mod/assign/gradingtable.php

   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  * This file contains the definition for the grading table which subclassses easy_table
  19  *
  20  * @package   mod_assign
  21  * @copyright 2012 NetSpot {@link http://www.netspot.com.au}
  22  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 defined('MOODLE_INTERNAL') || die();
  26
  27 require_once($CFG->libdir.'/tablelib.php');
  28 require_once($CFG->libdir.'/gradelib.php');
  29 require_once($CFG->dirroot.'/mod/assign/locallib.php');
  30
  31 /**
  32  * Extends table_sql to provide a table of assignment submissions
  33  *
  34  * @package   mod_assign
  35  * @copyright 2012 NetSpot {@link http://www.netspot.com.au}
  36  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  37  */
  38 class assign_grading_table extends table_sql implements renderable {
  39     /** @var assign $assignment */
  40     private $assignment = null;
  41     /** @var int $perpage */
  42     private $perpage = 10;
  43     /** @var int $rownum (global index of current row in table) */
  44     private $rownum = -1;
  45     /** @var renderer_base for getting output */
  46     private $output = null;
  47     /** @var stdClass gradinginfo */
  48     private $gradinginfo = null;
  49     /** @var int $tablemaxrows */
  50     private $tablemaxrows = 10000;
  51     /** @var boolean $quickgrading */
  52     private $quickgrading = false;
  53     /** @var boolean $hasgrantextension - Only do the capability check once for the entire table */
  54     private $hasgrantextension = false;
  55     /** @var array $groupsubmissions - A static cache of group submissions */
  56     private $groupsubmissions = array();
  57     /** @var array $submissiongroups - A static cache of submission groups */
  58     private $submissiongroups = array();
  59     /** @var string $plugingradingbatchoperations - List of plugin supported batch operations */
  60     public $plugingradingbatchoperations = array();
  61     /** @var array $plugincache - A cache of plugin lookups to match a column name to a plugin efficiently */
  62     private $plugincache = array();
  63     /** @var array $scale - A list of the keys and descriptions for the custom scale */
  64     private $scale = null;
  65
  66     /**
  67      * overridden constructor keeps a reference to the assignment class that is displaying this table
  68      *
  69      * @param assign $assignment The assignment class
  70      * @param int $perpage how many per page
  71      * @param string $filter The current filter
  72      * @param int $rowoffset For showing a subsequent page of results
  73      * @param bool $quickgrading Is this table wrapped in a quickgrading form?
  74      * @param string $downloadfilename
  75      */
  76     public function __construct(assign $assignment,
  77                                 $perpage,
  78                                 $filter,
  79                                 $rowoffset,
  80                                 $quickgrading,
  81                                 $downloadfilename = null) {
  82         global $CFG, $PAGE, $DB, $USER;
  83         parent::__construct('mod_assign_grading');
  84         $this->assignment = $assignment;
  85
  86         foreach ($assignment->get_feedback_plugins() as $plugin) {
  87             if ($plugin->is_visible() && $plugin->is_enabled()) {
  88                 foreach ($plugin->get_grading_batch_operations() as $action => $description) {
  89                     if (empty($this->plugingradingbatchoperations)) {
  90                         $this->plugingradingbatchoperations[$plugin->get_type()] = array();
  91                     }
  92                     $this->plugingradingbatchoperations[$plugin->get_type()][$action] = $description;
  93                 }
  94             }
  95         }
  96         $this->perpage = $perpage;
  97         $this->quickgrading = $quickgrading;
  98         $this->output = $PAGE->get_renderer('mod_assign');
  99
 100         $urlparams = array('action'=>'grading', 'id'=>$assignment->get_course_module()->id);
 101         $url = new moodle_url($CFG->wwwroot . '/mod/assign/view.php', $urlparams);
 102         $this->define_baseurl($url);
 103
 104         // Do some business - then set the sql.
 105         $currentgroup = groups_get_activity_group($assignment->get_course_module(), true);
 106
 107         if ($rowoffset) {
 108             $this->rownum = $rowoffset - 1;
 109         }
 110
 111         $users = array_keys( $assignment->list_participants($currentgroup, true));
 112         if (count($users) == 0) {
 113             // Insert a record that will never match to the sql is still valid.
 114             $users[] = -1;
 115         }
 116
 117         $params = array();
 118         $params['assignmentid1'] = (int)$this->assignment->get_instance()->id;
 119         $params['assignmentid2'] = (int)$this->assignment->get_instance()->id;
 120         $params['assignmentid3'] = (int)$this->assignment->get_instance()->id;
 121         $params['assignmentid4'] = (int)$this->assignment->get_instance()->id;
 122         $params['assignmentid5'] = (int)$this->assignment->get_instance()->id;
 123
 124         $extrauserfields = get_extra_user_fields($this->assignment->get_context());
 125
 126         $fields = user_picture::fields('u', $extrauserfields) . ', ';
 127         $fields .= 'u.id as userid, ';
 128         $fields .= 's.status as status, ';
 129         $fields .= 's.id as submissionid, ';
 130         $fields .= 's.timecreated as firstsubmission, ';
 131         $fields .= 's.timemodified as timesubmitted, ';
 132         $fields .= 's.attemptnumber as attemptnumber, ';
 133         $fields .= 'g.id as gradeid, ';
 134         $fields .= 'g.grade as grade, ';
 135         $fields .= 'g.timemodified as timemarked, ';
 136         $fields .= 'g.timecreated as firstmarked, ';
 137         $fields .= 'uf.mailed as mailed, ';
 138         $fields .= 'uf.locked as locked, ';
 139         $fields .= 'uf.extensionduedate as extensionduedate, ';
 140         $fields .= 'uf.workflowstate as workflowstate, ';
 141         $fields .= 'uf.allocatedmarker as allocatedmarker ';
 142
 143         $submissionmaxattempt = 'SELECT mxs.userid, MAX(mxs.attemptnumber) AS maxattempt
 144                                  FROM {assign_submission} mxs
 145                                  WHERE mxs.assignment = :assignmentid4 GROUP BY mxs.userid';
 146         $grademaxattempt = 'SELECT mxg.userid, MAX(mxg.attemptnumber) AS maxattempt
 147                             FROM {assign_grades} mxg
 148                             WHERE mxg.assignment = :assignmentid5 GROUP BY mxg.userid';
 149         $from = '{user} u
 150                          LEFT JOIN ( ' . $submissionmaxattempt . ' ) smx ON u.id = smx.userid
 151                          LEFT JOIN ( ' . $grademaxattempt . ' ) gmx ON u.id = gmx.userid
 152                          LEFT JOIN {assign_submission} s ON
 153                             u.id = s.userid AND
 154                             s.assignment = :assignmentid1 AND
 155                             s.attemptnumber = smx.maxattempt
 156                          LEFT JOIN {assign_grades} g ON
 157                             u.id = g.userid AND
 158                             g.assignment = :assignmentid2 AND
 159                             g.attemptnumber = gmx.maxattempt
 160                          LEFT JOIN {assign_user_flags} uf ON u.id = uf.userid AND uf.assignment = :assignmentid3';
 161
 162         $userparams = array();
 163         $userindex = 0;
 164
 165         list($userwhere, $userparams) = $DB->get_in_or_equal($users, SQL_PARAMS_NAMED, 'user');
 166         $where = 'u.id ' . $userwhere;
 167         $params = array_merge($params, $userparams);
 168
 169         // The filters do not make sense when there are no submissions, so do not apply them.
