Convert IdleDetector to TypeScript

js/modules/idle_detector.js

@@ -1,63 +0,0 @@
-// Copyright 2018-2020 Signal Messenger, LLC
-// SPDX-License-Identifier: AGPL-3.0-only
-
-/* eslint-env browser */
-
-const EventEmitter = require('events');
-
-const POLL_INTERVAL_MS = 5 * 1000;
-const IDLE_THRESHOLD_MS = 20;
-
-class IdleDetector extends EventEmitter {
-  constructor() {
-    super();
-    this.handle = null;
-    this.timeoutId = null;
-  }
-
-  start() {
-    window.SignalContext.log.info('Start idle detector');
-    this._scheduleNextCallback();
-  }
-
-  stop() {
-    if (!this.handle) {
-      return;
-    }
-
-    window.SignalContext.log.info('Stop idle detector');
-    this._clearScheduledCallbacks();
-  }
-
-  _clearScheduledCallbacks() {
-    if (this.handle) {
-      cancelIdleCallback(this.handle);
-      this.handle = null;
-    }
-
-    if (this.timeoutId) {
-      clearTimeout(this.timeoutId);
-      this.timeoutId = null;
-    }
-  }
-
-  _scheduleNextCallback() {
-    this._clearScheduledCallbacks();
-    this.handle = window.requestIdleCallback(deadline => {
-      const { didTimeout } = deadline;
-      const timeRemaining = deadline.timeRemaining();
-      const isIdle = timeRemaining >= IDLE_THRESHOLD_MS;
-      this.timeoutId = setTimeout(
-        () => this._scheduleNextCallback(),
-        POLL_INTERVAL_MS
-      );
-      if (isIdle || didTimeout) {
-        this.emit('idle', { timestamp: Date.now(), didTimeout, timeRemaining });
-      }
-    });
-  }
-}
-
-module.exports = {
-  IdleDetector,
-};

js/modules/signal.js

@@ -131,7 +131,6 @@ const { QualifiedAddress } = require('../../ts/types/QualifiedAddress');
 const Initialization = require('./views/initialization');
 
 // Workflow
-const { IdleDetector } = require('./idle_detector');
 const MessageDataMigrator = require('./messages_data_migrator');
 
 // Processes / Services
@@ -413,7 +412,6 @@ exports.setup = (options = {}) => {
   };
 
   const Workflow = {
-    IdleDetector,
     MessageDataMigrator,
   };