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

   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   * View user acceptances to the policies
  19   *
  20   * @package     tool_policy
  21   * @copyright   2018 Marina Glancy
  22   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace tool_policy;
  26  
  27  use tool_policy\output\acceptances_filter;
  28  use tool_policy\output\renderer;
  29  use tool_policy\output\user_agreement;
  30  use core_user;
  31  use stdClass;
  32  
  33  defined('MOODLE_INTERNAL') || die();
  34  
  35  global $CFG;
  36  require_once($CFG->dirroot.'/lib/tablelib.php');
  37  
  38  /**
  39   * Class acceptances_table
  40   *
  41   * @package     tool_policy
  42   * @copyright   2018 Marina Glancy
  43   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  44   */
  45  class acceptances_table extends \table_sql {
  46  
  47      /** @var array */
  48      protected $versionids;
  49  
  50      /** @var acceptances_filter */
  51      protected $acceptancesfilter;
  52  
  53      /** @var renderer */
  54      protected $output;
  55  
  56      /**
  57       * @var string[] The list of countries.
  58       */
  59      protected $countries;
  60  
  61      /** @var bool are there any users that this user can agree on behalf of */
  62      protected $canagreeany = false;
  63  
  64      /**
  65       * Constructor.
  66       *
  67       * @param string $uniqueid Table identifier.
  68       * @param acceptances_filter $acceptancesfilter
  69       * @param renderer $output
  70       */
  71      public function __construct($uniqueid, acceptances_filter $acceptancesfilter, renderer $output) {
  72          global $CFG;
  73          parent::__construct($uniqueid);
  74          $this->set_attribute('id', 'acceptancetable');
  75          $this->acceptancesfilter = $acceptancesfilter;
  76          $this->is_downloading(optional_param('download', 0, PARAM_ALPHA), 'user_acceptances');
  77          $this->baseurl = $acceptancesfilter->get_url();
  78          $this->output = $output;
  79  
  80          $this->versionids = [];
  81          $versions = $acceptancesfilter->get_versions();
  82          if (count($versions) > 1) {
  83              foreach ($versions as $version) {
  84                  $this->versionids[$version->id] = $version->name;
  85              }
  86          } else {
  87              $version = reset($versions);
  88              $this->versionids[$version->id] = $version->name;
  89              if ($version->status != policy_version::STATUS_ACTIVE) {
  90                  $this->versionids[$version->id] .= '<br>' . $version->revision;
  91              }
  92          }
  93  
  94          $extrafields = get_extra_user_fields(\context_system::instance());
  95          $userfields = \user_picture::fields('u', $extrafields);
  96  
  97          $this->set_sql("$userfields",
  98              "{user} u",
  99              'u.id <> :siteguestid AND u.deleted = 0',
 100              ['siteguestid' => $CFG->siteguest]);
 101          if (!$this->is_downloading()) {
 102              $this->add_column_header('select', get_string('select'), false, 'colselect');
 103          }
 104          $this->add_column_header('fullname', get_string('fullnameuser', 'core'));
 105          foreach ($extrafields as $field) {
 106              $this->add_column_header($field, get_user_field_name($field));
 107          }
 108  
 109          if (!$this->is_downloading() && !has_capability('tool/policy:acceptbehalf', \context_system::instance())) {
 110              // We will need to check capability to accept on behalf in each user's context, preload users contexts.
 111              $this->sql->fields .= ',' . \context_helper::get_preload_record_columns_sql('ctx');
 112              $this->sql->from .= ' JOIN {context} ctx ON ctx.contextlevel = :usercontextlevel AND ctx.instanceid = u.id';
 113              $this->sql->params['usercontextlevel'] = CONTEXT_USER;
 114          }
 115  
 116          if ($this->acceptancesfilter->get_single_version()) {
 117              $this->configure_for_single_version();
 118          } else {
 119              $this->configure_for_multiple_versions();
 120          }
 121  
 122          $this->build_sql_for_search_string($extrafields);
 123          $this->build_sql_for_capability_filter();
 124          $this->build_sql_for_roles_filter();
 125  
 126          $this->sortable(true, 'firstname');
 127      }
 128  
 129      /**
 130       * Remove randomness from the list by always sorting by user id in the end
 131       *
 132       * @return array
 133       */
 134      public function get_sort_columns() {
 135          $c = parent::get_sort_columns();
 136          $c['u.id'] = SORT_ASC;
 137          return $c;
 138      }
 139  
 140      /**
 141       * Allows to add only one column name and header to the table (parent class methods only allow to set all).
