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 boolean $hasgrade - Only do the capability check once for the entire table */
  56     private $hasgrade = false;
  57     /** @var array $groupsubmissions - A static cache of group submissions */
  58     private $groupsubmissions = array();
  59     /** @var array $submissiongroups - A static cache of submission groups */
  60     private $submissiongroups = array();
  61     /** @var string $plugingradingbatchoperations - List of plugin supported batch operations */
  62     public $plugingradingbatchoperations = array();
  63     /** @var array $plugincache - A cache of plugin lookups to match a column name to a plugin efficiently */
  64     private $plugincache = array();
  65     /** @var array $scale - A list of the keys and descriptions for the custom scale */
  66     private $scale = null;
  67
  68     /**
  69      * overridden constructor keeps a reference to the assignment class that is displaying this table
  70      *
  71      * @param assign $assignment The assignment class
  72      * @param int $perpage how many per page
  73      * @param string $filter The current filter
  74      * @param int $rowoffset For showing a subsequent page of results
  75      * @param bool $quickgrading Is this table wrapped in a quickgrading form?
  76      * @param string $downloadfilename
  77      */
  78     public function __construct(assign $assignment,
  79                                 $perpage,
  80                                 $filter,
  81                                 $rowoffset,
  82                                 $quickgrading,
  83                                 $downloadfilename = null) {
  84         global $CFG, $PAGE, $DB, $USER;
  85         parent::__construct('mod_assign_grading');
  86         $this->assignment = $assignment;
  87
  88         // Check permissions up front.
  89         $this->hasgrantextension = has_capability('mod/assign:grantextension',
  90                                                   $this->assignment->get_context());
  91         $this->hasgrade = $this->assignment->can_grade();
  92
  93         // Check if we have the elevated view capablities to see the blind details.
  94         $this->hasviewblind = has_capability('mod/assign:viewblinddetails',
  95                 $this->assignment->get_context());
  96
  97         foreach ($assignment->get_feedback_plugins() as $plugin) {
  98             if ($plugin->is_visible() && $plugin->is_enabled()) {
  99                 foreach ($plugin->get_grading_batch_operations() as $action => $description) {
 100                     if (empty($this->plugingradingbatchoperations)) {
 101                         $this->plugingradingbatchoperations[$plugin->get_type()] = array();
 102                     }
 103                     $this->plugingradingbatchoperations[$plugin->get_type()][$action] = $description;
 104                 }
 105             }
 106         }
 107         $this->perpage = $perpage;
 108         $this->quickgrading = $quickgrading && $this->hasgrade;
 109         $this->output = $PAGE->get_renderer('mod_assign');
 110
 111         $urlparams = array('action'=>'grading', 'id'=>$assignment->get_course_module()->id);
 112         $url = new moodle_url($CFG->wwwroot . '/mod/assign/view.php', $urlparams);
 113         $this->define_baseurl($url);
 114
 115         // Do some business - then set the sql.
 116         $currentgroup = groups_get_activity_group($assignment->get_course_module(), true);
 117
 118         if ($rowoffset) {
 119             $this->rownum = $rowoffset - 1;
 120         }
 121
 122         $users = array_keys( $assignment->list_participants($currentgroup, true));
 123         if (count($users) == 0) {
 124             // Insert a record that will never match to the sql is still valid.
 125             $users[] = -1;
 126         }
 127
 128         $params = array();
 129         $params['assignmentid1'] = (int)$this->assignment->get_instance()->id;
 130         $params['assignmentid2'] = (int)$this->assignment->get_instance()->id;
 131         $params['assignmentid3'] = (int)$this->assignment->get_instance()->id;
 132
 133         $extrauserfields = get_extra_user_fields($this->assignment->get_context());
 134
 135         $fields = user_picture::fields('u', $extrauserfields) . ', ';
 136         $fields .= 'u.id as userid, ';
 137         $fields .= 's.status as status, ';
 138         $fields .= 's.id as submissionid, ';
 139         $fields .= 's.timecreated as firstsubmission, ';
 140         $fields .= 's.timemodified as timesubmitted, ';
 141         $fields .= 's.attemptnumber as attemptnumber, ';
 142         $fields .= 'g.id as gradeid, ';
 143         $fields .= 'g.grade as grade, ';
 144         $fields .= 'g.timemodified as timemarked, ';
 145         $fields .= 'g.timecreated as firstmarked, ';
 146         $fields .= 'uf.mailed as mailed, ';
 147         $fields .= 'uf.locked as locked, ';
 148         $fields .= 'uf.extensionduedate as extensionduedate, ';
 149         $fields .= 'uf.workflowstate as workflowstate, ';
 150         $fields .= 'uf.allocatedmarker as allocatedmarker ';
 151
 152         $from = '{user} u
 153                          LEFT JOIN {assign_submission} s ON
 154                             u.id = s.userid AND
 155                             s.assignment = :assignmentid1 AND
 156                             s.latest = 1
 157                          LEFT JOIN {assign_grades} g ON
 158                             u.id = g.userid AND
 159                             g.assignment = :assignmentid2 AND
 160                             g.attemptnumber = s.attemptnumber
 161                          LEFT JOIN {assign_user_flags} uf ON u.id = uf.userid AND uf.assignment = :assignmentid3';
 162
 163         $userparams = array();
 164         $userindex = 0;
 165
 166         list($userwhere, $userparams) = $DB->get_in_or_equal($users, SQL_PARAMS_NAMED, 'user');
 167         $where = 'u.id ' . $userwhere;
 168         $params = array_merge($params, $userparams);
 169
 170         // The filters do not make sense when there are no submissions, so do not apply them.
