text: // Copyright 2019 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_BACKGROUND_SYNC_PERIODIC_SYNC_MANAGER_H_
  #define THIRD_PARTY_BLINK_RENDERER_MODULES_BACKGROUND_SYNC_PERIODIC_SYNC_MANAGER_H_
  
  #include "base/memory/scoped_refptr.h"
  #include "base/sequenced_task_runner.h"
  #include "mojo/public/cpp/bindings/remote.h"
  #include "third_party/blink/public/mojom/background_sync/background_sync.mojom-blink.h"
  #include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
  #include "third_party/blink/renderer/platform/wtf/vector.h"
  
  namespace blink {
  
  class BackgroundSyncOptions;
  class ExceptionState;
  class ScriptPromise;
  class ScriptPromiseResolver;
  class ScriptState;
  class ServiceWorkerRegistration;
  
  class PeriodicSyncManager final : public ScriptWrappable {
    DEFINE_WRAPPERTYPEINFO();
  
   public:
    PeriodicSyncManager(ServiceWorkerRegistration* registration,
                        scoped_refptr<base::SequencedTaskRunner> task_runner);
  
    // IDL exposed interface
    ScriptPromise registerPeriodicSync(ScriptState* script_state,
                                       const String& tag,
                                       const BackgroundSyncOptions* options,
                                       ExceptionState& exception_state);
    ScriptPromise getTags(ScriptState* script_state);
    ScriptPromise unregister(ScriptState* script_state, const String& tag);
  
    void Trace(Visitor* visitor) override;
  
   private:
    // Returns an initialized
    // mojo::Remote<mojom::blink::PeriodicBackgroundSyncService>. A connection
    // with the the browser's BackgroundSyncService is created the first time this
    // method is called.
    const mojo::Remote<mojom::blink::PeriodicBackgroundSyncService>&
    GetBackgroundSyncServiceRemote();
  
    // Callbacks
    void RegisterCallback(ScriptPromiseResolver* resolver,
                          mojom::blink::BackgroundSyncError error,
                          mojom::blink::SyncRegistrationOptionsPtr options);
    void GetRegistrationsCallback(
        ScriptPromiseResolver* resolver,
        mojom::blink::BackgroundSyncError error,
        WTF::Vector<mojom::blink::SyncRegistrationOptionsPtr> registrations);
    void UnregisterCallback(ScriptPromiseResolver* resolver,
                            mojom::blink::BackgroundSyncError error);
  
    Member<ServiceWorkerRegistration> registration_;
    scoped_refptr<base::SequencedTaskRunner> task_runner_;
    mojo::Remote<mojom::blink::PeriodicBackgroundSyncService>
        background_sync_service_;
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_BACKGROUND_SYNC_PERIODIC_SYNC_MANAGER_H_
  