 142       *
 143       * @param string $key
 144       * @param string $label
 145       * @param bool $sortable
 146       * @param string $columnclass
 147       */
 148      protected function add_column_header($key, $label, $sortable = true, $columnclass = '') {
 149          if (empty($this->columns)) {
 150              $this->define_columns([$key]);
 151              $this->define_headers([$label]);
 152          } else {
 153              $this->columns[$key] = count($this->columns);
 154              $this->column_style[$key] = array();
 155              $this->column_class[$key] = $columnclass;
 156              $this->column_suppress[$key] = false;
 157              $this->headers[] = $label;
 158          }
 159          if ($columnclass !== null) {
 160              $this->column_class($key, $columnclass);
 161          }
 162          if (!$sortable) {
 163              $this->no_sorting($key);
 164          }
 165      }
 166  
 167      /**
 168       * Helper configuration method.
 169       */
 170      protected function configure_for_single_version() {
 171          $userfieldsmod = get_all_user_name_fields(true, 'm', null, 'mod');
 172          $v = key($this->versionids);
 173          $this->sql->fields .= ", $userfieldsmod, a{$v}.status AS status{$v}, a{$v}.note, ".
 174             "a{$v}.timemodified, a{$v}.usermodified AS usermodified{$v}";
 175  
 176          $join = "JOIN {tool_policy_acceptances} a{$v} ON a{$v}.userid = u.id AND a{$v}.policyversionid=:versionid{$v}";
 177          $filterstatus = $this->acceptancesfilter->get_status_filter();
 178          if ($filterstatus == 1) {
 179              $this->sql->from .= " $join AND a{$v}.status=1";
 180          } else if ($filterstatus == 2) {
 181              $this->sql->from .= " $join AND a{$v}.status=0";
 182          } else {
 183              $this->sql->from .= " LEFT $join";
 184          }
 185  
 186          $this->sql->from .= " LEFT JOIN {user} m ON m.id = a{$v}.usermodified AND m.id <> u.id AND a{$v}.status IS NOT NULL";
 187  
 188          $this->sql->params['versionid' . $v] = $v;
 189  
 190          if ($filterstatus === 0) {
 191              $this->sql->where .= " AND a{$v}.status IS NULL";
 192          }
 193  
 194          $this->add_column_header('status' . $v, get_string('response', 'tool_policy'));
 195          $this->add_column_header('timemodified', get_string('responseon', 'tool_policy'));
 196          $this->add_column_header('usermodified' . $v, get_string('responseby', 'tool_policy'));
 197          $this->add_column_header('note', get_string('acceptancenote', 'tool_policy'), false);
 198      }
 199  
 200      /**
 201       * Helper configuration method.
 202       */
 203      protected function configure_for_multiple_versions() {
 204          $this->add_column_header('statusall', get_string('acceptancestatusoverall', 'tool_policy'));
 205          $filterstatus = $this->acceptancesfilter->get_status_filter();
 206          $statusall = [];
 207          foreach ($this->versionids as $v => $versionname) {
 208              $this->sql->fields .= ", a{$v}.status AS status{$v}, a{$v}.usermodified AS usermodified{$v}";
 209              $join = "JOIN {tool_policy_acceptances} a{$v} ON a{$v}.userid = u.id AND a{$v}.policyversionid=:versionid{$v}";
 210              if ($filterstatus == 1) {
 211                  $this->sql->from .= " {$join} AND a{$v}.status=1";
 212              } else if ($filterstatus == 2) {
 213                  $this->sql->from .= " {$join} AND a{$v}.status=0";
 214              } else {
 215                  $this->sql->from .= " LEFT {$join}";
 216              }
 217              $this->sql->params['versionid' . $v] = $v;
 218              $this->add_column_header('status' . $v, $versionname);
 219              $statusall[] = "COALESCE(a{$v}.status, 0)";
 220          }
 221          $this->sql->fields .= ",".join('+', $statusall)." AS statusall";
 222  
 223          if ($filterstatus === 0) {
 224              $statussql = [];
 225              foreach ($this->versionids as $v => $versionname) {
 226                  $statussql[] = "a{$v}.status IS NULL";
 227              }
 228              $this->sql->where .= " AND (u.policyagreed = 0 OR ".join(" OR ", $statussql).")";
 229          }
 230      }
 231  
 232      /**
 233       * Download the data.
