add Xbox connection

2 files changed, 229 insertions, 0 deletions

diff --git a/src/connections/Xbox/XboxSettings.ts b/src/connections/Xbox/XboxSettings.ts
new file mode 100644
index 00000000..c1a41056
--- /dev/null
+++ b/src/connections/Xbox/XboxSettings.ts
@@ -0,0 +1,5 @@
+export class XboxSettings {
+	enabled: boolean = false;
+	clientId: string | null = null;
+	clientSecret: string | null = null;
+}
diff --git a/src/connections/Xbox/index.ts b/src/connections/Xbox/index.ts
new file mode 100644
index 00000000..eb0e2496
--- /dev/null
+++ b/src/connections/Xbox/index.ts
@@ -0,0 +1,224 @@
+import {
+	ApiError,
+	Config,
+	ConnectedAccount,
+	ConnectedAccountCommonOAuthTokenResponse,
+	ConnectionCallbackSchema,
+	ConnectionLoader,
+	DiscordApiErrors,
+} from "@fosscord/util";
+import fetch from "node-fetch";
+import Connection from "../../util/connections/Connection";
+import { XboxSettings } from "./XboxSettings";
+
+interface XboxUserResponse {
+	IssueInstant: string;
+	NotAfter: string;
+	Token: string;
+	DisplayClaims: {
+		xui: {
+			gtg: string;
+			xid: string;
+			uhs: string;
+			agg: string;
+			usr: string;
+			utr: string;
+			prv: string;
+		}[];
+	};
+}
+
+interface XboxErrorResponse {
+	error: string;
+	error_description: string;
+}
+
+export default class XboxConnection extends Connection {
+	public readonly id = "xbox";
+	public readonly authorizeUrl =
+		"https://login.live.com/oauth20_authorize.srf";
+	public readonly tokenUrl = "https://login.live.com/oauth20_token.srf";
+	public readonly userInfoUrl =
+		"https://xsts.auth.xboxlive.com/xsts/authorize";
+	public readonly userAuthUrl =
+		"https://user.auth.xboxlive.com/user/authenticate";
+	public readonly scopes = ["Xboxlive.signin", "Xboxlive.offline_access"];
+	settings: XboxSettings = new XboxSettings();
+
+	init(): void {
+		this.settings = ConnectionLoader.getConnectionConfig(
+			this.id,
+			this.settings,
+		) as XboxSettings;
+	}
+
+	getAuthorizationUrl(userId: string): string {
+		const state = this.createState(userId);
+		const url = new URL(this.authorizeUrl);
+
+		url.searchParams.append("client_id", this.settings.clientId!);
+		// TODO: probably shouldn't rely on cdn as this could be different from what we actually want. we should have an api endpoint setting.
