[Summary view]

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

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * The class for displaying the forum report table.
  19   *
  20   * @package   forumreport_summary
  21   * @copyright 2019 Michael Hawkins <michaelh@moodle.com>
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace forumreport_summary;
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  require_once($CFG->libdir . '/tablelib.php');
  29  
  30  use coding_exception;
  31  use table_sql;
  32  
  33  /**
  34   * The class for displaying the forum report table.
  35   *
  36   * @copyright  2019 Michael Hawkins <michaelh@moodle.com>
  37   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  38   */
  39  class summary_table extends table_sql {
  40  
  41      /** Forum filter type */
  42      const FILTER_FORUM = 1;
  43  
  44      /** Groups filter type */
  45      const FILTER_GROUPS = 2;
  46  
  47      /** Dates filter type */
  48      const FILTER_DATES = 3;
  49  
  50      /** Table to store summary data extracted from the log table */
  51      const LOG_SUMMARY_TEMP_TABLE = 'forum_report_summary_counts';
  52  
  53      /** Default number of rows to display per page */
  54      const DEFAULT_PER_PAGE = 50;
  55  
  56      /** @var \stdClass The various SQL segments that will be combined to form queries to fetch various information. */
  57      public $sql;
  58  
  59      /** @var int The number of rows to be displayed per page. */
  60      protected $perpage = self::DEFAULT_PER_PAGE;
  61  
  62      /** @var array The values available for pagination size per page. */
  63      protected $perpageoptions = [50, 100, 200];
  64  
  65      /** @var int The course ID containing the forum(s) being reported on. */
  66      protected $courseid;
  67  
  68      /** @var bool True if reporting on all forums in course user has access to, false if reporting on a single forum */
  69      protected $iscoursereport = false;
  70  
  71      /** @var bool True if user has access to all forums in the course (and is running course report), otherwise false. */
  72      protected $accessallforums = false;
  73  
  74      /** @var \stdClass The course module object(s) of the forum(s) being reported on. */
  75      protected $cms = [];
  76  
  77      /**
  78       * @var int The user ID if only one user's summary will be generated.
  79       * This will apply to users without permission to view others' summaries.
  80       */
  81      protected $userid;
  82  
  83      /**
  84       * @var \core\log\sql_reader|null
  85       */
  86      protected $logreader = null;
  87  
  88      /**
  89       * @var array of \context objects for the forums included in the report.
  90       */
  91      protected $forumcontexts = [];
  92  
  93      /**
  94       * @var context_course|context_module The context where the report is being run (either a specific forum or the course).
  95       */
  96      protected $userfieldscontext = null;
  97  
  98      /** @var bool Whether the user has the capability/capabilities to perform bulk operations. */
  99      protected $allowbulkoperations = false;
 100  
 101      /**
 102       * @var bool
 103       */
 104      private $showwordcharcounts = null;
 105  
 106      /**
 107       * @var bool Whether the user can see all private replies or not.
 108       */
 109      protected $canseeprivatereplies;
 110  
 111      /**
 112       * @var array Validated filter data, for use in GET parameters by export links.
 113       */
 114      protected $exportfilterdata = [];
 115  
 116      /**
 117       * Forum report table constructor.
 118       *
 119       * @param int $courseid The ID of the course the forum(s) exist within.
 120       * @param array $filters Report filters in the format 'type' => [values].
 121       * @param bool $allowbulkoperations Is the user allowed to perform bulk operations?
 122       * @param bool $canseeprivatereplies Whether the user can see all private replies or not.
 123       * @param int $perpage The number of rows to display per page.
 124       * @param bool $canexport Is the user allowed to export records?
 125       * @param bool $iscoursereport Whether the user is running a course level report
 126       * @param bool $accessallforums If user is running a course level report, do they have access to all forums in the course?
