matcher.h

#ifndef DBALLE_CORE_MATCHER_H
#define DBALLE_CORE_MATCHER_H

#include <dballe/core/fwd.h>
#include <dballe/types.h>
#include <memory>

namespace dballe {
namespace matcher {

enum Result {
    MATCH_YES, // Item matches
    MATCH_NO,  // Item does not match
    MATCH_NA   // Match not applicable to this item
};

std::string result_format(Result res);

} // namespace matcher

struct Matched
{
    virtual ~Matched() {}

    virtual matcher::Result match_var_id(int val) const;

    virtual matcher::Result match_station_id(int val) const;

    virtual matcher::Result match_station_wmo(int block,
                                              int station = -1) const;

    virtual matcher::Result match_datetime(const DatetimeRange& range) const;

    virtual matcher::Result match_coords(const LatRange& latrange,
                                         const LonRange& lonrange) const;

    virtual matcher::Result match_rep_memo(const char* memo) const;

    static matcher::Result int_in_range(int val, int min, int max);

    static matcher::Result lon_in_range(int val, int min, int max);
};

struct Matcher
{
    virtual ~Matcher() {}

    virtual matcher::Result match(const Matched& item) const = 0;
    virtual void to_query(dballe::core::Query& query) const  = 0;

    static std::unique_ptr<Matcher> create(const dballe::Query& query);
};

} // namespace dballe

#endif