 170         if ($this->assignment->is_any_submission_plugin_enabled()) {
 171             if ($filter == ASSIGN_FILTER_SUBMITTED) {
 172                 $where .= ' AND (s.timemodified IS NOT NULL AND
 173                                  s.status = :submitted) ';
 174                 $params['submitted'] = ASSIGN_SUBMISSION_STATUS_SUBMITTED;
 175
 176             } else if ($filter == ASSIGN_FILTER_REQUIRE_GRADING) {
 177                 $where .= ' AND (s.timemodified IS NOT NULL AND
 178                                  s.status = :submitted AND
 179                                  (s.timemodified > g.timemodified OR g.timemodified IS NULL))';
 180                 $params['submitted'] = ASSIGN_SUBMISSION_STATUS_SUBMITTED;
 181
 182             } else if (strpos($filter, ASSIGN_FILTER_SINGLE_USER) === 0) {
 183                 $userfilter = (int) array_pop(explode('=', $filter));
 184                 $where .= ' AND (u.id = :userid)';
 185                 $params['userid'] = $userfilter;
 186             }
 187         }
 188
 189         if ($this->assignment->get_instance()->markingallocation) {
 190             if (has_capability('mod/assign:manageallocations', $this->assignment->get_context())) {
 191                 // Check to see if marker filter is set.
 192                 $markerfilter = (int)get_user_preferences('assign_markerfilter', '');
 193                 if (!empty($markerfilter)) {
 194                     $where .= ' AND uf.allocatedmarker = :markerid';
 195                     $params['markerid'] = $markerfilter;
 196                 }
 197             } else { // Only show users allocated to this marker.
 198                 $where .= ' AND uf.allocatedmarker = :markerid';
 199                 $params['markerid'] = $USER->id;
 200             }
 201         }
 202
 203         if ($this->assignment->get_instance()->markingworkflow) {
 204             $workflowstates = $this->assignment->get_marking_workflow_states_for_current_user();
 205             if (!empty($workflowstates)) {
 206                 $workflowfilter = get_user_preferences('assign_workflowfilter', '');
 207                 if ($workflowfilter == ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED) {
 208                     $where .= ' AND (uf.workflowstate = :workflowstate OR uf.workflowstate IS NULL OR '.
 209                         $DB->sql_isempty('assign_user_flags', 'workflowstate', true, true).')';
 210                     $params['workflowstate'] = $workflowfilter;
 211                 } else if (array_key_exists($workflowfilter, $workflowstates)) {
 212                     $where .= ' AND uf.workflowstate = :workflowstate';
 213                     $params['workflowstate'] = $workflowfilter;
 214                 }
 215             }
 216         }
 217
 218         $this->set_sql($fields, $from, $where, $params);
 219
 220         if ($downloadfilename) {
 221             $this->is_downloading('csv', $downloadfilename);
 222         }
 223
 224         $columns = array();
 225         $headers = array();
 226
 227         // Select.
 228         if (!$this->is_downloading()) {
 229             $columns[] = 'select';
 230             $headers[] = get_string('select') .
 231                     '<div class="selectall"><label class="accesshide" for="selectall">' . get_string('selectall') . '</label>
 232                     <input type="checkbox" id="selectall" name="selectall" title="' . get_string('selectall') . '"/></div>';
 233         }
 234
 235         // User picture.
 236         if (!$this->assignment->is_blind_marking()) {
 237             if (!$this->is_downloading()) {
 238                 $columns[] = 'picture';
 239                 $headers[] = get_string('pictureofuser');
 240             } else {
 241                 $columns[] = 'recordid';
 242                 $headers[] = get_string('recordid', 'assign');
 243             }
 244
 245             // Fullname.
 246             $columns[] = 'fullname';
 247             $headers[] = get_string('fullname');
 248
 249             foreach ($extrauserfields as $extrafield) {
 250                 $columns[] = $extrafield;
 251                 $headers[] = get_user_field_name($extrafield);
 252             }
 253         } else {
 254             // Record ID.
 255             $columns[] = 'recordid';
 256             $headers[] = get_string('recordid', 'assign');
 257         }
 258
 259         // Submission status.
 260         if ($assignment->is_any_submission_plugin_enabled()) {
 261             $columns[] = 'status';
 262             $headers[] = get_string('status', 'assign');
 263         } else if ($this->assignment->get_instance()->markingworkflow) {
 264             $columns[] = 'workflowstatus';
 265             $headers[] = get_string('status', 'assign');
 266         }
 267
 268         // Team submission columns.
 269         if ($assignment->get_instance()->teamsubmission) {
 270             $columns[] = 'team';
 271             $headers[] = get_string('submissionteam', 'assign');
 272
 273             $columns[] = 'teamstatus';
 274             $headers[] = get_string('teamsubmissionstatus', 'assign');
 275         }
 276         // Allocated marker.
 277         if ($this->assignment->get_instance()->markingallocation &&
 278             has_capability('mod/assign:manageallocations', $this->assignment->get_context())) {
 279             // Add a column for the allocated marker.