 127       */
 128      public function __construct(int $courseid, array $filters, bool $allowbulkoperations,
 129              bool $canseeprivatereplies, int $perpage, bool $canexport, bool $iscoursereport, bool $accessallforums) {
 130          global $OUTPUT;
 131  
 132          $uniqueid = $courseid . ($iscoursereport ? '' : '_' . $filters['forums'][0]);
 133          parent::__construct("summaryreport_{$uniqueid}");
 134  
 135          $this->courseid = $courseid;
 136          $this->iscoursereport = $iscoursereport;
 137          $this->accessallforums = $accessallforums;
 138          $this->allowbulkoperations = $allowbulkoperations;
 139          $this->canseeprivatereplies = $canseeprivatereplies;
 140          $this->perpage = $perpage;
 141  
 142          $this->set_forum_properties($filters['forums']);
 143  
 144          $columnheaders = [];
 145  
 146          if ($allowbulkoperations) {
 147              $mastercheckbox = new \core\output\checkbox_toggleall('summaryreport-table', true, [
 148                  'id' => 'select-all-users',
 149                  'name' => 'select-all-users',
 150                  'label' => get_string('selectall'),
 151                  'labelclasses' => 'sr-only',
 152                  'classes' => 'm-1',
 153                  'checked' => false
 154              ]);
 155              $columnheaders['select'] = $OUTPUT->render($mastercheckbox);
 156          }
 157  
 158          $columnheaders += [
 159              'fullname' => get_string('fullnameuser'),
 160              'postcount' => get_string('postcount', 'forumreport_summary'),
 161              'replycount' => get_string('replycount', 'forumreport_summary'),
 162              'attachmentcount' => get_string('attachmentcount', 'forumreport_summary'),
 163          ];
 164  
 165          $this->logreader = $this->get_internal_log_reader();
 166          if ($this->logreader) {
 167              $columnheaders['viewcount'] = get_string('viewcount', 'forumreport_summary');
 168          }
 169  
 170          if ($this->show_word_char_counts()) {
 171              $columnheaders['wordcount'] = get_string('wordcount', 'forumreport_summary');
 172              $columnheaders['charcount'] = get_string('charcount', 'forumreport_summary');
 173          }
 174  
 175          $columnheaders['earliestpost'] = get_string('earliestpost', 'forumreport_summary');
 176          $columnheaders['latestpost'] = get_string('latestpost', 'forumreport_summary');
 177  
 178          if ($canexport) {
 179              $columnheaders['export'] = get_string('exportposts', 'forumreport_summary');
 180          }
 181  
 182          $this->define_columns(array_keys($columnheaders));
 183          $this->define_headers(array_values($columnheaders));
 184  
 185          // Define configs.
 186          $this->define_table_configs();
 187  
 188          // Apply relevant filters.
 189          $this->define_base_filter_sql();
 190          $this->apply_filters($filters);
 191  
 192          // Define the basic SQL data and object format.
 193          $this->define_base_sql();
 194      }
 195  
 196      /**
 197       * Sets properties that are determined by forum filter values.
 198       *
 199       * @param array $forumids The forum IDs passed in by the filter.
 200       * @return void
 201       */
 202      protected function set_forum_properties(array $forumids): void {
 203          global $USER;
 204  
 205          // Course context if reporting on all forums in the course the user has access to.
 206          if ($this->iscoursereport) {
 207              $this->userfieldscontext = \context_course::instance($this->courseid);
 208          }
 209  
 210          foreach ($forumids as $forumid) {
 211              $cm = get_coursemodule_from_instance('forum', $forumid, $this->courseid);
 212              $this->cms[] = $cm;
 213              $this->forumcontexts[$cm->id] = \context_module::instance($cm->id);
 214  
 215              // Set forum context if not reporting on course.
 216              if (!isset($this->userfieldscontext)) {
 217                  $this->userfieldscontext = $this->forumcontexts[$cm->id];
 218              }
 219  
 220              // Only show own summary unless they have permission to view all in every forum being reported.
 221              if (empty($this->userid) && !has_capability('forumreport/summary:viewall', $this->forumcontexts[$cm->id])) {
 222                  $this->userid = $USER->id;
 223              }
 224          }
 225      }
 226  
 227      /**
 228       * Provides the string name of each filter type, to be used by errors.
 229       * Note: This does not use language strings as the value is injected into error strings.
 230       *
 231       * @param int $filtertype Type of filter
 232       * @return string Name of the filter
 233       */
 234      protected function get_filter_name(int $filtertype): string {
 235          $filternames = [
 236              self::FILTER_FORUM => 'Forum',
 237              self::FILTER_GROUPS => 'Groups',
 238              self::FILTER_DATES => 'Dates',
 239          ];
 240  
 241          return $filternames[$filtertype];
 242      }
 243  
 244      /**
 245       * Generate the select column.
 246       *
 247       * @param \stdClass $data
 248       * @return string
 249       */
 250      public function col_select($data) {
 251          global $OUTPUT;
 252  
 253          $checkbox = new \core\output\checkbox_toggleall('summaryreport-table', false, [
 254              'classes' => 'usercheckbox m-1',
 255              'id' => 'user' . $data->userid,
 256              'name' => 'user' . $data->userid,
 257              'checked' => false,
 258              'label' => get_string('selectitem', 'moodle', fullname($data)),
 259              'labelclasses' => 'accesshide',
 260          ]);
 261  
 262          return $OUTPUT->render($checkbox);
 263      }
 264  
 265      /**
 266       * Generate the fullname column.
 267       *
 268       * @param \stdClass $data The row data.
 269       * @return string User's full name.
 270       */
 271      public function col_fullname($data): string {
 272          if ($this->is_downloading()) {
 273              return fullname($data);
 274          }
 275  
 276          global $OUTPUT;
 277          return $OUTPUT->user_picture($data, array('courseid' => $this->courseid, 'includefullname' => true));
 278      }
 279  
 280      /**
 281       * Generate the postcount column.
