am syncing assignment groups

Management/Features/Configuration/Synchronization/AssignemntGroupSyncronizationExtensions.cs

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+using CanvasModel.Assignments;
+using CanvasModel.Modules;
+using LocalModels;
+using Management.Services.Canvas;
+
+namespace Management.Planner;
+
+public static partial class AssignmentGroupSyncronizationExtensions
+{
+  internal static async Task<IEnumerable<LocalAssignmentGroup>> EnsureAllAssignmentGroupsExistInCanvas(
+    this LocalCourse localCourse,
+    ulong courseCanvasId,
+    IEnumerable<CanvasAssignmentGroup> canvasAssignmentGroups,
+    CanvasService canvas
+  )
+  {
+    var canvasAssignmentGroupIds = canvasAssignmentGroups.Select(g => g.Id).ToArray();
+    var assignmentGroups = await Task.WhenAll((Task<LocalAssignmentGroup>[])localCourse.AssignmentGroups.Select(
+      async assignmentGroup =>
+      {
+        var canvasGroupWithSameName = canvasAssignmentGroups.FirstOrDefault(
+          cg => cg.Name.Equals(assignmentGroup.Name)
+        );
+        if (canvasGroupWithSameName == null)
+          return await canvas.AssignmentGroups.Create(courseCanvasId, assignmentGroup);
+
+        var correctGroup = assignmentGroup with { CanvasId = canvasGroupWithSameName.Id };
+
+        var needsUpdate = canvasGroupWithSameName.GroupWeight != correctGroup.Weight;
+
+        if (needsUpdate)
+          await canvas.AssignmentGroups.Update(courseCanvasId, assignmentGroup);
+
+        return correctGroup;
+      }
+    ).ToArray());
+
+    return assignmentGroups;
+  }
+}