/*
 * 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.
 */

#include "modules/filesystem/FileWriterSync.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/fileapi/Blob.h"
#include "public/platform/WebFileWriter.h"
#include "public/platform/WebURL.h"

namespace blink {

void FileWriterSync::write(Blob* data, ExceptionState& exceptionState) {
  ASSERT(data);
  ASSERT(writer());
  ASSERT(m_complete);

  prepareForWrite();
  writer()->write(position(), data->uuid());
  ASSERT(m_complete);
  if (m_error) {
    FileError::throwDOMException(exceptionState, m_error);
    return;
  }
  setPosition(position() + data->size());
  if (position() > length())
    setLength(position());
}

void FileWriterSync::seek(long long position, ExceptionState& exceptionState) {
  ASSERT(writer());
  ASSERT(m_complete);
  seekInternal(position);
}

void FileWriterSync::truncate(long long offset,
                              ExceptionState& exceptionState) {
  ASSERT(writer());
  ASSERT(m_complete);
  if (offset < 0) {
    exceptionState.throwDOMException(InvalidStateError,
                                     FileError::invalidStateErrorMessage);
    return;
  }
  prepareForWrite();
  writer()->truncate(offset);
  ASSERT(m_complete);
  if (m_error) {
    FileError::throwDOMException(exceptionState, m_error);
    return;
  }
  if (offset < position())
    setPosition(offset);
  setLength(offset);
}

void FileWriterSync::didWrite(long long bytes, bool complete) {
  DCHECK_EQ(FileError::kOK, m_error);
#if DCHECK_IS_ON()
  DCHECK(!m_complete);
  m_complete = complete;
#endif
}

void FileWriterSync::didTruncate() {
  DCHECK_EQ(FileError::kOK, m_error);
#if DCHECK_IS_ON()
  DCHECK(!m_complete);
  m_complete = true;
#endif
}

void FileWriterSync::didFail(WebFileError error) {
  DCHECK_EQ(FileError::kOK, m_error);
  m_error = static_cast<FileError::ErrorCode>(error);
#if DCHECK_IS_ON()
  DCHECK(!m_complete);
  m_complete = true;
#endif
}

FileWriterSync::FileWriterSync()
    : m_error(FileError::kOK)
#if DCHECK_IS_ON()
      ,
      m_complete(true)
#endif
{
}

void FileWriterSync::prepareForWrite() {
#if DCHECK_IS_ON()
  DCHECK(m_complete);
#endif
  m_error = FileError::kOK;
#if DCHECK_IS_ON()
  m_complete = false;
#endif
}

FileWriterSync::~FileWriterSync() {}

DEFINE_TRACE(FileWriterSync) {
  FileWriterBase::trace(visitor);
}

}  // namespace blink