metadata_input.h

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#ifndef METADATA_INPUT_H_INCLUDED
#define METADATA_INPUT_H_INCLUDED

#include "metadata.h"
#include <unordered_map>
#include <vector>
#include <string>
#include <unordered_map>
#include <boost/asio.hpp>

class MetadataReader;

class MetadataInput{
public:
    /*
     * @brief constructor for MetadataInput
     */
    MetadataInput();

    ~MetadataInput();

    Metadata get_metadata(double timestamp);

    Metadata next_metadata();

    void add_source(MetadataReader *reader);

    int num_sources();

    int check_data_order();
private:

    Metadata metadata_at_index(int index, double timestamp);

    /*
     * @brief helper for running binary search on the log
     *
     * @param value value to be queried
     * @param begin min position in the log to search
     * @param end max position in the log to search
     * @param field column of the log to query
     * @return result of the query
     */
    Metadata bisearcher(double value, int begin, int end, std::string field);

    void push_back(std::unordered_map<std::string, std::string> newEntry);

    int cameraStatus=0;

    int size;

    std::vector<std::string> heads;

    std::unordered_map<std::string, std::vector<std::string> > data;

    std::vector<long> time;

    std::vector<MetadataReader *> sources;

    friend class MetadataReader;
};

#endif // METADATA_INPUT_H_INCLUDED