Add Hydra model for default delivery channels

src/protagonist/DLCS.HydraModel/DefaultDeliveryChannel.cs

@@ -0,0 +1,44 @@
+using Hydra;
+using Hydra.Model;
+using Newtonsoft.Json;
+
+namespace DLCS.HydraModel;
+
+[HydraClass(typeof(DefaultDeliveryChannelClass),
+    Description = "Assets that have not been assigned any delivery channels will use any matching " +
+                  "default delivery channels configured in the customer or containing space.",
+    UriTemplate = "/customers/{0}/defaultDeliveryChannels/{1}, /customers/{0}/spaces/{1}/defaultDeliveryChannels/{2}")]
+public class DefaultDeliveryChannel : DlcsResource
+{
+    [RdfProperty(Description = "The name of the DLCS delivery channel this is based on.",
+        Range = Names.XmlSchema.String, ReadOnly = false, WriteOnly = false)]
+    [JsonProperty(Order = 11, PropertyName = "channel")]
+    public string? Channel { get; set; }
+
+    [HydraLink(Description = "The policy assigned to this default delivery channel.",
+        Range = "vocab:deliveryChannelPolicy", ReadOnly = false, WriteOnly = false)]
+    [JsonProperty(Order = 12, PropertyName = "policy")]
+    public string? Policy { get; set; }
+
+    [HydraLink(Description = "The asset media type matched by this default delivery channel.",
+        Range = Names.XmlSchema.String, ReadOnly = false, WriteOnly = false)]
+    [JsonProperty(Order = 12, PropertyName = "mediaType")]
+    public string? MediaType { get; set; }
+}
+
+public class DefaultDeliveryChannelClass: Class
+{
+    string operationId = "_:defaultDeliveryChannel_";
+
+    public DefaultDeliveryChannelClass()
+    {
+        BootstrapViaReflection(typeof(DefaultDeliveryChannel));
+    }
+
+    public override void DefineOperations()
+    {
+        SupportedOperations = CommonOperations.GetStandardResourceOperations(
+            operationId, "Default Delivery Channel", Id,
+            "GET", "POST", "PUT", "DELETE");
+    }
+}