started creating module ui, workign on assignments

Management/Features/Modules/IModuleManager.cs

@@ -0,0 +1,6 @@
+public interface IModuleManager
+{
+  IEnumerable<CourseModule> Modules { get; }
+  public void AddModule(CourseModule newModule);
+  public void AddAssignment(int moduleIndex, LocalAssignment assignment);
+}

Management/Features/Modules/ModuleManager.cs

@@ -0,0 +1,22 @@
+public class ModuleManager : IModuleManager
+{
+  public IEnumerable<CourseModule> Modules { get; internal set; } = new CourseModule[] { };
+
+  public void AddAssignment(int moduleIndex, LocalAssignment assignment)
+  {
+    var newAssignments = Modules.ElementAt(moduleIndex).Assignments.Append(assignment);
+    var newModule = Modules.ElementAt(moduleIndex) with { Assignments = newAssignments };
+    if (newModule == null)
+      throw new Exception($"cannot get module at index {moduleIndex}");
+
+    Modules = Modules
+      .Take(moduleIndex)
+      .Append(newModule)
+      .Concat(Modules.Skip(moduleIndex + 1));
+  }
+
+  public void AddModule(CourseModule newModule)
+  {
+    Modules = Modules.Append(newModule);
+  }
+}

Management/Models/CourseModule.cs

@@ -0,0 +1,11 @@
+using System.ComponentModel.DataAnnotations;
+
+public record CourseModule(
+  [property: Required]
+  [property: StringLength(50, ErrorMessage = "Name too long (50 character limit).")]
+  string Name,
+  IEnumerable<LocalAssignment>? Assignments
+)
+{
+  public IEnumerable<LocalAssignment> Assignments = Assignments ?? new LocalAssignment[] { };
+}

Management/Models/LocalAssignment.cs

@@ -0,0 +1,31 @@
+public record RubricItem(
+  int Points,
+  string Label
+);
+
+public enum SubmissionType
+{
+  online_quiz,
+  none,
+  on_paper,
+  discussion_topic,
+  external_tool,
+  online_upload,
+  online_text_entry,
+  online_url,
+  media_recording,
+  student_annotation,
+}
+
+public record LocalAssignment
+{
+  public string name { get; init; } = "";
+  public string description { get; init; } = "";
+  public bool published { get; init; }
+  public bool lock_at_due_date { get; init; }
+  public IEnumerable<RubricItem> rubric { get; init; } = new RubricItem[] { };
+  public DateTime? lock_at { get; init; }
+  public DateTime due_at { get; init; }
+  public int points_possible { get; init; }
+  public IEnumerable<SubmissionType> submission_types { get; init; } = new SubmissionType[] { };
+}