Add option to hide response to students in essay question

classes/question/question.php

@@ -794,6 +794,26 @@ public function set_required($required) {
         return $DB->set_field('questionnaire_question', 'required', $rval, ['id' => $qid]);
     }
 
+    /**
+     * Set the question extradata field in the object and database.
+     *
+     * @param boolean $hiddenresponsetostudents Whether question should be visible to students or not.
+     */
+    public function set_extradata($hiddenresponsetostudents) {
+        global $DB;
+
+        // Need to fix this messed-up qid/id issue.
+        if (isset($this->qid) && ($this->qid > 0)) {
+            $qid = $this->qid;
+        } else {
+            $qid = $this->id;
+        }
+
+        $this->extradata = json_encode(['hiddenresponsetostudents' => $hiddenresponsetostudents]);
+
+        return $DB->set_field('questionnaire_question', 'extradata', $this->extradata, ['id' => $qid]);
+    }
+
     /**
      * Question specific display method.
      *
@@ -1603,4 +1623,4 @@ public function get_mobile_response_data($response) {
 
         return $resultdata;
     }
-}
+}

classes/questions_form.php

@@ -114,6 +114,7 @@ public function definition() {
             $tid = $question->type_id;
             $qtype = $question->type;
             $required = $question->required;
+            $extradata = json_decode($question->extradata);
 
             // Get displayable list of parents for the questions in questions_form.
             if ($questionnairehasdependencies) {
@@ -260,6 +261,23 @@ public function definition() {
                                     'alt' => $strrequired,
                                     'title' => $strrequired);
                     $manageqgroup[] =& $mform->createElement('image', 'requiredbutton['.$question->id.']', $reqsrc, $reqextra);
+
+                    // Implement logic to show and hide responses to students in essay questions.
+                    if ($question->type_id == QUESESSAY) {
+                        if ($extradata->hiddenresponsetostudents) {
+                            $reqsrc = $questionnaire->renderer->image_url('t/show');
+                            $strrequired = get_string('hiddenresponsetostudents', 'questionnaire');
+                        } else {
+                            $reqsrc = $questionnaire->renderer->image_url('t/hide');
+                            $strrequired = get_string('nothiddenresponsetostudents', 'questionnaire');
+                        }
+
+                        $strrequired .= ' ' . get_string('clicktoswitch', 'questionnaire');
+                        $reqextra = array('value' => $question->id,
+                                    'alt' => $strrequired,
+                                    'title' => $strrequired);
+                        $manageqgroup[] =& $mform->createElement('image', 'hiddentostudentsbutton[' . $question->id . ']', $reqsrc, $reqextra);
+                    }
                 }
                 $manageqgroup[] =& $mform->createElement('static', 'closetag_'.$question->id, '', '');
 
@@ -372,4 +390,4 @@ public function validation($data, $files) {
         return $errors;
     }
 
-}
+}

classes/responsetype/text.php

@@ -96,7 +96,7 @@ public function insert_response($responsedata) {
      * @throws \dml_exception
      */
     public function get_results($rids=false, $anonymous=false) {
-        global $DB;
+        global $COURSE, $DB, $USER;
 
         $rsql = '';
         if (!empty($rids)) {
@@ -106,7 +106,7 @@ public function get_results($rids=false, $anonymous=false) {
 
         if ($anonymous) {
             $sql = 'SELECT t.id, t.response, r.submitted AS submitted, ' .
-                    'r.questionnaireid, r.id AS rid ' .
+                    'r.questionnaireid, r.id AS rid, t.question_id AS questionid ' .
                     'FROM {'.static::response_table().'} t, ' .
                     '{questionnaire_response} r ' .
                     'WHERE question_id=' . $this->question->id . $rsql .
@@ -115,7 +115,7 @@ public function get_results($rids=false, $anonymous=false) {
         } else {
             $sql = 'SELECT t.id, t.response, r.submitted AS submitted, r.userid, u.username AS username, ' .
                     'u.id as usrid, ' .
-                    'r.questionnaireid, r.id AS rid ' .
+                    'r.questionnaireid, r.id AS rid, t.question_id AS questionid ' .
                     'FROM {'.static::response_table().'} t, ' .
                     '{questionnaire_response} r, ' .
                     '{user} u ' .
@@ -124,7 +124,25 @@ public function get_results($rids=false, $anonymous=false) {
                     ' AND u.id = r.userid ' .
                     'ORDER BY u.lastname, u.firstname, r.submitted';
         }
-        return $DB->get_records_sql($sql, $params);
+
+        $responses = $DB->get_records_sql($sql, $params);
+
+        // We're using this field to hide the question response to students.
+        if (\ltiservice_gradebookservices\local\service\gradebookservices::is_user_gradable_in_course($COURSE->id, $USER->id)) {
+            foreach ($responses as $response) {
+                $userid = $DB->get_field('questionnaire_response', 'userid', ['id' => $response->rid]);
+
+                $extradata = $DB->get_field('questionnaire_question', 'extradata', ['id' => $response->questionid]);
+                $extradata = json_decode($extradata);
+
+                $ownresponse = $USER->id == $userid;
+                if (!$ownresponse && $extradata->hiddenresponsetostudents) {
+                    $responses[$response->id]->response = get_string('cannotviewquestionresponse', 'questionnaire');
+                }
+            }
+        }
+
+        return $responses;
     }
 