 282       *
 283       * @param \stdClass $data The row data.
 284       * @return int number of discussion posts made by user.
 285       */
 286      public function col_postcount(\stdClass $data): int {
 287          return $data->postcount;
 288      }
 289  
 290      /**
 291       * Generate the replycount column.
 292       *
 293       * @param \stdClass $data The row data.
 294       * @return int number of replies made by user.
 295       */
 296      public function col_replycount(\stdClass $data): int {
 297          return $data->replycount;
 298      }
 299  
 300      /**
 301       * Generate the attachmentcount column.
 302       *
 303       * @param \stdClass $data The row data.
 304       * @return int number of files attached to posts by user.
 305       */
 306      public function col_attachmentcount(\stdClass $data): int {
 307          return $data->attachmentcount;
 308      }
 309  
 310      /**
 311       * Generate the earliestpost column.
 312       *
 313       * @param \stdClass $data The row data.
 314       * @return string Timestamp of user's earliest post, or a dash if no posts exist.
 315       */
 316      public function col_earliestpost(\stdClass $data): string {
 317          global $USER;
 318  
 319          return empty($data->earliestpost) ? '-' : userdate($data->earliestpost, "", \core_date::get_user_timezone($USER));
 320      }
 321  
 322      /**
 323       * Generate the latestpost column.
 324       *
 325       * @param \stdClass $data The row data.
 326       * @return string Timestamp of user's most recent post, or a dash if no posts exist.
 327       */
 328      public function col_latestpost(\stdClass $data): string {
 329          global $USER;
 330  
 331          return empty($data->latestpost) ? '-' : userdate($data->latestpost, "", \core_date::get_user_timezone($USER));
 332      }
 333  
 334      /**
 335       * Generate the export column.
 336       *
 337       * @param \stdClass $data The row data.
 338       * @return string The link to export content belonging to the row.
 339       */
 340      public function col_export(\stdClass $data): string {
 341          global $OUTPUT;
 342  
 343          // If no posts, nothing to export.
 344          if (empty($data->earliestpost)) {
 345              return '';
 346          }
 347  
 348          $params = [
 349              'id' => $this->cms[0]->instance, // Forum id.
 350              'userids[]' => $data->userid, // User id.
 351          ];
 352  
 353          // Add relevant filter params.
 354          foreach ($this->exportfilterdata as $name => $data) {
 355              if (is_array($data)) {
 356                  foreach ($data as $key => $value) {
 357                      $params["{$name}[{$key}]"] = $value;
 358                  }
 359              } else {
 360                  $params[$name] = $data;
 361              }
 362          }
 363  
 364          $buttoncontext = [
 365              'url' => new \moodle_url('/mod/forum/export.php', $params),
 366              'label' => get_string('exportpostslabel', 'forumreport_summary', fullname($data)),
 367          ];
 368  
 369          return $OUTPUT->render_from_template('forumreport_summary/export_link_button', $buttoncontext);
 370      }
 371  
 372      /**
 373       * Override the default implementation to set a decent heading level.
 374       *
 375       * @return void.
 376       */
 377      public function print_nothing_to_display(): void {
 378          global $OUTPUT;
 379  
 380          echo $OUTPUT->heading(get_string('nothingtodisplay'), 4);
 381      }
 382  
 383      /**
 384       * Query the db. Store results in the table object for use by build_table.
 385       *
 386       * @param int $pagesize Size of page for paginated displayed table.
 387       * @param bool $useinitialsbar Overridden but unused.
 388       * @return void
 389       */
 390      public function query_db($pagesize, $useinitialsbar = false): void {
 391          global $DB;
 392  
 393          // Set up pagination if not downloading the whole report.
 394          if (!$this->is_downloading()) {
 395              $totalsql = $this->get_full_sql(false);
 396  
 397              // Set up pagination.
 398              $totalrows = $DB->count_records_sql($totalsql, $this->sql->params);
 399              $this->pagesize($pagesize, $totalrows);
 400          }
 401  
 402          // Fetch the data.
 403          $sql = $this->get_full_sql();
 404  
 405          // Only paginate when not downloading.
 406          if (!$this->is_downloading()) {
 407              $this->rawdata = $DB->get_records_sql($sql, $this->sql->params, $this->get_page_start(), $this->get_page_size());
 408          } else {
 409              $this->rawdata = $DB->get_records_sql($sql, $this->sql->params);
 410          }
 411      }
 412  
 413      /**
 414       * Adds the relevant SQL to apply a filter to the report.
 415       *
 416       * @param int $filtertype Filter type as defined by class constants.
 417       * @param array $values Optional array of values passed into the filter type.
