Added CriticalError to ResultStatuses (#140)

src/Ardalis.Result.AspNetCore/ResultStatusMap.cs

@@ -35,7 +35,10 @@ public ResultStatusMap AddDefaultMap()
                 .For(ResultStatus.NotFound, HttpStatusCode.NotFound, resultStatusOptions => resultStatusOptions
                     .With(NotFoundEntity))
                 .For(ResultStatus.Conflict, HttpStatusCode.Conflict, resultStatusOptions => resultStatusOptions
-                    .With(ConflictEntity));
+                    .With(ConflictEntity))
+                .For(ResultStatus.CriticalError, HttpStatusCode.InternalServerError, resultStatusOptions =>
+                    resultStatusOptions
+                        .With(CriticalEntity));
         }
 
         /// <summary>
@@ -139,6 +142,19 @@ private static ProblemDetails ConflictEntity(ControllerBase controller, IResult
                 Detail = result.Errors.Any() ? details.ToString() : null
             };
         }
+
+        private static ProblemDetails CriticalEntity(ControllerBase controller, IResult result)
+        {
+            var details = new StringBuilder("Next error(s) occured:");
+
+            foreach (var error in result.Errors) details.Append("* ").Append(error).AppendLine();
+
+            return new ProblemDetails
+            {
+                Title = "Something went wrong.",
+                Detail = result.Errors.Any() ? details.ToString() : null
+            };
+        }
     }
 
     public class ResultStatusOptions
@@ -217,4 +233,4 @@ public ResultStatusOptions With(Type responseType, Func<ControllerBase, IResult,
             return this;
         }
     }
-}
+}

src/Ardalis.Result/Result.cs

@@ -194,5 +194,17 @@ public static Result<T> Conflict(params string[] errorMessages)
         {
             return new Result<T>(ResultStatus.Conflict) { Errors = errorMessages };
         }
+
+        /// <summary>
+        /// Represents a critical error that occurred during the execution of the service.
+        /// Everything provided by the user was valid, but the service was unable to complete due to an exception.
+        /// See also HTTP 500 Internal Server Error: https://en.wikipedia.org/wiki/List_of_HTTP_status_codes#5xx_server_errors
+        /// </summary>
+        /// <param name="errorMessages">A list of string error messages.</param>
+        /// <returns>A Result<typeparamref name="T"/></returns>
+        public static Result<T> CriticalError(params string[] errorMessages)
+        {
+            return new Result<T>(ResultStatus.CriticalError) { Errors = errorMessages };
+        }
     }
 }

src/Ardalis.Result/ResultExtensions.cs

@@ -29,6 +29,7 @@ public static Result<TDestination> Map<TSource, TDestination>(this Result<TSourc
                 case ResultStatus.Conflict: return result.Errors.Any()
                                         ? Result<TDestination>.Conflict(result.Errors.ToArray())
                                         : Result<TDestination>.Conflict();
+                case ResultStatus.CriticalError: return Result<TDestination>.CriticalError(result.Errors.ToArray());
                 default:
                     throw new NotSupportedException($"Result {result.Status} conversion is not supported.");
             }

src/Ardalis.Result/ResultStatus.cs

@@ -9,5 +9,6 @@ public enum ResultStatus
         Invalid,
         NotFound,
         Conflict,
+        CriticalError
     }
 }