Reinstate missing login mapper

src/Readarr.Http/Frontend/Mappers/LoginHtmlMapper.cs

@@ -0,0 +1,33 @@
+using System;
+using System.IO;
+using NLog;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.Configuration;
+
+namespace Readarr.Http.Frontend.Mappers
+{
+    public class LoginHtmlMapper : HtmlMapperBase
+    {
+        public LoginHtmlMapper(IAppFolderInfo appFolderInfo,
+                               IDiskProvider diskProvider,
+                               Lazy<ICacheBreakerProvider> cacheBreakProviderFactory,
+                               IConfigFileProvider configFileProvider,
+                               Logger logger)
+            : base(diskProvider, cacheBreakProviderFactory, logger)
+        {
+            HtmlPath = Path.Combine(appFolderInfo.StartUpFolder, configFileProvider.UiFolder, "login.html");
+            UrlBase = configFileProvider.UrlBase;
+        }
+
+        public override string Map(string resourceUrl)
+        {
+            return HtmlPath;
+        }
+
+        public override bool CanHandle(string resourceUrl)
+        {
+            return resourceUrl.StartsWith("/login");
+        }
+    }
+}