110 lines
3.2 KiB
TypeScript
110 lines
3.2 KiB
TypeScript
import fetch from "node-fetch";
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import { Config, ConnectionCallbackSchema, DiscordApiErrors } from "../../util";
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import Connection from "../../util/connections/Connection";
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import { ConnectionLoader } from "../../util/connections/ConnectionLoader";
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import { GitHubSettings } from "./GitHubSettings";
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interface OAuthTokenResponse {
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access_token: string;
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token_type: string;
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scope: string;
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refresh_token?: string;
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expires_in?: number;
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}
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interface UserResponse {
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login: string;
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id: number;
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name: string;
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}
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export default class GitHubConnection extends Connection {
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public readonly id = "github";
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public readonly authorizeUrl = "https://github.com/login/oauth/authorize";
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public readonly tokenUrl = "https://github.com/login/oauth/access_token";
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public readonly userInfoUrl = "https://api.github.com/user";
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public readonly scopes = ["read:user"];
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settings: GitHubSettings = new GitHubSettings();
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init(): void {
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this.settings = ConnectionLoader.getConnectionConfig(
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this.id,
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this.settings,
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) as GitHubSettings;
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}
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getAuthorizationUrl(userId: string): string {
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const state = this.createState(userId);
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const url = new URL(this.authorizeUrl);
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url.searchParams.append("client_id", this.settings.clientId!);
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// TODO: probably shouldn't rely on cdn as this could be different from what we actually want. we should have an api endpoint setting.
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url.searchParams.append(
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"redirect_uri",
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`${
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Config.get().cdn.endpointPrivate || "http://localhost:3001"
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}/connections/${this.id}/callback`,
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);
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url.searchParams.append("scope", this.scopes.join(" "));
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url.searchParams.append("state", state);
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return url.toString();
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}
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getTokenUrl(code: string): string {
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const url = new URL(this.tokenUrl);
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url.searchParams.append("client_id", this.settings.clientId!);
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url.searchParams.append("client_secret", this.settings.clientSecret!);
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url.searchParams.append("code", code);
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return url.toString();
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}
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async exchangeCode(state: string, code: string): Promise<string> {
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this.validateState(state);
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const url = this.getTokenUrl(code);
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return fetch(url.toString(), {
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method: "POST",
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headers: {
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Accept: "application/json",
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},
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})
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.then((res) => res.json())
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.then((res: OAuthTokenResponse) => res.access_token)
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.catch((e) => {
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console.error(
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`Error exchanging token for ${this.id} connection: ${e}`,
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);
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throw DiscordApiErrors.INVALID_OAUTH_TOKEN;
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});
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}
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async getUser(token: string): Promise<UserResponse> {
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const url = new URL(this.userInfoUrl);
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return fetch(url.toString(), {
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method: "GET",
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headers: {
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Authorization: `Bearer ${token}`,
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},
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}).then((res) => res.json());
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}
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async handleCallback(params: ConnectionCallbackSchema): Promise<boolean> {
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const userId = this.getUserId(params.state);
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const token = await this.exchangeCode(params.state, params.code!);
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const userInfo = await this.getUser(token);
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const exists = await this.hasConnection(userId, userInfo.id.toString());
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if (exists) return false;
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await this.createConnection({
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user_id: userId,
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external_id: userInfo.id.toString(),
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friend_sync: params.friend_sync,
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name: userInfo.name,
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type: this.id,
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});
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return true;
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}
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}
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