can drag between modules

.vscode/launch.json

@@ -1,35 +0,0 @@
-{
-  "version": "0.2.0",
-  "configurations": [
-    {
-      // Use IntelliSense to find out which attributes exist for C# debugging
-      // Use hover for the description of the existing attributes
-      // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
-      "name": ".NET Core Launch (web)",
-      "type": "coreclr",
-      "request": "launch",
-      "preLaunchTask": "build",
-      // If you have changed target frameworks, make sure to update the program path.
-      "program": "${workspaceFolder}/Management.Web/bin/Debug/net7.0/Management.Web.dll",
-      "args": [],
-      "cwd": "${workspaceFolder}/Management.Web",
-      "stopAtEntry": false,
-      // Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
-      "serverReadyAction": {
-        "action": "openExternally",
-        "pattern": "\\bNow listening on:\\s+(https?://\\S+)"
-      },
-      "env": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      },
-      "sourceFileMap": {
-        "/Views": "${workspaceFolder}/Views"
-      }
-    },
-    {
-      "name": ".NET Core Attach",
-      "type": "coreclr",
-      "request": "attach"
-    }
-  ]
-}

.vscode/tasks.json

@@ -1,41 +0,0 @@
-{
-  "version": "2.0.0",
-  "tasks": [
-    {
-      "label": "build",
-      "command": "dotnet",
-      "type": "process",
-      "args": [
-        "build",
-        "${workspaceFolder}/Management.Web/Management.Web.csproj",
-        "/property:GenerateFullPaths=true",
-        "/consoleloggerparameters:NoSummary"
-      ],
-      "problemMatcher": "$msCompile"
-    },
-    {
-      "label": "publish",
-      "command": "dotnet",
-      "type": "process",
-      "args": [
-        "publish",
-        "${workspaceFolder}/Management.Web/Management.Web.csproj",
-        "/property:GenerateFullPaths=true",
-        "/consoleloggerparameters:NoSummary"
-      ],
-      "problemMatcher": "$msCompile"
-    },
-    {
-      "label": "watch",
-      "command": "dotnet",
-      "type": "process",
-      "args": [
-        "watch",
-        "run",
-        "--project",
-        "${workspaceFolder}/Management.Web/Management.Web.csproj"
-      ],
-      "problemMatcher": "$msCompile"
-    }
-  ]
-}

Management.Web/Shared/Module/Assignment/AssignmentDetails.razor

@@ -25,32 +25,68 @@
     planner.StateHasChanged -= reload;
   }
   private Modal? assignmentEditorModal {get; set;}
-  private void HandleDragStart()
+
+  private void DropCallback (DateTime? dropDate, LocalModule? module) 
   {
-    dragContainer.DropCallback = (DateTime dropDate) => {
+    @* only supports changing date or module, not both *@
-      if (planner.LocalCourse != null)
+    if (planner.LocalCourse == null) return;
+    if (module == null)
     {
-        var newCourse = planner.LocalCourse with 
+      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 moduleWithUpdatedAssignment = currentModule with 
       {
-          Modules = planner.LocalCourse.Modules.Select(m => 
+        Assignments = currentModule.Assignments.Select(a => 
-            m.Name != Module.Name
-              ? m
-              : m with 
-              {
-                Assignments = Module.Assignments.Select(a => 
           a.id != Assignment.id
           ? a
           : a with 
           {
-                    due_at=dropDate
+            due_at=dropDate ?? Assignment.due_at
-                  }
-                )
           }
         )
       };
+      var updatedModules = planner.LocalCourse.Modules
+        .Select(m => 
+          m.Name == moduleWithUpdatedAssignment.Name 
+            ? moduleWithUpdatedAssignment 
+            : m
+        );
+      var newCourse = planner.LocalCourse with 
+      {
+        Modules = updatedModules
+      };
       planner.LocalCourse = newCourse;
     } 
+    else
+    {
+      var newModules = planner.LocalCourse.Modules.Select(m => 
+        m.Name != module.Name
+          ? m with 
+          {
+            Assignments = m.Assignments.Where(a => a.id != Assignment.id).DistinctBy(a => a.id)
+          }
+          : m with 
+          {
+            Assignments = m.Assignments.Append(Assignment).DistinctBy(a => a.id)
+          }
+      );
+
+      var newCourse = planner.LocalCourse with 
+      {
+        Modules = newModules
       };
+      planner.LocalCourse = newCourse;
+    }
+  }
+  private void HandleDragStart()
+  {
+    dragContainer.DropCallback = DropCallback;
   }
 
   private void HandleDragEnd()

