[WebApiUtils] Exception handling; BMRHandler

WebApiUtils/BusinessManager/BMRHandler.cs

@@ -0,0 +1,68 @@
+using System.Net;
+using System.Net.Http;
+using System.Web.Http;
+using iiie.Logs.DBO;
+
+namespace iiie.WebApiUtils.BusinessManager
+{
+    /// <summary>
+    /// Handle business manager results
+    /// </summary>
+    /// <typeparam name="T">Data type</typeparam>
+    public class BMRHandler<T>
+    {
+        /// <summary>
+        /// Converts ResultStatus codes to HttpStatusCodes codes
+        /// </summary>
+        /// <param name="status">The status code</param>
+        /// <returns>The http code</returns>
+        public static HttpStatusCode ResultStatusToHttp(ResultStatus status)
+        {
+            if (status == ResultStatus.LoginError)
+                return HttpStatusCode.Unauthorized;
+            if (status == ResultStatus.PermissionError)
+                return HttpStatusCode.Forbidden;
+            if (status == ResultStatus.InputError)
+                return HttpStatusCode.BadRequest;
+            if (status == ResultStatus.NotFound)
+                return HttpStatusCode.NotFound;
+            return HttpStatusCode.InternalServerError;
+        }
+
+        /// <summary>
+        /// Returns a string corresponding to the error
+        /// </summary>
+        /// <param name="result">The result of the operation</param>
+        /// <returns>The error string</returns>
+        public static string OpResultToString(OpResult<T> result)
+        {
+            if (result)
+                return result.PublicDetails;
+
+            if (result.Status == ResultStatus.LoginError)
+                return "Bad username/password";
+            if (result.Status == ResultStatus.PermissionError)
+                return "You don\'t have the permission to do this action";
+            if (result.Status == ResultStatus.InputError)
+                return "Invalid data was provided";
+            if (result.Status == ResultStatus.NotFound)
+                return "Ressource not found";
+
+            return "Internal error";
+        }
+
+        /// <summary>
+        /// Handle business manager results
+        /// </summary>
+        /// <param name="result">The result to handle</param>
+        /// <param name="request">The request to handle</param>
+        /// <returns>The data to return to the user</returns>
+        public static T Handle(OpResult<T> result, HttpRequestMessage request)
+        {
+            if (result.Status == ResultStatus.Success)
+                return result.Data;
+            var msg = request.CreateErrorResponse(ResultStatusToHttp(result.Status), OpResultToString(result));
+            throw new HttpResponseException(msg);
+        }
+    }
+}

WebApiUtils/BusinessManager/ExceptionLoggerAttribute.cs

@@ -1,6 +1,8 @@
 using System;
+using System.Net.Http;
 using System.Web.Http.Filters;
 using iiie.Logs.DataAccess;
+using iiie.Logs.DBO;
 
 namespace iiie.WebApiUtils.BusinessManager
 {
@@ -9,7 +11,8 @@ namespace iiie.WebApiUtils.BusinessManager
     {
         public override void OnException(HttpActionExecutedContext context)
         {
-            Logger.Log(context.Exception);
+            var result = Logger.Error<int>(ResultStatus.InternalError, context.Exception);
+            context.Response = context.Request.CreateErrorResponse(BMRHandler<int>.ResultStatusToHttp(result.Status), BMRHandler<int>.OpResultToString(result));
         }
     }
 }

WebApiUtils/WebApiUtils.csproj

@@ -76,6 +76,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="BusinessManager\BMRHandler.cs" />
     <Compile Include="BusinessManager\CheckModelForNullAttribute.cs" />
     <Compile Include="BusinessManager\ExceptionLoggerAttribute.cs" />
     <Compile Include="BusinessManager\ValidateModelStateAttribute.cs" />