/* 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 DOM_QUOTA_SCOPEDLOGEXTRAINFO_H_
#define DOM_QUOTA_SCOPEDLOGEXTRAINFO_H_

#include <map>

#include "mozilla/Attributes.h"
#include "mozilla/Tainting.h"
#include "mozilla/ThreadLocal.h"
#include "mozilla/dom/quota/Config.h"
#include "nsString.h"
#include "nsXULAppAPI.h"

namespace mozilla::dom::quota {

struct MOZ_STACK_CLASS ScopedLogExtraInfo {
  static constexpr const char kTagQueryTainted[] = "query";
  static constexpr const char kTagContextTainted[] = "context";
  // Using the storage origin (instead of normal origin) on purpose to store
  // the masked origin (uuid based) on the stack for origins partitioned for
  // private browsing.
  static constexpr const char kTagStorageOriginTainted[] = "storage-origin";

#ifdef QM_SCOPED_LOG_EXTRA_INFO_ENABLED
 private:
  static auto FindSlot(const char* aTag);

 public:
  template <size_t N>
  ScopedLogExtraInfo(const char (&aTag)[N], const nsACString& aExtraInfo)
      : mTag{aTag}, mPreviousValue(nullptr), mCurrentValue{aExtraInfo} {
    AddInfo();
  }

  ~ScopedLogExtraInfo();

  ScopedLogExtraInfo(ScopedLogExtraInfo&& aOther) noexcept;
  ScopedLogExtraInfo& operator=(ScopedLogExtraInfo&& aOther) = delete;

  ScopedLogExtraInfo(const ScopedLogExtraInfo&) = delete;
  ScopedLogExtraInfo& operator=(const ScopedLogExtraInfo&) = delete;

  using ScopedLogExtraInfoMap =
      std::map<const char*, const Tainted<nsCString>*>;
  static ScopedLogExtraInfoMap GetExtraInfoMap();

  static void Initialize();

 private:
  const char* mTag;
  const Tainted<nsCString>* mPreviousValue;
  Tainted<nsCString> mCurrentValue;

  static MOZ_THREAD_LOCAL(const Tainted<nsCString>*) sQueryValueTainted;
  static MOZ_THREAD_LOCAL(const Tainted<nsCString>*) sContextValueTainted;
  static MOZ_THREAD_LOCAL(const Tainted<nsCString>*) sStorageOriginValueTainted;

  void AddInfo();
#else
  template <size_t N>
  ScopedLogExtraInfo(const char (&aTag)[N], const nsACString& aExtraInfo) {}

  // user-defined to silence unused variable warnings
  ~ScopedLogExtraInfo() {}
#endif
};

}  // namespace mozilla::dom::quota

#endif  // DOM_QUOTA_SCOPEDLOGEXTRAINFO_H_