Management.Web/Shared/Module/ModuleDetail.razor

@@ -4,10 +4,12 @@
 
 @inject CoursePlanner configurationManagement
 @inject CoursePlanner planner
+@inject AssignmentDragContainer dragContainer
 
 @code {
   [Parameter, EditorRequired]
   public LocalModule Module { get; set; } = default!;
+  private bool dragging {get; set;} = false;
 
   protected override void OnInitialized()
   {
@@ -26,11 +28,33 @@
     get => Module.Name.Replace(" ", "") + "-AccordionItem";
   }
 
+  void OnDragEnter() {
+    dragging = true;
+  }
+  void OnDragLeave() {
+    dragging = false;
   }
 
-<div class="accordion-item">
+  void OnDrop()
+  {
+    dragging = false;
+    if(dragContainer.DropCallback == null){
+      System.Console.WriteLine("no drop callback set");
+      return;
+    }
+    dragContainer.DropCallback?.Invoke(null, Module);
+  }
+}
 
-  <h2 class="accordion-header">
+<div 
+  class="@("accordion-item " + (dragging ? "" : ""))"
+  @ondrop="@(() => OnDrop())"
+  @ondragenter="OnDragEnter"
+  @ondragleave="OnDragLeave"
+  ondragover="event.preventDefault();"
+>
+
+  <h2 class="@("accordion-header ")">
     <button 
       class="accordion-button" 
       type="button" 

Management.Web/Shared/Semester/AssignmentInDay.razor

@@ -7,45 +7,67 @@
   [EditorRequired]
   public LocalAssignment Assignment { get; set; } = new();
 
-  private void HandleDragStart()
+  private void DropCallback (DateTime? dropDate, LocalModule? module) 
   {
-    dragContainer.DropCallback = (DateTime dropDate) => {
+    @* only supports changing date or module, not both *@
-      var module = planner
+    if (planner.LocalCourse == null) return;
-        .LocalCourse?
+    if (module == null)
+    {
+      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");
-      if (module == null)
+      var moduleWithUpdatedAssignment = currentModule with 
       {
-        Console.WriteLine("module is null");
+        Assignments = currentModule.Assignments.Select(a => 
-        return;
-      }
-      if (planner.LocalCourse != null)
-      {
-        var newCourse = planner.LocalCourse with 
-        {
-          Modules = planner.LocalCourse.Modules.Select(m => 
-            m.Name != module.Name
-              ? m
-              : m with 
-              {
-                Assignments = module.Assignments.Select(a => 
           a.id != Assignment.id
           ? a
           : a with 
           {
-                    due_at=dropDate
+            due_at=dropDate ?? Assignment.due_at
-                  }
-                )
           }
         )
       };
+      var updatedModules = planner.LocalCourse.Modules
+        .Select(m => 
+          m.Name == moduleWithUpdatedAssignment.Name 
+            ? moduleWithUpdatedAssignment 
+            : m
+        );
+      var newCourse = planner.LocalCourse with 
+      {
+        Modules = updatedModules
+      };
       planner.LocalCourse = newCourse;
     } 
+    else
+    {
+      var newModules = planner.LocalCourse.Modules.Select(m => 
+        m.Name != module.Name
+          ? m with 
+          {
+            Assignments = m.Assignments.Where(a => a.id != Assignment.id).DistinctBy(a => a.id)
+          }
+          : m with 
+          {
+            Assignments = m.Assignments.Append(Assignment).DistinctBy(a => a.id)
+          }
+      );
+
+      var newCourse = planner.LocalCourse with 
+      {
+        Modules = newModules
       };
+      planner.LocalCourse = newCourse;
+    }
+  }
+  private void HandleDragStart()
+  {
+    dragContainer.DropCallback = DropCallback;
   }
 
   private void HandleDragEnd()

Management.Web/Shared/Semester/Day.razor

@@ -86,7 +86,7 @@
     if(date != null)
     {
       DateTime d = date ?? throw new Exception("should not get here, error converting date from nullable");
-      dragContainer.DropCallback?.Invoke(d);
+      dragContainer.DropCallback?.Invoke(d, null);
     }
   }
 } 

Management.Web/Utils/AssignmentDragContainer.cs

@@ -1,4 +1,4 @@
 public class AssignmentDragContainer
 {
-  public Action<DateTime>? DropCallback { get; set; }
+  public Action<DateTime?, LocalModule?>? DropCallback { get; set; }
 }