 418       * @return void
 419       * @throws coding_exception
 420       */
 421      public function add_filter(int $filtertype, array $values = []): void {
 422          global $DB;
 423  
 424          $paramcounterror = false;
 425  
 426          switch($filtertype) {
 427              case self::FILTER_FORUM:
 428                  // Requires at least one forum ID.
 429                  if (empty($values)) {
 430                      $paramcounterror = true;
 431                  } else {
 432                      // No select fields required - displayed in title.
 433                      // No extra joins required, forum is already joined.
 434                      list($forumidin, $forumidparams) = $DB->get_in_or_equal($values, SQL_PARAMS_NAMED);
 435                      $this->sql->filterwhere .= " AND f.id {$forumidin}";
 436                      $this->sql->params += $forumidparams;
 437                  }
 438  
 439                  break;
 440  
 441              case self::FILTER_GROUPS:
 442                  // Filter data to only include content within specified groups (and/or no groups).
 443                  // Additionally, only display users who can post within the selected option(s).
 444  
 445                  // Only filter by groups the user has access to.
 446                  $groups = $this->get_filter_groups($values);
 447  
 448                  // Skip adding filter if not applied, or all valid options are selected.
 449                  if (!empty($groups)) {
 450                      list($groupidin, $groupidparams) = $DB->get_in_or_equal($groups, SQL_PARAMS_NAMED);
 451  
 452                      // Posts within selected groups and/or not in any groups (group ID -1) are included.
 453                      // No user filtering as anyone enrolled can potentially post to unrestricted discussions.
 454                      if (array_search(-1, $groups) !== false) {
 455                          $this->sql->filterwhere .= " AND d.groupid {$groupidin}";
 456                          $this->sql->params += $groupidparams;
 457  
 458                      } else {
 459                          // Only posts and users within selected groups are included.
 460                          list($groupusersin, $groupusersparams) = $DB->get_in_or_equal($groups, SQL_PARAMS_NAMED);
 461  
 462                          // No joins required (handled by where to prevent data duplication).
 463                          $this->sql->filterwhere .= "
 464                              AND u.id IN (
 465                                  SELECT gm.userid
 466                                    FROM {groups_members} gm
 467                                   WHERE gm.groupid {$groupusersin}
 468                              )
 469                              AND d.groupid {$groupidin}";
 470                          $this->sql->params += $groupusersparams + $groupidparams;
 471                      }
 472                  }
 473  
 474                  break;
 475  
 476              case self::FILTER_DATES:
 477                  if (!isset($values['from']['enabled']) || !isset($values['to']['enabled']) ||
 478                          ($values['from']['enabled'] && !isset($values['from']['timestamp'])) ||
 479                          ($values['to']['enabled'] && !isset($values['to']['timestamp']))) {
 480                      $paramcounterror = true;
 481                  } else {
 482                      $this->sql->filterbase['dates'] = '';
 483                      $this->sql->filterbase['dateslog'] = '';
 484                      $this->sql->filterbase['dateslogparams'] = [];
 485  
 486                      // From date.
 487                      if ($values['from']['enabled']) {
 488                          // If the filter was enabled, include the date restriction.
 489                          // Needs to form part of the base join to posts, so will be injected by define_base_sql().
 490                          $this->sql->filterbase['dates'] .= " AND p.created >= :fromdate";
 491                          $this->sql->params['fromdate'] = $values['from']['timestamp'];
 492                          $this->sql->filterbase['dateslog'] .= ' AND timecreated >= :fromdate';
 493                          $this->sql->filterbase['dateslogparams']['fromdate'] = $values['from']['timestamp'];
 494                          $this->exportfilterdata['timestampfrom'] = $values['from']['timestamp'];
 495                      }
 496  
 497                      // To date.
 498                      if ($values['to']['enabled']) {
 499                          // If the filter was enabled, include the date restriction.
 500                          // Needs to form part of the base join to posts, so will be injected by define_base_sql().
 501                          $this->sql->filterbase['dates'] .= " AND p.created <= :todate";
 502                          $this->sql->params['todate'] = $values['to']['timestamp'];
 503                          $this->sql->filterbase['dateslog'] .= ' AND timecreated <= :todate';
 504                          $this->sql->filterbase['dateslogparams']['todate'] = $values['to']['timestamp'];
 505                          $this->exportfilterdata['timestampto'] = $values['to']['timestamp'];
 506                      }
 507                  }
 508  
 509                  break;
 510              default:
 511                  throw new coding_exception("Report filter type '{$filtertype}' not found.");
 512                  break;
 513          }
 514  
 515          if ($paramcounterror) {
 516              $filtername = $this->get_filter_name($filtertype);
 517              throw new coding_exception("An invalid number of values have been passed for the '{$filtername}' filter.");
 518          }
 519      }
 520  
 521      /**
 522       * Define various table config options.
 523       *
 524       * @return void.
