don't display dummy solutions in logs, fixes #64

controllers/solutions.php

@@ -905,7 +905,7 @@ class SolutionsController extends StudipController
         Sidebar::get()->addWidget($widget);
 
         $widget = new SelectWidget(_vips('Versionen'), $this->url_for('solutions/edit_solution', compact('assignment_id', 'exercise_id', 'solver_id', 'view')), 'solution_id');
-        $version = $solution->id ? date('d.m.Y, H:i', strtotime($solution->time)) : _vips('nicht abgegeben');
+        $version = $solution->isSubmitted() ? date('d.m.Y, H:i', strtotime($solution->time)) : _vips('nicht abgegeben');
         $element = new SelectElement(0, sprintf(_vips('Aktuelle Version: %s'), $version), !$archived_id);
         $widget->addElement($element);
 
@@ -1059,7 +1059,6 @@ class SolutionsController extends StudipController
             $solution = new VipsSolution();
             $solution->exercise_id = Request::int('exercise_id');
             $solution->assignment_id = Request::int('assignment_id');
-            $solution->time = date('Y-m-d H:i:s');
             $solution->user_id = $solver_id;
         }
 

lib/VipsAssignmentAttempt.php

@@ -57,13 +57,15 @@ class VipsAssignmentAttempt extends SimpleORMap
         ];
 
         foreach ($solutions as $solution) {
-            $logs[] = [
-                'label'      => sprintf(_vips('Abgabe Aufgabe %d'), $position[$solution->exercise_id]),
-                'time'       => $solution->time,
-                'ip_address' => $solution->ip_address,
-                'session_id' => $solution->options['session_id'],
-                'archived'   => $solution->isArchived(),
-            ];
+            if ($solution->isSubmitted()) {
+                $logs[] = [
+                    'label'      => sprintf(_vips('Abgabe Aufgabe %d'), $position[$solution->exercise_id]),
+                    'time'       => $solution->time,
+                    'ip_address' => $solution->ip_address,
+                    'session_id' => $solution->options['session_id'],
+                    'archived'   => $solution->isArchived(),
+                ];
+            }
         }
 
         if ($end_time && $end_time < date('Y-m-d H:i:s')) {

lib/VipsSolution.php

@@ -104,6 +104,14 @@ class VipsSolution extends SimpleORMap
         return $this->response == $this->exercise->defaultResponse() && count($this->files) == 0;
     }
 
+    /**
+     * Check if this solution has been submitted (is not a dummy solution).
+     */
+    public function isSubmitted()
+    {
+        return $this->id && $this->time !== '0000-00-00 00:00:00';
+    }
+
     /**
      * Return the total number of solutions (including archived ones)
      * submitted by the same user for this exercise.