V13: Delivery API composite id handler (#15305)

* Implement DeliveryApiCompositeIdHandler

* Replace duplicate decomposing with Handler instead

* Add obsolete messages

* Make Id integer instead of string

* Move from examine to core

---------

Co-authored-by: Zeegaan <nge@umbraco.dk>

src/Umbraco.Core/DeliveryApi/DeliveryApiCompositeIdHandler.cs

@@ -0,0 +1,21 @@
+namespace Umbraco.Cms.Core.DeliveryApi;
+
+public class DeliveryApiCompositeIdHandler : IDeliveryApiCompositeIdHandler
+{
+    public string IndexId(int id, string culture) => $"{id}|{culture}";
+
+    public DeliveryApiIndexCompositeIdModel Decompose(string indexId)
+    {
+        var parts = indexId.Split(Constants.CharArrays.VerticalTab);
+        if (parts.Length == 2 && int.TryParse(parts[0], out var id))
+        {
+            return new DeliveryApiIndexCompositeIdModel
+            {
+                Id = id,
+                Culture = parts[1],
+            };
+        }
+
+        return new DeliveryApiIndexCompositeIdModel();
+    }
+}

src/Umbraco.Core/DeliveryApi/DeliveryApiIndexCompositeIdModel.cs

@@ -0,0 +1,8 @@
+namespace Umbraco.Cms.Core.DeliveryApi;
+
+public class DeliveryApiIndexCompositeIdModel
+{
+    public int? Id { get; set; }
+
+    public string? Culture { get; set; }
+}

src/Umbraco.Core/DeliveryApi/IDeliveryApiCompositeIdHandler.cs

@@ -0,0 +1,8 @@
+namespace Umbraco.Cms.Core.DeliveryApi;
+
+public interface IDeliveryApiCompositeIdHandler
+{
+    string IndexId(int id, string culture);
+
+    DeliveryApiIndexCompositeIdModel Decompose(string indexId);
+}