Invision Community OAuth Support

src/Tgstation.Server.Api/Models/OAuthProvider.cs

@@ -28,5 +28,10 @@ namespace Tgstation.Server.Api.Models
 		/// https://www.keycloak.org
 		/// </summary>
 		Keycloak,
+
+		/// <summary>
+		/// https://invisioncommunity.com/
+		/// </summary>
+		InvisionCommunity,
 	}
 }

src/Tgstation.Server.Host/Security/OAuth/InvisionCommunityOAuthValidator.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Net.Http;
+
+using Microsoft.Extensions.Logging;
+
+using Tgstation.Server.Api.Models;
+using Tgstation.Server.Host.Configuration;
+using Tgstation.Server.Host.System;
+
+namespace Tgstation.Server.Host.Security.OAuth
+{
+	/// <summary>
+	/// OAuth validator for Discord.
+	/// </summary>
+	sealed class InvisionCommunityOAuthValidator : GenericOAuthValidator
+		{
+		/// <inheritdoc />
+		public override OAuthProvider Provider => OAuthProvider.InvisionCommunity;
+
+		/// <inheritdoc />
+		protected override Uri TokenUrl => new Uri($"{BaseProtocolPath}/oauth/token/");
+
+		/// <inheritdoc />
+		protected override Uri UserInformationUrl => new Uri($"{BaseProtocolPath}/api/core/me");
+
+		/// <summary>
+		/// Base path to the server's OAuth endpoint.
+		/// </summary>
+		string BaseProtocolPath => $"{OAuthConfiguration.ServerUrl}";
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="InvisionCommunityOAuthValidator"/> class.
+		/// </summary>
+		/// <param name="httpClientFactory">The <see cref="IHttpClientFactory"/> for the <see cref="GenericOAuthValidator"/>.</param>
+		/// <param name="assemblyInformationProvider">The <see cref="IAssemblyInformationProvider"/> for the <see cref="GenericOAuthValidator"/>.</param>
+		/// <param name="logger">The <see cref="ILogger"/> for the <see cref="GenericOAuthValidator"/>.</param>
+		/// <param name="oAuthConfiguration">The <see cref="OAuthConfiguration"/> for the <see cref="GenericOAuthValidator"/>.</param>
+		public InvisionCommunityOAuthValidator(
+			IHttpClientFactory httpClientFactory,
+			IAssemblyInformationProvider assemblyInformationProvider,
+			ILogger<InvisionCommunityOAuthValidator> logger,
+			OAuthConfiguration oAuthConfiguration)
+			: base(httpClientFactory, assemblyInformationProvider, logger, oAuthConfiguration) {
+		}
+
+		/// <inheritdoc />
+		protected override OAuthTokenRequest CreateTokenRequest(string code) => new OAuthTokenRequest(OAuthConfiguration, code, "profile");
+
+		/// <inheritdoc />
+		protected override string DecodeTokenPayload(dynamic responseJson) => responseJson.access_token;
+
+		/// <inheritdoc />
+		protected override string DecodeUserInformationPayload(dynamic responseJson) => responseJson.id;
+	}
+}

src/Tgstation.Server.Host/Security/OAuth/OAuthProviders.cs

@@ -79,6 +79,14 @@ namespace Tgstation.Server.Host.Security.OAuth
 						assemblyInformationProvider,
 						loggerFactory.CreateLogger<KeycloakOAuthValidator>(),
 						keyCloakConfig));
+
+			if (securityConfiguration.OAuth.TryGetValue(OAuthProvider.InvisionCommunity, out var invisionConfig))
+				validatorsBuilder.Add(
+					new InvisionCommunityOAuthValidator(
+						httpClientFactory,
+						assemblyInformationProvider,
+						loggerFactory.CreateLogger<InvisionCommunityOAuthValidator>(),
+						invisionConfig));
 		}
 
 		/// <inheritdoc />