Init

Server/Model/InvoiceModel.cs

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+namespace Server.Model
+{
+    public class InvoiceModel
+    {
+        public bool DeletionAllowed { get; set; }
+        
+        public string? InvoiceId { get; set; }
+        public DateTime IssueDate { get; set; } = DateTime.Today;
+
+        public Address? Seller { get; set; }
+        public Address? Customer { get; set; }
+
+        public List<OrderItem> Items { get; set; } = new();
+        public string? Comment { get; set; }
+
+        public PaymentData? PaymentData { get; set; }
+        
+        public double TotalNetto => Items?.Sum(x => x.PriceNetto*x.Quantity) ?? 0d;
+    }
+
+    public class PaymentData
+    {
+        public string BankName { get; set; }
+        public string Iban { get; set; }
+        public string Bic { get; set; }
+    }
+
+    public class OrderItem
+    {
+        public string Name { get; set; }
+        public double PriceNetto { get; set; }
+        public double PriceBrutto
+        {
+            get
+            {
+                switch (TaxType)
+                {
+                    case TaxType.Tax19:
+                    default:
+                        return PriceNetto * 1.19;
+                        break;
+                    case TaxType.Tax7:
+                        return PriceNetto *1.07;
+                        break;
+                }
+            }
+        }
+
+        public double Quantity { get; set; } = 1d;
+        public TaxType TaxType { get; set; } = TaxType.Tax19;
+        public string? Description { get; set; }
+    }
+
+    public class Address
+    {
+        public RecordState State { get; set; }
+        public string? Name { get; set; }
+        public string? Name2 { get; set; }
+        public string? Street { get; set; }
+        public string? City { get; set; }
+        public string? Zip { get; set; }
+        public string? Email { get; set; }
+        public string? Phone { get; set; }
+        public string? Web { get; set; }
+        public string? TaxId { get; set; }
+
+        public override string ToString() => $"{Name} - {Street} - {Zip} {City}";
+    }
+
+    public enum TaxType
+    {
+        Tax19, Tax7
+    }
+}