SystemHandler.h

/*
    Copyright (c) 2014 by Elvis Angelaccio

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
*/

#ifndef SYSTEM_HANDLER_H
#define SYSTEM_HANDLER_H


#include <string>
#include <map>
#include <vector>
#include <stdexcept>

#include "../entity/DataSetSpecifier.h"
#include "../entity/DataSet.h"

namespace server
{

    class SystemHandler
    {
        
    public:
        
        SystemHandler(const std::string &dataDir, const std::string &confDir);
        
        void setDataDirectory(const std::string &datatDir);
        
        void setConfDirectory(const std::string &confDir);
        
        std::string initDatabase();

        std::string findNewDSS();

        void fillDssList(std::vector<std::string> &dssList);
        
        bool empty();
        
        bool holdsDss(const std::string &dss);
        
        bool holdsDataSet(const std::string& dssName, int sequenceNumber);

        entity::DataSetSpecifier &getDss(const std::string &dssName);

        void generateSequenceNumber(const std::string &dssName, entity::DataSet &dataSet);
        
        void addDataSet(const std::string &dssName, entity::DataSet &dataSet);
        
        std::string getStorePath(const std::string &dssName, const std::string &itemName, int sequenceNumber, entity::Group group, entity::Tag tag);
        
        std::string getStorePath(const std::string &dssName, int sequenceNumber);
        
        bool removeDataSet(const std::string &dssName, int sequenceNumber);

        entity::DataSet getDataSet(const std::string &dssName, int sequenceNumber);
        
        void search(const std::string &dssName, const std::map<std::string, std::string> &queryFields, std::vector<entity::SetDescriptor> &descriptorList);

    private:
        
        std::string dataDirectory;
        std::string confDirectory;
        std::map<std::string, entity::DataSetSpecifier> dssArray;                       
        std::map<std::string, std::vector<entity::DataSet> > dataSetCollection;         
        std::map<std::string, int> dssSequenceNumbers;                                  
        bool parse(const std::string &conf);
        
        void addSetDescriptorField(const std::string &name, const std::string &type, entity::DataSetSpecifier &dss);
        
        void addDataItem(const std::string &name, const std::string &tag, const std::string &group, entity::DataSetSpecifier &dss);
        
        void createIndex(const std::string &path);
        
        void updateIndex(const std::string &path, const entity::DataSet &dataSet);
    
        void initFromIndex(const std::string &dssName);

        void fillDatSetCollection();
    };
    
    class ParseException : public std::runtime_error
    {
        public:
            ParseException(const std::string &msg) : std::runtime_error(msg) {}
    };
}

#endif