Generalize HTTP exceptions

DiscordChatExporter/DiscordChatExporter.csproj

@@ -84,7 +84,7 @@
     <Reference Include="PresentationFramework" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Exceptions\UnathorizedException.cs" />
+    <Compile Include="Exceptions\HttpErrorStatusCodeException.cs" />
     <Compile Include="Messages\ShowErrorMessage.cs" />
     <Compile Include="Messages\ShowExportDoneMessage.cs" />
     <Compile Include="Messages\ShowSettingsMessage.cs" />

DiscordChatExporter/Exceptions/HttpErrorStatusCodeException.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Net;
+
+namespace DiscordChatExporter.Exceptions
+{
+    public class HttpErrorStatusCodeException : Exception
+    {
+        public HttpStatusCode StatusCode { get; }
+
+        public HttpErrorStatusCodeException(HttpStatusCode statusCode)
+        {
+            StatusCode = statusCode;
+        }
+    }
+}

DiscordChatExporter/Exceptions/UnathorizedException.cs

@@ -1,8 +0,0 @@
-using System;
-
-namespace DiscordChatExporter.Exceptions
-{
-    public class UnathorizedException : Exception
-    {
-    }
-}

DiscordChatExporter/Services/DataService.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Net;
 using System.Net.Http;
 using System.Threading.Tasks;
 using DiscordChatExporter.Exceptions;
@@ -21,9 +20,9 @@ namespace DiscordChatExporter.Services
             using (var response = await _httpClient.GetAsync(url))
             {
                 // Check status code
-                if (response.StatusCode.IsEither(HttpStatusCode.Unauthorized, HttpStatusCode.Forbidden))
-                    throw new UnathorizedException();
-                response.EnsureSuccessStatusCode();
+                // We throw our own exception here because default one doesn't have status code
+                if (!response.IsSuccessStatusCode)
+                    throw new HttpErrorStatusCodeException(response.StatusCode);
 
                 // Get content
                 return await response.Content.ReadAsStringAsync();

DiscordChatExporter/ViewModels/MainViewModel.cs

@@ -2,6 +2,7 @@
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
+using System.Net;
 using DiscordChatExporter.Exceptions;
 using DiscordChatExporter.Messages;
 using DiscordChatExporter.Models;
@@ -131,9 +132,10 @@ namespace DiscordChatExporter.ViewModels
                     }
                 }
             }
-            catch (UnathorizedException)
+            catch (HttpErrorStatusCodeException ex) when (ex.StatusCode == HttpStatusCode.Unauthorized)
             {
-                MessengerInstance.Send(new ShowErrorMessage("Failed to authorize. Make sure the token is valid."));
+                const string message = "Could not authorize using the given token. Make sure it's valid.";
+                MessengerInstance.Send(new ShowErrorMessage(message));
             }
 
             AvailableGuilds = _guildChannelsMap.Keys.ToArray();
@@ -181,9 +183,10 @@ namespace DiscordChatExporter.ViewModels
                 // Show dialog
                 MessengerInstance.Send(new ShowExportDoneMessage(sfd.FileName));
             }
-            catch (UnathorizedException)
+            catch (HttpErrorStatusCodeException ex) when (ex.StatusCode == HttpStatusCode.Forbidden)
             {
-                MessengerInstance.Send(new ShowErrorMessage("Failed to export. You don't have access to that channel."));
+                const string message = "You don't have access to the messages in that channel.";
+                MessengerInstance.Send(new ShowErrorMessage(message));
             }
 
             IsBusy = false;