 171         if ($this->assignment->is_any_submission_plugin_enabled()) {
 172             if ($filter == ASSIGN_FILTER_SUBMITTED) {
 173                 $where .= ' AND (s.timemodified IS NOT NULL AND
 174                                  s.status = :submitted) ';
 175                 $params['submitted'] = ASSIGN_SUBMISSION_STATUS_SUBMITTED;
 176
 177             } else if ($filter == ASSIGN_FILTER_NOT_SUBMITTED) {
 178                 $where .= ' AND (s.timemodified IS NULL OR s.status != :submitted) ';
 179                 $params['submitted'] = ASSIGN_SUBMISSION_STATUS_SUBMITTED;
 180             } else if ($filter == ASSIGN_FILTER_REQUIRE_GRADING) {
 181                 $where .= ' AND (s.timemodified IS NOT NULL AND
 182                                  s.status = :submitted AND
 183                                  (s.timemodified > g.timemodified OR g.timemodified IS NULL))';
 184                 $params['submitted'] = ASSIGN_SUBMISSION_STATUS_SUBMITTED;
 185
 186             } else if (strpos($filter, ASSIGN_FILTER_SINGLE_USER) === 0) {
 187                 $userfilter = (int) array_pop(explode('=', $filter));
 188                 $where .= ' AND (u.id = :userid)';
 189                 $params['userid'] = $userfilter;
 190             }
 191         }
 192
 193         if ($this->assignment->get_instance()->markingworkflow &&
 194             $this->assignment->get_instance()->markingallocation) {
 195             if (has_capability('mod/assign:manageallocations', $this->assignment->get_context())) {
 196                 // Check to see if marker filter is set.
 197                 $markerfilter = (int)get_user_preferences('assign_markerfilter', '');
 198                 if (!empty($markerfilter)) {
 199                     if ($markerfilter == ASSIGN_MARKER_FILTER_NO_MARKER) {
 200                         $where .= ' AND (uf.allocatedmarker IS NULL OR uf.allocatedmarker = 0)';
 201                     } else {
 202                         $where .= ' AND uf.allocatedmarker = :markerid';
 203                         $params['markerid'] = $markerfilter;
 204                     }
 205                 }
 206             } else { // Only show users allocated to this marker.
 207                 $where .= ' AND uf.allocatedmarker = :markerid';
 208                 $params['markerid'] = $USER->id;
 209             }
 210         }
 211
 212         if ($this->assignment->get_instance()->markingworkflow) {
 213             $workflowstates = $this->assignment->get_marking_workflow_states_for_current_user();
 214             if (!empty($workflowstates)) {
 215                 $workflowfilter = get_user_preferences('assign_workflowfilter', '');
 216                 if ($workflowfilter == ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED) {
 217                     $where .= ' AND (uf.workflowstate = :workflowstate OR uf.workflowstate IS NULL OR '.
 218                         $DB->sql_isempty('assign_user_flags', 'workflowstate', true, true).')';
 219                     $params['workflowstate'] = $workflowfilter;
 220                 } else if (array_key_exists($workflowfilter, $workflowstates)) {
 221                     $where .= ' AND uf.workflowstate = :workflowstate';
 222                     $params['workflowstate'] = $workflowfilter;
 223                 }
 224             }
 225         }
 226
 227         $this->set_sql($fields, $from, $where, $params);
 228
 229         if ($downloadfilename) {
 230             $this->is_downloading('csv', $downloadfilename);
 231         }
 232
 233         $columns = array();
 234         $headers = array();
 235
 236         // Select.
 237         if (!$this->is_downloading() && $this->hasgrade) {
 238             $columns[] = 'select';
 239             $headers[] = get_string('select') .
 240                     '<div class="selectall"><label class="accesshide" for="selectall">' . get_string('selectall') . '</label>
 241                     <input type="checkbox" id="selectall" name="selectall" title="' . get_string('selectall') . '"/></div>';
 242         }
 243
 244         // User picture.
 245         if ($this->hasviewblind || !$this->assignment->is_blind_marking()) {
 246             if (!$this->is_downloading()) {
 247                 $columns[] = 'picture';
 248                 $headers[] = get_string('pictureofuser');
 249             } else {
 250                 $columns[] = 'recordid';
 251                 $headers[] = get_string('recordid', 'assign');
 252             }
 253
 254             // Fullname.
 255             $columns[] = 'fullname';
 256             $headers[] = get_string('fullname');
 257
 258             foreach ($extrauserfields as $extrafield) {
 259                 $columns[] = $extrafield;
 260                 $headers[] = get_user_field_name($extrafield);
 261             }
 262         } else {
 263             // Record ID.
 264             $columns[] = 'recordid';
 265             $headers[] = get_string('recordid', 'assign');
 266         }
 267
 268         if ($this->hasviewblind) {
 269                 $columns[] = 'recordid';
 270                 $headers[] = get_string('recordid', 'assign');
 271         }
 272
 273         // Submission status.
 274         if ($assignment->is_any_submission_plugin_enabled()) {
 275             $columns[] = 'status';
 276             $headers[] = get_string('status', 'assign');
 277         } else if ($this->assignment->get_instance()->markingworkflow) {
 278             $columns[] = 'workflowstatus';
 279             $headers[] = get_string('status', 'assign');
 280         }
 281
 282         // Team submission columns.
 283         if ($assignment->get_instance()->teamsubmission) {
 284             $columns[] = 'team';
 285             $headers[] = get_string('submissionteam', 'assign');
 286         }
 287         // Allocated marker.
 288         if ($this->assignment->get_instance()->markingworkflow &&
 289             $this->assignment->get_instance()->markingallocation &&
 290             has_capability('mod/assign:manageallocations', $this->assignment->get_context())) {
 291             // Add a column for the allocated marker.
 292             $columns[] = 'allocatedmarker';
 293             $headers[] = get_string('marker', 'assign');
 294         }
 295         // Grade.
 296         $columns[] = 'grade';
 297         $headers[] = get_string('grade');
 298         if ($this->is_downloading()) {
 299             if ($this->assignment->get_instance()->grade >= 0) {
 300                 $columns[] = 'grademax';
 301                 $headers[] = get_string('maxgrade', 'assign');
 302             } else {
 303                 // This is a custom scale.
 304                 $columns[] = 'scale';
 305                 $headers[] = get_string('scale', 'assign');
 306             }
 307
 308             if ($this->assignment->get_instance()->markingworkflow) {
 309                 // Add a column for the marking workflow state.
 310                 $columns[] = 'workflowstate';
 311                 $headers[] = get_string('markingworkflowstate', 'assign');
 312             }
 313             // Add a column for the list of valid marking workflow states.
