third_party/blink/renderer/modules/bluetooth/bluetooth.h

// Copyright 2014 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.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_BLUETOOTH_BLUETOOTH_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_BLUETOOTH_BLUETOOTH_H_

#include "mojo/public/cpp/bindings/associated_receiver_set.h"
#include "mojo/public/cpp/bindings/receiver_set.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/bluetooth/web_bluetooth.mojom-blink-forward.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/core/page/page_visibility_observer.h"
#include "third_party/blink/renderer/modules/bluetooth/bluetooth_device.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/handle.h"

namespace blink {

class BluetoothLEScanOptions;
class RequestDeviceOptions;
class ScriptPromise;
class ScriptState;

class Bluetooth final : public EventTargetWithInlineData,
                        public ContextLifecycleObserver,
                        public PageVisibilityObserver,
                        public mojom::blink::WebBluetoothScanClient {
  DEFINE_WRAPPERTYPEINFO();
  USING_GARBAGE_COLLECTED_MIXIN(Bluetooth);

 public:
  explicit Bluetooth(ExecutionContext*);
  ~Bluetooth() override;

  // IDL exposed interface:
  ScriptPromise getAvailability(ScriptState*);
  ScriptPromise requestDevice(ScriptState*,
                              const RequestDeviceOptions*,
                              ExceptionState&);

  ScriptPromise requestLEScan(ScriptState*,
                              const BluetoothLEScanOptions*,
                              ExceptionState&);

  mojom::blink::WebBluetoothService* Service() { return service_.get(); }

  // WebBluetoothScanClient
  void ScanEvent(mojom::blink::WebBluetoothScanResultPtr result) override;

  // EventTarget
  const AtomicString& InterfaceName() const override;
  ExecutionContext* GetExecutionContext() const override;

  // GC
  void Trace(blink::Visitor*) override;

  // ContextLifecycleObserver
  void ContextDestroyed(ExecutionContext*) override;

  DEFINE_ATTRIBUTE_EVENT_LISTENER(advertisementreceived, kAdvertisementreceived)

  // PageVisibilityObserver
  void PageVisibilityChanged() override;

  void CancelScan(mojo::ReceiverId);
  bool IsScanActive(mojo::ReceiverId) const;

 private:
  BluetoothDevice* GetBluetoothDeviceRepresentingDevice(
      mojom::blink::WebBluetoothDevicePtr,
      ExecutionContext*);

  void RequestDeviceCallback(ScriptPromiseResolver*,
                             mojom::blink::WebBluetoothResult,
                             mojom::blink::WebBluetoothDevicePtr);

  void RequestScanningCallback(ScriptPromiseResolver*,
                               mojo::ReceiverId id,
                               mojom::blink::RequestScanningStartResultPtr);

  void EnsureServiceConnection(ExecutionContext*);

  // Map of device ids to BluetoothDevice objects.
  // Ensures only one BluetoothDevice instance represents each
  // Bluetooth device inside a single global object.
  HeapHashMap<String, Member<BluetoothDevice>> device_instance_map_;

  mojo::AssociatedReceiverSet<mojom::blink::WebBluetoothScanClient>
      client_receivers_;

  mojo::Remote<mojom::blink::WebBluetoothService> service_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_BLUETOOTH_BLUETOOTH_H_