MDL-55821 assign: Show assign grade

When marking workflow is enabled and the grade is not released yet,
it would be helpful to show the assignment grade in the grading form.

mod/assign/lang/en/assign.php

@@ -128,6 +128,7 @@ $string['couldnotconvertsubmission'] = 'Could not convert assignment submission
 $string['couldnotcreatecoursemodule'] = 'Could not create course module.';
 $string['couldnotcreatenewassignmentinstance'] = 'Could not create new assignment instance.';
 $string['couldnotfindassignmenttoupgrade'] = 'Could not find old assignment instance to upgrade.';
+$string['currentassigngrade'] = 'Current grade in assignment';
 $string['currentgrade'] = 'Current grade in gradebook';
 $string['currentattempt'] = 'This is attempt {$a}.';
 $string['currentattemptof'] = 'This is attempt {$a->attemptnumber} ( {$a->maxattempts} attempts allowed ).';

mod/assign/locallib.php

@@ -7406,6 +7406,14 @@ class assign {
             $options = array('' => get_string('markingworkflowstatenotmarked', 'assign')) + $states;
             $mform->addElement('select', 'workflowstate', get_string('markingworkflowstate', 'assign'), $options);
             $mform->addHelpButton('workflowstate', 'markingworkflowstate', 'assign');
+            $gradingstatus = $this->get_grading_status($userid);
+            if ($gradingstatus != ASSIGN_MARKING_WORKFLOW_STATE_RELEASED) {
+                if ($grade->grade && $grade->grade != -1) {
+                    $assigngradestring = html_writer::span(grade_floatval($grade->grade), 'currentgrade');
+                    $label = get_string('currentassigngrade', 'assign');
+                    $mform->addElement('static', 'currentassigngrade', $label, $assigngradestring);
+                }
+            }
         }
 
         if ($this->get_instance()->markingworkflow &&
@@ -7427,6 +7435,7 @@ class assign {
             $mform->disabledIf('allocatedmarker', 'workflowstate', 'eq', ASSIGN_MARKING_WORKFLOW_STATE_READYFORRELEASE);
             $mform->disabledIf('allocatedmarker', 'workflowstate', 'eq', ASSIGN_MARKING_WORKFLOW_STATE_RELEASED);
         }
+
         $gradestring = '<span class="currentgrade">' . $gradestring . '</span>';
         $mform->addElement('static', 'currentgrade', get_string('currentgrade', 'assign'), $gradestring);