refactored assignment drop logic

Management.Web/Shared/Semester/Day/AssignmentInDay.razor

@@ -1,12 +1,12 @@
+@using Management.Web.Shared.Module.Assignment
 
 @inject DragContainer dragContainer
 @inject CoursePlanner planner
 @inject AssignmentEditorContext assignmentContext
 
+@inherits DroppableAssignment
+
 @code {
-  [Parameter]
-  [EditorRequired]
-  public LocalAssignment Assignment { get; set; } = new();
   protected override void OnInitialized()
   {
     planner.StateHasChanged += reload;
@@ -20,84 +20,6 @@
     planner.StateHasChanged -= reload;
   }
 
-  private void dropOnDate(DateTime dropDate)
-  {
-
-    if (planner.LocalCourse == null) return;
-    var currentModule = planner
-      .LocalCourse
-      .Modules
-      .First(m => 
-        m.Assignments
-          .Select(a => a.Id)
-          .Contains(Assignment.Id)
-      ) ?? throw new Exception("in day callback, could not find module");
-
-    var defaultDueTimeDate = new DateTime(
-      year: dropDate.Year,
-      month: dropDate.Month,
-      day: dropDate.Day,
-      hour: planner.LocalCourse.DefaultDueTime.Hour,
-      minute: planner.LocalCourse.DefaultDueTime.Minute,
-      second: 0
-    );
-
-    var moduleWithUpdatedAssignment = currentModule with 
-    {
-      Assignments = currentModule.Assignments.Select(a => 
-        a.Id != Assignment.Id
-        ? a
-        : a with 
-        {
-          DueAt=defaultDueTimeDate
-        }
-      )
-    };
-    var updatedModules = planner.LocalCourse.Modules
-      .Select(m => 
-        m.Name == moduleWithUpdatedAssignment.Name 
-          ? moduleWithUpdatedAssignment 
-          : m
-      );
-    var newCourse = planner.LocalCourse with 
-    {
-      Modules = updatedModules
-    };
-    planner.LocalCourse = newCourse;
-  }
-  private void dropOnModule(LocalModule module)
-  {
-    if (planner.LocalCourse == null) return;
-    var newModules = planner.LocalCourse.Modules.Select(m => 
-      m.Name != module.Name
-        ? m with 
-        {
-          Assignments = m.Assignments.Where(a => a.Id != Assignment.Id)
-        }
-        : m with 
-        {
-          Assignments = m.Assignments.Append(Assignment)
-        }
-    );
-
-    var newCourse = planner.LocalCourse with 
-    {
-      Modules = newModules
-    };
-    planner.LocalCourse = newCourse;
-  }
-
-  private void DropCallback (DateTime? dropDate, LocalModule? module) 
-  {
-    if (module == null)
-    {
-      dropOnDate(dropDate ?? Assignment.DueAt);
-    } 
-    else
-    {
-      dropOnModule(module);
-    }
-  }
   private void HandleDragStart()
   {
     dragContainer.DropCallback = DropCallback;