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import {
ConnectedAccount,
ConnectedAccountCommonOAuthTokenResponse,
ConnectionCallbackSchema,
ConnectionLoader,
DiscordApiErrors,
} from "@spacebar/util";
import wretch from "wretch";
import Connection from "../../util/connections/Connection";
import { FacebookSettings } from "./FacebookSettings";
export interface FacebookErrorResponse {
error: {
message: string;
type: string;
code: number;
fbtrace_id: string;
};
}
interface UserResponse {
name: string;
id: string;
}
export default class FacebookConnection extends Connection {
public readonly id = "facebook";
public readonly authorizeUrl =
"https://www.facebook.com/v14.0/dialog/oauth";
public readonly tokenUrl =
"https://graph.facebook.com/v14.0/oauth/access_token";
public readonly userInfoUrl = "https://graph.facebook.com/v14.0/me";
public readonly scopes = ["public_profile"];
settings: FacebookSettings = new FacebookSettings();
init(): void {
this.settings = ConnectionLoader.getConnectionConfig(
this.id,
this.settings,
) as FacebookSettings;
}
getAuthorizationUrl(userId: string): string {
const state = this.createState(userId);
const url = new URL(this.authorizeUrl);
url.searchParams.append("client_id", this.settings.clientId!);
url.searchParams.append("redirect_uri", this.getRedirectUri());
url.searchParams.append("state", state);
url.searchParams.append("response_type", "code");
url.searchParams.append("scope", this.scopes.join(" "));
url.searchParams.append("display", "popup");
return url.toString();
}
getTokenUrl(code: string): string {
const url = new URL(this.tokenUrl);
url.searchParams.append("client_id", this.settings.clientId!);
url.searchParams.append("client_secret", this.settings.clientSecret!);
url.searchParams.append("code", code);
url.searchParams.append("redirect_uri", this.getRedirectUri());
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",
})
.get()
.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 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.id);
if (exists) return null;
return await this.createConnection({
user_id: userId,
external_id: userInfo.id,
friend_sync: params.friend_sync,
name: userInfo.name,
type: this.id,
});
}
}
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