New: Included metadata in the resource view

coscine/issues#554

src/Project/Controllers/MetadataController.cs

@@ -134,9 +134,28 @@ namespace Coscine.Api.Project.Controllers
 
             var user = _authenticator.GetUser();
             var resource = _resourceModel.GetById(Guid.Parse(resourceId));
-
+                
             if (_resourceModel.HasAccess(user, resource, UserRoles.Owner, UserRoles.Member))
             {
+                json[graphName]["http://www.w3.org/1999/02/22-rdf-syntax-ns#type"] = new JArray
+                {
+                    new JObject
+                    {
+                        ["value"] = resource.ApplicationProfile.Substring(0, resource.ApplicationProfile.Length-1),
+                        ["type"] = "uri"
+                    }
+                };
+                // throw bad request if empty node value is detected
+                JToken root = json.First.First;
+                foreach (var node in root)
+                {
+                    string nodeValue = node.First.First["value"].ToString().ToLower();
+                    if (String.IsNullOrEmpty(nodeValue))
+                    {
+                        throw new ArgumentException("Empty values in application profile are not accepted.");
+                    }
+                }
+
                 var graph = new Graph();
                 graph.LoadFromString(json.ToString(), new RdfJsonParser());