 234       */
 235      public function download() {
 236          \core\session\manager::write_close();
 237          $this->out(0, false);
 238          exit;
 239      }
 240  
 241      /**
 242       * Get sql to add to where statement.
 243       *
 244       * @return string
 245       */
 246      public function get_sql_where() {
 247          list($where, $params) = parent::get_sql_where();
 248          $where = preg_replace('/firstname/', 'u.firstname', $where);
 249          $where = preg_replace('/lastname/', 'u.lastname', $where);
 250          return [$where, $params];
 251      }
 252  
 253      /**
 254       * Helper SQL query builder.
 255       *
 256       * @param array $userfields
 257       */
 258      protected function build_sql_for_search_string($userfields) {
 259          global $DB, $USER;
 260  
 261          $search = $this->acceptancesfilter->get_search_strings();
 262          if (empty($search)) {
 263              return;
 264          }
 265  
 266          $wheres = [];
 267          $params = [];
 268          foreach ($search as $index => $keyword) {
 269              $searchkey1 = 'search' . $index . '1';
 270              $searchkey2 = 'search' . $index . '2';
 271              $searchkey3 = 'search' . $index . '3';
 272              $searchkey4 = 'search' . $index . '4';
 273              $searchkey5 = 'search' . $index . '5';
 274              $searchkey6 = 'search' . $index . '6';
 275              $searchkey7 = 'search' . $index . '7';
 276  
 277              $conditions = array();
 278              // Search by fullname.
 279              $fullname = $DB->sql_fullname('u.firstname', 'u.lastname');
 280              $conditions[] = $DB->sql_like($fullname, ':' . $searchkey1, false, false);
 281  
 282              // Search by email.
 283              $email = $DB->sql_like('u.email', ':' . $searchkey2, false, false);
 284              if (!in_array('email', $userfields)) {
 285                  $maildisplay = 'maildisplay' . $index;
 286                  $userid1 = 'userid' . $index . '1';
 287                  // Prevent users who hide their email address from being found by others
 288                  // who aren't allowed to see hidden email addresses.
 289                  $email = "(". $email ." AND (" .
 290                      "u.maildisplay <> :$maildisplay " .
 291                      "OR u.id = :$userid1". // User can always find himself.
 292                      "))";
 293                  $params[$maildisplay] = core_user::MAILDISPLAY_HIDE;
 294                  $params[$userid1] = $USER->id;
 295              }
 296              $conditions[] = $email;
 297  
 298              // Search by idnumber.
 299              $idnumber = $DB->sql_like('u.idnumber', ':' . $searchkey3, false, false);
 300              if (!in_array('idnumber', $userfields)) {
 301                  $userid2 = 'userid' . $index . '2';
 302                  // Users who aren't allowed to see idnumbers should at most find themselves
 303                  // when searching for an idnumber.
 304                  $idnumber = "(". $idnumber . " AND u.id = :$userid2)";
 305                  $params[$userid2] = $USER->id;
 306              }
 307              $conditions[] = $idnumber;
 308  
 309              // Search by middlename.
 310              $middlename = $DB->sql_like('u.middlename', ':' . $searchkey4, false, false);
 311              $conditions[] = $middlename;
 312  
 313              // Search by alternatename.
 314              $alternatename = $DB->sql_like('u.alternatename', ':' . $searchkey5, false, false);
 315              $conditions[] = $alternatename;
 316  
 317              // Search by firstnamephonetic.
 318              $firstnamephonetic = $DB->sql_like('u.firstnamephonetic', ':' . $searchkey6, false, false);
 319              $conditions[] = $firstnamephonetic;
 320  
 321              // Search by lastnamephonetic.