 280             $columns[] = 'allocatedmarker';
 281             $headers[] = get_string('marker', 'assign');
 282         }
 283         // Grade.
 284         $columns[] = 'grade';
 285         $headers[] = get_string('grade');
 286         if ($this->is_downloading()) {
 287             if ($this->assignment->get_instance()->grade >= 0) {
 288                 $columns[] = 'grademax';
 289                 $headers[] = get_string('maxgrade', 'assign');
 290             } else {
 291                 // This is a custom scale.
 292                 $columns[] = 'scale';
 293                 $headers[] = get_string('scale', 'assign');
 294             }
 295
 296             if ($this->assignment->get_instance()->markingworkflow) {
 297                 // Add a column for the marking workflow state.
 298                 $columns[] = 'workflowstate';
 299                 $headers[] = get_string('markingworkflowstate', 'assign');
 300             }
 301             // Add a column for the list of valid marking workflow states.
 302             $columns[] = 'gradecanbechanged';
 303             $headers[] = get_string('gradecanbechanged', 'assign');
 304         }
 305         if (!$this->is_downloading()) {
 306             // We have to call this column userid so we can use userid as a default sortable column.
 307             $columns[] = 'userid';
 308             $headers[] = get_string('edit');
 309         }
 310
 311         // Submission plugins.
 312         if ($assignment->is_any_submission_plugin_enabled()) {
 313             $columns[] = 'timesubmitted';
 314             $headers[] = get_string('lastmodifiedsubmission', 'assign');
 315
 316             foreach ($this->assignment->get_submission_plugins() as $plugin) {
 317                 if ($this->is_downloading()) {
 318                     if ($plugin->is_visible() && $plugin->is_enabled()) {
 319                         foreach ($plugin->get_editor_fields() as $field => $description) {
 320                             $index = 'plugin' . count($this->plugincache);
 321                             $this->plugincache[$index] = array($plugin, $field);
 322                             $columns[] = $index;
 323                             $headers[] = $plugin->get_name();
 324                         }
 325                     }
 326                 } else {
 327                     if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 328                         $index = 'plugin' . count($this->plugincache);
 329                         $this->plugincache[$index] = array($plugin);
 330                         $columns[] = $index;
 331                         $headers[] = $plugin->get_name();
 332                     }
 333                 }
 334             }
 335         }
 336
 337         // Time marked.
 338         $columns[] = 'timemarked';
 339         $headers[] = get_string('lastmodifiedgrade', 'assign');
 340
 341         // Feedback plugins.
 342         foreach ($this->assignment->get_feedback_plugins() as $plugin) {
 343             if ($this->is_downloading()) {
 344                 if ($plugin->is_visible() && $plugin->is_enabled()) {
 345                     foreach ($plugin->get_editor_fields() as $field => $description) {
 346                         $index = 'plugin' . count($this->plugincache);
 347                         $this->plugincache[$index] = array($plugin, $field);
 348                         $columns[] = $index;
 349                         $headers[] = $description;
 350                     }
 351                 }
 352             } else if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 353                 $index = 'plugin' . count($this->plugincache);
 354                 $this->plugincache[$index] = array($plugin);
 355                 $columns[] = $index;
 356                 $headers[] = $plugin->get_name();
 357             }
 358         }
 359
 360         // Exclude 'Final grade' column in downloaded grading worksheets.
 361         if (!$this->is_downloading()) {
 362             // Final grade.
 363             $columns[] = 'finalgrade';
 364             $headers[] = get_string('finalgrade', 'grades');
 365         }
 366
 367         // Load the grading info for all users.
 368         $this->gradinginfo = grade_get_grades($this->assignment->get_course()->id,
 369                                               'mod',
 370                                               'assign',
 371                                               $this->assignment->get_instance()->id,
 372                                               $users);
 373         $this->hasgrantextension = has_capability('mod/assign:grantextension',
 374                                                   $this->assignment->get_context());
 375
 376         if (!empty($CFG->enableoutcomes) && !empty($this->gradinginfo->outcomes)) {
 377             $columns[] = 'outcomes';
 378             $headers[] = get_string('outcomes', 'grades');
 379         }
 380
 381         // Set the columns.
 382         $this->define_columns($columns);
 383         $this->define_headers($headers);
 384         foreach ($extrauserfields as $extrafield) {
 385              $this->column_class($extrafield, $extrafield);
 386         }
 387         // We require at least one unique column for the sort.
 388         $this->sortable(true, 'userid');
 389         $this->no_sorting('recordid');
 390         $this->no_sorting('finalgrade');
 391         $this->no_sorting('userid');
 392         $this->no_sorting('select');
 393         $this->no_sorting('outcomes');
 394
 395         if ($assignment->get_instance()->teamsubmission) {
 396             $this->no_sorting('team');
 397             $this->no_sorting('teamstatus');
 398         }
 399
 400         $plugincolumnindex = 0;
 401         foreach ($this->assignment->get_submission_plugins() as $plugin) {
 402             if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 403                 $submissionpluginindex = 'plugin' . $plugincolumnindex++;
 404                 $this->no_sorting($submissionpluginindex);
 405             }
 406         }
 407         foreach ($this->assignment->get_feedback_plugins() as $plugin) {
 408             if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 409                 $feedbackpluginindex = 'plugin' . $plugincolumnindex++;
 410                 $this->no_sorting($feedbackpluginindex);
 411             }
 412         }
 413
 414         // When there is no data we still want the column headers printed in the csv file.
 415         if ($this->is_downloading()) {
 416             $this->start_output();
 417         }
 418     }
 419
 420     /**
 421      * Before adding each row to the table make sure rownum is incremented.
 422      *
 423      * @param array $row row of data from db used to make one row of the table.
 424      * @return array one row for the table
 425      */
 426     public function format_row($row) {
 427         if ($this->rownum < 0) {
 428             $this->rownum = $this->currpage * $this->pagesize;
 429         } else {
 430             $this->rownum += 1;
 431         }
 432
 433         return parent::format_row($row);
 434     }
 435
 436     /**
 437      * Add a column with an ID that uniquely identifies this user in this assignment.
 438      *
 439      * @param stdClass $row
 440      * @return string
 441      */
 442     public function col_recordid(stdClass $row) {
 443         return get_string('hiddenuser', 'assign') .
