Date.hpp

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/*---------------------------------------------------------------------\
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|                    |____||_| |_| |_|/ /    \ \|____|                 |
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|                             core library                             |
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|                                         (C) SUSE Linux Products GmbH |
\----------------------------------------------------------------------/

  File:       Date.hpp

  Author:     Michael Andres

/-*/
#ifndef CA_MGM_DATE_HPP
#define CA_MGM_DATE_HPP

#include <ctime>
#include <iosfwd>
#include <string>

#include <ca-mgm/Exception.hpp>

namespace ca_mgm
{ 

  //
  //    CLASS NAME : Date
  //
  class Date
  {
    friend std::ostream & operator<<( std::ostream & str, const Date & obj );

  public:

    typedef time_t ValueType;

    Date()
    : _date( 0 )
    {}
    Date( ValueType date_r )
    : _date( date_r )
    {}
    Date( const std::string & seconds_r );

    Date( const std::string & date_str, const std::string & format, bool utc = false);

    static Date now()
    { return ::time( 0 ); }

  public:
    operator ValueType() const
    { return _date; }

    Date & operator+=( const time_t rhs ) { _date += rhs; return *this; }
    Date & operator-=( const time_t rhs ) { _date -= rhs; return *this; }
    Date & operator*=( const time_t rhs ) { _date *= rhs; return *this; }
    Date & operator/=( const time_t rhs ) { _date /= rhs; return *this; }

    Date & operator++(/*prefix*/) { _date += 1; return *this; }
    Date & operator--(/*prefix*/) { _date -= 1; return *this; }

    Date operator++(int/*postfix*/) { return _date++; }
    Date operator--(int/*postfix*/) { return _date--; }

  public:
    std::string form( const std::string & format_r, bool utc = false ) const;

    std::string asString() const
    { return form( "%c" ); }

    std::string asSeconds() const
    { return form( "%s" ); }

  private:
    ValueType _date;
  };

  inline std::ostream & operator<<( std::ostream & str, const Date & obj )
  { return str << obj.asString(); }

} // namespace ca_mgm
#endif // CA_MGM_DATE_HPP