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import {
Config,
ConnectedAccount,
ConnectedAccountCommonOAuthTokenResponse,
ConnectionCallbackSchema,
ConnectionLoader,
DiscordApiErrors,
} from "@fosscord/util";
import wretch from "wretch";
import RefreshableConnection from "../../util/connections/RefreshableConnection";
import { TwitchSettings } from "./TwitchSettings";
interface TwitchConnectionUserResponse {
data: {
id: string;
login: string;
display_name: string;
type: string;
broadcaster_type: string;
description: string;
profile_image_url: string;
offline_image_url: string;
view_count: number;
created_at: string;
}[];
}
export default class TwitchConnection extends RefreshableConnection {
public readonly id = "twitch";
public readonly authorizeUrl = "https://id.twitch.tv/oauth2/authorize";
public readonly tokenUrl = "https://id.twitch.tv/oauth2/token";
public readonly userInfoUrl = "https://api.twitch.tv/helix/users";
public readonly scopes = [
"channel_subscriptions",
"channel_check_subscription",
"channel:read:subscriptions",
];
settings: TwitchSettings = new TwitchSettings();
init(): void {
this.settings = ConnectionLoader.getConnectionConfig(
this.id,
this.settings,
) as TwitchSettings;
}
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<ConnectedAccountCommonOAuthTokenResponse> {
this.validateState(state);
const url = this.getTokenUrl();
return wretch(url.toString())
.headers({
Accept: "application/json",
"Content-Type": "application/x-www-form-urlencoded",
})
.body(
new URLSearchParams({
grant_type: "authorization_code",
code: code,
client_id: this.settings.clientId!,
client_secret: this.settings.clientSecret!,
redirect_uri: `${
Config.get().cdn.endpointPrivate ||
"http://localhost:3001"
}/connections/${this.id}/callback`,
}),
)
.post()
.json<ConnectedAccountCommonOAuthTokenResponse>()
.catch((e) => {
console.error(e);
throw DiscordApiErrors.GENERAL_ERROR;
});
}
async refreshToken(
connectedAccount: ConnectedAccount,
): Promise<ConnectedAccountCommonOAuthTokenResponse> {
if (!connectedAccount.token_data?.refresh_token)
throw new Error("No refresh token available.");
const refresh_token = connectedAccount.token_data.refresh_token;
const url = this.getTokenUrl();
return wretch(url.toString())
.headers({
Accept: "application/json",
"Content-Type": "application/x-www-form-urlencoded",
})
.body(
new URLSearchParams({
grant_type: "refresh_token",
client_id: this.settings.clientId!,
client_secret: this.settings.clientSecret!,
refresh_token: refresh_token,
}),
)
.post()
.unauthorized(async () => {
// assume the token was revoked
await connectedAccount.revoke();
return DiscordApiErrors.CONNECTION_REVOKED;
})
.json<ConnectedAccountCommonOAuthTokenResponse>()
.catch((e) => {
console.error(e);
throw DiscordApiErrors.GENERAL_ERROR;
});
}
async getUser(token: string): Promise<TwitchConnectionUserResponse> {
const url = new URL(this.userInfoUrl);
return wretch(url.toString())
.headers({
Authorization: `Bearer ${token}`,
"Client-Id": this.settings.clientId!,
})
.get()
.json<TwitchConnectionUserResponse>()
.catch((e) => {
console.error(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 userInfo = await this.getUser(tokenData.access_token);
const exists = await this.hasConnection(userId, userInfo.data[0].id);
if (exists) return null;
return await this.createConnection({
token_data: { ...tokenData, fetched_at: Date.now() },
user_id: userId,
external_id: userInfo.data[0].id,
friend_sync: params.friend_sync,
name: userInfo.data[0].display_name,
type: this.id,
});
}
}
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