timezone.h

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#ifndef CPPCOMMON_TIME_TIMEZONE_H
#define CPPCOMMON_TIME_TIMEZONE_H
 
#include "time/time.h"
 
#include <string>
 
namespace CppCommon {
 
 
class Timezone
{
public:
    Timezone();
 
    explicit Timezone(const std::string& name, const Timespan& offset, const Timespan& dstoffset = Timespan::zero())
        : _name(name), _offset(offset), _dstoffset(dstoffset)
    {}
    Timezone(const Timezone&) = default;
    Timezone(Timezone&&) = default;
    ~Timezone() = default;
 
    Timezone& operator=(const Timezone&) = default;
    Timezone& operator=(Timezone&&) = default;
 
    // Timezone comparison
    friend bool operator==(const Timezone& timezone1, const Timezone& timezone2) noexcept
    { return timezone1.total() == timezone2.total(); }
    friend bool operator!=(const Timezone& timezone1, const Timezone& timezone2) noexcept
    { return timezone1.total() != timezone2.total(); }
    friend bool operator>(const Timezone& timezone1, const Timezone& timezone2) noexcept
    { return timezone1.total() > timezone2.total(); }
    friend bool operator<(const Timezone& timezone1, const Timezone& timezone2) noexcept
    { return timezone1.total() < timezone2.total(); }
    friend bool operator>=(const Timezone& timezone1, const Timezone& timezone2) noexcept
    { return timezone1.total() >= timezone2.total(); }
    friend bool operator<=(const Timezone& timezone1, const Timezone& timezone2) noexcept
    { return timezone1.total() <= timezone2.total(); }
 
    const std::string& name() const noexcept { return _name; }
    const Timespan& offset() const noexcept { return _offset; }
    const Timespan& daylight() const noexcept { return _dstoffset; }
 
    Timespan total() const noexcept { return _offset + _dstoffset; }
 
 
    LocalTime Convert(const UtcTime& utctime) const
    { return LocalTime(utctime + total()); }
 
    UtcTime Convert(const LocalTime& localtime) const
    { return UtcTime(localtime - total()); }
 
 
    static Timezone utc()
    { return Timezone("GMT", Timespan::zero()); }
 
 
    static Timezone local()
    { return Timezone(); }
 
    void swap(Timezone& timezone) noexcept;
    friend void swap(Timezone& timezone1, Timezone& timezone2) noexcept;
 
protected:
    std::string _name;
    Timespan _offset;
    Timespan _dstoffset;
};
 
} // namespace CppCommon
 
#include "timezone.inl"
 
#endif // CPPCOMMON_TIME_TIMEZONE_H