content/test/data/background_sync/service_worker.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // The "onsync" event currently understands commands (passed as
   6 // registration tags) coming from the test. Any other tag is
   7 // passed through to the document unchanged.
   8 //
   9 // "delay" - Delays finishing the sync event with event.waitUntil.
  10 //           Send a postMessage of "completeDelayedOneShot" to finish the
  11 //           event.
  12
  13 'use strict';
  14
  15 var resolveCallback = null;
  16 var rejectCallback = null;
  17
  18 this.onmessage = function(event) {
  19   if (event.data === 'completeDelayedOneShot') {
  20     if (resolveCallback === null) {
  21       sendMessageToClients('sync', 'error - resolveCallback is null');
  22       return;
  23     }
  24
  25     resolveCallback();
  26     sendMessageToClients('sync', 'ok - delay completed');
  27     return;
  28   }
  29
  30   if (event.data === 'rejectDelayedOneShot') {
  31     if (rejectCallback === null) {
  32       sendMessageToClients('sync', 'error - rejectCallback is null');
  33       return;
  34     }
  35
  36     rejectCallback();
  37     sendMessageToClients('sync', 'ok - delay rejected');
  38   }
  39 }
  40
  41 this.onsync = function(event) {
  42   if (event.registration === undefined) {
  43     sendMessageToClients('sync', 'error - event missing registration');
  44     return;
  45   }
  46
  47   if (event.registration.tag === undefined) {
  48     sendMessageToClients('sync', 'error - registration missing tag');
  49     return;
  50   }
  51
  52   var tag = event.registration.tag;
  53
  54   if (tag === 'delay') {
  55     var syncPromise = new Promise(function(resolve, reject) {
  56       resolveCallback = resolve;
  57       rejectCallback = reject;
  58     });
  59     event.waitUntil(syncPromise);
  60     return;
  61   }
  62
  63   sendMessageToClients('sync', tag + ' fired');
  64 };
  65
  66 function sendMessageToClients(type, data) {
  67   clients.matchAll().then(function(clients) {
  68     clients.forEach(function(client) {
  69       client.postMessage({type, data});
  70     });
  71   }, function(error) {
  72     console.log(error);
  73   });
  74 }