bluetooth: Add DeviceChanged logging in Device service.

chrome/browser/resources/bluetooth_internals/bluetooth_internals.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * Javascript for bluetooth_internals.html, served from
  *     chrome://bluetooth-internals/.
  */
 
-/**
- * The implementation of AdapterClient in
- *     device/bluetooth/public/interfaces/adapter.mojom.
- */
-var AdapterClient = function() {};
-AdapterClient.prototype = {
-  /**
-   * Prints added device to console.
-   * @param {!bluetoothDevice.DeviceInfo} device
-   */
-  deviceAdded: function(device) { console.log('Device added', device); },
-
-  /**
-   * Prints removed device to console.
-   * @param {!bluetoothDevice.DeviceInfo} device
-   */
-  deviceRemoved: function(device) { console.log('Device removed', device); }
-};
-
 (function() {
   var adapter, adapterClient, bluetoothAdapter, bluetoothDevice, connection;
 
+  // Dictionary for address->client mapping

[scheib, 2016/10/14 07:14:51]

Close with .

[mbrunson, 2016/10/14 18:25:25]

Done.

+  var gattClients = {};
+
+  // Dictionary for address->device mapping
+  var devices = {};
+
+  /**
+  * The implementation of AdapterClient in
+  *     device/bluetooth/public/interfaces/adapter.mojom.
+  */
+  var AdapterClient = function() {};
+  AdapterClient.prototype = {
+    /**
+    * Prints added device to console.
+    * @param {!bluetoothDevice.DeviceInfo} device
+    */
+    deviceAdded: function(device) {
+      console.log('Device added', device);
+      setDeviceClient(device);
+    },
+
+    /**
+    * Prints removed device to console.
+    * @param {!bluetoothDevice.DeviceInfo} device
+    */
+    deviceRemoved: function(device) {
+      console.log('Device removed', device);
+      delete gattClients[device.address];
+      delete devices[device.address];
+    }
+  };
+
+  /**
+  * The implementation of GattClient in
+  *     device/bluetooth/public/interfaces/device.mojom.
+  */
+  var GattClient = function() {};
+  GattClient.prototype = {
+    /**
+    * Prints received advertising packet to console.
+    * @param {!bluetoothDevice.AdvertisingPacket} advertisingPacket the
+    *     advertising packet received from the device.
+    */
+    deviceChanged: function(advertisingPacket) {
+      console.log(new Date(advertisingPacket.timestamp), advertisingPacket);
+    }
+  };
+
   /**
    * TODO(crbug.com/652361): Move to shared location.
    * Helper to convert callback-based define() API to a promise-based API.
    * @param {!Array<string>} moduleNames
    * @return {!Promise}
    */
   function importModules(moduleNames) {
     return new Promise(function(resolve, reject) {
       define(moduleNames, function(var_args) {
         resolve(Array.prototype.slice.call(arguments, 0));
@@ skipping 15 matching lines @@
     ]).then(function([frameInterfaces, ...modules]) {
       console.log('Loaded modules');
 
       // Destructure here to assign global variables.
       [bluetoothAdapter, bluetoothDevice, connection] = modules;
 
       // Hook up the instance properties.
       AdapterClient.prototype.__proto__ =
           bluetoothAdapter.AdapterClient.stubClass.prototype;
 
+      GattClient.prototype.__proto__ =
+          bluetoothDevice.GattClient.stubClass.prototype;
+
       var adapterFactory = connection.bindHandleToProxy(
           frameInterfaces.getInterface(bluetoothAdapter.AdapterFactory.name),
           bluetoothAdapter.AdapterFactory);
 
       // Get an Adapter service.
       return adapterFactory.getAdapter();
     }).then(function(response) {
       if (!response.adapter) {
         throw new Error('Bluetooth Not Supported on this platform.');
       }
 
       adapter = connection.bindHandleToProxy(response.adapter,
                                              bluetoothAdapter.Adapter);
 
       // Create a message pipe and bind one end to client
       // implementation and the other to the Adapter service.
       adapterClient = new AdapterClient();
       adapter.setClient(connection.bindStubDerivedImpl(adapterClient));
     });
   }
 
   /**
-   * Prints device info from the device service.
+   * Logs the latest info from the device. Creates a message pipe to the device
+   *     if none exists and caches it.
    * @param {!bluetoothDevice.DeviceInfo} deviceInfo the device for which to
    *     get the information.
    * @return {!Promise} resolves if device service is retrieved, rejects
    *     otherwise.
    */
   function logDevice(deviceInfo) {
+    return getDevice(deviceInfo).then(function(device) {
+      return device.getInfo();
+    }).then(function(response) {
+      console.log(response.info.name_for_display, response.info);
+    });
+  }
+
+  /**
+   * Creates a logging client to the device with the given |deviceInfo|.
+   * @param {!bluetoothDevice.DeviceInfo} deviceInfo the device for which to
+   *     get the information.
+   * @return {!Promise} resolves if device service is retrieved, rejects
+   *     otherwise.
+   */
+  function setDeviceClient(deviceInfo) {
+    return getDevice(deviceInfo).then(function(device) {
+      var gattClient = new GattClient();
+      device.setClient(connection.bindStubDerivedImpl(gattClient));
+      gattClients[deviceInfo.address] = gattClient;
+      return Promise.resolve();
+    });
+  }
+
+  /**
+   * Gets a message pipe for the device. If none exists, a message pipe is
+   *     created and cached.
+   * @param {!bluetoothDevice.DeviceInfo} deviceInfo the device for which to
+   *     get the information.
+   * @return {!Promise<bluetoothDevice.Device>} resolves with Device if
+   *     message pipe was created successfully, reject otherwise.
+   */
+  function getDevice(deviceInfo) {
+     if (devices[deviceInfo.address]) {
+       return Promise.resolve(devices[deviceInfo.address]);
+     }
+
     return adapter.getDevice(deviceInfo.address).then(function(response) {
-        var deviceHandle = response.device;
-        if (!deviceHandle) {
-          throw new Error(deviceInfo.name_for_display + ' cannot be found.');
-        }
+      var deviceHandle = response.device;
+      if (!deviceHandle) {
+        throw new Error(deviceInfo.name_for_display + ' cannot be found.');
+      }
 
-        var device = connection.bindHandleToProxy(
+      var device = connection.bindHandleToProxy(
               deviceHandle, bluetoothDevice.Device);
-        return device.getInfo();
-      }).then(function(response) {
-        console.log(deviceInfo.name_for_display, response.info);
-      });
+
+      devices[deviceInfo.address] = device;
+      return device;
+    });
   }
 
   document.addEventListener('DOMContentLoaded', function() {
     initializeProxies()
       .then(function() { return adapter.getInfo(); })
       .then(function(response) { console.log('adapter', response.info); })
       .then(function() { return adapter.getDevices(); })
       .then(function(response) {
-        var devices = response.devices;
-        console.log('devices', devices.length);
+        var deviceInfos = response.devices;
+        console.log('devices', deviceInfos.length);
 
-        return Promise.all(devices.map(logDevice));
+        return Promise.all([...deviceInfos.map(logDevice),
+            ...deviceInfos.map(setDeviceClient)]);
       })
       .catch(function(error) { console.error(error); });
   });
 })();