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/*
Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
Copyright (C) 2023 Spacebar and Spacebar Contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import {
ConnectedAccount,
ConnectedAccountCommonOAuthTokenResponse,
Connection,
ConnectionCallbackSchema,
ConnectionLoader,
DiscordApiErrors,
} from "@spacebar/util";
import wretch from "wretch";
import { GitHubSettings } from "./GitHubSettings";
interface UserResponse {
login: string;
id: number;
name: string;
}
export default class GitHubConnection extends Connection {
public readonly id = "github";
public readonly authorizeUrl = "https://github.com/login/oauth/authorize";
public readonly tokenUrl = "https://github.com/login/oauth/access_token";
public readonly userInfoUrl = "https://api.github.com/user";
public readonly scopes = ["read:user"];
settings: GitHubSettings = new GitHubSettings();
init(): void {
const settings = ConnectionLoader.getConnectionConfig<GitHubSettings>(this.id, this.settings);
if (settings.enabled && (!settings.clientId || !settings.clientSecret))
throw new Error(`Invalid settings for connection ${this.id}`);
}
getAuthorizationUrl(userId: string): string {
const state = this.createState(userId);
const url = new URL(this.authorizeUrl);
url.searchParams.append("client_id", this.settings.clientId as string);
url.searchParams.append("redirect_uri", this.getRedirectUri());
url.searchParams.append("scope", this.scopes.join(" "));
url.searchParams.append("state", state);
return url.toString();
}
getTokenUrl(code: string): string {
const url = new URL(this.tokenUrl);
url.searchParams.append("client_id", this.settings.clientId as string);
url.searchParams.append("client_secret", this.settings.clientSecret as string);
url.searchParams.append("code", code);
return url.toString();
}
async exchangeCode(state: string, code: string): Promise<ConnectedAccountCommonOAuthTokenResponse> {
this.validateState(state);
const url = this.getTokenUrl(code);
return wretch(url.toString())
.headers({
Accept: "application/json",
})
.post()
.json<ConnectedAccountCommonOAuthTokenResponse>()
.catch((e) => {
console.error(e);
throw DiscordApiErrors.GENERAL_ERROR;
});
}
async getUser(token: string): Promise<UserResponse> {
const url = new URL(this.userInfoUrl);
return wretch(url.toString())
.headers({
Authorization: `Bearer ${token}`,
})
.get()
.json<UserResponse>()
.catch((e) => {
console.error(e);
throw DiscordApiErrors.GENERAL_ERROR;
});
}
async handleCallback(params: ConnectionCallbackSchema): Promise<ConnectedAccount | null> {
const { state, code } = params;
if (!code) throw new Error("No code provided");
const userId = this.getUserId(state);
const tokenData = await this.exchangeCode(state, code);
const userInfo = await this.getUser(tokenData.access_token);
const exists = await this.hasConnection(userId, userInfo.id.toString());
if (exists) return null;
return await this.createConnection({
user_id: userId,
external_id: userInfo.id.toString(),
friend_sync: params.friend_sync,
name: userInfo.login,
type: this.id,
});
}
}
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