+		url.searchParams.append(
+			"redirect_uri",
+			`${
+				Config.get().cdn.endpointPrivate || "http://localhost:3001"
+			}/connections/${this.id}/callback`,
+		);
+		url.searchParams.append("response_type", "code");
+		url.searchParams.append("scope", this.scopes.join(" "));
+		url.searchParams.append("state", state);
+		url.searchParams.append("approval_prompt", "auto");
+		return url.toString();
+	}
+
+	getTokenUrl(): string {
+		return this.tokenUrl;
+	}
+
+	async getUserToken(token: string): Promise<string> {
+		return fetch(this.userAuthUrl, {
+			method: "POST",
+			headers: {
+				"x-xbl-contract-version": "3",
+				"Content-Type": "application/json",
+				Accept: "application/json",
+			},
+			body: JSON.stringify({
+				RelyingParty: "http://auth.xboxlive.com",
+				TokenType: "JWT",
+				Properties: {
+					AuthMethod: "RPS",
+					SiteName: "user.auth.xboxlive.com",
+					RpsTicket: `d=${token}`,
+				},
+			}),
+		})
+			.then((res) => {
+				if (!res.ok) {
+					throw new ApiError("Failed to get user token", 0, 400);
+				}
+
+				return res.json();
+			})
+			.then((res) => res.Token)
+			.catch((e) => {
+				console.error(
+					`Error getting user token for ${this.id} connection: ${e}`,
+				);
+				throw DiscordApiErrors.INVALID_OAUTH_TOKEN;
+			});
+	}
+
+	async exchangeCode(
+		state: string,
+		code: string,
+	): Promise<ConnectedAccountCommonOAuthTokenResponse> {
+		this.validateState(state);
+
+		const url = this.getTokenUrl();
+
+		return fetch(url.toString(), {
+			method: "POST",
+			headers: {
+				Accept: "application/json",
+				"Content-Type": "application/x-www-form-urlencoded",
+				Authorization: `Basic ${Buffer.from(
+					`${this.settings.clientId!}:${this.settings.clientSecret!}`,
+				).toString("base64")}`,
+			},
+			body: new URLSearchParams({
+				grant_type: "authorization_code",
+				code: code,
+				client_id: this.settings.clientId!,
+				redirect_uri: `${
+					Config.get().cdn.endpointPrivate || "http://localhost:3001"
+				}/connections/${this.id}/callback`,
+				scope: this.scopes.join(" "),
+			}),
+		})
+			.then((res) => {
+				if (!res.ok) {
+					throw new ApiError("Failed to exchange code", 0, 400);
+				}
+
+				return res.json();
+			})
+			.then(
+				(
+					res: ConnectedAccountCommonOAuthTokenResponse &
+						XboxErrorResponse,
+				) => {
+					if (res.error) throw new Error(res.error_description);
+					return res;
+				},
+			)
+			.catch((e) => {
+				console.error(
+					`Error exchanging code for ${this.id} connection: ${e}`,
+				);
+				throw DiscordApiErrors.GENERAL_ERROR;
+			});
+	}
+
+	async getUser(token: string): Promise<XboxUserResponse> {
+		const url = new URL(this.userInfoUrl);
+		return fetch(url.toString(), {
+			method: "POST",
+			headers: {
+				"x-xbl-contract-version": "3",
+				"Content-Type": "application/json",
+				Accept: "application/json",
+			},
+			body: JSON.stringify({
+				RelyingParty: "http://xboxlive.com",
+				TokenType: "JWT",
+				Properties: {
+					UserTokens: [token],
+					SandboxId: "RETAIL",
+				},
+			}),
+		})
+			.then((res) => {
+				if (!res.ok) {
+					throw new ApiError("Failed to fetch user", 0, 400);
+				}
+
+				return res.json();
+			})
+			.then((res: XboxUserResponse & XboxErrorResponse) => {
+				if (res.error) throw new Error(res.error_description);
+				return res;
+			})
+			.catch((e) => {
+				console.error(
+					`Error fetching user for ${this.id} connection: ${e}`,
+				);
+				throw DiscordApiErrors.GENERAL_ERROR;
+			});
+	}
+
+	async handleCallback(
+		params: ConnectionCallbackSchema,
+	): Promise<ConnectedAccount | null> {
+		const userId = this.getUserId(params.state);
+		const tokenData = await this.exchangeCode(params.state, params.code!);
+		const userToken = await this.getUserToken(tokenData.access_token);
+		const userInfo = await this.getUser(userToken);
+
+		const exists = await this.hasConnection(
+			userId,
+			userInfo.DisplayClaims.xui[0].xid,
+		);
+
+		if (exists) return null;
+
+		return await this.createConnection({
+			token_data: { ...tokenData, fetched_at: Date.now() },
+			user_id: userId,
+			external_id: userInfo.DisplayClaims.xui[0].xid,
+			friend_sync: params.friend_sync,
+			name: userInfo.DisplayClaims.xui[0].gtg,
+			type: this.id,
+		});
+	}
+}