecontextlevel' => CONTEXT_MODULE);
 676
 677     if ($ctx) {
 678         $context = $ctx ? context::instance_by_id($ctx) : context_system::instance();
 679         $query .= $rec ? ' AND (ctx.id = :contextid OR ctx.path LIKE :path)' : ' AND ctx.id = :contextid';
 680         $params['contextid'] = $context->id;
 681         $params['path'] = $context->path.'/%';
 682     }
 683
 684     $query .= " ORDER BY ";
 685     if ($fromctx) {
 686         // In order-clause specify that modules from inside "fromctx" context should be returned first.
 687         $fromcontext = context::instance_by_id($fromctx);
 688         $query .= ' (CASE WHEN ctx.id = :fromcontextid OR ctx.path LIKE :frompath THEN 0 ELSE 1 END),';
 689         $params['fromcontextid'] = $fromcontext->id;
 690         $params['frompath'] = $fromcontext->path.'/%';
 691     }
 692     $query .= ' c.sortorder, cm.id, ge.id';
 693
 694     $totalpages = $page + 1;
 695
 696     // Use core_tag_index_builder to build and filter the list of items.
 697     $builder = new core_tag_index_builder('mod_glossary', 'glossary_entries', $query, $params, $page * $perpage, $perpage + 1);
 698     while ($item = $builder->has_item_that_needs_access_check()) {
 699         context_helper::preload_from_record($item);
 700         $courseid = $item->courseid;
 701         if (!$builder->can_access_course($courseid)) {
 702             $builder->set_accessible($item, false);
 703             continue;
 704         }
 705         $modinfo = get_fast_modinfo($builder->get_course($courseid));
 706         // Set accessibility of this item and all other items in the same course.
 707         $builder->walk(function ($taggeditem) use ($courseid, $modinfo, $builder) {
 708             global $USER;
 709             if ($taggeditem->courseid == $courseid) {
 710                 $accessible = false;
 711                 if (($cm = $modinfo->get_cm($taggeditem->cmid)) && $cm->uservisible) {
 712                     if ($taggeditem->approved) {
 713                         $accessible = true;
 714                     } else if ($taggeditem->userid == $USER->id) {
 715                         $accessible = true;
 716                     } else {
 717                         $accessible = has_capability('mod/glossary:approve', context_module::instance($cm->id));
 718                     }
 719                 }
 720                 $builder->set_accessible($taggeditem, $accessible);
 721             }
 722         });
 723     }
 724
 725     $items = $builder->get_items();
 726     if (count($items) > $perpage) {
 727         $totalpages = $page + 2; // We don't need exact page count, just indicate that the next page exists.
 728         array_pop($items);
 729     }
 730
 731     // Build the display contents.
 732     if ($items) {
 733         $tagfeed = new core_tag\output\tagfeed();
 734         foreach ($items as $item) {
 735             context_helper::preload_from_record($item);
 736             $modinfo = get_fast_modinfo($item->courseid);
 737             $cm = $modinfo->get_cm($item->cmid);
 738             $pageurl = new moodle_url('/mod/glossary/showentry.php', array('eid' => $item->id, 'displayformat' => 'dictionary'));
 739             $pagename = format_string($item->concept, true, array('context' => context_module::instance($item->cmid)));
 740             $pagename = html_writer::link($pageurl, $pagename);
 741             $courseurl = course_get_url($item->courseid, $cm->sectionnum);
 742             $cmname = html_writer::link($cm->url, $cm->get_formatted_name());
 743             $coursename = format_string($item->fullname, true, array('context' => context_course::instance($item->courseid)));
 744             $coursename = html_writer::link($courseurl, $coursename);
 745             $icon = html_writer::link($pageurl, html_writer::empty_tag('img', array('src' => $cm->get_icon_url())));
 746             $tagfeed->add($icon, $pagename, $cmname.'<br>'.$coursename);
 747         }
 748
 749         $content = $OUTPUT->render_from_template('core_tag/tagfeed',
 750             $tagfeed->export_for_template($OUTPUT));
 751
 752         return new core_tag\output\tagindex($tag, 'mod_glossary', 'glossary_entries', $content,
 753             $exclusivemode, $fromctx, $ctx, $rec, $page, $totalpages);
 754     }
 755 }