before i get in a deeper hole

Management.Web/Shared/Module/Assignment/AssignmentForm/AssignmentDescriptionEditor.razor

@@ -1,3 +1,4 @@
+@using Markdig
 
 @inject CoursePlanner planner
 
@@ -29,6 +30,7 @@
     .LocalCourse?
     .AssignmentTemplates
     .FirstOrDefault(t => t.Id == TemplateId);
+  public string Preview => Markdown.ToHtml(Description);
 
 }
 
@@ -109,17 +111,35 @@
 }
 else
 {
-  <label 
-    for="description"
-    class="form-label"
-  >
-    Description
-  </label>
-  <textarea 
-    id="description" 
-    class="form-control"
-    value="@Description"
-    @oninput="async (e) => 
-      await DescriptionChanged.InvokeAsync(e.Value?.ToString() ?? String.Empty)"
-  />
+  
+  <div class="row">
+    <div class="col">
+      <label 
+        for="description"
+        class="form-label"
+      >
+        Description
+      </label>
+    </div>
+    <div class="col">
+      HTML Preview
+
+    </div>
+  </div>
+  <div class="row">
+    <div class="col">
+      <textarea 
+        id="description" 
+        class="form-control"
+        value="@Description"
+        rows=12
+        @oninput="async (e) => 
+          await DescriptionChanged.InvokeAsync(e.Value?.ToString() ?? String.Empty)"
+      />
+    </div>
+    <div class="col">
+      @((MarkupString) Preview)
+
+    </div>
+  </div>
 }

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

@@ -3,8 +3,6 @@
 @inject CoursePlanner planner
 
 @code {
-  [Parameter]
-  [EditorRequired]
   public LocalModule Module { get; set; } = default!;
 
   [Parameter]
@@ -94,6 +92,11 @@
     rubric = newRubric;
     StateHasChanged();
   }
+  private void SetTypes(IEnumerable<string> newTypes)
+  { 
+    submissionTypes = newTypes;
+    StateHasChanged();
+  }
 } 
 
 <Modal @ref="AssignmentModal" OnHide="@(() => OnHide())">
@@ -139,7 +142,7 @@
       <RubricEditor Rubric="rubric" SetRubric="updateRubric" />
       <SubmissionTypeSelector
         Types="submissionTypes"
-        SetTypes="(newTypes) => submissionTypes = newTypes"
+        SetTypes="SetTypes"
       />
     </form>
   </Body>

Management.Web/Shared/Module/Assignment/AssignmentForm/RubricEditor.razor

@@ -22,6 +22,13 @@
     );
     StateHasChanged();
   }
+  private void removeItem()
+  {
+    SetRubric(
+      Rubric.Take(Rubric.Count() - 1)
+    );
+    StateHasChanged();
+  }
   private void editItem(RubricItem newItem)
   {
     var newRubric = Rubric.Select(i => i.Id == newItem.Id ? newItem : i);
@@ -71,6 +78,14 @@
 </ul>
 
 <div class="text-end my-1">
+  <button
+    @onclick:preventDefault="true"
+    @onclick="removeItem"
+    type="button"
+    class="btn btn-outline-danger"
+  >
+    - rubric item
+  </button>
   <button
     @onclick:preventDefault="true"
     @onclick="addItem"

Management.Web/Shared/Module/Assignment/AssignmentForm/SubmissionTypeSelector.razor

@@ -2,8 +2,16 @@
 
 @code 
 {
+  private IEnumerable<string> _types { get; set; } = Enumerable.Empty<string>();
   [Parameter, EditorRequired]
-  public IEnumerable<string> Types { get; set; } = Enumerable.Empty<string>();
+  public IEnumerable<string> Types {
+    get => _types;
+    set 
+    {
+      _types = value;
+      renderKey++;
+    }
+  }
 
   [Parameter, EditorRequired]
   public Action<IEnumerable<string>> SetTypes { get; set; } = (_) => {};
@@ -11,36 +19,47 @@
   {
     return type.ToString().Replace("_", "") + "switch";
   }
+
+  private bool discussionIsSelected
+  {
+    get => Types.FirstOrDefault(
+              t => t == SubmissionType.discussion_topic
+            ) != null;
+  }
+  private int renderKey {get; set; } = 1;
 }
 
 <h5>Submission Types</h5>
-<div class="row">
+<div class="row" @key="Types">
 
-@foreach (var submissionType in SubmissionType.AllTypes)
-{
-  <div class="col-4">
-    <div class="form-check form-switch">
-      <input 
-        class="form-check-input" 
-        type="checkbox"
-        role="switch" 
-        id="@getLabel(submissionType)"
-        checked="@Types.Contains(submissionType)"
-        @onchange="(e) => {
-          var isChecked = (bool)(e.Value ?? false);
-          if(isChecked)
-            SetTypes(Types.Append(submissionType));
-          else
-            SetTypes(Types.Where(t => t != submissionType));
-        }"
-      >
-      <label 
-        class="form-check-label" 
-        for="@getLabel(submissionType)"
-      >
-        @submissionType
-      </label>
+  @foreach (var submissionType in SubmissionType.AllTypes)
+  {
+    var isDiscussion = submissionType == SubmissionType.discussion_topic;
+    var allowedToBeChecked = !discussionIsSelected || isDiscussion;
+    <div class="col-4">
+      <div class="form-check form-switch">
+        <input
+          class="form-check-input" 
+          type="checkbox"
+          role="switch" 
+          id="@getLabel(submissionType)"
+          checked="@(Types.Contains(submissionType) && allowedToBeChecked)"
+          @onchange="(e) => {
+            var isChecked = (bool)(e.Value ?? false);
+            if(isChecked)
+              SetTypes(Types.Append(submissionType));
+            else
+              SetTypes(Types.Where(t => t != submissionType));
+          }"
+          disabled="@(discussionIsSelected && !isDiscussion)"
+        >
+        <label 
+          class="form-check-label" 
+          for="@getLabel(submissionType)"
+        >
+          @submissionType
+        </label>
+      </div>
     </div>
-  </div>
-}
+  }
 </div>