 314             $columns[] = 'gradecanbechanged';
 315             $headers[] = get_string('gradecanbechanged', 'assign');
 316         }
 317         if (!$this->is_downloading() && $this->hasgrade) {
 318             // We have to call this column userid so we can use userid as a default sortable column.
 319             $columns[] = 'userid';
 320             $headers[] = get_string('edit');
 321         }
 322
 323         // Submission plugins.
 324         if ($assignment->is_any_submission_plugin_enabled()) {
 325             $columns[] = 'timesubmitted';
 326             $headers[] = get_string('lastmodifiedsubmission', 'assign');
 327
 328             foreach ($this->assignment->get_submission_plugins() as $plugin) {
 329                 if ($this->is_downloading()) {
 330                     if ($plugin->is_visible() && $plugin->is_enabled()) {
 331                         foreach ($plugin->get_editor_fields() as $field => $description) {
 332                             $index = 'plugin' . count($this->plugincache);
 333                             $this->plugincache[$index] = array($plugin, $field);
 334                             $columns[] = $index;
 335                             $headers[] = $plugin->get_name();
 336                         }
 337                     }
 338                 } else {
 339                     if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 340                         $index = 'plugin' . count($this->plugincache);
 341                         $this->plugincache[$index] = array($plugin);
 342                         $columns[] = $index;
 343                         $headers[] = $plugin->get_name();
 344                     }
 345                 }
 346             }
 347         }
 348
 349         // Time marked.
 350         $columns[] = 'timemarked';
 351         $headers[] = get_string('lastmodifiedgrade', 'assign');
 352
 353         // Feedback plugins.
 354         foreach ($this->assignment->get_feedback_plugins() as $plugin) {
 355             if ($this->is_downloading()) {
 356                 if ($plugin->is_visible() && $plugin->is_enabled()) {
 357                     foreach ($plugin->get_editor_fields() as $field => $description) {
 358                         $index = 'plugin' . count($this->plugincache);
 359                         $this->plugincache[$index] = array($plugin, $field);
 360                         $columns[] = $index;
 361                         $headers[] = $description;
 362                     }
 363                 }
 364             } else if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 365                 $index = 'plugin' . count($this->plugincache);
 366                 $this->plugincache[$index] = array($plugin);
 367                 $columns[] = $index;
 368                 $headers[] = $plugin->get_name();
 369             }
 370         }
 371
 372         // Exclude 'Final grade' column in downloaded grading worksheets.
 373         if (!$this->is_downloading()) {
 374             // Final grade.
 375             $columns[] = 'finalgrade';
 376             $headers[] = get_string('finalgrade', 'grades');
 377         }
 378
 379         // Load the grading info for all users.
 380         $this->gradinginfo = grade_get_grades($this->assignment->get_course()->id,
 381                                               'mod',
 382                                               'assign',
 383                                               $this->assignment->get_instance()->id,
 384                                               $users);
 385
 386         if (!empty($CFG->enableoutcomes) && !empty($this->gradinginfo->outcomes)) {
 387             $columns[] = 'outcomes';
 388             $headers[] = get_string('outcomes', 'grades');
 389         }
 390
 391         // Set the columns.
 392         $this->define_columns($columns);
 393         $this->define_headers($headers);
 394         foreach ($extrauserfields as $extrafield) {
 395              $this->column_class($extrafield, $extrafield);
 396         }
 397         // We require at least one unique column for the sort.
 398         $this->sortable(true, 'userid');
 399         $this->no_sorting('recordid');
 400         $this->no_sorting('finalgrade');
 401         $this->no_sorting('userid');
 402         $this->no_sorting('select');
 403         $this->no_sorting('outcomes');
 404
 405         if ($assignment->get_instance()->teamsubmission) {
 406             $this->no_sorting('team');
 407         }
 408
 409         $plugincolumnindex = 0;
 410         foreach ($this->assignment->get_submission_plugins() as $plugin) {
 411             if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 412                 $submissionpluginindex = 'plugin' . $plugincolumnindex++;
 413                 $this->no_sorting($submissionpluginindex);
 414             }
 415         }
 416         foreach ($this->assignment->get_feedback_plugins() as $plugin) {
 417             if ($plugin->is_visible() && $plugin->is_enabled() && $plugin->has_user_summary()) {
 418                 $feedbackpluginindex = 'plugin' . $plugincolumnindex++;
 419                 $this->no_sorting($feedbackpluginindex);
 420             }
 421         }
 422
 423         // When there is no data we still want the column headers printed in the csv file.
 424         if ($this->is_downloading()) {
 425             $this->start_output();
 426         }
 427     }
 428
 429     /**
 430      * Before adding each row to the table make sure rownum is incremented.
 431      *
 432      * @param array $row row of data from db used to make one row of the table.
 433      * @return array one row for the table
 434      */
 435     public function format_row($row) {
 436         if ($this->rownum < 0) {
 437             $this->rownum = $this->currpage * $this->pagesize;
 438         } else {
 439             $this->rownum += 1;
 440         }
 441
 442         return parent::format_row($row);
 443     }
 444
 445     /**
 446      * Add a column with an ID that uniquely identifies this user in this assignment.
 447      *
 448      * @param stdClass $row
 449      * @return string
 450      */
 451     public function col_recordid(stdClass $row) {
 452         return get_string('hiddenuser', 'assign') .
 453                $this->assignment->get_uniqueid_for_user($row->userid);
 454     }
 455
 456
 457     /**
 458      * Add the userid to the row class so it can be updated via ajax.
 459      *
 460      * @param stdClass $row The row of data
 461      * @return string The row class
 462      */
 463     public function get_row_class($row) {
 464         return 'user' . $row->userid;
 465     }
 466
 467     /**
 468      * Return the number of rows to display on a single page.
 469      *
 470      * @return int The number of rows per page
 471      */
 472     public function get_rows_per_page() {
 473         return $this->perpage;
 474     }
 475
 476     /**
 477      * list current marking workflow state
 478      *
 479      * @param stdClass $row
 480      * @return string
 481      */
 482     public function col_workflowstatus(stdClass $row) {
 483         $o = '';
 484
 485         $gradingdisabled = $this->assignment->grading_disabled($row->id);
 486         // The function in the assignment keeps a static cache of this list of states.