 525       */
 526      protected function define_table_configs(): void {
 527          $this->collapsible(false);
 528          $this->sortable(true, 'firstname', SORT_ASC);
 529          $this->pageable(true);
 530          $this->is_downloadable(true);
 531          $this->no_sorting('select');
 532          $this->no_sorting('export');
 533          $this->set_attribute('id', 'forumreport_summary_table');
 534          $this->sql = new \stdClass();
 535          $this->sql->params = [];
 536      }
 537  
 538      /**
 539       * Define the object to store all for the table SQL and initialises the base SQL required.
 540       *
 541       * @return void.
 542       */
 543      protected function define_base_sql(): void {
 544          global $USER;
 545  
 546          // TODO Does not support custom user profile fields (MDL-70456).
 547          $userfieldsapi = \core_user\fields::for_identity($this->userfieldscontext, false)->with_userpic();
 548          $userfieldssql = $userfieldsapi->get_sql('u', false, '', '', false)->selects;
 549  
 550          // Define base SQL query format.
 551          $this->sql->basefields = ' u.id AS userid,
 552                                     d.course AS courseid,
 553                                     SUM(CASE WHEN p.parent = 0 THEN 1 ELSE 0 END) AS postcount,
 554                                     SUM(CASE WHEN p.parent != 0 THEN 1 ELSE 0 END) AS replycount,
 555                                     ' . $userfieldssql . ',
 556                                     SUM(CASE WHEN att.attcount IS NULL THEN 0 ELSE att.attcount END) AS attachmentcount,
 557                                     MIN(p.created) AS earliestpost,
 558                                     MAX(p.created) AS latestpost';
 559  
 560          // Handle private replies.
 561          $privaterepliessql = '';
 562          $privaterepliesparams = [];
 563          if (!$this->canseeprivatereplies) {
 564              $privaterepliessql = ' AND (p.privatereplyto = :privatereplyto
 565                                          OR p.userid = :privatereplyfrom
 566                                          OR p.privatereplyto = 0)';
 567              $privaterepliesparams['privatereplyto'] = $USER->id;
 568              $privaterepliesparams['privatereplyfrom'] = $USER->id;
 569          }
 570  
 571          list($enrolleduserssql, $enrolledusersparams) = get_enrolled_sql($this->get_context());
 572          $this->sql->params += $enrolledusersparams;
 573  
 574          $queryattachments = 'SELECT COUNT(fi.id) AS attcount, fi.itemid AS postid, fi.userid
 575                                 FROM {files} fi
 576                                WHERE fi.component = :component AND fi.filesize > 0
 577                             GROUP BY fi.itemid, fi.userid';
 578          $this->sql->basefromjoins = ' {user} u
 579                                   JOIN (' . $enrolleduserssql . ') enrolledusers ON enrolledusers.id = u.id
 580                                   JOIN {forum} f ON f.course = :forumcourseid
 581                                   JOIN {forum_discussions} d ON d.forum = f.id
 582                              LEFT JOIN {forum_posts} p ON p.discussion = d.id AND p.userid = u.id '
 583                                      . $privaterepliessql
 584                                      . $this->sql->filterbase['dates'] . '
 585                              LEFT JOIN (' . $queryattachments . ') att ON att.postid = p.id AND att.userid = u.id';
 586  
 587          $this->sql->basewhere = '1 = 1';
 588          $this->sql->basegroupby = "$userfieldssql, d.course";
 589  
 590          if ($this->logreader) {
 591              $this->fill_log_summary_temp_table();
 592  
 593              $this->sql->basefields .= ', CASE WHEN tmp.viewcount IS NOT NULL THEN tmp.viewcount ELSE 0 END AS viewcount';
 594              $this->sql->basefromjoins .= ' LEFT JOIN {' . self::LOG_SUMMARY_TEMP_TABLE . '} tmp ON tmp.userid = u.id ';
 595              $this->sql->basegroupby .= ', tmp.viewcount';
 596          }
 597  
 598          if ($this->show_word_char_counts()) {
 599              // All p.wordcount values should be NOT NULL, this CASE WHEN is an extra just-in-case.
 600              $this->sql->basefields .= ', SUM(CASE WHEN p.wordcount IS NOT NULL THEN p.wordcount ELSE 0 END) AS wordcount';
 601              $this->sql->basefields .= ', SUM(CASE WHEN p.charcount IS NOT NULL THEN p.charcount ELSE 0 END) AS charcount';
 602          }
 603  
 604          $this->sql->params += [
 605              'component' => 'mod_forum',
 606              'forumcourseid' => $this->courseid,
 607          ] + $privaterepliesparams;
 608  
 609          // Handle if a user is limited to viewing their own summary.
 610          if (!empty($this->userid)) {
 611              $this->sql->basewhere .= ' AND u.id = :userid';
 612              $this->sql->params['userid'] = $this->userid;
 613          }
 614      }
 615  
 616      /**
 617       * Instantiate the properties to store filter values.
 618       *
 619       * @return void.
