// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_NETWORK_HTTP_AUTH_CACHE_PROXY_COPIER_H_
#define SERVICES_NETWORK_HTTP_AUTH_CACHE_PROXY_COPIER_H_

#include <map>
#include <memory>

#include "base/unguessable_token.h"

namespace net {
class HttpAuthCache;
}

namespace network {

// Facilitates copying the proxy entries of one HttpAuthCache into another via
// an intermediate cache. This allows copying between two HttpAuthCache
// instances that cannot both be accessed at the same time, such as the
// HttpAuthCaches in two NetworkContexts.
class HttpAuthCacheProxyCopier {
 public:
  HttpAuthCacheProxyCopier();

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

  ~HttpAuthCacheProxyCopier();

  // Saves the proxy entries of the given HttpAuthCache in an intermediate
  // HttpAuthCache and returns a key that can be used to load the saved contents
  // into another HttpAuthCache via the LoadHttpAuthCache method.
  base::UnguessableToken SaveHttpAuthCache(const net::HttpAuthCache& cache);

  // Loads the HttpAuthCache previously saved via a call to SaveHttpAuthCache
  // into the given HttpAuthCache instance and deletes the previously saved
  // HttpAuthCache.
  void LoadHttpAuthCache(const base::UnguessableToken& key,
                         net::HttpAuthCache* cache);

 private:
  std::map<base::UnguessableToken, std::unique_ptr<net::HttpAuthCache>> caches_;
};

}  // namespace network

#endif  // SERVICES_NETWORK_HTTP_AUTH_CACHE_PROXY_COPIER_H_