/* -*- 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_cache_TypesUtils_h
#define mozilla_dom_cache_TypesUtils_h

#include "mozilla/Attributes.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/InternalHeaders.h"
#include "nsError.h"

class nsIGlobalObject;
class nsIAsyncInputStream;
class nsIInputStream;

namespace mozilla {

namespace ipc {
class PBackgroundChild;
class AutoIPCStream;
}

namespace dom {

struct CacheQueryOptions;
class InternalRequest;
class InternalResponse;
class OwningRequestOrUSVString;
class Request;
class RequestOrUSVString;
class Response;

namespace cache {

class CacheQueryParams;
class CacheReadStream;
class CacheReadStreamOrVoid;
class CacheRequest;
class CacheResponse;
class HeadersEntry;

class TypeUtils
{
public:
  enum BodyAction
  {
    IgnoreBody,
    ReadBody
  };

  enum SchemeAction
  {
    IgnoreInvalidScheme,
    TypeErrorOnInvalidScheme
  };

  ~TypeUtils() { }
  virtual nsIGlobalObject* GetGlobalObject() const = 0;
#ifdef DEBUG
  virtual void AssertOwningThread() const = 0;
#else
  inline void AssertOwningThread() const { }
#endif

  // This is mainly declared to support serializing body streams.  Some
  // TypeUtils implementations do not expect to be used for this kind of
  // serialization.  These classes will MOZ_CRASH() if you try to call
  // GetIPCManager().
  virtual mozilla::ipc::PBackgroundChild*
  GetIPCManager() = 0;

  already_AddRefed<InternalRequest>
  ToInternalRequest(JSContext* aCx, const RequestOrUSVString& aIn,
                    BodyAction aBodyAction, ErrorResult& aRv);

  already_AddRefed<InternalRequest>
  ToInternalRequest(JSContext* aCx, const OwningRequestOrUSVString& aIn,
                    BodyAction aBodyAction, ErrorResult& aRv);

  void
  ToCacheRequest(CacheRequest& aOut, InternalRequest* aIn,
                 BodyAction aBodyAction, SchemeAction aSchemeAction,
                 nsTArray<UniquePtr<mozilla::ipc::AutoIPCStream>>& aStreamCleanupList,
                 ErrorResult& aRv);

  void
  ToCacheResponseWithoutBody(CacheResponse& aOut, InternalResponse& aIn,
                             ErrorResult& aRv);

  void
  ToCacheResponse(JSContext* aCx, CacheResponse& aOut, Response& aIn,
                  nsTArray<UniquePtr<mozilla::ipc::AutoIPCStream>>& aStreamCleanupList,
                  ErrorResult& aRv);

  void
  ToCacheQueryParams(CacheQueryParams& aOut, const CacheQueryOptions& aIn);

  already_AddRefed<Response>
  ToResponse(const CacheResponse& aIn);

  already_AddRefed<InternalRequest>
  ToInternalRequest(const CacheRequest& aIn);

  already_AddRefed<Request>
  ToRequest(const CacheRequest& aIn);

  // static methods
  static already_AddRefed<InternalHeaders>
  ToInternalHeaders(const nsTArray<HeadersEntry>& aHeadersEntryList,
                    HeadersGuardEnum aGuard = HeadersGuardEnum::None);

  // Utility method for parsing a URL and doing associated operations.  A mix
  // of things are done in this one method to avoid duplicated parsing:
  //
  //  1) The aUrl argument is modified to strip the fragment
  //  2) If aSchemaValidOut is set, then a boolean value is set indicating
  //     if the aUrl's scheme is valid or not for storing in the cache.
  //  3) If aUrlWithoutQueryOut is set, then a url string is provided without
  //     the search section.
  //  4) If aUrlQueryOut is set then its populated with the search section
  //     of the URL.  Note, this parameter must be set if aUrlWithoutQueryOut
  //     is set.  They must either both be nullptr or set to valid string
  //     pointers.
  //
  // Any errors are thrown on ErrorResult.
  static void
  ProcessURL(nsACString& aUrl, bool* aSchemeValidOut,
             nsACString* aUrlWithoutQueryOut, nsACString* aUrlQueryOut,
             ErrorResult& aRv);

private:
  void
  CheckAndSetBodyUsed(JSContext* aCx, Request* aRequest, BodyAction aBodyAction,
                      ErrorResult& aRv);

  already_AddRefed<InternalRequest>
  ToInternalRequest(const nsAString& aIn, ErrorResult& aRv);

  void
  SerializeCacheStream(nsIInputStream* aStream, CacheReadStreamOrVoid* aStreamOut,
                       nsTArray<UniquePtr<mozilla::ipc::AutoIPCStream>>& aStreamCleanupList,
                       ErrorResult& aRv);

  void
  SerializeSendStream(nsIInputStream* aStream, CacheReadStream& aReadStreamOut,
                      ErrorResult& aRv);
};

} // namespace cache
} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_cache_TypesUtils_h