 487         $workflowstates = $this->assignment->get_marking_workflow_states_for_current_user();
 488         $workflowstate = $row->workflowstate;
 489         if (empty($workflowstate)) {
 490             $workflowstate = ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED;
 491         }
 492         if ($this->quickgrading && !$gradingdisabled) {
 493             $notmarked = get_string('markingworkflowstatenotmarked', 'assign');
 494             $name = 'quickgrade_' . $row->id . '_workflowstate';
 495             $o .= html_writer::select($workflowstates, $name, $workflowstate, array('' => $notmarked));
 496             // Check if this user is a marker that can't manage allocations and doesn't have the marker column added.
 497             if ($this->assignment->get_instance()->markingworkflow &&
 498                 $this->assignment->get_instance()->markingallocation &&
 499                 !has_capability('mod/assign:manageallocations', $this->assignment->get_context())) {
 500
 501                 $name = 'quickgrade_' . $row->id . '_allocatedmarker';
 502                 $o .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => $name,
 503                         'value' => $row->allocatedmarker));
 504             }
 505         } else {
 506             $o .= $this->output->container(get_string('markingworkflowstate' . $workflowstate, 'assign'), $workflowstate);
 507         }
 508         return $o;
 509     }
 510
 511     /**
 512      * For download only - list current marking workflow state
 513      *
 514      * @param stdClass $row - The row of data
 515      * @return string The current marking workflow state
 516      */
 517     public function col_workflowstate($row) {
 518         $state = $row->workflowstate;
 519         if (empty($state)) {
 520             $state = ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED;
 521         }
 522
 523         return get_string('markingworkflowstate' . $state, 'assign');
 524     }
 525
 526     /**
 527      * list current marker
 528      *
 529      * @param stdClass $row - The row of data
 530      * @return id the user->id of the marker.
 531      */
 532     public function col_allocatedmarker(stdClass $row) {
 533         static $markers = null;
 534         static $markerlist = array();
 535         if ($markers === null) {
 536             $markers = get_users_by_capability($this->assignment->get_context(), 'mod/assign:grade');
 537             $markerlist[0] = get_string('choosemarker', 'assign');
 538             foreach ($markers as $marker) {
 539                 $markerlist[$marker->id] = fullname($marker);
 540             }
 541         }
 542         if (empty($markerlist)) {
 543             // TODO: add some form of notification here that no markers are available.
 544             return '';
 545         }
 546         if ($this->is_downloading()) {
 547             if (isset($markers[$row->allocatedmarker])) {
 548                 return fullname($markers[$row->allocatedmarker]);
 549             } else {
 550                 return '';
 551             }
 552         }
 553
 554         if ($this->quickgrading && has_capability('mod/assign:manageallocations', $this->assignment->get_context()) &&
 555             (empty($row->workflowstate) ||
 556              $row->workflowstate == ASSIGN_MARKING_WORKFLOW_STATE_INMARKING ||
 557              $row->workflowstate == ASSIGN_MARKING_WORKFLOW_STATE_NOTMARKED)) {
 558
 559             $name = 'quickgrade_' . $row->id . '_allocatedmarker';
 560             return  html_writer::select($markerlist, $name, $row->allocatedmarker, false);
 561         } else if (!empty($row->allocatedmarker)) {
 562             $output = '';
 563             if ($this->quickgrading) { // Add hidden field for quickgrading page.
 564                 $name = 'quickgrade_' . $row->id . '_allocatedmarker';
 565                 $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name'=>$name, 'value'=>$row->allocatedmarker));
 566             }
 567             $output .= $markerlist[$row->allocatedmarker];
 568             return $output;
 569         }
 570     }
 571     /**
 572      * For download only - list all the valid options for this custom scale.
 573      *
 574      * @param stdClass $row - The row of data
 575      * @return string A list of valid options for the current scale
 576      */
 577     public function col_scale($row) {
 578         global $DB;
 579
 580         if (empty($this->scale)) {
 581             $dbparams = array('id'=>-($this->assignment->get_instance()->grade));
 582             $this->scale = $DB->get_record('scale', $dbparams);
 583         }
 584
 585         if (!empty($this->scale->scale)) {
 586             return implode("\n", explode(',', $this->scale->scale));
 587         }
 588         return '';
 589     }
 590
 591     /**
 592      * Display a grade with scales etc.
 593      *
 594      * @param string $grade
 595      * @param boolean $editable
 596      * @param int $userid The user id of the user this grade belongs to
 597      * @param int $modified Timestamp showing when the grade was last modified
 598      * @return string The formatted grade
 599      */
 600     public function display_grade($grade, $editable, $userid, $modified) {
 601         if ($this->is_downloading()) {
 602             if ($this->assignment->get_instance()->grade >= 0) {
 603                 if ($grade == -1 || $grade === null) {
 604                     return '';
 605                 }
 606                 return format_float($grade, 2);
 607             } else {
 608                 // This is a custom scale.
 609                 $scale = $this->assignment->display_grade($grade, false);
 610                 if ($scale == '-') {
 611                     $scale = '';
 612                 }
 613                 return $scale;
 614             }
 615         }
 616         return $this->assignment->display_grade($grade, $editable, $userid, $modified);
 617     }
 618
 619     /**
 620      * Get the team info for this user.
 621      *
 622      * @param stdClass $row
 623      * @return string The team name
 624      */
 625     public function col_team(stdClass $row) {
 626         $submission = false;
 627         $group = false;
 628         $this->get_group_and_submission($row->id, $group, $submission, -1);
 629         if ($group) {
 630             return $group->name;
 631         }
 632         return get_string('defaultteam', 'assign');
 633     }
 634
 635     /**
 636      * Use a static cache to try and reduce DB calls.
 637      *
 638      * @param int $userid The user id for this submission
 639      * @param int $group The groupid (returned)
 640      * @param stdClass|false $submission The stdClass submission or false (returned)
 641      * @param int $attemptnumber Return a specific attempt number (-1 for latest)
 642      */
 643     protected function get_group_and_submission($userid, &$group, &$submission, $attemptnumber) {
 644         $group = false;
 645         if (isset($this->submissiongroups[$userid])) {
 646             $group = $this->submissiongroups[$userid];
 647         } else {
 648             $group = $this->assignment->get_submission_group($userid, false);
 649             $this->submissiongroups[$userid] = $group;
 650         }
 651
 652         $groupid = 0;
 653         if ($group) {
 654             $groupid = $group->id;
 655         }
 656
 657         // Static cache is keyed by groupid and attemptnumber.