 322              $lastnamephonetic = $DB->sql_like('u.lastnamephonetic', ':' . $searchkey7, false, false);
 323              $conditions[] = $lastnamephonetic;
 324  
 325              $wheres[] = "(". implode(" OR ", $conditions) .") ";
 326              $params[$searchkey1] = "%$keyword%";
 327              $params[$searchkey2] = "%$keyword%";
 328              $params[$searchkey3] = "%$keyword%";
 329              $params[$searchkey4] = "%$keyword%";
 330              $params[$searchkey5] = "%$keyword%";
 331              $params[$searchkey6] = "%$keyword%";
 332              $params[$searchkey7] = "%$keyword%";
 333          }
 334  
 335          $this->sql->where .= ' AND '.join(' AND ', $wheres);
 336          $this->sql->params += $params;
 337      }
 338  
 339      /**
 340       * If there is a filter to find users who can/cannot accept on their own behalf add it to the SQL query
 341       */
 342      protected function build_sql_for_capability_filter() {
 343          global $CFG;
 344          $hascapability = $this->acceptancesfilter->get_capability_accept_filter();
 345          if ($hascapability === null) {
 346              return;
 347          }
 348  
 349          list($neededroles, $forbiddenroles) = get_roles_with_cap_in_context(\context_system::instance(), 'tool/policy:accept');
 350  
 351          if (empty($neededroles)) {
 352              // There are no roles that allow to accept agreement on one own's behalf.
 353              $this->sql->where .= $hascapability ? ' AND 1=0' : '';
 354              return;
 355          }
 356  
 357          if (empty($forbiddenroles)) {
 358              // There are no roles that prohibit to accept agreement on one own's behalf.
 359              $this->sql->where .= ' AND ' . $this->sql_has_role($neededroles, $hascapability);
 360              return;
 361          }
 362  
 363          $defaultuserroleid = isset($CFG->defaultuserroleid) ? $CFG->defaultuserroleid : 0;
 364          if (!empty($neededroles[$defaultuserroleid])) {
 365              // Default role allows to accept agreement. Make sure user has/does not have one of the roles prohibiting it.
 366              $this->sql->where .= ' AND ' . $this->sql_has_role($forbiddenroles, !$hascapability);
 367              return;
 368          }
 369  
 370          if ($hascapability) {
 371              // User has at least one role allowing to accept and no roles prohibiting.
 372              $this->sql->where .= ' AND ' . $this->sql_has_role($neededroles);
 373              $this->sql->where .= ' AND ' . $this->sql_has_role($forbiddenroles, false);
 374          } else {
 375              // Option 1: User has one of the roles prohibiting to accept.
 376              $this->sql->where .= ' AND (' . $this->sql_has_role($forbiddenroles);
 377              // Option 2: User has none of the roles allowing to accept.
 378              $this->sql->where .= ' OR ' . $this->sql_has_role($neededroles, false) . ")";
 379          }
 380      }
 381  
 382      /**
 383       * Returns SQL snippet for users that have (do not have) one of the given roles in the system context
 384       *
 385       * @param array $roles list of roles indexed by role id
 386       * @param bool $positive true: return users who HAVE roles; false: return users who DO NOT HAVE roles
 387       * @return string
 388       */
 389      protected function sql_has_role($roles, $positive = true) {
 390          global $CFG;
 391          if (empty($roles)) {
 392              return $positive ? '1=0' : '1=1';
 393          }
 394          $defaultuserroleid = isset($CFG->defaultuserroleid) ? $CFG->defaultuserroleid : 0;
 395          if (!empty($roles[$defaultuserroleid])) {
 396              // No need to query, everybody has the default role.
 397              return $positive ? '1=1' : '1=0';
 398          }
 399          return "u.id " . ($positive ? "" : "NOT") . " IN (
 400                  SELECT userid
 401                  FROM {role_assignments}
 402                  WHERE contextid = " . SYSCONTEXTID . " AND roleid IN (" . implode(',', array_keys($roles)) . ")
 403              )";
 404      }
 405  
 406      /**
 407       * If there is a filter by user roles add it to the SQL query.
 408       */
 409      protected function build_sql_for_roles_filter() {
 410          foreach ($this->acceptancesfilter->get_role_filters() as $roleid) {
 411              $this->sql->where .= ' AND ' . $this->sql_has_role([$roleid => $roleid]);
 412          }
 413      }
 414  
 415      /**
 416       * Hook that can be overridden in child classes to wrap a table in a form
 417       * for example. Called only when there is data to display and not
 418       * downloading.
