MDL-57602 mod_assign: Add 'Granted extension' filter for grading table

mod/assign/gradingoptionsform.php

@@ -60,7 +60,8 @@ class mod_assign_grading_options_form extends moodleform {
         $options = array('' => get_string('filternone', 'assign'),
                          ASSIGN_FILTER_NOT_SUBMITTED => get_string('filternotsubmitted', 'assign'),
                          ASSIGN_FILTER_SUBMITTED => get_string('filtersubmitted', 'assign'),
-                         ASSIGN_FILTER_REQUIRE_GRADING => get_string('filterrequiregrading', 'assign'));
+                         ASSIGN_FILTER_REQUIRE_GRADING => get_string('filterrequiregrading', 'assign'),
+                         ASSIGN_FILTER_GRANTED_EXTENSION => get_string('filtergrantedextension', 'assign'));
         if ($instance['submissionsenabled']) {
             $mform->addElement('select', 'filter', get_string('filter', 'assign'), $options, $dirtyclass);
         }

mod/assign/gradingtable.php

@@ -287,6 +287,9 @@ class assign_grading_table extends table_sql implements renderable {
                 $where .= '))';
                 $params['submitted'] = ASSIGN_SUBMISSION_STATUS_SUBMITTED;
 
+            } else if ($filter == ASSIGN_FILTER_GRANTED_EXTENSION) {
+                $where .= ' AND uf.extensionduedate > 0 ';
+
             } else if (strpos($filter, ASSIGN_FILTER_SINGLE_USER) === 0) {
                 $userfilter = (int) array_pop(explode('=', $filter));
                 $where .= ' AND (u.id = :userid)';

mod/assign/lang/en/assign.php

@@ -232,6 +232,7 @@ $string['feedbacksettings'] = 'Feedback settings';
 $string['feedbacktypes'] = 'Feedback types';
 $string['filesubmissions'] = 'File submissions';
 $string['filter'] = 'Filter';
+$string['filtergrantedextension'] = 'Granted extension';
 $string['filternone'] = 'No filter';
 $string['filternotsubmitted'] = 'Not submitted';
 $string['filterrequiregrading'] = 'Requires grading';

mod/assign/locallib.php

@@ -37,6 +37,7 @@ define('ASSIGN_FILTER_SUBMITTED', 'submitted');
 define('ASSIGN_FILTER_NOT_SUBMITTED', 'notsubmitted');
 define('ASSIGN_FILTER_SINGLE_USER', 'singleuser');
 define('ASSIGN_FILTER_REQUIRE_GRADING', 'require_grading');
+define('ASSIGN_FILTER_GRANTED_EXTENSION', 'granted_extension');
 
 // Marker filter for grading page.
 define('ASSIGN_MARKER_FILTER_NO_MARKER', -1);