 658         // We may need both the latest and previous attempt in the same page.
 659         if (isset($this->groupsubmissions[$groupid . ':' . $attemptnumber])) {
 660             $submission = $this->groupsubmissions[$groupid . ':' . $attemptnumber];
 661         } else {
 662             $submission = $this->assignment->get_group_submission($userid, $groupid, false, $attemptnumber);
 663             $this->groupsubmissions[$groupid . ':' . $attemptnumber] = $submission;
 664         }
 665     }
 666
 667     /**
 668      * Format a list of outcomes.
 669      *
 670      * @param stdClass $row
 671      * @return string
 672      */
 673     public function col_outcomes(stdClass $row) {
 674         $outcomes = '';
 675         foreach ($this->gradinginfo->outcomes as $index => $outcome) {
 676             $options = make_grades_menu(-$outcome->scaleid);
 677
 678             $options[0] = get_string('nooutcome', 'grades');
 679             if ($this->quickgrading && !($outcome->grades[$row->userid]->locked)) {
 680                 $select = '<select name="outcome_' . $index . '_' . $row->userid . '" class="quickgrade">';
 681                 foreach ($options as $optionindex => $optionvalue) {
 682                     $selected = '';
 683                     if ($outcome->grades[$row->userid]->grade == $optionindex) {
 684                         $selected = 'selected="selected"';
 685                     }
 686                     $select .= '<option value="' . $optionindex . '"' . $selected . '>' . $optionvalue . '</option>';
 687                 }
 688                 $select .= '</select>';
 689                 $outcomes .= $this->output->container($outcome->name . ': ' . $select, 'outcome');
 690             } else {
 691                 $name = $outcome->name . ': ' . $options[$outcome->grades[$row->userid]->grade];
 692                 if ($this->is_downloading()) {
 693                     $outcomes .= $name;
 694                 } else {
 695                     $outcomes .= $this->output->container($name, 'outcome');
 696                 }
 697             }
 698         }
 699
 700         return $outcomes;
 701     }
 702
 703
 704     /**
 705      * Format a user picture for display.
 706      *
 707      * @param stdClass $row
 708      * @return string
 709      */
 710     public function col_picture(stdClass $row) {
 711         if ($row->picture) {
 712             return $this->output->user_picture($row);
 713         }
 714         return '';
 715     }
 716
 717     /**
 718      * Format a user record for display (link to profile).
 719      *
 720      * @param stdClass $row
 721      * @return string
 722      */
 723     public function col_fullname($row) {
 724         if (!$this->is_downloading()) {
 725             $courseid = $this->assignment->get_course()->id;
 726             $link= new moodle_url('/user/view.php', array('id' =>$row->id, 'course'=>$courseid));
 727             $fullname = $this->output->action_link($link, $this->assignment->fullname($row));
 728         } else {
 729             $fullname = $this->assignment->fullname($row);
 730         }
 731
 732         if (!$this->assignment->is_active_user($row->id)) {
 733             $suspendedstring = get_string('userenrolmentsuspended', 'grades');
 734             $fullname .= ' ' . html_writer::empty_tag('img', array('src' => $this->output->pix_url('i/enrolmentsuspended'),
 735                 'title' => $suspendedstring, 'alt' => $suspendedstring, 'class' => 'usersuspendedicon'));
 736             $fullname = html_writer::tag('span', $fullname, array('class' => 'usersuspended'));
 737         }
 738         return $fullname;
 739     }
 740
 741     /**
 742      * Insert a checkbox for selecting the current row for batch operations.
 743      *
 744      * @param stdClass $row
 745      * @return string
 746      */
 747     public function col_select(stdClass $row) {
 748         $selectcol = '<label class="accesshide" for="selectuser_' . $row->userid . '">';
 749         $selectcol .= get_string('selectuser', 'assign', $this->assignment->fullname($row));
 750         $selectcol .= '</label>';
 751         $selectcol .= '<input type="checkbox"
 752                               id="selectuser_' . $row->userid . '"
 753                               name="selectedusers"
 754                               value="' . $row->userid . '"/>';
 755         $selectcol .= '<input type="hidden"
 756                               name="grademodified_' . $row->userid . '"
 757                               value="' . $row->timemarked . '"/>';
 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() && $this->hasgrade) {
 814             $name = $this->assignment->fullname($row);
 815             $icon = $this->output->pix_icon('gradefeedback',
 816                                             get_string('gradeuser', 'assign', $name),
 817                                             'mod_assign');
 818             $urlparams = array('id' => $this->assignment->get_course_module()->id,
 819                                'rownum'=>$this->rownum,
 820                                'action'=>'grade');
 821             $url = new moodle_url('/mod/assign/view.php', $urlparams);
 822             $link = $this->output->action_link($url, $icon);
 823             $grade .= $link . $separator;
 824         }
 825
 826         $grade .= $this->display_grade($row->grade,
 827                                        $this->quickgrading && !$gradingdisabled,
 828                                        $row->userid,
 829                                        $row->timemarked);
 830
 831         return $grade;
 832     }
 833
 834     /**
 835      * Format a column of data for display.
 836      *
 837      * @param stdClass $row
 838      * @return string
 839      */
 840     public function col_finalgrade(stdClass $row) {
 841         $o = '';
 842
 843         $grade = $this->get_gradebook_data_for_user($row->userid);
 844         if ($grade) {
 845             $o = $this->display_grade($grade->grade, false, $row->userid, $row->timemarked);
 846         }
 847
 848         return $o;
 849     }
 850
 851     /**
 852      * Format a column of data for display.
 853      *
 854      * @param stdClass $row
 855      * @return string
 856      */
 857     public function col_timemarked(stdClass $row) {
 858         $o = '-';
 859
 860         if ($row->timemarked && $row->grade !== null && $row->grade >= 0) {
 861             $o = userdate($row->timemarked);
 862         }
 863         if ($row->timemarked && $this->is_downloading()) {
 864             // Force it for downloads as it affects import.