 620       */
 621      protected function define_base_filter_sql(): void {
 622          // Filter values will be populated separately where required.
 623          $this->sql->filterfields = '';
 624          $this->sql->filterfromjoins = '';
 625          $this->sql->filterwhere = '';
 626          $this->sql->filtergroupby = '';
 627      }
 628  
 629      /**
 630       * Overriding the parent method because it should not be used here.
 631       * Filters are applied, so the structure of $this->sql is now different to the way this is set up in the parent.
 632       *
 633       * @param string $fields Unused.
 634       * @param string $from Unused.
 635       * @param string $where Unused.
 636       * @param array $params Unused.
 637       * @return void.
 638       *
 639       * @throws coding_exception
 640       */
 641      public function set_sql($fields, $from, $where, array $params = []) {
 642          throw new coding_exception('The set_sql method should not be used by the summary_table class.');
 643      }
 644  
 645      /**
 646       * Convenience method to call a number of methods for you to display the table.
 647       * Overrides the parent so SQL for filters is handled.
 648       *
 649       * @param int $pagesize Number of rows to fetch.
 650       * @param bool $useinitialsbar Whether to include the initials bar with the table.
 651       * @param string $downloadhelpbutton Unused.
 652       *
 653       * @return void.
 654       */
 655      public function out($pagesize, $useinitialsbar, $downloadhelpbutton = ''): void {
 656          global $DB;
 657  
 658          if (!$this->columns) {
 659              $sql = $this->get_full_sql();
 660  
 661              $onerow = $DB->get_record_sql($sql, $this->sql->params, IGNORE_MULTIPLE);
 662  
 663              // If columns is not set, define columns as the keys of the rows returned from the db.
 664              $this->define_columns(array_keys((array)$onerow));
 665              $this->define_headers(array_keys((array)$onerow));
 666          }
 667  
 668          $this->setup();
 669          $this->query_db($pagesize, $useinitialsbar);
 670          $this->build_table();
 671          $this->close_recordset();
 672          $this->finish_output();
 673  
 674          // Drop the temp table when necessary.
 675          if ($this->logreader) {
 676              $this->drop_log_summary_temp_table();
 677          }
 678      }
 679  
 680      /**
 681       * Apply the relevant filters to the report.
 682       *
 683       * @param array $filters Report filters in the format 'type' => [values].
 684       * @return void.
 685       */
 686      protected function apply_filters(array $filters): void {
 687          // Apply the forums filter if not reporting on every forum in a course.
 688          if (!$this->accessallforums) {
 689              $this->add_filter(self::FILTER_FORUM, $filters['forums']);
 690          }
 691  
 692          // Apply groups filter.
 693          $this->add_filter(self::FILTER_GROUPS, $filters['groups']);
 694  
 695          // Apply dates filter.
 696          $datevalues = [
 697              'from' => $filters['datefrom'],
 698              'to' => $filters['dateto'],
 699          ];
 700          $this->add_filter(self::FILTER_DATES, $datevalues);
 701      }
 702  
 703      /**
 704       * Prepares a complete SQL statement from the base query and any filters defined.
 705       *
 706       * @param bool $fullselect Whether to select all relevant columns.
 707       *              False selects a count only (used to calculate pagination).
 708       * @return string The complete SQL statement.
 709       */
 710      protected function get_full_sql(bool $fullselect = true): string {
 711          $groupby = '';
 712          $orderby = '';
 713  
 714          if ($fullselect) {
 715              $selectfields = "{$this->sql->basefields}
 716                               {$this->sql->filterfields}";
 717  
 718              $groupby = ' GROUP BY ' . $this->sql->basegroupby . $this->sql->filtergroupby;
 719  
 720              if ($sort = $this->get_sql_sort()) {
 721                  $orderby = " ORDER BY {$sort}";
 722              }
 723          } else {
 724              $selectfields = 'COUNT(u.id)';
 725          }
 726  
 727          $sql = "SELECT {$selectfields}
 728                    FROM {$this->sql->basefromjoins}
 729                         {$this->sql->filterfromjoins}
 730                   WHERE {$this->sql->basewhere}
 731                         {$this->sql->filterwhere}
 732                         {$groupby}
 733                         {$orderby}";
 734  
 735          return $sql;
 736      }
 737  
 738      /**
 739       * Returns an internal and enabled log reader.
 740       *
 741       * @return \core\log\sql_reader|false
 742       */
 743      protected function get_internal_log_reader(): ?\core\log\sql_reader {
 744          global $DB;
 745  
 746          $readers = get_log_manager()->get_readers('core\log\sql_reader');
 747          foreach ($readers as $reader) {
 748  
 749              // If reader is not a sql_internal_table_reader and not legacy store then return.