 444                $this->assignment->get_uniqueid_for_user($row->userid);
 445     }
 446
 447
 448     /**
 449      * Add the userid to the row class so it can be updated via ajax.
 450      *
 451      * @param stdClass $row The row of data
 452      * @return string The row class
 453      */
 454     public function get_row_class($row) {
 455         return 'user' . $row->userid;
 456     }
 457
 458     /**
 459      * Return the number of rows to display on a single page.
 460      *
 461      * @return int The number of rows per page
 462      */
 463     public function get_rows_per_page() {
 464         return $this->perpage;
 465     }
 466
 467     /**
 468      * list current marking workflow state
 469      *
 470      * @param stdClass $row
 471      * @return string
 472      */
 473     public function col_workflowstatus(stdClass $row) {
 474         $o = '';
 475
 476         $gradingdisabled = $this->assignment->grading_disabled($row->id);
 477         if ($this->assignment->get_instance()->markingworkflow) {
 478             // The function in the assignment keeps a static cache of this list of states.
 479             $workflowstates = $this->assignment->get_marking_workflow_states_for_current_user();
 480             $workflowstate = $row->workflowstate;
 481             if (empty($workflowstate)) {
 482                 $workflowstate = ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED;
 483             }
 484             if ($this->quickgrading && !$gradingdisabled) {
 485                 $notmarked = get_string('markingworkflowstatenotmarked', 'assign');
 486                 $name = 'quickgrade_' . $row->id . '_workflowstate';
 487                 $o .= html_writer::select($workflowstates, $name, $workflowstate, array('' => $notmarked));
 488                 // Check if this user is a marker that can't manage allocations and doesn't have the marker column added.
 489                 if ($this->assignment->get_instance()->markingallocation &&
 490                     !has_capability('mod/assign:manageallocations', $this->assignment->get_context())) {
 491
 492                     $name = 'quickgrade_' . $row->id . '_allocatedmarker';
 493                     $o .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$name, 'value'=>$row->allocatedmarker));
 494                 }
 495             } else {
 496                 $o .= $this->output->container(get_string('markingworkflowstate' . $workflowstate, 'assign'), $workflowstate);
 497             }
 498         }
 499         return $o;
 500     }
 501
 502     /**
 503      * For download only - list current marking workflow state
 504      *
 505      * @param stdClass $row - The row of data
 506      * @return string The current marking workflow state
 507      */
 508     public function col_workflowstate($row) {
 509         $state = $row->workflowstate;
 510         if (empty($state)) {
 511             $state = ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED;
 512         }
 513
 514         return get_string('markingworkflowstate' . $state, 'assign');
 515     }
 516
 517     /**
 518      * list current marker
 519      *
 520      * @param stdClass $row - The row of data
 521      * @return id the user->id of the marker.
 522      */
 523     public function col_allocatedmarker(stdClass $row) {
 524         static $markers = null;
 525         static $markerlist = array();
 526         if ($markers === null) {
 527             $markers = get_users_by_capability($this->assignment->get_context(), 'mod/assign:grade');
 528             $markerlist[0] = get_string('choosemarker', 'assign');
 529             foreach ($markers as $marker) {
 530                 $markerlist[$marker->id] = fullname($marker);
 531             }
 532         }
 533         if (empty($markerlist)) {
 534             // TODO: add some form of notification here that no markers are available.
 535             return '';
 536         }
 537         if ($this->is_downloading()) {
 538             return $markers[$row->allocatedmarker];
 539         }
 540
 541         if ($this->quickgrading && has_capability('mod/assign:manageallocations', $this->assignment->get_context()) &&
 542             (empty($row->workflowstate) ||
 543              $row->workflowstate == ASSIGN_MARKING_WORKFLOW_STATE_INMARKING ||
 544              $row->workflowstate == ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED)) {
 545
 546             $name = 'quickgrade_' . $row->id . '_allocatedmarker';
 547             return  html_writer::select($markerlist, $name, $row->allocatedmarker, false);
 548         } else if (!empty($row->allocatedmarker)) {
 549             $output = '';
 550             if ($this->quickgrading) { // Add hidden field for quickgrading page.
 551                 $name = 'quickgrade_' . $row->id . '_allocatedmarker';
 552                 $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$name, 'value'=>$row->allocatedmarker));
 553             }
 554             $output .= $markerlist[$row->allocatedmarker];
 555             return $output;
 556         }
 557     }
 558     /**
 559      * For download only - list all the valid options for this custom scale.
 560      *
 561      * @param stdClass $row - The row of data
 562      * @return string A list of valid options for the current scale
 563      */
 564     public function col_scale($row) {
 565         global $DB;
 566
 567         if (empty($this->scale)) {
 568             $dbparams = array('id'=>-($this->assignment->get_instance()->grade));
 569             $this->scale = $DB->get_record('scale', $dbparams);
 570         }
 571
 572         if (!empty($this->scale->scale)) {
 573             return implode("\n", explode(',', $this->scale->scale));
 574         }
 575         return '';
 576     }
 577
 578     /**
 579      * Display a grade with scales etc.
 580      *
 581      * @param string $grade
 582      * @param boolean $editable
 583      * @param int $userid The user id of the user this grade belongs to
 584      * @param int $modified Timestamp showing when the grade was last modified
 585      * @return string The formatted grade
 586      */
 587     public function display_grade($grade, $editable, $userid, $modified) {
 588         if ($this->is_downloading()) {
 589             if ($this->assignment->get_instance()->grade >= 0) {
 590                 if ($grade == -1 || $grade === null) {
 591                     return '';
 592                 }
 593                 return format_float($grade, 2);
 594             } else {
 595                 // This is a custom scale.
 596                 $scale = $this->assignment->display_grade($grade, false);
 597                 if ($scale == '-') {
 598                     $scale = '';
 599                 }
 600                 return $scale;
 601             }
 602         }
 603         return $this->assignment->display_grade($grade, $editable, $userid, $modified);
 604     }
 605
 606     /**
 607      * Get the team info for this user.
 608      *
 609      * @param stdClass $row
 610      * @return string The team name
 611      */
 612     public function col_team(stdClass $row) {
 613         $submission = false;
 614         $group = false;
 615         $this->get_group_and_submission($row->id, $group, $submission, -1);
 616         if ($group) {
 617             return $group->name;
 618         }
 619         return get_string('defaultteam', 'assign');
 620     }
 621
 622     /**
 623      * Use a static cache to try and reduce DB calls.
