notesnook/apps/mobile/app/services/background-sync.ts

/*
This file is part of the Notesnook project (https://notesnook.com/)

Copyright (C) 2023 Streetwriters (Private) Limited

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
import { Platform } from "react-native";
import {
  beginBackgroundTask,
  endBackgroundTask
} from "react-native-begin-background-task";

async function doInBackground(callback: () => Promise<void>) {
  if (Platform.OS === "ios") {
    try {
      const bgTaskId = await beginBackgroundTask();
      const result = await callback();
      await endBackgroundTask(bgTaskId);
      return result;
    } catch (e) {
      return (e as Error).message;
    }
  } else {
    // eslint-disable-next-line no-async-promise-executor
    return new Promise(async (resolve) => {
      try {
        const result = await callback();
        resolve(result);
      } catch (e) {
        resolve((e as Error).message);
      }
    });
  }
}

// import BackgroundFetch from "react-native-background-fetch";
// import { DatabaseLogger, db } from "../common/database";
// import { AppState, AppRegistry } from "react-native";
// import Notifications from "./notifications";
// import SettingsService from "./settings";

// let backgroundFetchStarted = false;
// async function start() {
//   if (backgroundFetchStarted) return;
//   backgroundFetchStarted = true;
//   // BackgroundFetch event handler.
//   const onEvent = async (taskId: string) => {
//     console.log("[BackgroundFetch] task: ", taskId, AppState.currentState);
//     // Do your background work...
//     await onBackgroundSyncStarted();
//     // IMPORTANT:  You must signal to the OS that your task is complete.
//     BackgroundFetch.finish(taskId);
//   };

//   // Timeout callback is executed when your Task has exceeded its allowed running-time.
//   // You must stop what you're doing immediately BackgroundFetch.finish(taskId)
//   const onTimeout = async (taskId: string) => {
//     console.warn("[BackgroundFetch] TIMEOUT: ", taskId);
//     BackgroundFetch.finish(taskId);
//   };

//   // Initialize BackgroundFetch only once when component mounts.
//   const status = await BackgroundFetch.configure(
//     {
//       minimumFetchInterval: 15,
//       enableHeadless: true,
//       startOnBoot: true,
//       stopOnTerminate: false,
//       requiredNetworkType: BackgroundFetch.NETWORK_TYPE_ANY
//     },
//     onEvent,
//     onTimeout
//   );
//   DatabaseLogger.info(`[BackgroundFetch] configure status: ${status}`);
//   console.log(`[BackgroundFetch] configure status: ${status}`);
// }

// const task = async (event: { taskId: string; timeout: boolean }) => {
//   // Get task id from event {}:
//   const taskId = event.taskId;
//   const isTimeout = event.timeout; // <-- true when your background-time has expired.
//   if (isTimeout) {
//     console.log("[BackgroundFetch] Headless TIMEOUT:", taskId);
//     BackgroundFetch.finish(taskId);
//     return;
//   }
//   DatabaseLogger.info(
//     "[BackgroundFetch HeadlessTask] start: " + taskId + AppState.currentState
//   );
//   await onBackgroundSyncStarted();
//   BackgroundFetch.finish(taskId);
// };

// BackgroundFetch.registerHeadlessTask(task);

// async function onBackgroundSyncStarted() {
//   try {
//     DatabaseLogger.info("Background Sync" + "start");
//     await db.init();
//     const user = await db.user?.getUser();
//     if (user) {
//       await db.sync(true, false);
//     }
//     await Notifications.setupReminders();
//     DatabaseLogger.info("Background Sync" + "end");
//   } catch (e) {
//     DatabaseLogger.error(e as Error);
//     console.log("Background Sync Error", (e as Error).message);
//   }
// }

// const onBoot = async () => {
//   try {
//     DatabaseLogger.info("BOOT TASK STARTED");
//     await db.init();
//     await Notifications.setupReminders();
//     SettingsService.init();
//     if (SettingsService.get().notifNotes) {
//       Notifications.pinQuickNote(false);
//     }
//     DatabaseLogger.info("BOOT TASK COMPLETE");
//   } catch (e) {
//     console.log(e);
//   }
// };

// const registerHeadlessTask = () =>
//   AppRegistry.registerHeadlessTask(
//     "com.streetwriters.notesnook.BOOT_TASK",
//     () => {
//       return onBoot;
//     }
//   );

// export const BackgroundSync = {
//   start,
//   registerHeadlessTask
// };
export default { doInBackground };