/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_BaseBlobImpl_h

#define mozilla_dom_BaseBlobImpl_h

#include "mozilla/dom/BlobImpl.h"

namespace mozilla {

namespace dom {

class BaseBlobImpl : public BlobImpl {

 public:

  BaseBlobImpl(const nsAString& aName, const nsAString& aContentType,

               uint64_t aLength, int64_t aLastModifiedDate)

      : mIsFile(true),

        mImmutable(false),

        mContentType(aContentType),

        mName(aName),

        mStart(0),

        mLength(aLength),

        mLastModificationDate(aLastModifiedDate),

        mSerialNumber(NextSerialNumber()) {

    // Ensure non-null mContentType by default

    mContentType.SetIsVoid(false);

  }

  BaseBlobImpl(const nsAString& aName, const nsAString& aContentType,

               uint64_t aLength)

      : mIsFile(true),

        mImmutable(false),

        mContentType(aContentType),

        mName(aName),

        mStart(0),

        mLength(aLength),

        mLastModificationDate(INT64_MAX),

        mSerialNumber(NextSerialNumber()) {

    // Ensure non-null mContentType by default

    mContentType.SetIsVoid(false);

  }

  BaseBlobImpl(const nsAString& aContentType, uint64_t aLength)

      : mIsFile(false),

        mImmutable(false),

        mContentType(aContentType),

        mStart(0),

        mLength(aLength),

        mLastModificationDate(INT64_MAX),

        mSerialNumber(NextSerialNumber()) {

    // Ensure non-null mContentType by default

    mContentType.SetIsVoid(false);

  }

  BaseBlobImpl(const nsAString& aContentType, uint64_t aStart, uint64_t aLength)

      : mIsFile(false),

        mImmutable(false),

        mContentType(aContentType),

        mStart(aStart),

        mLength(aLength),

        mLastModificationDate(INT64_MAX),

        mSerialNumber(NextSerialNumber()) {

    MOZ_ASSERT(aLength != UINT64_MAX, "Must know length when creating slice");

    // Ensure non-null mContentType by default

    mContentType.SetIsVoid(false);

  }

  virtual void GetName(nsAString& aName) const override;

  virtual void GetDOMPath(nsAString& aName) const override;

  virtual void SetDOMPath(const nsAString& aName) override;

  virtual int64_t GetLastModified(ErrorResult& aRv) override;

  virtual void SetLastModified(int64_t aLastModified) override;

  virtual void GetMozFullPath(nsAString& aName,

                              SystemCallerGuarantee /* unused */,

                              ErrorResult& aRv) const override;

  virtual void GetMozFullPathInternal(nsAString& aFileName,

                                      ErrorResult& aRv) const override;

  virtual uint64_t GetSize(ErrorResult& aRv) override { return mLength; }

  virtual void GetType(nsAString& aType) override;

  size_t GetAllocationSize() const override { return 0; }

  virtual uint64_t GetSerialNumber() const override { return mSerialNumber; }

  virtual already_AddRefed<BlobImpl> CreateSlice(uint64_t aStart,

                                                 uint64_t aLength,

                                                 const nsAString& aContentType,

                                                 ErrorResult& aRv) override {

    return nullptr;

  }

  virtual const nsTArray<RefPtr<BlobImpl>>* GetSubBlobImpls() const override {

    return nullptr;

  }

  virtual void CreateInputStream(nsIInputStream** aStream,

                                 ErrorResult& aRv) override {

    aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);

  }

  virtual int64_t GetFileId() override;

  virtual nsresult GetSendInfo(nsIInputStream** aBody, uint64_t* aContentLength,

                               nsACString& aContentType,

                               nsACString& aCharset) override;

  virtual nsresult GetMutable(bool* aMutable) const override;

  virtual nsresult SetMutable(bool aMutable) override;

  virtual void SetLazyData(const nsAString& aName,

                           const nsAString& aContentType, uint64_t aLength,

                           int64_t aLastModifiedDate) override {

    mName = aName;

    mContentType = aContentType;

    mLength = aLength;

    mLastModificationDate = aLastModifiedDate;

    mIsFile = !aName.IsVoid();

  }

  virtual bool IsMemoryFile() const override { return false; }

  virtual bool IsDateUnknown() const override {

    return mIsFile && mLastModificationDate == INT64_MAX;

  }

  virtual bool IsFile() const override { return mIsFile; }

  virtual bool IsSizeUnknown() const override { return mLength == UINT64_MAX; }

 protected:

  virtual ~BaseBlobImpl() {}

  /**

   * Returns a new, effectively-unique serial number. This should be used

   * by implementations to obtain a serial number for GetSerialNumber().

   * The implementation is thread safe.

   */

  static uint64_t NextSerialNumber();

  bool mIsFile;

  bool mImmutable;

  nsString mContentType;

  nsString mName;

  nsString mPath;  // The path relative to a directory chosen by the user

  uint64_t mStart;

  uint64_t mLength;

  int64_t mLastModificationDate;

  const uint64_t mSerialNumber;

};

}  // namespace dom

}  // namespace mozilla

#endif  // mozilla_dom_BaseBlobImpl_h