 865             $o = userdate($row->timemarked);
 866         }
 867
 868         return $o;
 869     }
 870
 871     /**
 872      * Format a column of data for display.
 873      *
 874      * @param stdClass $row
 875      * @return string
 876      */
 877     public function col_timesubmitted(stdClass $row) {
 878         $o = '-';
 879
 880         $group = false;
 881         $submission = false;
 882         $this->get_group_and_submission($row->id, $group, $submission, -1);
 883         if ($group && $submission && $submission->timemodified) {
 884             $o = userdate($submission->timemodified);
 885         } else if ($row->timesubmitted) {
 886             $o = userdate($row->timesubmitted);
 887         }
 888
 889         return $o;
 890     }
 891
 892     /**
 893      * Format a column of data for display
 894      *
 895      * @param stdClass $row
 896      * @return string
 897      */
 898     public function col_status(stdClass $row) {
 899         $o = '';
 900
 901         $instance = $this->assignment->get_instance();
 902
 903         $due = $instance->duedate;
 904         if ($row->extensionduedate) {
 905             $due = $row->extensionduedate;
 906         }
 907
 908         $group = false;
 909         $submission = false;
 910         $this->get_group_and_submission($row->id, $group, $submission, -1);
 911         if ($group && $submission) {
 912             $timesubmitted = $submission->timemodified;
 913             $status = $submission->status;
 914         } else {
 915             $timesubmitted = $row->timesubmitted;
 916             $status = $row->status;
 917         }
 918
 919         if ($this->assignment->is_any_submission_plugin_enabled()) {
 920
 921             $o .= $this->output->container(get_string('submissionstatus_' . $status, 'assign'),
 922                                            array('class'=>'submissionstatus' .$status));
 923             if ($due && $timesubmitted > $due) {
 924                 $usertime = format_time($timesubmitted - $due);
 925                 $latemessage = get_string('submittedlateshort',
 926                                           'assign',
 927                                           $usertime);
 928                 $o .= $this->output->container($latemessage, 'latesubmission');
 929             }
 930             if ($row->locked) {
 931                 $lockedstr = get_string('submissionslockedshort', 'assign');
 932                 $o .= $this->output->container($lockedstr, 'lockedsubmission');
 933             }
 934
 935             // Add status of "grading", use markflow if enabled.
 936             if ($instance->markingworkflow) {
 937                 $o .= $this->col_workflowstatus($row);
 938             } else if ($row->grade !== null && $row->grade >= 0) {
 939                 $o .= $this->output->container(get_string('graded', 'assign'), 'submissiongraded');
 940             } else if (!$timesubmitted) {
 941                 $now = time();
 942                 if ($due && ($now > $due)) {
 943                     $overduestr = get_string('overdue', 'assign', format_time($now - $due));
 944                     $o .= $this->output->container($overduestr, 'overduesubmission');
 945                 }
 946             }
 947
 948             if ($row->extensionduedate) {
 949                 $userdate = userdate($row->extensionduedate);
 950                 $extensionstr = get_string('userextensiondate', 'assign', $userdate);
 951                 $o .= $this->output->container($extensionstr, 'extensiondate');
 952             }
 953         }
 954
 955         if ($this->is_downloading()) {
 956             $o = strip_tags(str_replace('</div>', "\n", $o));
 957         }
 958
 959         return $o;
 960     }
 961
 962     /**
 963      * Format a column of data for display.
 964      *
 965      * @param stdClass $row
 966      * @return string
 967      */
 968     public function col_userid(stdClass $row) {
 969         global $USER;
 970
 971         $edit = '';
 972
 973         $actions = array();
 974
 975         $urlparams = array('id'=>$this->assignment->get_course_module()->id,
 976                            'rownum'=>$this->rownum,
 977                            'action'=>'grade');
 978         $url = new moodle_url('/mod/assign/view.php', $urlparams);
 979         $noimage = null;
 980
 981         if (!$row->grade) {
 982             $description = get_string('grade');
 983         } else {
 984             $description = get_string('updategrade', 'assign');
 985         }
 986         $actions['grade'] = new action_menu_link_secondary(
 987             $url,
 988             $noimage,
 989             $description
 990         );
 991
 992         // Everything we need is in the row.
 993         $submission = $row;
 994         $flags = $row;
 995         if ($this->assignment->get_instance()->teamsubmission) {
 996             // Use the cache for this.
 997             $submission = false;
 998             $group = false;
 999             $this->get_group_and_submission($row->id, $group, $submission, -1);
1000         }
1001
1002         $submissionsopen = $this->assignment->submissions_open($row->id,
1003                                                                true,
1004                                                                $submission,
1005                                                                $flags,
1006                                                                $this->gradinginfo);
1007         $caneditsubmission = $this->assignment->can_edit_submission($row->id, $USER->id);
1008
1009         // Hide for offline assignments.
