RocketChat/Rocket.Chat

import { OAuth } from 'meteor/oauth';

import { settings } from '../../settings/client';

OAuth.launchLogin = ((func) =>
    function (options) {
        const proxy = settings.get('Accounts_OAuth_Proxy_services').replace(/\s/g, '').split(',');
        if (proxy.includes(options.loginService)) {
            const redirect_uri = options.loginUrl.match(/(&redirect_uri=)([^&]+|$)/)[2];
            options.loginUrl = options.loginUrl.replace(
                /(&redirect_uri=)([^&]+|$)/,
                `$1${encodeURIComponent(settings.get('Accounts_OAuth_Proxy_host'))}/oauth_redirect`,
            );
            options.loginUrl = options.loginUrl.replace(/(&state=)([^&]+|$)/, `$1${redirect_uri}!$2`);
            options.loginUrl = `${settings.get('Accounts_OAuth_Proxy_host')}/redirect/${encodeURIComponent(options.loginUrl)}`;
        }

        return func(options);
    })(OAuth.launchLogin.bind(OAuth));