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+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2018  ZeroTier, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ZT_CONTROLLER_DB_HPP
+#define ZT_CONTROLLER_DB_HPP
+
+#include "../node/Constants.hpp"
+#include "../node/Identity.hpp"
+#include "../node/InetAddress.hpp"
+#include "../osdep/OSUtils.hpp"
+#include "../osdep/BlockingQueue.hpp"
+
+#include <memory>
+#include <string>
+#include <thread>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+#include <atomic>
+
+#include "../ext/json/json.hpp"
+
+#define ZT_CONTROLLER_RETHINKDB_COMMIT_THREADS 2
+
+namespace ZeroTier
+{
+
+class EmbeddedNetworkController;
+
+/**
+ * Base class with common infrastructure for all controller DB implementations
+ */
+class DB
+{
+public:
+	struct NetworkSummaryInfo
+	{
+		NetworkSummaryInfo() : authorizedMemberCount(0),totalMemberCount(0),mostRecentDeauthTime(0) {}
+		std::vector<Address> activeBridges;
+		std::vector<InetAddress> allocatedIps;
+		unsigned long authorizedMemberCount;
+		unsigned long totalMemberCount;
+		int64_t mostRecentDeauthTime;
+	};
+
+	/**
+	 * Ensure that all network fields are present
+	 */
+	static void initNetwork(nlohmann::json &network);
+
+	/**
+	 * Ensure that all member fields are present
+	 */
+	static void initMember(nlohmann::json &member);
+
+	/**
+	 * Remove old and temporary network fields
+	 */
+	static void cleanNetwork(nlohmann::json &network);
+
+	/**
+	 * Remove old and temporary member fields
+	 */
+	static void cleanMember(nlohmann::json &member);
+
+	DB(EmbeddedNetworkController *const nc,const Identity &myId,const char *path);
+	virtual ~DB();
+
+	virtual bool waitForReady() = 0;
+
+	inline bool hasNetwork(const uint64_t networkId) const
+	{
+		std::lock_guard<std::mutex> l(_networks_l);
+		return (_networks.find(networkId) != _networks.end());
+	}
+
+	bool get(const uint64_t networkId,nlohmann::json &network);
+	bool get(const uint64_t networkId,nlohmann::json &network,const uint64_t memberId,nlohmann::json &member);
+	bool get(const uint64_t networkId,nlohmann::json &network,const uint64_t memberId,nlohmann::json &member,NetworkSummaryInfo &info);
+	bool get(const uint64_t networkId,nlohmann::json &network,std::vector<nlohmann::json> &members);
+
+	bool summary(const uint64_t networkId,NetworkSummaryInfo &info);
+
+	void networks(std::vector<uint64_t> &networks);
+
+	virtual void save(nlohmann::json *orig,nlohmann::json &record) = 0;
+
+	virtual void eraseNetwork(const uint64_t networkId) = 0;
+
+	virtual void eraseMember(const uint64_t networkId,const uint64_t memberId) = 0;
+
+	virtual void nodeIsOnline(const uint64_t networkId,const uint64_t memberId,const InetAddress &physicalAddress) = 0;
+
+protected:
+	struct _Network
+	{
+		_Network() : mostRecentDeauthTime(0) {}
+		nlohmann::json config;
+		std::unordered_map<uint64_t,nlohmann::json> members;
+		std::unordered_set<uint64_t> activeBridgeMembers;
+		std::unordered_set<uint64_t> authorizedMembers;
+		std::unordered_set<InetAddress,InetAddress::Hasher> allocatedIps;
+		int64_t mostRecentDeauthTime;
+		std::mutex lock;
+	};
+
+	void _memberChanged(nlohmann::json &old,nlohmann::json &memberConfig,bool push);
+	void _networkChanged(nlohmann::json &old,nlohmann::json &networkConfig,bool push);
+	void _fillSummaryInfo(const std::shared_ptr<_Network> &nw,NetworkSummaryInfo &info);
+
+	EmbeddedNetworkController *const _controller;
+	const Identity _myId;
+	const Address _myAddress;
+	const std::string _path;
+	std::string _myAddressStr;
+
+	std::unordered_map< uint64_t,std::shared_ptr<_Network> > _networks;
+	std::unordered_multimap< uint64_t,uint64_t > _networkByMember;
+	mutable std::mutex _networks_l;
+};
+
+} // namespace ZeroTier
+
+#endif