 750              if (!($reader instanceof \core\log\sql_internal_table_reader) && !($reader instanceof logstore_legacy\log\store)) {
 751                  continue;
 752              }
 753              $logreader = $reader;
 754          }
 755  
 756          if (empty($logreader)) {
 757              return null;
 758          }
 759  
 760          return $logreader;
 761      }
 762  
 763      /**
 764       * Fills the log summary temp table.
 765       *
 766       * @return null
 767       */
 768      protected function fill_log_summary_temp_table() {
 769          global $DB;
 770  
 771          $this->create_log_summary_temp_table();
 772  
 773          if ($this->logreader instanceof logstore_legacy\log\store) {
 774              $logtable = 'log';
 775              // Anonymous actions are never logged in legacy log.
 776              $nonanonymous = '';
 777          } else {
 778              $logtable = $this->logreader->get_internal_log_table_name();
 779              $nonanonymous = 'AND anonymous = 0';
 780          }
 781  
 782          // Apply dates filter if applied.
 783          $datewhere = $this->sql->filterbase['dateslog'] ?? '';
 784          $dateparams = $this->sql->filterbase['dateslogparams'] ?? [];
 785  
 786          $contextids = [];
 787  
 788          foreach ($this->forumcontexts as $forumcontext) {
 789              $contextids[] = $forumcontext->id;
 790          }
 791  
 792          list($contextidin, $contextidparams) = $DB->get_in_or_equal($contextids, SQL_PARAMS_NAMED);
 793  
 794          $params = $contextidparams + $dateparams;
 795          $sql = "INSERT INTO {" . self::LOG_SUMMARY_TEMP_TABLE . "} (userid, viewcount)
 796                       SELECT userid, COUNT(*) AS viewcount
 797                         FROM {" . $logtable . "}
 798                        WHERE contextid {$contextidin}
 799                              $datewhere
 800                              $nonanonymous
 801                     GROUP BY userid";
 802          $DB->execute($sql, $params);
 803      }
 804  
 805      /**
 806       * Creates a temp table to store summary data from the log table for this request.
 807       *
 808       * @return null
 809       */
 810      protected function create_log_summary_temp_table() {
 811          global $DB;
 812  
 813          $dbman = $DB->get_manager();
 814          $temptablename = self::LOG_SUMMARY_TEMP_TABLE;
 815          $xmldbtable = new \xmldb_table($temptablename);
 816          $xmldbtable->add_field('userid', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, null);
 817          $xmldbtable->add_field('viewcount', XMLDB_TYPE_INTEGER, 10, null, XMLDB_NOTNULL, null, null);
 818          $xmldbtable->add_key('primary', XMLDB_KEY_PRIMARY, array('userid'));
 819  
 820          $dbman->create_temp_table($xmldbtable);
 821      }
 822  
 823      /**
 824       * Drops the temp table.
 825       *
 826       * This should be called once the processing for the summary table has been done.
 827       */
 828      protected function drop_log_summary_temp_table(): void {
 829          global $DB;
 830  
 831          // Drop the temp table if it exists.
 832          $temptable = new \xmldb_table(self::LOG_SUMMARY_TEMP_TABLE);
 833          $dbman = $DB->get_manager();
 834          if ($dbman->table_exists($temptable)) {
 835              $dbman->drop_table($temptable);
 836          }
 837      }
 838  
 839      /**
 840       * Get the final list of groups to filter by, based on the groups submitted,
 841       * and those the user has access to.
 842       *
 843       *
 844       * @param array $groups The group IDs submitted.
 845       * @return array Group objects of groups to use in groups filter.
 846       *                If no filtering required (all groups selected), returns [].
 847       */
 848      protected function get_filter_groups(array $groups): array {
 849          global $USER;
 850  
 851          $usergroups = groups_get_all_groups($this->courseid, $USER->id);
 852          $coursegroupsobj = groups_get_all_groups($this->courseid);
 853          $allgroups = false;
 854          $allowedgroupsobj = [];
 855          $allowedgroups = [];
 856          $filtergroups = [];
 857  
 858          foreach ($this->cms as $cm) {
 859              // Only need to check for all groups access if not confirmed by a previous check.
 860              if (!$allgroups) {
 861                  $groupmode = groups_get_activity_groupmode($cm);
 862  
 863                  // If no groups mode enabled on the forum, nothing to prepare.
 864                  if (!in_array($groupmode, [VISIBLEGROUPS, SEPARATEGROUPS])) {
 865                      continue;
 866                  }
 867  
 868                  $aag = has_capability('moodle/site:accessallgroups', $this->forumcontexts[$cm->id]);
 869  
 870                  if ($groupmode == VISIBLEGROUPS || $aag) {
 871                      $allgroups = true;
 872  
 873                      // All groups in course fetched, no need to continue checking for others.
 874                      break;
 875                  }
 876              }
 877          }
 878  
 879          if ($allgroups) {
 880              $nogroups = new \stdClass();
 881              $nogroups->id = -1;
 882              $nogroups->name = get_string('groupsnone');
 883  
 884              // Any groups and no groups.