 624      *
 625      * @param int $userid The user id for this submission
 626      * @param int $group The groupid (returned)
 627      * @param stdClass|false $submission The stdClass submission or false (returned)
 628      * @param int $attemptnumber Return a specific attempt number (-1 for latest)
 629      */
 630     protected function get_group_and_submission($userid, &$group, &$submission, $attemptnumber) {
 631         $group = false;
 632         if (isset($this->submissiongroups[$userid])) {
 633             $group = $this->submissiongroups[$userid];
 634         } else {
 635             $group = $this->assignment->get_submission_group($userid, false);
 636             $this->submissiongroups[$userid] = $group;
 637         }
 638
 639         $groupid = 0;
 640         if ($group) {
 641             $groupid = $group->id;
 642         }
 643
 644         // Static cache is keyed by groupid and attemptnumber.
 645         // We may need both the latest and previous attempt in the same page.
 646         if (isset($this->groupsubmissions[$groupid . ':' . $attemptnumber])) {
 647             $submission = $this->groupsubmissions[$groupid . ':' . $attemptnumber];
 648         } else {
 649             $submission = $this->assignment->get_group_submission($userid, $groupid, false, $attemptnumber);
 650             $this->groupsubmissions[$groupid . ':' . $attemptnumber] = $submission;
 651         }
 652     }
 653
 654
 655     /**
 656      * Get the team status for this user.
 657      *
 658      * @param stdClass $row
 659      * @return string The team name
 660      */
 661     public function col_teamstatus(stdClass $row) {
 662         $submission = false;
 663         $group = false;
 664         $this->get_group_and_submission($row->id, $group, $submission, -1);
 665
 666         $status = '';
 667         if ($submission) {
 668             $status = $submission->status;
 669         }
 670         return get_string('submissionstatus_' . $status, 'assign');
 671     }
 672
 673
 674     /**
 675      * Format a list of outcomes.
 676      *
 677      * @param stdClass $row
 678      * @return string
 679      */
 680     public function col_outcomes(stdClass $row) {
 681         $outcomes = '';
 682         foreach ($this->gradinginfo->outcomes as $index => $outcome) {
 683             $options = make_grades_menu(-$outcome->scaleid);
 684
 685             $options[0] = get_string('nooutcome', 'grades');
 686             if ($this->quickgrading && !($outcome->grades[$row->userid]->locked)) {
 687                 $select = '<select name="outcome_' . $index . '_' . $row->userid . '" class="quickgrade">';
 688                 foreach ($options as $optionindex => $optionvalue) {
 689                     $selected = '';
 690                     if ($outcome->grades[$row->userid]->grade == $optionindex) {
 691                         $selected = 'selected="selected"';
 692                     }
 693                     $select .= '<option value="' . $optionindex . '"' . $selected . '>' . $optionvalue . '</option>';
 694                 }
 695                 $select .= '</select>';
 696                 $outcomes .= $this->output->container($outcome->name . ': ' . $select, 'outcome');
 697             } else {
 698                 $name = $outcome->name . ': ' . $options[$outcome->grades[$row->userid]->grade];
 699                 $outcomes .= $this->output->container($name, 'outcome');
 700             }
 701         }
 702
 703         return $outcomes;
 704     }
 705
 706
 707     /**
 708      * Format a user picture for display.
 709      *
 710      * @param stdClass $row
 711      * @return string
 712      */
 713     public function col_picture(stdClass $row) {
 714         if ($row->picture) {
 715             return $this->output->user_picture($row);
 716         }
 717         return '';
 718     }
 719
 720     /**
 721      * Format a user record for display (link to profile).
 722      *
 723      * @param stdClass $row
 724      * @return string
 725      */
 726     public function col_fullname($row) {
 727         if (!$this->is_downloading()) {
 728             $courseid = $this->assignment->get_course()->id;
 729             $link= new moodle_url('/user/view.php', array('id' =>$row->id, 'course'=>$courseid));
 730             $fullname = $this->output->action_link($link, fullname($row));
 731         } else {
 732             $fullname = fullname($row);
 733         }
 734
 735         if (!$this->assignment->is_active_user($row->id)) {
 736             $suspendedstring = get_string('userenrolmentsuspended', 'grades');
 737             $fullname .= ' ' . html_writer::empty_tag('img', array('src' => $this->output->pix_url('i/enrolmentsuspended'),
 738                 'title' => $suspendedstring, 'alt' => $suspendedstring, 'class' => 'usersuspendedicon'));
 739             $fullname = html_writer::tag('span', $fullname, array('class' => 'usersuspended'));
 740         }
 741         return $fullname;
 742     }
 743
 744     /**
 745      * Insert a checkbox for selecting the current row for batch operations.
 746      *
 747      * @param stdClass $row
 748      * @return string
 749      */
 750     public function col_select(stdClass $row) {
 751         $selectcol = '<label class="accesshide" for="selectuser_' . $row->userid . '">';
 752         $selectcol .= get_string('selectuser', 'assign', fullname($row));
 753         $selectcol .= '</label>';
 754         $selectcol .= '<input type="checkbox"
 755                               id="selectuser_' . $row->userid . '"
 756                               name="selectedusers"
 757                               value="' . $row->userid . '"/>';
 758         return $selectcol;
 759     }
 760
 761     /**
 762      * Return a users grades from the listing of all grade data for this assignment.
 763      *
 764      * @param int $userid
 765      * @return mixed stdClass or false
 766      */
 767     private function get_gradebook_data_for_user($userid) {
 768         if (isset($this->gradinginfo->items[0]) && $this->gradinginfo->items[0]->grades[$userid]) {
 769             return $this->gradinginfo->items[0]->grades[$userid];
 770         }
 771         return false;
 772     }
 773
 774     /**
 775      * Format a column of data for display.
