Update locallib.php: simplify code and improve automatic grading logic

locallib.php

@@ -59,11 +59,8 @@ class assign_feedback_dta extends assign_feedback_plugin {
             return null;
         }
 
-        $record = $DB->get_record(self::TABLE_DTA_SUMMARY,
+        return $DB->get_record(self::TABLE_DTA_SUMMARY,
             array("assignment_id" => $assignmentid, "submission_id" => $submissionid));
-        
-        // Convert false to null for type safety (get_record returns false if not found)
-        return $record ? $record : null;
     }
 
     /**
@@ -78,32 +75,30 @@ class assign_feedback_dta extends assign_feedback_plugin {
 
     /**
      * Check if this plugin is enabled.
-     * Returns true if the plugin is enabled in the assignment settings.
-     * This controls whether the feedback column is shown in the grading table.
+     * Return false to hide the feedback column from the grading table.
+     * Note: This does NOT disable the automatic grading functionality,
+     * which still works via view_summary().
      *
      * @return bool
      */
     public function is_enabled() {
-        // Check if this plugin is enabled in the assignment settings.
-        // Moodle stores this in the assignment instance configuration.
-        // The parent class method checks if the plugin is enabled for this assignment.
-        return parent::is_enabled();
+        return false; // Hide the feedback column completely
     }
 
     /**
      * Check if the feedback is empty.
      * 
-     * This method determines if the feedback column should show content.
-     * We return false to always show the column (even if empty) so that
-     * the automatic grading functionality can work via view_summary().
+     * CRITICAL: This is the method Moodle uses to determine if the feedback block should be shown!
+     * If this returns true, Moodle will NOT display the feedback block at all.
+     * 
+     * We always return true now since we don't want to show any UI in the feedback table.
      *
      * @param stdClass $grade The grade object
      * @return bool True if feedback is empty, false if feedback exists
      */
     public function is_empty(stdClass $grade) {
-        // Return false to always show the column, even if empty.
-        // This allows view_summary() to be called and automatic grading to work.
-        return false;
+        // Always return true to hide the feedback column completely
+        return true;
     }
 
     /**
@@ -135,17 +130,8 @@ class assign_feedback_dta extends assign_feedback_plugin {
             null,  // No description text - help only via help button
             null, array(0, 1));
         $mform->addHelpButton('assignfeedback_dta_gradeautomatically', 'grade_automatically', self::COMPONENT_NAME);
-        
         // Set default value from saved config, or 1 if not set yet.
-        // get_config() returns false if not set, so we need to handle that case.
-        $savedvalue = $this->get_config('gradeautomatically');
-        if ($savedvalue === false) {
-            // Value not set yet - use default of 1 (enabled)
-            $defaultvalue = 1;
-        } else {
-            // Value exists - use it (will be 0 or 1)
-            $defaultvalue = (int)$savedvalue;
-        }
+        $defaultvalue = $this->get_config('gradeautomatically', 1);
         $mform->setDefault('assignfeedback_dta_gradeautomatically', $defaultvalue);
         $mform->setType('assignfeedback_dta_gradeautomatically', PARAM_BOOL);
         
@@ -163,21 +149,13 @@ class assign_feedback_dta extends assign_feedback_plugin {
      */
     public function save_settings(stdClass $data) {
         // Check if the checkbox value exists in the form data.
-        // The checkbox is only present in the form if the plugin is enabled.
-        // advcheckbox sends the value directly (0 or 1) when checked/unchecked.
-        if (property_exists($data, 'assignfeedback_dta_gradeautomatically')) {
+        // advcheckbox returns the value directly (0 or 1), not as an array.
+        if (isset($data->assignfeedback_dta_gradeautomatically)) {
             // Get the old value before saving.
-            $oldvalue = $this->get_config('gradeautomatically');
-            if ($oldvalue === false) {
-                $oldvalue = 1; // Default to enabled if not set
-            } else {
-                $oldvalue = (int)$oldvalue;
-            }
-            
-            // Get the new value from form data (will be 0 or 1).
-            $value = (int)$data->assignfeedback_dta_gradeautomatically;
+            $oldvalue = $this->get_config('gradeautomatically', 1);
             
-            // Save the value.
+            // Value is set - save it (0 or 1)
+            $value = !empty($data->assignfeedback_dta_gradeautomatically) ? 1 : 0;
             $this->set_config('gradeautomatically', $value);
             
             // If the setting was changed from enabled (1) to disabled (0),
@@ -185,10 +163,11 @@ class assign_feedback_dta extends assign_feedback_plugin {
             if ($oldvalue == 1 && $value == 0) {
                 $this->clear_automatic_grades();
             }
+        } else {
+            // Checkbox was hidden (because DTA was not enabled), so it won't be in $data.
+            // In this case, we don't change the existing value - it stays as is.
+            // This is correct behavior: if DTA is disabled, we can't change this setting anyway.
         }
-        // If the checkbox is not in the form data, it means the plugin is not enabled,
-        // so we don't change the existing value (it stays as is).
-        
         return true;
     }
 