1010         if ($this->assignment->is_any_submission_plugin_enabled()) {
1011             if (!$row->status ||
1012                     $row->status == ASSIGN_SUBMISSION_STATUS_DRAFT ||
1013                     !$this->assignment->get_instance()->submissiondrafts) {
1014
1015                 if (!$row->locked) {
1016                     $urlparams = array('id' => $this->assignment->get_course_module()->id,
1017                                        'userid'=>$row->id,
1018                                        'action'=>'lock',
1019                                        'sesskey'=>sesskey(),
1020                                        'page'=>$this->currpage);
1021                     $url = new moodle_url('/mod/assign/view.php', $urlparams);
1022
1023                     $description = get_string('preventsubmissionsshort', 'assign');
1024                     $actions['lock'] = new action_menu_link_secondary(
1025                         $url,
1026                         $noimage,
1027                         $description
1028                     );
1029                 } else {
1030                     $urlparams = array('id' => $this->assignment->get_course_module()->id,
1031                                        'userid'=>$row->id,
1032                                        'action'=>'unlock',
1033                                        'sesskey'=>sesskey(),
1034                                        'page'=>$this->currpage);
1035                     $url = new moodle_url('/mod/assign/view.php', $urlparams);
1036                     $description = get_string('allowsubmissionsshort', 'assign');
1037                     $actions['unlock'] = new action_menu_link_secondary(
1038                         $url,
1039                         $noimage,
1040                         $description
1041                     );
1042                 }
1043             }
1044
1045             if (($this->assignment->get_instance()->duedate ||
1046                    $this->assignment->get_instance()->cutoffdate) &&
1047                    $this->hasgrantextension) {
1048                 $urlparams = array('id' => $this->assignment->get_course_module()->id,
1049                                    'userid'=>$row->id,
1050                                    'action'=>'grantextension',
1051                                    'sesskey'=>sesskey(),
1052                                    'page'=>$this->currpage);
1053                 $url = new moodle_url('/mod/assign/view.php', $urlparams);
1054                 $description = get_string('grantextension', 'assign');
1055                 $actions['grantextension'] = new action_menu_link_secondary(
1056                     $url,
1057                     $noimage,
1058                     $description
1059                 );
1060             }
1061             if ($submissionsopen &&
1062                     $USER->id != $row->id &&
1063                     $caneditsubmission) {
1064                 $urlparams = array('id' => $this->assignment->get_course_module()->id,
1065                                    'userid'=>$row->id,
1066                                    'action'=>'editsubmission',
1067                                    'sesskey'=>sesskey(),
1068                                    'page'=>$this->currpage);
1069                 $url = new moodle_url('/mod/assign/view.php', $urlparams);
1070                 $description = get_string('editsubmission', 'assign');
1071                 $actions['editsubmission'] = new action_menu_link_secondary(
1072                     $url,
1073                     $noimage,
1074                     $description
1075                 );
1076             }
1077         }
1078         if ($row->status == ASSIGN_SUBMISSION_STATUS_SUBMITTED &&
1079                 $this->assignment->get_instance()->submissiondrafts) {
1080             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1081                                'userid'=>$row->id,
1082                                'action'=>'reverttodraft',
1083                                'sesskey'=>sesskey(),
1084                                'page'=>$this->currpage);
1085             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1086             $description = get_string('reverttodraftshort', 'assign');
1087             $actions['reverttodraft'] = new action_menu_link_secondary(
1088                 $url,
1089                 $noimage,
1090                 $description
1091             );
1092         }
1093         if ($row->status == ASSIGN_SUBMISSION_STATUS_DRAFT &&
1094                 $this->assignment->get_instance()->submissiondrafts &&
1095                 $caneditsubmission &&
1096                 $submissionsopen &&
1097                 $row->id != $USER->id) {
1098             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1099                                'userid'=>$row->id,
1100                                'action'=>'submitotherforgrading',
1101                                'sesskey'=>sesskey(),
1102                                'page'=>$this->currpage);
1103             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1104             $description = get_string('submitforgrading', 'assign');
1105             $actions['submitforgrading'] = new action_menu_link_secondary(
1106                 $url,
1107                 $noimage,
1108                 $description
1109             );
1110         }
1111
1112         $ismanual = $this->assignment->get_instance()->attemptreopenmethod == ASSIGN_ATTEMPT_REOPEN_METHOD_MANUAL;
1113         $hassubmission = !empty($row->status);
1114         $notreopened = $hassubmission && $row->status != ASSIGN_SUBMISSION_STATUS_REOPENED;
1115         $isunlimited = $this->assignment->get_instance()->maxattempts == ASSIGN_UNLIMITED_ATTEMPTS;
1116         $hasattempts = $isunlimited || $row->attemptnumber < $this->assignment->get_instance()->maxattempts - 1;
1117
1118         if ($ismanual && $hassubmission && $notreopened && $hasattempts) {
1119             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1120                                'userid'=>$row->id,
1121                                'action'=>'addattempt',
1122                                'sesskey'=>sesskey(),
1123                                'page'=>$this->currpage);
1124             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1125             $description = get_string('addattempt', 'assign');
1126             $actions['addattempt'] = new action_menu_link_secondary(
1127                 $url,
1128                 $noimage,
1129                 $description
1130             );
1131         }
1132
1133         $menu = new action_menu();
1134         $menu->set_owner_selector('.gradingtable-actionmenu');
1135         $menu->set_alignment(action_menu::TL, action_menu::BL);
1136         $menu->set_constraint('.gradingtable > .no-overflow');
1137         $menu->set_menu_trigger(get_string('edit'));
1138         foreach ($actions as $action) {
1139             $menu->add($action);
1140         }
1141
1142         // Prioritise the menu ahead of all other actions.
1143         $menu->prioritise = true;
1144
1145         $edit .= $this->output->render($menu);
1146
1147         return $edit;
1148     }
1149
1150     /**
1151      * Write the plugin summary with an optional link to view the full feedback/submission.
1152      *
1153      * @param assign_plugin $plugin Submission plugin or feedback plugin
1154      * @param stdClass $item Submission or grade
1155      * @param string $returnaction The return action to pass to the
1156      *                             view_submission page (the current page)
1157      * @param string $returnparams The return params to pass to the view_submission
1158      *                             page (the current page)
1159      * @return string The summary with an optional link
1160      */
1161     private function format_plugin_summary_with_link(assign_plugin $plugin,
1162                                                      stdClass $item,
1163                                                      $returnaction,
1164                                                      $returnparams) {
1165         $link = '';
1166         $showviewlink = false;
1167
1168         $summary = $plugin->view_summary($item, $showviewlink);
1169         $separator = '';
1170         if ($showviewlink) {
1171             $viewstr = get_string('view' . substr($plugin->get_subtype(), strlen('assign')), 'assign');
1172             $icon = $this->output->pix_icon('t/preview', $viewstr);
1173             $urlparams = array('id' => $this->assignment->get_course_module()->id,
1174                                                      'sid'=>$item->id,
1175                                                      'gid'=>$item->id,
1176                                                      'plugin'=>$plugin->get_type(),
1177                                                      'action'=>'viewplugin' . $plugin->get_subtype(),
1178                                                      'returnaction'=>$returnaction,
1179                                                      'returnparams'=>http_build_query($returnparams));
1180             $url = new moodle_url('/mod/assign/view.php', $urlparams);
1181             $link = $this->output->action_link($url, $icon);
1182             $separator = $this->output->spacer(array(), true);
1183         }
1184
1185         return $link . $separator . $summary;
1186     }
1187
1188
1189     /**
1190      * Format the submission and feedback columns.
