can create and drag and drop pages

Management/Models/Local/Assignment/LocalAssignment.cs

@@ -6,7 +6,7 @@ using YamlDotNet.Serialization;
 
 namespace LocalModels;
 
-public record LocalAssignment
+public record LocalAssignment: IModuleItem
 {
   private string _name = "";
   public string Name
@@ -28,6 +28,7 @@ public record LocalAssignment
   public IEnumerable<RubricItem> Rubric { get; init; } = Array.Empty<RubricItem>();
   public int PointsPossible => Rubric.Sum(r => r.IsExtraCredit ? 0 : r.Points);
 
+
   public string GetDescriptionHtml()
   {
     return Markdig.Markdown.ToHtml(Description);

Management/Models/Local/IModuleItem.cs

@@ -0,0 +1,9 @@
+
+namespace LocalModels;
+
+public interface IModuleItem
+{
+  public string Name { get; init; }
+  public DateTime DueAt { get; init; }
+
+}

Management/Models/Local/LocalCoursePage.cs

@@ -1,14 +1,14 @@
 namespace LocalModels;
 
-public record LocalCoursePage
+public record LocalCoursePage: IModuleItem
 {
   public required string Name { get; init; }
   public required string Text { get; set; }
-  public DateTime? DueDateForOrdering { get; init; }
+  public DateTime DueAt { get; init; }
 
   public string ToMarkdown()
   {
-    var printableDueDate = DueDateForOrdering.ToString()?.Replace('\u202F', ' ');
+    var printableDueDate = DueAt.ToString()?.Replace('\u202F', ' ');
     var settingsMarkdown = $"Name: {Name}\n"
       + $"DueDateForOrdering: {printableDueDate}\n"
       + "---\n";
@@ -20,9 +20,9 @@ public record LocalCoursePage
     var name = MarkdownUtils.ExtractLabelValue(rawSettings, "Name");
     var rawDate = MarkdownUtils.ExtractLabelValue(rawSettings, "DueDateForOrdering");
 
-    DateTime? parsedDate = DateTime.TryParse(rawDate, out DateTime parsedDueAt)
+    DateTime parsedDate = DateTime.TryParse(rawDate, out DateTime parsedDueAt)
       ? parsedDueAt
-      : null;
+      : throw new LocalPageMarkdownParseException($"could not parse due date: {rawDate}");
 
 
     var text = pageMarkdown.Split("---\n")[1];
@@ -30,7 +30,7 @@ public record LocalCoursePage
     return new LocalCoursePage
     {
       Name = name,
-      DueDateForOrdering = parsedDate,
+      DueAt = parsedDate,
       Text = text
     };
   }

Management/Models/Local/Quiz/LocalQuiz.cs

@@ -3,7 +3,7 @@ using YamlDotNet.Serialization;
 
 namespace LocalModels;
 
-public record LocalQuiz
+public record LocalQuiz: IModuleItem
 {
   public required string Name { get; init; }
   public required string Description { get; init; }
@@ -27,7 +27,7 @@ public record LocalQuiz
       .CanvasId;
 
   public string GetDescriptionHtml() => Markdig.Markdown.ToHtml(Description);
-  
+
   public string ToYaml()
   {
     var serializer = new SerializerBuilder().DisableAliases().Build();
@@ -100,7 +100,7 @@ Description: {Description}
 
 
     var rawLockAt = extractLabelValue(settings, "LockAt");
-    DateTime? lockAt = DateTime.TryParse(rawLockAt, out DateTime parsedLockAt) 
+    DateTime? lockAt = DateTime.TryParse(rawLockAt, out DateTime parsedLockAt)
       ? parsedLockAt
       : null;
 
@@ -153,6 +153,6 @@ public class QuizMarkdownParseException : Exception
 {
   public QuizMarkdownParseException(string message): base(message)
   {
-    
+
   }
-}
+}