Move non-API code out of sync/api/attachments/

sync/api/attachments/attachment_service_impl.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 SYNC_API_ATTACHMENTS_ATTACHMENT_SERVICE_IMPL_H_
-#define SYNC_API_ATTACHMENTS_ATTACHMENT_SERVICE_IMPL_H_
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
-#include "sync/api/attachments/attachment_downloader.h"
-#include "sync/api/attachments/attachment_service.h"
-#include "sync/api/attachments/attachment_service_proxy.h"
-#include "sync/api/attachments/attachment_store.h"
-#include "sync/api/attachments/attachment_uploader.h"
-
-namespace syncer {
-
-// Implementation of AttachmentService.
-class SYNC_EXPORT AttachmentServiceImpl : public AttachmentService,
-                                          public base::NonThreadSafe {
- public:
-  // |delegate| is optional delegate for AttachmentService to notify about
-  // asynchronous events (AttachmentUploaded). Pass NULL if delegate is not
-  // provided. AttachmentService doesn't take ownership of delegate, the pointer
-  // must be valid throughout AttachmentService lifetime.
-  //
-  // |attachment_uploader| is optional. If null, attachments will never be
-  // uploaded to the sync server and |delegate|'s OnAttachmentUploaded will
-  // never be invoked.
-  //
-  // |attachment_downloader| is optional. If null, attachments will never be
-  // downloaded. Only attachments in |attachment_store| will be returned from
-  // GetOrDownloadAttachments.
-
-  AttachmentServiceImpl(scoped_ptr<AttachmentStore> attachment_store,
-                        scoped_ptr<AttachmentUploader> attachment_uploader,
-                        scoped_ptr<AttachmentDownloader> attachment_downloader,
-                        Delegate* delegate);
-  virtual ~AttachmentServiceImpl();
-
-  // Create an AttachmentServiceImpl suitable for use in tests.
-  static scoped_ptr<syncer::AttachmentService> CreateForTest();
-
-  // AttachmentService implementation.
-  virtual void GetOrDownloadAttachments(const AttachmentIdList& attachment_ids,
-                                        const GetOrDownloadCallback& callback)
-      OVERRIDE;
-  virtual void DropAttachments(const AttachmentIdList& attachment_ids,
-                               const DropCallback& callback) OVERRIDE;
-  virtual void StoreAttachments(const AttachmentList& attachments,
-                                const StoreCallback& callback) OVERRIDE;
-
- private:
-  class GetOrDownloadState;
-
-  void ReadDone(const scoped_refptr<GetOrDownloadState>& state,
-                const AttachmentStore::Result& result,
-                scoped_ptr<AttachmentMap> attachments,
-                scoped_ptr<AttachmentIdList> unavailable_attachment_ids);
-  void DropDone(const DropCallback& callback,
-                const AttachmentStore::Result& result);
-  void WriteDone(const StoreCallback& callback,
-                 const AttachmentStore::Result& result);
-  void UploadDone(const AttachmentUploader::UploadResult& result,
-                  const AttachmentId& attachment_id);
-  void DownloadDone(const scoped_refptr<GetOrDownloadState>& state,
-                    const AttachmentId& attachment_id,
-                    const AttachmentDownloader::DownloadResult& result,
-                    scoped_ptr<Attachment> attachment);
-
-  const scoped_ptr<AttachmentStore> attachment_store_;
-
-  // May be null.
-  const scoped_ptr<AttachmentUploader> attachment_uploader_;
-
-  // May be null.
-  const scoped_ptr<AttachmentDownloader> attachment_downloader_;
-
-  // May be null.
-  Delegate* delegate_;
-
-  // Must be last data member.
-  base::WeakPtrFactory<AttachmentServiceImpl> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(AttachmentServiceImpl);
-};
-
-}  // namespace syncer
-
-#endif  // SYNC_API_ATTACHMENTS_ATTACHMENT_SERVICE_IMPL_H_