ControllerBase. Add BadRequestBuilder and extentionMethod.

AsbCloudWebApi/Extentions.cs

@@ -1,7 +1,9 @@
 using AsbCloudApp.Data;
+using System.Collections.Generic;
+using System.Linq;
 using System.Security.Claims;
 
-namespace AsbCloudWebApi
+namespace Microsoft.AspNetCore.Mvc 
 {
     public static class Extentions
     {
@@ -26,5 +28,58 @@ namespace AsbCloudWebApi
                 ? uid
                 : null;
         }
+
+        public static IActionResult MakeBadRequest(this ControllerBase controller, string paramName, params string[] errors)
+        {
+            return controller.BadRequest(new
+            {
+                name = paramName,
+                errors,
+            });
+        }
+
+        public static BadRequestBuilder BadRequestBuilder(this ControllerBase controller, string paramName, params string[] errors)
+            => new BadRequestBuilder(paramName, errors);
+    }
+
+    public class BadRequestBuilder
+    {
+        private readonly Dictionary<string, List<string>> body;
+
+        private List<string> GetOrCreateNew(string paramName)
+        {
+            List<string> par;
+            if (body.ContainsKey(paramName))
+                par = body[paramName];
+            else
+            {
+                par = new List<string>();
+                body[paramName] = par;
+            }
+            return par;
+        }
+
+        public BadRequestBuilder(string paramName, params string[] errors)
+        {
+            body = new();
+            body[paramName] = new List<string>(errors);
+        }
+
+        public BadRequestBuilder Add(string paramName, params string[] errors)
+        {
+            var par = GetOrCreateNew(paramName);
+            par.AddRange(errors);
+            return this;
+        }
+
+        public BadRequestObjectResult Build()
+        {
+            var o = body.Select(e => new { name = e.Key, errors = e.Value.ToArray() });
+
+            return new BadRequestObjectResult(o);
+        }
+
+        public static implicit operator BadRequestObjectResult(BadRequestBuilder d) => d.Build();
     }
 }
+

AsbCloudWebApi/Middlewares/PermissionsMiddlware.cs

@@ -1,6 +1,7 @@
 using AsbCloudApp.Services;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.DependencyInjection;
 using System;
 using System.Threading.Tasks;