Licensing.h

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/* Copyright 2013-2019 Homegear GmbH
 *
 * libhomegear-base is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * libhomegear-base 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with libhomegear-base.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU Lesser General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
*/

#ifndef LICENSING_H_
#define LICENSING_H_

#include <string>
#include <vector>
#include <map>
#include <memory>
#include <mutex>

namespace BaseLib
{

class SharedObjects;

namespace Licensing
{

class Licensing
{
public:
    struct DeviceInfo
    {
        int32_t moduleId = -1;
        int32_t familyId = -1;
        int32_t deviceId = -1;
        bool state = false;
        std::string licenseKey;
    } __attribute__((aligned(64)));

    typedef std::shared_ptr<DeviceInfo> PDeviceInfo;
    typedef std::map<int32_t, std::map<int32_t, PDeviceInfo>> DeviceStates;

    explicit Licensing(BaseLib::SharedObjects* bl);
    virtual ~Licensing();

    virtual bool init() = 0;
    virtual void dispose();
    virtual void load();

    virtual int32_t getModuleId() { return _moduleId; }

    virtual DeviceStates getDeviceStates();

    virtual bool getDeviceState(int32_t familyId, int32_t deviceId);

    virtual int32_t checkLicense(int32_t familyId, int32_t deviceId, const std::string& licenseKey = "") = 0;

    virtual void removeLicense(int32_t familyId, int32_t deviceId);

    virtual std::string getLicenseKey(int32_t familyId, int32_t deviceId);

    virtual int64_t getTrialStartTime(int32_t familyId, int32_t deviceId);

    virtual void decryptScript(const std::vector<char>& input, std::string& output) = 0;
    virtual void decryptDeviceDescription(const std::vector<char>& input, std::vector<char>& output) = 0;
protected:
    struct LicenseData
    {
        std::string licenseKey;
        std::string activationKey;
    } __attribute__((aligned(64)));

    BaseLib::SharedObjects* _bl = nullptr;
    bool _disposed = false;
    int32_t _moduleId = -1;
    std::map<uint64_t, uint32_t> _variableDatabaseIds;
    std::map<uint64_t, LicenseData> _licenseData;
    std::mutex _devicesMutex;
    DeviceStates _devices;

    uint64_t getMapKey(int32_t familyId, int32_t deviceId);
    virtual void addDevice(int32_t familyId, int32_t deviceId, bool state, std::string licenseKey);
    virtual void removeDevice(int32_t familyId, int32_t deviceId);
    virtual void updateDevice(int32_t familyId, int32_t deviceId, bool state, std::string licenseKey);
    virtual void loadVariables();
    virtual void saveVariable(uint64_t index, int32_t intValue);
    virtual void saveVariable(uint64_t index, int64_t intValue);
    virtual void saveVariable(uint64_t index, std::string& stringValue);
    virtual void saveVariable(uint64_t index, std::vector<uint8_t>& binaryValue);
    virtual void saveVariable(uint64_t index, LicenseData& licenseData);
};

}
}

#endif