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      1 // Copyright 2014 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 #ifndef ASH_SYSTEM_CHROMEOS_BLUETOOTH_BLUETOOTH_NOTIFICATION_CONTROLLER_H_
      6 #define ASH_SYSTEM_CHROMEOS_BLUETOOTH_BLUETOOTH_NOTIFICATION_CONTROLLER_H_
      7 
      8 #include <set>
      9 
     10 #include "ash/ash_export.h"
     11 #include "base/basictypes.h"
     12 #include "base/compiler_specific.h"
     13 #include "base/memory/ref_counted.h"
     14 #include "base/memory/weak_ptr.h"
     15 #include "base/strings/string16.h"
     16 #include "device/bluetooth/bluetooth_adapter.h"
     17 #include "device/bluetooth/bluetooth_device.h"
     18 
     19 namespace ash {
     20 
     21 // The BluetoothNotificationController receives incoming pairing requests from
     22 // the BluetoothAdapter, and notifications of changes to the adapter state and
     23 // set of paired devices. It presents incoming pairing requests in the form of
     24 // rich notifications that the user can interact with to approve the request.
     25 class ASH_EXPORT BluetoothNotificationController
     26     : public device::BluetoothAdapter::Observer,
     27       public device::BluetoothDevice::PairingDelegate {
     28  public:
     29   BluetoothNotificationController();
     30   virtual ~BluetoothNotificationController();
     31 
     32   // device::BluetoothAdapter::Observer override.
     33   virtual void AdapterDiscoverableChanged(device::BluetoothAdapter* adapter,
     34                                           bool discoverable) OVERRIDE;
     35   virtual void DeviceAdded(device::BluetoothAdapter* adapter,
     36                            device::BluetoothDevice* device) OVERRIDE;
     37   virtual void DeviceChanged(device::BluetoothAdapter* adapter,
     38                              device::BluetoothDevice* device) OVERRIDE;
     39   virtual void DeviceRemoved(device::BluetoothAdapter* adapter,
     40                              device::BluetoothDevice* device) OVERRIDE;
     41 
     42   // device::BluetoothDevice::PairingDelegate override.
     43   virtual void RequestPinCode(device::BluetoothDevice* device) OVERRIDE;
     44   virtual void RequestPasskey(device::BluetoothDevice* device) OVERRIDE;
     45   virtual void DisplayPinCode(device::BluetoothDevice* device,
     46                               const std::string& pincode) OVERRIDE;
     47   virtual void DisplayPasskey(device::BluetoothDevice* device,
     48                               uint32 passkey) OVERRIDE;
     49   virtual void KeysEntered(device::BluetoothDevice* device,
     50                            uint32 entered) OVERRIDE;
     51   virtual void ConfirmPasskey(device::BluetoothDevice* device,
     52                               uint32 passkey) OVERRIDE;
     53   virtual void AuthorizePairing(device::BluetoothDevice* device) OVERRIDE;
     54 
     55  private:
     56   // Internal method called by BluetoothAdapterFactory to provide the adapter
     57   // object.
     58   void OnGetAdapter(scoped_refptr<device::BluetoothAdapter> adapter);
     59 
     60   // Presents a notification to the user when the adapter becomes discoverable
     61   // to other nearby devices.
     62   void NotifyAdapterDiscoverable();
     63 
     64   // Presents a notification to the user that a device |device| is making a
     65   // pairing request. The exact message to display is given in |message| and
     66   // should include all relevant instructions, if |with_buttons| is true then
     67   // the notification will have Accept and Reject buttons, if false only the
     68   // usual cancel/dismiss button will be present on the notification.
     69   void NotifyPairing(device::BluetoothDevice* device,
     70                      const base::string16& message,
     71                      bool with_buttons);
     72 
     73   // Clears any shown pairing notification now that the device has been paired.
     74   void NotifyPairedDevice(device::BluetoothDevice* device);
     75 
     76   // Reference to the underlying BluetoothAdapter object, holding this reference
     77   // ensures we stay around as the pairing delegate for that adapter.
     78   scoped_refptr<device::BluetoothAdapter> adapter_;
     79 
     80   // Set of currently paired devices, stored by Bluetooth address, used to
     81   // filter out property changes for devices that were previously paired.
     82   std::set<std::string> paired_devices_;
     83 
     84   // Note: This should remain the last member so it'll be destroyed and
     85   // invalidate its weak pointers before any other members are destroyed.
     86   base::WeakPtrFactory<BluetoothNotificationController> weak_ptr_factory_;
     87 
     88   DISALLOW_COPY_AND_ASSIGN(BluetoothNotificationController);
     89 };
     90 
     91 }  // namespace ash
     92 
     93 #endif  // ASH_SYSTEM_CHROMEOS_BLUETOOTH_BLUETOOTH_NOTIFICATION_CONTROLLER_H_
     94