 419       */
 420      public function wrap_html_start() {
 421          echo \html_writer::start_tag('form',
 422              ['action' => new \moodle_url('/admin/tool/policy/accept.php')]);
 423          echo \html_writer::empty_tag('input', ['type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()]);
 424          echo \html_writer::empty_tag('input', ['type' => 'hidden', 'name' => 'returnurl',
 425              'value' => $this->get_return_url()]);
 426          foreach (array_keys($this->versionids) as $versionid) {
 427              echo \html_writer::empty_tag('input', ['type' => 'hidden', 'name' => 'versionids[]',
 428                  'value' => $versionid]);
 429          }
 430      }
 431  
 432      /**
 433       * Hook that can be overridden in child classes to wrap a table in a form
 434       * for example. Called only when there is data to display and not
 435       * downloading.
 436       */
 437      public function wrap_html_finish() {
 438          global $PAGE;
 439          if ($this->canagreeany) {
 440              echo \html_writer::empty_tag('input', ['type' => 'hidden', 'name' => 'action', 'value' => 'accept']);
 441              echo \html_writer::empty_tag('input', ['type' => 'submit', 'data-action' => 'acceptmodal',
 442                  'value' => get_string('consentbulk', 'tool_policy'), 'class' => 'btn btn-primary mt-1']);
 443              $PAGE->requires->js_call_amd('tool_policy/acceptmodal', 'getInstance', [\context_system::instance()->id]);
 444          }
 445          echo "</form>\n";
 446      }
 447  
 448      /**
 449       * Render the table.
 450       */
 451      public function display() {
 452          $this->out(100, true);
 453      }
 454  
 455      /**
 456       * Call appropriate methods on this table class to perform any processing on values before displaying in table.
 457       * Takes raw data from the database and process it into human readable format, perhaps also adding html linking when
 458       * displaying table as html, adding a div wrap, etc.
 459       *
 460       * See for example col_fullname below which will be called for a column whose name is 'fullname'.
 461       *
 462       * @param array|object $row row of data from db used to make one row of the table.
 463       * @return array one row for the table, added using add_data_keyed method.
 464       */
 465      public function format_row($row) {
 466          \context_helper::preload_from_record($row);
 467          $row->canaccept = false;
 468          $row->user = \user_picture::unalias($row, [], $this->useridfield);
 469          $row->select = null;
 470          if (!$this->is_downloading()) {
 471              if (has_capability('tool/policy:acceptbehalf', \context_system::instance()) ||
 472                  has_capability('tool/policy:acceptbehalf', \context_user::instance($row->id))) {
 473                  $row->canaccept = true;
 474                  $row->select = \html_writer::empty_tag('input',
 475                      ['type' => 'checkbox', 'name' => 'userids[]', 'value' => $row->id, 'class' => 'usercheckbox',
 476                      'id' => 'selectuser' . $row->id]) .
 477                  \html_writer::tag('label', get_string('selectuser', 'tool_policy', $this->username($row->user, false)),
 478                      ['for' => 'selectuser' . $row->id, 'class' => 'accesshide']);
 479                  $this->canagreeany = true;
 480              }
 481          }
 482          return parent::format_row($row);
 483      }
 484  
 485      /**
 486       * Get the column fullname value.
 487       *
 488       * @param stdClass $row
 489       * @return string
 490       */
 491      public function col_fullname($row) {
 492          global $OUTPUT;
 493          $userpic = $this->is_downloading() ? '' : $OUTPUT->user_picture($row->user);
 494          return $userpic . $this->username($row->user, true);
 495      }
 496  
 497      /**
 498       * User name with a link to profile
 499       *
 500       * @param stdClass $user
 501       * @param bool $profilelink show link to profile (when we are downloading never show links)
 502       * @return string
 503       */
 504      protected function username($user, $profilelink = true) {
 505          $canviewfullnames = has_capability('moodle/site:viewfullnames', \context_system::instance()) ||
 506              has_capability('moodle/site:viewfullnames', \context_user::instance($user->id));
 507          $name = fullname($user, $canviewfullnames);
 508          if (!$this->is_downloading() && $profilelink) {
 509              $profileurl = new \moodle_url('/user/profile.php', array('id' => $user->id));
 510              return \html_writer::link($profileurl, $name);
 511          }
 512          return $name;
 513      }
 514  
 515      /**
 516       * Helper.
