// Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_FUNCTION_REMOVE_H_
#define CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_FUNCTION_REMOVE_H_

#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/chromeos/gdata/drive_resource_metadata.h"
#include "chrome/browser/google_apis/gdata_errorcode.h"

class FilePath;
class GURL;

namespace gdata {

class DriveCache;
class DriveEntryProto;
class DriveFileSystem;
class DriveServiceInterface;

class DriveFunctionRemove {
 public:
  DriveFunctionRemove(DriveServiceInterface* drive_service,
                      DriveFileSystem* file_system,
                      DriveCache* cache);
  ~DriveFunctionRemove();

  void Remove(const FilePath& file_path,
              bool is_recursive,
              const FileOperationCallback& callback);

 private:
  // Part of Remove(). Called after GetEntryInfoByPath() is complete.
  // |callback| must not be null.
  void RemoveAfterGetEntryInfo(
      const FileOperationCallback& callback,
      DriveFileError error,
      scoped_ptr<DriveEntryProto> entry_proto);

  // Perform the actual delete operation.
  void DoDelete(const FileOperationCallback& callback,
                int retry_count,
                scoped_ptr<DriveEntryProto> entry_proto);

  // Check the result of the delete operation.  If it failed due to flooding the
  // server, retry up to kMaxRetries times.
  void RetryIfNeeded(const FileOperationCallback& callback,
                     int retry_count,
                     scoped_ptr<DriveEntryProto> entry_proto,
                     GDataErrorCode status,
                     const GURL& /* document_url */);

  // Callback for DriveServiceInterface::DeleteDocument. Removes the entry with
  // |resource_id| from the local snapshot of the filesystem and the cache.
  // |document_url| is unused. |callback| must not be null.
  void RemoveResourceLocally(
      const FileOperationCallback& callback,
      const std::string& resource_id,
      GDataErrorCode status);

  // Sends notification for directory changes. Notifies of directory changes,
  // and runs |callback| with |error|. |callback| may be null.
  void NotifyDirectoryChanged(
      const FileOperationCallback& callback,
      DriveFileError error,
      const FilePath& directory_path);

  DriveServiceInterface* drive_service_;
  DriveFileSystem* file_system_;
  DriveCache* cache_;

  // WeakPtrFactory bound to the UI thread.
  // Note: This should remain the last member so it'll be destroyed and
  // invalidate the weak pointers before any other members are destroyed.
  base::WeakPtrFactory<DriveFunctionRemove> weak_ptr_factory_;

  DISALLOW_COPY_AND_ASSIGN(DriveFunctionRemove);
};

}  // namespace gdata

#endif  // CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_FUNCTION_REMOVE_H_