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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2015 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_JSONDB_HPP
#define ZT_JSONDB_HPP
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <map>
#include <stdexcept>
#include <vector>
#include <algorithm>
#include "../node/Constants.hpp"
#include "../node/Utils.hpp"
#include "../ext/json/json.hpp"
#include "../osdep/OSUtils.hpp"
namespace ZeroTier {
/**
* Hierarchical JSON store that persists into the filesystem
*/
class JSONDB
{
public:
JSONDB(const std::string &basePath) :
_basePath(basePath)
{
_reload(_basePath,std::string());
}
inline void reload()
{
_db.clear();
_reload(_basePath,std::string());
}
bool writeRaw(const std::string &n,const std::string &obj);
bool put(const std::string &n,const nlohmann::json &obj);
inline bool put(const std::string &n1,const std::string &n2,const nlohmann::json &obj) { return this->put((n1 + "/" + n2),obj); }
inline bool put(const std::string &n1,const std::string &n2,const std::string &n3,const nlohmann::json &obj) { return this->put((n1 + "/" + n2 + "/" + n3),obj); }
inline bool put(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,const nlohmann::json &obj) { return this->put((n1 + "/" + n2 + "/" + n3 + "/" + n4),obj); }
inline bool put(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,const std::string &n5,const nlohmann::json &obj) { return this->put((n1 + "/" + n2 + "/" + n3 + "/" + n4 + "/" + n5),obj); }
const nlohmann::json &get(const std::string &n);
inline const nlohmann::json &get(const std::string &n1,const std::string &n2) { return this->get((n1 + "/" + n2)); }
inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3) { return this->get((n1 + "/" + n2 + "/" + n3)); }
inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4) { return this->get((n1 + "/" + n2 + "/" + n3 + "/" + n4)); }
inline const nlohmann::json &get(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,const std::string &n5) { return this->get((n1 + "/" + n2 + "/" + n3 + "/" + n4 + "/" + n5)); }
void erase(const std::string &n);
inline void erase(const std::string &n1,const std::string &n2) { this->erase(n1 + "/" + n2); }
inline void erase(const std::string &n1,const std::string &n2,const std::string &n3) { this->erase(n1 + "/" + n2 + "/" + n3); }
inline void erase(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4) { this->erase(n1 + "/" + n2 + "/" + n3 + "/" + n4); }
inline void erase(const std::string &n1,const std::string &n2,const std::string &n3,const std::string &n4,const std::string &n5) { this->erase(n1 + "/" + n2 + "/" + n3 + "/" + n4 + "/" + n5); }
template<typename F>
inline void filter(const std::string &prefix,F func)
{
for(std::map<std::string,_E>::iterator i(_db.lower_bound(prefix));i!=_db.end();) {
if ((i->first.length() >= prefix.length())&&(!memcmp(i->first.data(),prefix.data(),prefix.length()))) {
if (!func(i->first,get(i->first))) {
std::map<std::string,_E>::iterator i2(i); ++i2;
this->erase(i->first);
i = i2;
} else ++i;
} else break;
}
}
inline bool operator==(const JSONDB &db) const { return ((_basePath == db._basePath)&&(_db == db._db)); }
inline bool operator!=(const JSONDB &db) const { return (!(*this == db)); }
private:
void _reload(const std::string &p,const std::string &b);
bool _isValidObjectName(const std::string &n);
std::string _genPath(const std::string &n,bool create);
struct _E
{
nlohmann::json obj;
inline bool operator==(const _E &e) const { return (obj == e.obj); }
inline bool operator!=(const _E &e) const { return (obj != e.obj); }
};
std::string _basePath;
std::map<std::string,_E> _db;
};
} // namespace ZeroTier
#endif
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