/*
 * Copyright (C) 2010 Google Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef FileWriter_h
#define FileWriter_h

#include "bindings/core/v8/ActiveScriptWrappable.h"
#include "core/dom/ActiveDOMObject.h"
#include "core/dom/ExecutionContext.h"
#include "core/fileapi/FileError.h"
#include "modules/EventTargetModules.h"
#include "modules/filesystem/FileWriterBase.h"
#include "platform/heap/Handle.h"
#include "public/platform/WebFileWriterClient.h"

namespace blink {

class Blob;
class ExceptionState;
class ExecutionContext;

class FileWriter final : public EventTargetWithInlineData,
                         public FileWriterBase,
                         public ActiveScriptWrappable,
                         public ActiveDOMObject,
                         public WebFileWriterClient {
  DEFINE_WRAPPERTYPEINFO();
  USING_GARBAGE_COLLECTED_MIXIN(FileWriter);
  USING_PRE_FINALIZER(FileWriter, dispose);

 public:
  static FileWriter* create(ExecutionContext*);
  ~FileWriter() override;

  enum ReadyState { kInit = 0, kWriting = 1, kDone = 2 };

  void write(Blob*, ExceptionState&);
  void seek(long long position, ExceptionState&);
  void truncate(long long length, ExceptionState&);
  void abort(ExceptionState&);
  ReadyState getReadyState() const { return m_readyState; }
  DOMException* error() const { return m_error.get(); }

  // WebFileWriterClient
  void didWrite(long long bytes, bool complete) override;
  void didTruncate() override;
  void didFail(WebFileError) override;

  // ActiveDOMObject
  void contextDestroyed() override;

  // ScriptWrappable
  bool hasPendingActivity() const final;

  // EventTarget
  const AtomicString& interfaceName() const override;
  ExecutionContext* getExecutionContext() const override {
    return ActiveDOMObject::getExecutionContext();
  }

  DEFINE_ATTRIBUTE_EVENT_LISTENER(writestart);
  DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
  DEFINE_ATTRIBUTE_EVENT_LISTENER(write);
  DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
  DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
  DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend);

  DECLARE_VIRTUAL_TRACE();

 private:
  enum Operation {
    OperationNone,
    OperationWrite,
    OperationTruncate,
    OperationAbort
  };

  explicit FileWriter(ExecutionContext*);

  void completeAbort();

  void doOperation(Operation);

  void signalCompletion(FileError::ErrorCode);

  void fireEvent(const AtomicString& type);

  void setError(FileError::ErrorCode, ExceptionState&);

  void dispose();

  Member<DOMException> m_error;
  ReadyState m_readyState;
  Operation m_operationInProgress;
  Operation m_queuedOperation;
  long long m_bytesWritten;
  long long m_bytesToWrite;
  long long m_truncateLength;
  long long m_numAborts;
  long long m_recursionDepth;
  double m_lastProgressNotificationTimeMS;
  Member<Blob> m_blobBeingWritten;
};

}  // namespace blink

#endif  // FileWriter_h