 776      *
 777      * @param stdClass $row
 778      * @return string
 779      */
 780     public function col_gradecanbechanged(stdClass $row) {
 781         $gradingdisabled = $this->assignment->grading_disabled($row->id);
 782         if ($gradingdisabled) {
 783             return get_string('no');
 784         } else {
 785             return get_string('yes');
 786         }
 787     }
 788
 789     /**
 790      * Format a column of data for display
 791      *
 792      * @param stdClass $row
 793      * @return string
 794      */
 795     public function col_grademax(stdClass $row) {
 796         return format_float($this->assignment->get_instance()->grade, 2);
 797     }
 798
 799     /**
 800      * Format a column of data for display.
 801      *
 802      * @param stdClass $row
 803      * @return string
 804      */
 805     public function col_grade(stdClass $row) {
 806         $o = '';
 807
 808         $link = '';
 809         $separator = $this->output->spacer(array(), true);
 810         $grade = '';
 811         $gradingdisabled = $this->assignment->grading_disabled($row->id);
 812
 813         if (!$this->is_downloading()) {
 814             $name = fullname($row);
 815             if ($this->assignment->is_blind_marking()) {
 816                 $name = get_string('hiddenuser', 'assign') .
 817                         $this->assignment->get_uniqueid_for_user($row->userid);
 818             }
 819             $icon = $this->output->pix_icon('gradefeedback',
 820                                             get_string('gradeuser', 'assign', $name),
 821                                             'mod_assign');
 822             $urlparams = array('id' => $this->assignment->get_course_module()->id,
 823                                'rownum'=>$this->rownum,
 824                                'action'=>'grade');
 825             $url = new moodle_url('/mod/assign/view.php', $urlparams);
 826             $link = $this->output->action_link($url, $icon);
 827             $grade .= $link . $separator;
 828         }
 829
 830         $grade .= $this->display_grade($row->grade,
 831                                        $this->quickgrading && !$gradingdisabled,
 832                                        $row->userid,
 833                                        $row->timemarked);
 834
 835         return $grade;
 836     }
 837
 838     /**
 839      * Format a column of data for display.
 840      *
 841      * @param stdClass $row
 842      * @return string
 843      */
 844     public function col_finalgrade(stdClass $row) {
 845         $o = '';
 846
 847         $grade = $this->get_gradebook_data_for_user($row->userid);
 848         if ($grade) {
 849             $o = $this->display_grade($grade->grade, false, $row->userid, $row->timemarked);
 850         }
 851
 852         return $o;
 853     }
 854
 855     /**
 856      * Format a column of data for display.
 857      *
 858      * @param stdClass $row
 859      * @return string
 860      */
 861     public function col_timemarked(stdClass $row) {
 862         $o = '-';
 863
 864         if ($row->timemarked && $row->grade !== null && $row->grade >= 0) {
 865             $o = userdate($row->timemarked);
 866         }
 867         if ($row->timemarked && $this->is_downloading()) {
 868             // Force it for downloads as it affects import.
 869             $o = userdate($row->timemarked);
 870         }
 871
 872         return $o;
 873     }
 874
 875     /**
 876      * Format a column of data for display.
 877      *
 878      * @param stdClass $row
 879      * @return string
 880      */
 881     public function col_timesubmitted(stdClass $row) {
 882         $o = '-';
 883
 884         if ($row->timesubmitted) {
 885             $o = userdate($row->timesubmitted);
 886         }
 887
 888         return $o;
 889     }
 890
 891     /**
 892      * Format a column of data for display
 893      *
 894      * @param stdClass $row
 895      * @return string
 896      */
 897     public function col_status(stdClass $row) {
 898         $o = '';
 899
 900         $instance = $this->assignment->get_instance();
 901
 902         if ($this->assignment->is_any_submission_plugin_enabled()) {
 903
 904             $o .= $this->output->container(get_string('submissionstatus_' . $row->status, 'assign'),
 905                                            array('class'=>'submissionstatus' .$row->status));
 906             if ($instance->duedate &&
 907                     $row->timesubmitted > $instance->duedate) {
 908                 if (!$row->extensionduedate ||
 909                         $row->timesubmitted > $row->extensionduedate) {
 910                     $usertime = format_time($row->timesubmitted - $instance->duedate);
 911                     $latemessage = get_string('submittedlateshort',
 912                                               'assign',
 913                                               $usertime);
 914                     $o .= $this->output->container($latemessage, 'latesubmission');
 915                 }
 916             }
 917             if ($row->locked) {
 918                 $lockedstr = get_string('submissionslockedshort', 'assign');
 919                 $o .= $this->output->container($lockedstr, 'lockedsubmission');
 920             }
 921             $o .= $this->col_workflowstatus($row);
 922             if (!$row->timesubmitted) {
 923                 $now = time();
 924                 $due = $instance->duedate;
 925                 if ($row->extensionduedate) {
 926                     $due = $row->extensionduedate;
 927                 }
 928                 if ($due && ($now > $due)) {
 929                     $overduestr = get_string('overdue', 'assign', format_time($now - $due));
 930                     $o .= $this->output->container($overduestr, 'overduesubmission');
 931                 }
 932             }
 933             if ($row->extensionduedate) {
 934                 $userdate = userdate($row->extensionduedate);
 935                 $extensionstr = get_string('userextensiondate', 'assign', $userdate);
 936                 $o .= $this->output->container($extensionstr, 'extensiondate');
 937             }
 938         }
 939
 940         if ($this->is_downloading()) {
 941             $o = strip_tags(str_replace('</div>', "\n", $o));
 942         }
 943
 944         return $o;
 945     }
 946
 947     /**
 948      * Format a column of data for display.
 949      *
 950      * @param stdClass $row
 951      * @return string
 952      */
 953     public function col_userid(stdClass $row) {
 954         $edit = '';
 955
 956         $actions = array();
 957
 958         $urlparams = array('id'=>$this->assignment->get_course_module()->id,
 959                            'rownum'=>$this->rownum,
 960                            'action'=>'grade');
 961         $url = new moodle_url('/mod/assign/view.php', $urlparams);
 962
 963         if (!$row->grade) {
 964             $description = get_string('grade');
 965         } else {
 966             $description = get_string('updategrade', 'assign');
 967         }
 968         $actions[$url->out(false)] = $description;
 969
 970         // Hide for offline assignments.