 885              $allowedgroupsobj = $coursegroupsobj + [$nogroups];
 886          } else {
 887              $allowedgroupsobj = $usergroups;
 888          }
 889  
 890          foreach ($allowedgroupsobj as $group) {
 891              $allowedgroups[] = $group->id;
 892          }
 893  
 894          // If not all groups in course are selected, filter by allowed groups submitted.
 895          if (!empty($groups)) {
 896              if (!empty(array_diff($allowedgroups, $groups))) {
 897                  $filtergroups = array_intersect($groups, $allowedgroups);
 898              } else {
 899                  $coursegroups = [];
 900  
 901                  foreach ($coursegroupsobj as $group) {
 902                      $coursegroups[] = $group->id;
 903                  }
 904  
 905                  // If user's 'all groups' is a subset of the course groups, filter by all groups available to them.
 906                  if (!empty(array_diff($coursegroups, $allowedgroups))) {
 907                      $filtergroups = $allowedgroups;
 908                  }
 909              }
 910          }
 911  
 912          return $filtergroups;
 913      }
 914  
 915      /**
 916       * Download the summary report in the selected format.
 917       *
 918       * @param string $format The format to download the report.
 919       */
 920      public function download($format) {
 921          $filename = 'summary_report_' . userdate(time(), get_string('backupnameformat', 'langconfig'),
 922                  99, false);
 923  
 924          $this->is_downloading($format, $filename);
 925          $this->out($this->perpage, false);
 926      }
 927  
 928      /*
 929       * Should the word / char counts be displayed?
 930       *
 931       * We don't want to show word/char columns if there is any null value because this means
 932       * that they have not been calculated yet.
 933       * @return bool
 934       */
 935      protected function show_word_char_counts(): bool {
 936          global $DB;
 937  
 938          if (is_null($this->showwordcharcounts)) {
 939              $forumids = [];
 940  
 941              foreach ($this->cms as $cm) {
 942                  $forumids[] = $cm->instance;
 943              }
 944  
 945              list($forumidin, $forumidparams) = $DB->get_in_or_equal($forumids, SQL_PARAMS_NAMED);
 946  
 947              // This should be really fast.
 948              $sql = "SELECT 'x'
 949                        FROM {forum_posts} fp
 950                        JOIN {forum_discussions} fd ON fd.id = fp.discussion
 951                       WHERE fd.forum {$forumidin} AND (fp.wordcount IS NULL OR fp.charcount IS NULL)";
 952  
 953              if ($DB->record_exists_sql($sql, $forumidparams)) {
 954                  $this->showwordcharcounts = false;
 955              } else {
 956                  $this->showwordcharcounts = true;
 957              }
 958          }
 959  
 960          return $this->showwordcharcounts;
 961      }
 962  
 963      /**
 964       * Fetch the number of items to be displayed per page.
 965       *
 966       * @return int
 967       */
 968      public function get_perpage(): int {
 969          return $this->perpage;
 970      }
 971  
 972      /**
 973       * Overriding method to render the bulk actions and items per page pagination options directly below the table.
 974       *
 975       * @return void
 976       */
 977      public function wrap_html_finish(): void {
 978          global $OUTPUT;
 979  
 980          $data = new \stdClass();
 981          $data->showbulkactions = $this->allowbulkoperations;
 982  
 983          if ($data->showbulkactions) {
 984              $data->id = 'formactionid';
 985              $data->attributes = [
 986                  [
 987                      'name' => 'data-action',
 988                      'value' => 'toggle'
 989                  ],
 990                  [
 991                      'name' => 'data-togglegroup',
 992                      'value' => 'summaryreport-table'
 993                  ],
 994                  [
 995                      'name' => 'data-toggle',
 996                      'value' => 'action'
 997                  ],
 998                  [
 999                      'name' => 'disabled',
1000                      'value' => true
1001                  ]
1002              ];
1003              $data->actions = [
1004                  [
1005                      'value' => '#messageselect',
1006                      'name' => get_string('messageselectadd')
1007                  ]
1008              ];
1009          }
1010  
1011          // Include the pagination size selector.
1012          $perpageoptions = array_combine($this->perpageoptions, $this->perpageoptions);
1013          $selected = in_array($this->perpage, $this->perpageoptions) ? $this->perpage : $this->perpageoptions[0];
1014          $perpageselect = new \single_select(new \moodle_url(''), 'perpage',
1015                  $perpageoptions, $selected, null, 'selectperpage');
1016          $perpageselect->set_label(get_string('perpage', 'moodle'));
1017  
1018          $data->perpage = $perpageselect->export_for_template($OUTPUT);
1019  
1020          echo $OUTPUT->render_from_template('forumreport_summary/bulk_action_menu', $data);
1021      }
1022  }