added quiz popup form and displaying on month

Management/Features/Configuration/AssignmentEditorContext.cs

@@ -14,12 +14,11 @@ public class AssignmentEditorContext
   private LocalAssignment? _assignment;
   public LocalAssignment? Assignment
   {
-    get  =>_assignment;
+    get => _assignment;
     set
     {
       _assignment = value;
       StateHasChanged?.Invoke();
-      Console.WriteLine("new assignment");
     }
   }
 
@@ -30,7 +29,7 @@ public class AssignmentEditorContext
       var currentModule =
         planner.LocalCourse.Modules.First(
           m => m.Assignments.Select(a => a.Id).Contains(newAssignment.Id)
-        ) ?? throw new Exception("could not find current module in assignment description form");
+        ) ?? throw new Exception("could not find current module in assignment editor context");
 
       var updatedModules = planner.LocalCourse.Modules
         .Select(

Management/Features/Configuration/QuizEditorContext.cs

@@ -0,0 +1,50 @@
+using LocalModels;
+using Management.Planner;
+
+public class QuizEditorContext
+{
+  public event Action? StateHasChanged;
+  private CoursePlanner planner { get; }
+
+  public QuizEditorContext(CoursePlanner planner)
+  {
+    this.planner = planner;
+  }
+
+  private LocalQuiz? _quiz;
+  public LocalQuiz? Quiz
+  {
+    get => _quiz;
+    set
+    {
+      _quiz = value;
+      StateHasChanged?.Invoke();
+    }
+  }
+
+  public void SaveQuiz(LocalQuiz newQuiz)
+  {
+    if (planner.LocalCourse != null)
+    {
+      var currentModule =
+        planner.LocalCourse.Modules.First(m => m.Quizzes.Select(q => q.Id).Contains(newQuiz.Id))
+        ?? throw new Exception("could not find current module in quiz editor context");
+
+      var updatedModules = planner.LocalCourse.Modules
+        .Select(
+          m =>
+            m.Name == currentModule.Name
+              ? currentModule with
+              {
+                Quizzes = currentModule.Quizzes
+                  .Select(q => q.Id == newQuiz.Id ? newQuiz : q)
+                  .ToArray()
+              }
+              : m
+        )
+        .ToArray();
+
+      planner.LocalCourse = planner.LocalCourse with { Modules = updatedModules };
+    }
+  }
+}