diff --git a/src/connections/EpicGames/index.ts b/src/connections/EpicGames/index.ts
new file mode 100644
index 00000000..cffafc60
--- /dev/null
+++ b/src/connections/EpicGames/index.ts
@@ -0,0 +1,135 @@
+import {
+ Config,
+ ConnectedAccount,
+ ConnectionCallbackSchema,
+ ConnectionLoader,
+ DiscordApiErrors,
+} from "@fosscord/util";
+import fetch from "node-fetch";
+import Connection from "../../util/connections/Connection";
+import { EpicGamesSettings } from "./EpicGamesSettings";
+
+interface OAuthTokenResponse {
+ access_token: string;
+ token_type: string;
+ scope: string;
+ refresh_token?: string;
+ expires_in?: number;
+}
+
+export interface UserResponse {
+ accountId: string;
+ displayName: string;
+ preferredLanguage: string;
+}
+
+export interface EpicTokenResponse extends OAuthTokenResponse {
+ expires_at: string;
+ refresh_expires_in: number;
+ refresh_expires_at: string;
+ account_id: string;
+ client_id: string;
+ application_id: string;
+}
+
+export default class EpicGamesConnection extends Connection {
+ public readonly id = "epicgames";
+ public readonly authorizeUrl = "https://www.epicgames.com/id/authorize";
+ public readonly tokenUrl = "https://api.epicgames.dev/epic/oauth/v1/token";
+ public readonly userInfoUrl =
+ "https://api.epicgames.dev/epic/id/v1/accounts";
+ public readonly scopes = ["basic profile"];
+ settings: EpicGamesSettings = new EpicGamesSettings();
+
+ init(): void {
+ this.settings = ConnectionLoader.getConnectionConfig(
+ this.id,
+ this.settings,
+ ) as EpicGamesSettings;
+ }
+
+ 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);
+ return url.toString();
+ }
+
+ getTokenUrl(): string {
+ return this.tokenUrl;
+ }
+
+ async exchangeCode(state: string, code: string): Promise<string> {
+ this.validateState(state);
+
+ const url = this.getTokenUrl();
+
+ return fetch(url.toString(), {
+ method: "POST",
+ headers: {
+ Accept: "application/json",
+ Authorization: `Basic ${Buffer.from(
+ `${this.settings.clientId}:${this.settings.clientSecret}`,
+ ).toString("base64")}`,
+ "Content-Type": "application/x-www-form-urlencoded",
+ },
+ body: new URLSearchParams({
+ grant_type: "authorization_code",
+ code,
+ }),
+ })
+ .then((res) => res.json())
+ .then((res: EpicTokenResponse) => res.access_token)
+ .catch((e) => {
+ console.error(
+ `Error exchanging token for ${this.id} connection: ${e}`,
+ );
+ throw DiscordApiErrors.INVALID_OAUTH_TOKEN;
+ });
+ }
+
+ async getUser(token: string): Promise<UserResponse[]> {
+ const { sub } = JSON.parse(
+ Buffer.from(token.split(".")[1], "base64").toString("utf8"),
+ );
+ const url = new URL(this.userInfoUrl);
+ url.searchParams.append("accountId", sub);
+ return fetch(url.toString(), {
+ method: "GET",
+ headers: {
+ Authorization: `Bearer ${token}`,
+ },
+ }).then((res) => res.json());
+ }
+
+ async handleCallback(
+ params: ConnectionCallbackSchema,
+ ): Promise<ConnectedAccount | null> {
+ const userId = this.getUserId(params.state);
+ const token = await this.exchangeCode(params.state, params.code!);
+ const userInfo = await this.getUser(token);
+
+ const exists = await this.hasConnection(userId, userInfo[0].accountId);
+
+ if (exists) return null;
+
+ return await this.createConnection({
+ user_id: userId,
+ external_id: userInfo[0].accountId,
+ friend_sync: params.friend_sync,
+ name: userInfo[0].displayName,
+ type: this.id,
+ });
+ }
+}
|
