[#1] [add] basic responses with status code generation

Author: i4004

src/Simplify.Web.Swagger/ControllerAction.cs

@@ -20,7 +20,7 @@ public class ControllerAction
 		/// <summary>
 		/// Controller responses
 		/// </summary>
-		public IList<OpenApiResponse> Responses = new List<OpenApiResponse>();
+		public IDictionary<int, OpenApiResponse> Responses = new Dictionary<int, OpenApiResponse>();
 
 		/// <summary>
 		/// Controller path

src/Simplify.Web.Swagger/ControllerActionsFactory.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
+using Microsoft.AspNetCore.Mvc;
 using Microsoft.OpenApi.Models;
 using Simplify.Web.Meta;
 
@@ -39,7 +41,8 @@ private static ControllerAction CreateControllerAction(HttpMethod method, string
 			{
 				Type = HttpMethodToOperationType(method),
 				Path = route.StartsWith("/") ? route : "/" + route,
-				Names = CreateNames(item.ControllerType)
+				Names = CreateNames(item.ControllerType),
+				Responses = CreateResponses(item.ControllerType)
 			};
 
 		private static ControllerActionNames CreateNames(Type controllerType) =>
@@ -88,5 +91,55 @@ private static OperationType HttpMethodToOperationType(HttpMethod method) =>
 				HttpMethod.Options => OperationType.Options,
 				_ => OperationType.Get
 			};
+
+		private static IDictionary<int, OpenApiResponse> CreateResponses(Type controllerType)
+		{
+			var items = new Dictionary<int, OpenApiResponse>();
+
+			var attributes = controllerType.GetCustomAttributes(typeof(ProducesResponseTypeAttribute), false);
+
+			foreach (ProducesResponseTypeAttribute item in attributes)
+				items.Add(item.StatusCode, CreateResponse(item));
+
+			return items;
+		}
+
+		private static OpenApiResponse CreateResponse(ProducesResponseTypeAttribute producesResponse)
+		{
+			var response = new OpenApiResponse();
+
+			response.Description = ResponseDescriptionMap
+				.FirstOrDefault((entry) => Regex.IsMatch(producesResponse.StatusCode.ToString(), entry.Key))
+				.Value;
+
+			return response;
+		}
+
+		private static readonly IReadOnlyCollection<KeyValuePair<string, string>> ResponseDescriptionMap = new[]
+	  {
+		   new KeyValuePair<string, string>("1\\d{2}", "Information"),
+
+			new KeyValuePair<string, string>("201", "Created"),
+			new KeyValuePair<string, string>("202", "Accepted"),
+			new KeyValuePair<string, string>("204", "No Content"),
+			new KeyValuePair<string, string>("2\\d{2}", "Success"),
+
+			new KeyValuePair<string, string>("304", "Not Modified"),
+			new KeyValuePair<string, string>("3\\d{2}", "Redirect"),
+
+			new KeyValuePair<string, string>("400", "Bad Request"),
+			new KeyValuePair<string, string>("401", "Unauthorized"),
+			new KeyValuePair<string, string>("403", "Forbidden"),
+			new KeyValuePair<string, string>("404", "Not Found"),
+			new KeyValuePair<string, string>("405", "Method Not Allowed"),
+			new KeyValuePair<string, string>("406", "Not Acceptable"),
+			new KeyValuePair<string, string>("408", "Request Timeout"),
+			new KeyValuePair<string, string>("409", "Conflict"),
+			new KeyValuePair<string, string>("429", "Too Many Requests"),
+			new KeyValuePair<string, string>("4\\d{2}", "Client Error"),
+
+			new KeyValuePair<string, string>("5\\d{2}", "Server Error"),
+			new KeyValuePair<string, string>("default", "Error")
+		};
 	}
 }

src/Simplify.Web.Swagger/SimplifyWebDocumentFilter.cs

@@ -46,6 +46,9 @@ private static OpenApiOperation CreateOperation(ControllerAction item)
 			if (item.Names.Summary != null)
 				operation.Summary = item.Names.Summary;
 
+			foreach (var response in item.Responses)
+				operation.Responses.Add(response.Key.ToString(), response.Value);
+
 			return operation;
 		}
 	}