 971         if ($this->assignment->is_any_submission_plugin_enabled()) {
 972             if (!$row->status ||
 973                     $row->status == ASSIGN_SUBMISSION_STATUS_DRAFT ||
 974                     !$this->assignment->get_instance()->submissiondrafts) {
 975
 976                 if (!$row->locked) {
 977                     $urlparams = array('id' => $this->assignment->get_course_module()->id,
 978                                        'userid'=>$row->id,
 979                                        'action'=>'lock',
 980                                        'sesskey'=>sesskey(),
 981                                        'page'=>$this->currpage);
 982                     $url = new moodle_url('/mod/assign/view.php', $urlparams);
 983
 984                     $description = get_string('preventsubmissionsshort', 'assign');
 985                     $actions[$url->out(false)] = $description;
 986                 } else {
 987                     $urlparams = array('id' => $this->assignment->get_course_module()->id,
 988                                        'userid'=>$row->id,
 989                                        'action'=>'unlock',
 990                                        'sesskey'=>sesskey(),
 991                                        'page'=>$this->currpage);
 992                     $url = new moodle_url('/mod/assign/view.php', $urlparams);
 993                     $description = get_string('allowsubmissionsshort', 'assign');
 994                     $actions[$url->out(false)] = $description;
 995                 }
 996             }
 997
 998             if (($this->assignment->get_instance()->duedate ||
 999                    $this->assignment->get_instance()->cutoffdate) &&
1000                    $this->hasgrantextension) {
1001                 $urlparams = array('id' => $this->assignment->get_course_module()->id,
1002                                    'userid'=>$row->id,
1003                                    'action'=>'grantextension',
1004                                    'sesskey'=>sesskey(),
1005                                    'page'=>$this->currpage);
1006                 $url = new moodle_url('/mod/assign/view.php', $urlparams);
1007                 $description = get_string('grantextension', 'assign');
1008                 $actions[$url->out(false)] = $description;
1009             }
1010         }
1011         if ($row->status == ASSIGN_SUBMISSION_STATUS_SUBMITTED &&
1012                 $this->assignment->get_instance()->submissiondrafts) {
1013             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1014                                'userid'=>$row->id,
1015                                'action'=>'reverttodraft',
1016                                'sesskey'=>sesskey(),
1017                                'page'=>$this->currpage);
1018             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1019             $description = get_string('reverttodraftshort', 'assign');
1020             $actions[$url->out(false)] = $description;
1021         }
1022
1023         $ismanual = $this->assignment->get_instance()->attemptreopenmethod == ASSIGN_ATTEMPT_REOPEN_METHOD_MANUAL;
1024         $hassubmission = !empty($row->status);
1025         $notreopened = $hassubmission && $row->status != ASSIGN_SUBMISSION_STATUS_REOPENED;
1026         $isunlimited = $this->assignment->get_instance()->maxattempts == ASSIGN_UNLIMITED_ATTEMPTS;
1027         $hasattempts = $isunlimited || $row->attemptnumber < $this->assignment->get_instance()->maxattempts - 1;
1028
1029         if ($ismanual && $hassubmission && $notreopened && $hasattempts) {
1030             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1031                                'userid'=>$row->id,
1032                                'action'=>'addattempt',
1033                                'sesskey'=>sesskey(),
1034                                'page'=>$this->currpage);
1035             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1036             $description = get_string('addattempt', 'assign');
1037             $actions[$url->out(false)] = $description;
1038         }
1039
1040         $edit .= $this->output->container_start(array('yui3-menu', 'actionmenu'), 'actionselect' . $row->id);
1041         $edit .= $this->output->container_start(array('yui3-menu-content'));
1042         $edit .= html_writer::start_tag('ul');
1043         $edit .= html_writer::start_tag('li', array('class'=>'menuicon'));
1044
1045         $menuicon = $this->output->pix_icon('t/contextmenu', get_string('actions'));
1046         $edit .= $this->output->action_link('#menu' . $row->id, $menuicon, null, array('class'=>'yui3-menu-label'));
1047         $edit .= $this->output->container_start(array('yui3-menu', 'yui3-loading'), 'menu' . $row->id);
1048         $edit .= $this->output->container_start(array('yui3-menu-content'));
1049         $edit .= html_writer::start_tag('ul');
1050
1051         foreach ($actions as $url => $description) {
1052             $edit .= html_writer::start_tag('li', array('class'=>'yui3-menuitem'));
1053
1054             $edit .= $this->output->action_link($url, $description, null, array('class'=>'yui3-menuitem-content'));
1055
1056             $edit .= html_writer::end_tag('li');
1057         }
1058         $edit .= html_writer::end_tag('ul');
1059         $edit .= $this->output->container_end();
1060         $edit .= $this->output->container_end();
1061         $edit .= html_writer::end_tag('li');
1062         $edit .= html_writer::end_tag('ul');
1063
1064         $edit .= $this->output->container_end();
1065         $edit .= $this->output->container_end();
1066
1067         return $edit;
1068     }
1069
1070     /**
1071      * Write the plugin summary with an optional link to view the full feedback/submission.
1072      *
1073      * @param assign_plugin $plugin Submission plugin or feedback plugin
1074      * @param stdClass $item Submission or grade
1075      * @param string $returnaction The return action to pass to the
1076      *                             view_submission page (the current page)
1077      * @param string $returnparams The return params to pass to the view_submission
1078      *                             page (the current page)
1079      * @return string The summary with an optional link
1080      */
1081     private function format_plugin_summary_with_link(assign_plugin $plugin,
1082                                                      stdClass $item,
1083                                                      $returnaction,
1084                                                      $returnparams) {
1085         $link = '';
1086         $showviewlink = false;
1087
1088         $summary = $plugin->view_summary($item, $showviewlink);
1089         $separator = '';
1090         if ($showviewlink) {
1091             $viewstr = get_string('view' . substr($plugin->get_subtype(), strlen('assign')), 'assign');
1092             $icon = $this->output->pix_icon('t/preview', $viewstr);
1093             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1094                                                      'sid'=>$item->id,
1095                                                      'gid'=>$item->id,
1096                                                      'plugin'=>$plugin->get_type(),
1097                                                      'action'=>'viewplugin' . $plugin->get_subtype(),
1098                                                      'returnaction'=>$returnaction,
1099                                                      'returnparams'=>http_build_query($returnparams));
1100             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1101             $link = $this->output->action_link($url, $icon);
1102             $separator = $this->output->spacer(array(), true);
1103         }
1104
1105         return $link . $separator . $summary;
1106     }
1107
1108
1109     /**
1110      * Format the submission and feedback columns.
