localehelper.h

Go to the documentation of this file.

#ifndef TAG_PARSER_LANGUAGE_H
#define TAG_PARSER_LANGUAGE_H
 
#include "./global.h"
 
#include <cstdint>
#include <string>
#include <utility>
#include <vector>
 
namespace TagParser {

enum class LocaleFormat : std::uint64_t {
    Unknown, 
    DomainCountry, 
    ISO_639_1, 
    ISO_639_2_T, 
    ISO_639_2_B, 
    BCP_47, 
};

struct TAG_PARSER_EXPORT LocaleDetail : public std::string {
    explicit LocaleDetail();
    explicit LocaleDetail(std::string_view value, LocaleFormat format);
    explicit LocaleDetail(std::string &&value, LocaleFormat format);
    LocaleFormat format = LocaleFormat::Unknown;
    static const LocaleDetail &getEmpty();
};

inline LocaleDetail::LocaleDetail()
    : format(LocaleFormat::Unknown)
{
}

inline LocaleDetail::LocaleDetail(std::string_view value, LocaleFormat format)
    : std::string(value)
    , format(format)
{
}

inline LocaleDetail::LocaleDetail(std::string &&value, LocaleFormat format)
    : std::string(std::move(value))
    , format(format)
{
}

struct TAG_PARSER_EXPORT Locale : public std::vector<LocaleDetail> {
    explicit Locale() = default;
    explicit Locale(std::initializer_list<LocaleDetail> details);
    explicit Locale(std::string &&value, LocaleFormat format);
    explicit Locale(std::string_view value, LocaleFormat format);
    const LocaleDetail &abbreviatedName(LocaleFormat format) const;
    template <typename LocaleFormat, typename... LocaleFormats>
    const LocaleDetail &abbreviatedName(LocaleFormat format, LocaleFormats... moreFormats) const;
    const LocaleDetail &someAbbreviatedName(LocaleFormat preferredFormat = LocaleFormat::BCP_47) const;
    const std::string &fullName() const;
    const std::string &fullOrSomeAbbreviatedName() const;
    std::string toString() const;
};

template <typename LocaleFormat, typename... LocaleFormats>
inline const LocaleDetail &Locale::abbreviatedName(LocaleFormat format, LocaleFormats... moreFormats) const
{
    if (const auto &detail = abbreviatedName(format); !detail.empty()) {
        return detail;
    } else {
        return abbreviatedName(moreFormats...);
    }
}

inline Locale::Locale(std::initializer_list<LocaleDetail> details)
    : std::vector<LocaleDetail>(details)
{
}

inline Locale::Locale(std::string &&value, LocaleFormat format)
    : std::vector<LocaleDetail>()
{
    emplace_back(std::move(value), format);
}

inline Locale::Locale(std::string_view value, LocaleFormat format)
    : std::vector<LocaleDetail>()
{
    emplace_back(value, format);
}
 
} // namespace TagParser
 
#endif // TAG_PARSER_LANGUAGE_H