signal-desktop/permissions_popup_preload.js

const { ipcRenderer } = require('electron');
const url = require('url');
const i18n = require('./js/modules/i18n');

const config = url.parse(window.location.toString(), true).query;
const { locale } = config;
const localeMessages = ipcRenderer.sendSync('locale-data');

window.i18n = i18n.setup(locale, localeMessages);

require('./js/logging');

window.closePermissionsPopup = () =>
  ipcRenderer.send('close-permissions-popup');

window.getMediaPermissions = makeGetter('media-permissions');
window.setMediaPermissions = makeSetter('media-permissions');

function makeGetter(name) {
  return () =>
    new Promise((resolve, reject) => {
      ipcRenderer.once(`get-success-${name}`, (event, error, value) => {
        if (error) {
          return reject(error);
        }

        return resolve(value);
      });
      ipcRenderer.send(`get-${name}`);
    });
}

function makeSetter(name) {
  return value =>
    new Promise((resolve, reject) => {
      ipcRenderer.once(`set-success-${name}`, (event, error) => {
        if (error) {
          return reject(error);
        }

        return resolve();
      });
      ipcRenderer.send(`set-${name}`, value);
    });
}