DeliveryPart: Add Unloading type instead of IsLesewagen

Elwig/Models/Entities/DeliveryPart.cs

@@ -9,6 +9,11 @@ using System.Text.Json.Nodes;
 namespace Elwig.Models.Entities {
     [Table("delivery_part"), PrimaryKey("Year", "DId", "DPNr")]
     public class DeliveryPart : IDelivery {
+
+        public const string Dumper = "dumper";
+        public const string Pumped = "pumped";
+        public const string Box = "box";
+
         [Column("year")]
         public int Year { get; set; }
 
@@ -86,12 +91,27 @@ namespace Elwig.Models.Entities {
         [Column("hand_picked")]
         public bool? IsHandPicked { get; set; }
 
-        [Column("lesewagen")]
-        public bool? IsLesewagen { get; set; }
-
         [Column("gebunden")]
         public bool? IsGebunden { get; set; }
 
+        [Column("unloading")]
+        public string? Unloading { get; set; }
+        [NotMapped]
+        public bool IsDumper {
+            get => Unloading == Dumper;
+            set => Unloading = value ? Dumper : Unloading;
+        }
+        [NotMapped]
+        public bool IsPumped {
+            get => Unloading == Pumped;
+            set => Unloading = value ? Pumped : Unloading;
+        }
+        [NotMapped]
+        public bool IsBox {
+            get => Unloading == Box;
+            set => Unloading = value ? Box : Unloading;
+        }
+
         [Column("temperature")]
         public double? Temperature { get; set; }