@@ -224,40 +203,6 @@ class assign_feedback_dta extends assign_feedback_plugin {
         }
     }
 
-    /**
-     * Clear only the "Final grade" column for a specific user.
-     * This keeps the grade displayed in DTA Feedback column but removes it from "Final grade".
-     *
-     * @param int $userid The user ID
-     * @return void
-     */
-    private function clear_user_final_grade(int $userid): void {
-        global $DB;
-        
-        $assignmentid = $this->assignment->get_instance()->id;
-        
-        // Get the grade_item for grade_grades table operations.
-        $gradeitem = \grade_item::fetch(array(
-            'itemtype' => 'mod',
-            'itemmodule' => 'assign',
-            'iteminstance' => $assignmentid,
-            'courseid' => $this->assignment->get_course()->id
-        ));
-        
-        if ($gradeitem) {
-            // Set finalgrade to NULL to clear "Final grade" column, but keep the record.
-            $DB->set_field('grade_grades', 'finalgrade', null, array(
-                'itemid' => $gradeitem->id,
-                'userid' => $userid
-            ));
-            // Also clear rawgrade to ensure nothing is displayed in "Final grade".
-            $DB->set_field('grade_grades', 'rawgrade', null, array(
-                'itemid' => $gradeitem->id,
-                'userid' => $userid
-            ));
-        }
-    }
-
     /**
      * Clear automatically set grade for a specific user.
      * Called when "Grade automatically" is disabled and view_summary() is called.
@@ -305,13 +250,7 @@ class assign_feedback_dta extends assign_feedback_plugin {
      * @return bool True if automatic grading is enabled
      */
     public function is_grade_automatically_enabled() {
-        // get_config() returns false if not set, so we need to handle that case.
-        $value = $this->get_config('gradeautomatically');
-        if ($value === false) {
-            // Value not set yet - default to enabled (1)
-            return true;
-        }
-        return (bool)$value;
+        return (bool)$this->get_config('gradeautomatically', 1); // Default to enabled
     }
 
     /**
@@ -691,6 +630,8 @@ class assign_feedback_dta extends assign_feedback_plugin {
      * @return string
      */
     public function view_summary(stdClass $grade, &$showviewlink) {
+        debugging('MOJEC view_summary() wurde ausgeführt', DEBUG_DEVELOPER);
+
         $showviewlink = false;
 
         // Get submission for grading calculations
@@ -703,40 +644,22 @@ class assign_feedback_dta extends assign_feedback_plugin {
             }
         }
 
-        // Calculate grade if submission exists
-        $output = '';
+        // Calculate and apply grade if submission exists
         if ($this->are_dta_tables_available() && !empty($submission) && !empty($grade) && isset($grade->userid) && !empty($grade->userid)) {
             $gradingservice = new grading_service($this->assignment);
             $gradesummary = $gradingservice->calculate_summary($submission, $dtasubmission);
-            
-            // Display the grade in the DTA Feedback column
-            if ($gradesummary['gradable'] && $gradesummary['hasdata']) {
-                $maxgrade = $gradesummary['maxgrade'];
-                $finalgrade = $gradesummary['finalgrade'];
-                
-                // Format: "42.36 / 100.00"
-                $output = html_writer::tag('div', 
-                    format_float($finalgrade, 2) . ' / ' . format_float($maxgrade, 2),
-                    array('class' => 'dta-feedback-grade')
-                );
-            }
-            
-            // Apply automatic grading if enabled
+            // Only apply grade automatically if the setting is enabled.
             if ($this->is_grade_automatically_enabled()) {
-                // Apply the grade to both assign_grades and grade_grades (Final grade column)
-                if ($gradesummary['gradable'] && $gradesummary['hasdata']) {
+                // Pass dtasubmission to allow checking if grade was manually modified
                 $gradingservice->apply_grade($grade->userid, $gradesummary, $dtasubmission);
-                    // Note: apply_grade() sets both assign_grades.grade and grade_grades.finalgrade
-                    // So the grade appears in both "Grade" column and "Final grade" column
-                }
             } else {
-                // If automatic grading is disabled, only show grade in DTA Feedback column
-                // Clear any automatically set grades so "Final grade" stays empty
+                // If automatic grading is disabled, clear any automatically set grades for this user.
                 $this->clear_user_automatic_grade($grade->userid);
             }
         }
 
-        return $output;
+        // Return empty string - no feedback button needed
+        return '';
     }