1111      *
1112      * @param string $colname The column name
1113      * @param stdClass $row The submission row
1114      * @return mixed string or NULL
1115      */
1116     public function other_cols($colname, $row) {
1117         // For extra user fields the result is already in $row.
1118         if (empty($this->plugincache[$colname])) {
1119             return $row->$colname;
1120         }
1121
1122         // This must be a plugin field.
1123         $plugincache = $this->plugincache[$colname];
1124
1125         $plugin = $plugincache[0];
1126
1127         $field = null;
1128         if (isset($plugincache[1])) {
1129             $field = $plugincache[1];
1130         }
1131
1132         if ($plugin->is_visible() && $plugin->is_enabled()) {
1133             if ($plugin->get_subtype() == 'assignsubmission') {
1134                 if ($this->assignment->get_instance()->teamsubmission) {
1135                     $group = false;
1136                     $submission = false;
1137
1138                     $this->get_group_and_submission($row->id, $group, $submission, -1);
1139                     if ($submission) {
1140                         if ($submission->status == ASSIGN_SUBMISSION_STATUS_REOPENED) {
1141                             // For a newly reopened submission - we want to show the previous submission in the table.
1142                             $this->get_group_and_submission($row->id, $group, $submission, $submission->attemptnumber-1);
1143                         }
1144                         if (isset($field)) {
1145                             return $plugin->get_editor_text($field, $submission->id);
1146                         }
1147                         return $this->format_plugin_summary_with_link($plugin,
1148                                                                       $submission,
1149                                                                       'grading',
1150                                                                       array());
1151                     }
1152                 } else if ($row->submissionid) {
1153                     if ($row->status == ASSIGN_SUBMISSION_STATUS_REOPENED) {
1154                         // For a newly reopened submission - we want to show the previous submission in the table.
1155                         $submission = $this->assignment->get_user_submission($row->userid, false, $row->attemptnumber - 1);
1156                     } else {
1157                         $submission = new stdClass();
1158                         $submission->id = $row->submissionid;
1159                         $submission->timecreated = $row->firstsubmission;
1160                         $submission->timemodified = $row->timesubmitted;
1161                         $submission->assignment = $this->assignment->get_instance()->id;
1162                         $submission->userid = $row->userid;
1163                         $submission->attemptnumber = $row->attemptnumber;
1164                     }
1165                     // Field is used for only for import/export and refers the the fieldname for the text editor.
1166                     if (isset($field)) {
1167                         return $plugin->get_editor_text($field, $submission->id);
1168                     }
1169                     return $this->format_plugin_summary_with_link($plugin,
1170                                                                   $submission,
1171                                                                   'grading',
1172                                                                   array());
1173                 }
1174             } else {
1175                 $grade = null;
1176                 if (isset($field)) {
1177                     return $plugin->get_editor_text($field, $row->gradeid);
1178                 }
1179
1180                 if ($row->gradeid) {
1181                     $grade = new stdClass();
1182                     $grade->id = $row->gradeid;
1183                     $grade->timecreated = $row->firstmarked;
1184                     $grade->timemodified = $row->timemarked;
1185                     $grade->assignment = $this->assignment->get_instance()->id;
1186                     $grade->userid = $row->userid;
1187                     $grade->grade = $row->grade;
1188                     $grade->mailed = $row->mailed;
1189                     $grade->attemptnumber = $row->attemptnumber;
1190                 }
1191                 if ($this->quickgrading && $plugin->supports_quickgrading()) {
1192                     return $plugin->get_quickgrading_html($row->userid, $grade);
1193                 } else if ($grade) {
1194                     return $this->format_plugin_summary_with_link($plugin,
1195                                                                   $grade,
1196                                                                   'grading',
1197                                                                   array());
1198                 }
1199             }
1200         }
1201         return '';
1202     }
1203
1204     /**
1205      * Using the current filtering and sorting - load all rows and return a single column from them.
1206      *
1207      * @param string $columnname The name of the raw column data
1208      * @return array of data
1209      */
1210     public function get_column_data($columnname) {
1211         $this->setup();
1212         $this->currpage = 0;
1213         $this->query_db($this->tablemaxrows);
1214         $result = array();
1215         foreach ($this->rawdata as $row) {
1216             $result[] = $row->$columnname;
1217         }
1218         return $result;
1219     }
1220
1221     /**
1222      * Return things to the renderer.
1223      *
1224      * @return string the assignment name
1225      */
1226     public function get_assignment_name() {
1227         return $this->assignment->get_instance()->name;
1228     }
1229
1230     /**
1231      * Return things to the renderer.
1232      *
1233      * @return int the course module id
1234      */
1235     public function get_course_module_id() {
1236         return $this->assignment->get_course_module()->id;
1237     }
1238
1239     /**
1240      * Return things to the renderer.
1241      *
1242      * @return int the course id
1243      */
1244     public function get_course_id() {
1245         return $this->assignment->get_course()->id;
1246     }
1247
1248     /**
1249      * Return things to the renderer.
1250      *
1251      * @return stdClass The course context
1252      */
1253     public function get_course_context() {
1254         return $this->assignment->get_course_context();
1255     }
1256
1257     /**
1258      * Return things to the renderer.
1259      *
1260      * @return bool Does this assignment accept submissions
1261      */
1262     public function submissions_enabled() {
1263         return $this->assignment->is_any_submission_plugin_enabled();
1264     }
1265
1266     /**
1267      * Return things to the renderer.
1268      *
1269      * @return bool Can this user view all grades (the gradebook)
1270      */
1271     public function can_view_all_grades() {
1272         $context = $this->assignment->get_course_context();
1273         return has_capability('gradereport/grader:view', $context) &&
1274                has_capability('moodle/grade:viewall', $context);
1275     }
1276
1277     /**
1278      * Override the table show_hide_link to not show for select column.
1279      *
1280      * @param string $column the column name, index into various names.
1281      * @param int $index numerical index of the column.
1282      * @return string HTML fragment.
1283      */
1284     protected function show_hide_link($column, $index) {
1285         if ($index > 0) {
1286             return parent::show_hide_link($column, $index);
1287         }
1288         return '';
1289     }
1290 }