Use new Id

src/Blob/Controllers/BlobController.cs

@@ -6,6 +6,7 @@ using Coscine.Database.Models;
 using Coscine.Database.Util;
 using Coscine.Logging;
 using Coscine.Metadata;
+using Coscine.Metadata.Util;
 using Coscine.ResourceTypes;
 using Coscine.ResourceTypes.Base.Models;
 using Microsoft.AspNetCore.Authorization;
@@ -61,9 +62,39 @@ namespace Coscine.Api.Blob.Controllers
         /// </summary>
         /// <param name="resourceId">Id of the resource</param>
         /// <param name="path">Path to file</param>
+        /// <param name="retrieve">Is retrieve action?</param>
         /// <returns> Uri </returns>
-        public Uri GenerateId(string resourceId, string path)
+        public Uri GenerateId(string resourceId, string path, bool retrieve = false)
         {
+            if (!path.StartsWith("/"))
+            {
+                path = "/" + path;
+            }
+
+            var currentId = _rdfStoreConnector.GetMetadataId(resourceId, path);
+
+            if (currentId == null && retrieve)
+            {
+                return GenerateOldId(resourceId, path);
+            }
+
+            var newVersionGraph = new CustomUri($"https://purl.org/coscine/resources/{resourceId}{path}/@type=metadata&version={VersionUtil.GetNewVersion()}");
+            return newVersionGraph;
+        }
+
+        /// <summary>
+        /// Generates Id
+        /// </summary>
+        /// <param name="resourceId">Id of the resource</param>
+        /// <param name="path">Path to file</param>
+        /// <returns> Uri </returns>
+        public Uri GenerateOldId(string resourceId, string path)
+        {
+            if (!path.StartsWith("/"))
+            {
+                path = "/" + path;
+            }
+
             return new CustomUri($"https://hdl.handle.net/{_prefix}/{resourceId}@path={Uri.EscapeDataString(path)}");
         }