Neue Abwensenheitsmodi plus Upgrade Sitzplan

LehrerApp.Data/Repositories/AllRepositories.cs

@@ -107,6 +107,7 @@ public class SeatingPlanRepository(LiteDbContext db) : ISeatingPlanRepository
         plan.Name = plan.Name?.Trim() ?? "";
         plan.Room = plan.Room?.Trim() ?? "";
         plan.Assignments ??= [];
+        plan.ColumnGapWidths ??= [];
         if (plan.Name.Length == 0)
             throw new ArgumentException("Der Name des Sitzplans darf nicht leer sein.");
         if (plan.Rows is < 1 or > 10 || plan.Columns is < 1 or > 10)
@@ -114,6 +115,12 @@ public class SeatingPlanRepository(LiteDbContext db) : ISeatingPlanRepository
         if (db.Groups.FindById(plan.GroupId) is null)
             throw new InvalidOperationException("Die zugehörige Lerngruppe existiert nicht.");
 
+        plan.ColumnGapWidths = Enumerable.Range(0, Math.Max(0, plan.Columns - 1))
+            .Select(i => i < plan.ColumnGapWidths.Count && double.IsFinite(plan.ColumnGapWidths[i])
+                ? Math.Clamp(plan.ColumnGapWidths[i], 0, 300)
+                : 0)
+            .ToList();
+
         var duplicateName = db.SeatingPlans.Find(p => p.GroupId == plan.GroupId)
             .FirstOrDefault(p => p.Id != plan.Id
                 && string.Equals(p.Name, plan.Name, StringComparison.OrdinalIgnoreCase)