1191      *
1192      * @param string $colname The column name
1193      * @param stdClass $row The submission row
1194      * @return mixed string or NULL
1195      */
1196     public function other_cols($colname, $row) {
1197         // For extra user fields the result is already in $row.
1198         if (empty($this->plugincache[$colname])) {
1199             return $row->$colname;
1200         }
1201
1202         // This must be a plugin field.
1203         $plugincache = $this->plugincache[$colname];
1204
1205         $plugin = $plugincache[0];
1206
1207         $field = null;
1208         if (isset($plugincache[1])) {
1209             $field = $plugincache[1];
1210         }
1211
1212         if ($plugin->is_visible() && $plugin->is_enabled()) {
1213             if ($plugin->get_subtype() == 'assignsubmission') {
1214                 if ($this->assignment->get_instance()->teamsubmission) {
1215                     $group = false;
1216                     $submission = false;
1217
1218                     $this->get_group_and_submission($row->id, $group, $submission, -1);
1219                     if ($submission) {
1220                         if ($submission->status == ASSIGN_SUBMISSION_STATUS_REOPENED) {
1221                             // For a newly reopened submission - we want to show the previous submission in the table.
1222                             $this->get_group_and_submission($row->id, $group, $submission, $submission->attemptnumber-1);
1223                         }
1224                         if (isset($field)) {
1225                             return $plugin->get_editor_text($field, $submission->id);
1226                         }
1227                         return $this->format_plugin_summary_with_link($plugin,
1228                                                                       $submission,
1229                                                                       'grading',
1230                                                                       array());
1231                     }
1232                 } else if ($row->submissionid) {
1233                     if ($row->status == ASSIGN_SUBMISSION_STATUS_REOPENED) {
1234                         // For a newly reopened submission - we want to show the previous submission in the table.
1235                         $submission = $this->assignment->get_user_submission($row->userid, false, $row->attemptnumber - 1);
1236                     } else {
1237                         $submission = new stdClass();
1238                         $submission->id = $row->submissionid;
1239                         $submission->timecreated = $row->firstsubmission;
1240                         $submission->timemodified = $row->timesubmitted;
1241                         $submission->assignment = $this->assignment->get_instance()->id;
1242                         $submission->userid = $row->userid;
1243                         $submission->attemptnumber = $row->attemptnumber;
1244                     }
1245                     // Field is used for only for import/export and refers the the fieldname for the text editor.
1246                     if (isset($field)) {
1247                         return $plugin->get_editor_text($field, $submission->id);
1248                     }
1249                     return $this->format_plugin_summary_with_link($plugin,
1250                                                                   $submission,
1251                                                                   'grading',
1252                                                                   array());
1253                 }
1254             } else {
1255                 $grade = null;
1256                 if (isset($field)) {
1257                     return $plugin->get_editor_text($field, $row->gradeid);
1258                 }
1259
1260                 if ($row->gradeid) {
1261                     $grade = new stdClass();
1262                     $grade->id = $row->gradeid;
1263                     $grade->timecreated = $row->firstmarked;
1264                     $grade->timemodified = $row->timemarked;
1265                     $grade->assignment = $this->assignment->get_instance()->id;
1266                     $grade->userid = $row->userid;
1267                     $grade->grade = $row->grade;
1268                     $grade->mailed = $row->mailed;
1269                     $grade->attemptnumber = $row->attemptnumber;
1270                 }
1271                 if ($this->quickgrading && $plugin->supports_quickgrading()) {
1272                     return $plugin->get_quickgrading_html($row->userid, $grade);
1273                 } else if ($grade) {
1274                     return $this->format_plugin_summary_with_link($plugin,
1275                                                                   $grade,
1276                                                                   'grading',
1277                                                                   array());
1278                 }
1279             }
1280         }
1281         return '';
1282     }
1283
1284     /**
1285      * Using the current filtering and sorting - load all rows and return a single column from them.
1286      *
1287      * @param string $columnname The name of the raw column data
1288      * @return array of data
1289      */
1290     public function get_column_data($columnname) {
1291         $this->setup();
1292         $this->currpage = 0;
1293         $this->query_db($this->tablemaxrows);
1294         $result = array();
1295         foreach ($this->rawdata as $row) {
1296             $result[] = $row->$columnname;
1297         }
1298         return $result;
1299     }
1300
1301     /**
1302      * Return things to the renderer.
1303      *
1304      * @return string the assignment name
1305      */
1306     public function get_assignment_name() {
1307         return $this->assignment->get_instance()->name;
1308     }
1309
1310     /**
1311      * Return things to the renderer.
1312      *
1313      * @return int the course module id
1314      */
1315     public function get_course_module_id() {
1316         return $this->assignment->get_course_module()->id;
1317     }
1318
1319     /**
1320      * Return things to the renderer.
1321      *
1322      * @return int the course id
1323      */
1324     public function get_course_id() {
1325         return $this->assignment->get_course()->id;
1326     }
1327
1328     /**
1329      * Return things to the renderer.
1330      *
1331      * @return stdClass The course context
1332      */
1333     public function get_course_context() {
1334         return $this->assignment->get_course_context();
1335     }
1336
1337     /**
1338      * Return things to the renderer.
1339      *
1340      * @return bool Does this assignment accept submissions
1341      */
1342     public function submissions_enabled() {
1343         return $this->assignment->is_any_submission_plugin_enabled();
1344     }
1345
1346     /**
1347      * Return things to the renderer.
1348      *
1349      * @return bool Can this user view all grades (the gradebook)
1350      */
1351     public function can_view_all_grades() {
1352         $context = $this->assignment->get_course_context();
1353         return has_capability('gradereport/grader:view', $context) &&
1354                has_capability('moodle/grade:viewall', $context);
1355     }
1356
1357     /**
1358      * Override the table show_hide_link to not show for select column.
1359      *
1360      * @param string $column the column name, index into various names.
1361      * @param int $index numerical index of the column.
1362      * @return string HTML fragment.
1363      */
1364     protected function show_hide_link($column, $index) {
1365         if ($index > 0 || !$this->hasgrade) {
1366             return parent::show_hide_link($column, $index);
1367         }
1368         return '';
1369     }
1370 }