     /**

lang/en/questionnaire.php

@@ -70,6 +70,7 @@
 $string['missingrequired'] = 'Question {$a} cannot be used in this feedback section because it is not required.';
 $string['missingnameandrequired'] = 'Question {$a} cannot be used in this feedback section because it does not have a name and it is not required.';
 $string['cannotviewpublicresponses'] = 'You cannot view responses to this public questionnaire.';
+$string['cannotviewquestionresponse'] = 'You can\'t view this response.';
 $string['chart:bipolar'] = 'Bipolar bars';
 $string['chart:hbar'] = 'Horizontal bars';
 $string['chart:radar'] = 'Radar';
@@ -250,6 +251,7 @@
 $string['grade'] = 'Submission grade';
 $string['gradesdeleted'] = 'Questionnaire grades deleted';
 $string['headingtext'] = 'Heading text';
+$string['hiddenresponsetostudents'] = 'Response is hidden to students';
 $string['horizontal'] = 'Horizontal';
 $string['id'] = 'ID';
 $string['includerankaverages'] = 'Include rank question averages';
@@ -336,6 +338,7 @@
 $string['notificationsimple'] = 'Notification only';
 $string['notifications_help'] = 'Notify roles with the "mod/questionnaire:submissionnotification" capability when a submission is made.';
 $string['notifications_link'] = 'mod/questionnaire/mod#Submission_Notifications';
+$string['nothiddenresponsetostudents'] = 'Response is visible to students';
 $string['notopen'] = 'This questionnaire will not open until {$a}.';
 $string['notrequired'] = 'Response is not required';
 $string['notset'] = 'not set';
@@ -653,4 +656,4 @@
 $string['yesno_help'] = 'Simple Yes/No question.';
 $string['yourresponse'] = 'Your response';
 $string['yourresponses'] = 'Your responses';
-$string['crontask'] = 'Questionnaire cleanup job';
+$string['crontask'] = 'Questionnaire cleanup job';

questions.php

@@ -161,6 +161,8 @@
             $qformdata->removebutton = $exformdata->removebutton;
         } else if (isset($exformdata->requiredbutton)) {
             $qformdata->requiredbutton = $exformdata->requiredbutton;
+        } else if (isset($exformdata->hiddentostudentsbutton)) {
+            $qformdata->hiddentostudentsbutton = $exformdata->hiddentostudentsbutton;
         }
 
         // Insert a section break.
@@ -206,7 +208,19 @@
             }
 
             $reload = true;
+        } else if (isset($qformdata->hiddentostudentsbutton)) {
+            // Need to use the key, since IE returns the image position as the value rather than the specified
+            // value in the <input> tag.
+            $qid = key($qformdata->hiddentostudentsbutton);
+
+            $extradata = json_decode($questionnaire->questions[$qid]->extradata);
+            if ($extradata->hiddenresponsetostudents) {
+                $questionnaire->questions[$qid]->set_extradata(false);
+            } else {
+                $questionnaire->questions[$qid]->set_extradata(true);
+            }
 
+            $reload = true;
         } else if (isset($qformdata->addqbutton)) {
             if ($qformdata->type_id == QUESPAGEBREAK) { // Adding section break is handled right away....
                 $questionrec = new stdClass();
@@ -405,4 +419,4 @@
     $questionnaire->page->add_to_page('formarea', $questionsform->render());
 }
 echo $questionnaire->renderer->render($questionnaire->page);
-echo $questionnaire->renderer->footer();
+echo $questionnaire->renderer->footer();