 517       */
 518      protected function get_return_url() {
 519          $pageurl = $this->baseurl;
 520          if ($this->currpage) {
 521              $pageurl = new \moodle_url($pageurl, [$this->request[TABLE_VAR_PAGE] => $this->currpage]);
 522          }
 523          return $pageurl;
 524      }
 525  
 526      /**
 527       * Return agreement status
 528       *
 529       * @param int $versionid either id of an individual version or empty for overall status
 530       * @param stdClass $row
 531       * @return string
 532       */
 533      protected function status($versionid, $row) {
 534          $onbehalf = false;
 535          $versions = $versionid ? [$versionid => $this->versionids[$versionid]] : $this->versionids; // List of versions.
 536          $accepted = []; // List of versionids that user has accepted.
 537          $declined = [];
 538  
 539          foreach ($versions as $v => $name) {
 540              if ($row->{'status' . $v} !== null) {
 541                  if (empty($row->{'status' . $v})) {
 542                      $declined[] = $v;
 543                  } else {
 544                      $accepted[] = $v;
 545                  }
 546                  $agreedby = $row->{'usermodified' . $v};
 547                  if ($agreedby && $agreedby != $row->id) {
 548                      $onbehalf = true;
 549                  }
 550              }
 551          }
 552  
 553          $ua = new user_agreement($row->id, $accepted, $declined, $this->get_return_url(), $versions, $onbehalf, $row->canaccept);
 554  
 555          if ($this->is_downloading()) {
 556              return $ua->export_for_download();
 557  
 558          } else {
 559              return $this->output->render($ua);
 560          }
 561      }
 562  
 563      /**
 564       * Get the column timemodified value.
 565       *
 566       * @param stdClass $row
 567       * @return string
 568       */
 569      public function col_timemodified($row) {
 570          if ($row->timemodified) {
 571              if ($this->is_downloading()) {
 572                  // Use timestamp format readable for both machines and humans.
 573                  return date_format_string($row->timemodified, '%Y-%m-%d %H:%M:%S %Z');
 574              } else {
 575                  // Use localised calendar format.
 576                  return userdate($row->timemodified, get_string('strftimedatetime'));
 577              }
 578          } else {
 579              return null;
 580          }
 581      }
 582  
 583      /**
 584       * Get the column note value.
 585       *
 586       * @param stdClass $row
 587       * @return string
 588       */
 589      public function col_note($row) {
 590          if ($this->is_downloading()) {
 591              return $row->note;
 592          } else {
 593              return format_text($row->note, FORMAT_MOODLE);
 594          }
 595      }
 596  
 597      /**
 598       * Get the column statusall value.
 599       *
 600       * @param stdClass $row
 601       * @return string
 602       */
 603      public function col_statusall($row) {
 604          return $this->status(0, $row);
 605      }
 606  
 607      /**
 608       * Generate the country column.
 609       *
 610       * @param \stdClass $data
 611       * @return string
 612       */
 613      public function col_country($data) {
 614          if ($data->country && $this->countries === null) {
 615              $this->countries = get_string_manager()->get_list_of_countries();
 616          }
 617          if (!empty($this->countries[$data->country])) {
 618              return $this->countries[$data->country];
 619          }
 620          return '';
 621      }
 622  
 623      /**
 624       * You can override this method in a child class. See the description of
 625       * build_table which calls this method.
 626       *
 627       * @param string $column
 628       * @param stdClass $row
 629       * @return string
 630       */
 631      public function other_cols($column, $row) {
 632          if (preg_match('/^status([\d]+)$/', $column, $matches)) {
 633              $versionid = $matches[1];
 634              return $this->status($versionid, $row);
 635          }
 636          if (preg_match('/^usermodified([\d]+)$/', $column, $matches)) {
 637              if ($row->$column && $row->$column != $row->id) {
 638                  $user = (object)['id' => $row->$column];
 639                  username_load_fields_from_object($user, $row, 'mod');
 640                  return $this->username($user, true);
 641              }
 642              return ''; // User agreed by themselves.
 643          }
 644          return parent::other_cols($column, $row);
 645      }
 646  }