Add explicit warning about manual grades questions.

Author: sangwinc

lang/en/qtype_stack.php

@@ -420,6 +420,7 @@
 $string['moodleerrors'] = 'You have errors related to Moodle\'s basic question setup.';
 $string['stackerrors'] = 'You have errors in your question.';
 $string['markedasbroken'] = 'The question has been marked as broken and will not be accessible to students.';
+$string['alwaysmanuallygrade'] = 'This question is always manually graded.';
 
 // Strings used by input elements.
 $string['studentinputtoolong'] = 'Your input is longer than permitted by STACK.';

question.php

@@ -1950,7 +1950,18 @@ public function validate_warnings($errors = false) {
             $warnings[] = stack_string_error('questionbroken');
         }
 
-        // 4. Language warning checks.
+        // 4. Warn if always maually graded.
+        $manualgraded = false;
+        if (!empty($this->inputs)) {
+            foreach ($this->inputs as $input) {
+                $manualgraded = $manualgraded || $input->get_extra_option('manualgraded');
+            }
+        }
+        if ($manualgraded) {
+            $warnings[] = stack_string_error('alwaysmanuallygrade');
+        }
+
+        // 5. Language warning checks.
         // Put language warning checks last (see guard clause below).
         // Check multi-language versions all have the same languages.
         $ml = new stack_multilang();

stack/input/freetext/freetext.class.php

@@ -33,7 +33,7 @@ class stack_freetext_input extends stack_string_input {
         'hideanswer' => false,
         'allowempty' => false,
         'validator' => false,
-        'manualgraded' => false,
+        'manualgraded' => true,
     ];
 
     /**