Initial state

samples/angular/MusicStore/Infrastructure/ApiResult.cs

@@ -0,0 +1,63 @@
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.Mvc.ModelBinding;
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace MusicStore.Infrastructure
+{
+    public class ApiResult : ActionResult
+    {
+        public ApiResult(ModelStateDictionary modelState)
+            : this()
+        {
+            if (modelState.Any(m => m.Value.Errors.Count > 0))
+            {
+                StatusCode = 400;
+                Message = "The model submitted was invalid. Please correct the specified errors and try again.";
+                ModelErrors = modelState
+                    .SelectMany(m => m.Value.Errors.Select(me => new ModelError
+                    {
+                        FieldName = m.Key,
+                        ErrorMessage = me.ErrorMessage
+                    }));
+            }
+        }
+
+        public ApiResult()
+        {
+
+        }
+
+        [JsonIgnore]
+        public int? StatusCode { get; set; }
+
+        public string Message { get; set; }
+
+        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+        public object Data { get; set; }
+
+        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+        public IEnumerable<ModelError> ModelErrors { get; set; }
+
+        public override Task ExecuteResultAsync(ActionContext context)
+        {
+            if (StatusCode.HasValue)
+            {
+                context.HttpContext.Response.StatusCode = StatusCode.Value;
+            }
+
+            var json = new JsonResult(this);
+            return json.ExecuteResultAsync(context);
+        }
+
+        public class ModelError
+        {
+            public string FieldName { get; set; }
+
+            public string ErrorMessage { get; set; }
+        }
+    }
+}