String DateTime::ToFormat(const String& format) const
{
String s = format.IsEmpty() ? "M/D/YYYY" : format;
TimeSpan t = *this;
String ampm = "am";
if (s.Contains("am/pm") || s.Contains("AM/PM"))
{
s = s.Replace("am/pm", "{4}");
s = s.Replace("AM/PM", "{5}");
if (t.Hours() >= 12)
{
t = t.AddHours(-12);
ampm = "pm";
}
else if (t.Hours() == 0)
t = t.AddHours(12);
}
String AMPM = ampm.ToUpper();
YearString y(*this);
MonthString m(*this);
DayString d(*this);
s = s
.Replace("YYYY", "{0:~~~~}")
.Replace("YY", "{0:~~}")
.Replace("MMMM", "{1:~~~~}")
.Replace("MMM", "{1:~~~}")
.Replace("MM", "{1:~~}")
.Replace("M", "{1}")
.Replace("DDDD", "{2:~~~~}")
.Replace("DDD", "{2:~~~}")
.Replace("DD", "{2:~~}")
.Replace("D", "{2}")
.Replace("hh", "{3:HH}")
.Replace("h", "{3:H}")
.Replace("mm", "{3:MM}")
.Replace("m", "{3:M}")
.Replace("ss", "{3:SS}")
.Replace("s", "{3:S}")
.Replace("nnn", "{3:NNN}")
.Replace("nn", "{3:NN}")
.Replace("n", "{3:N}")
.Replace("{3:HH}", "{3:hh}")
.Replace("{3:H}", "{3:h}")
.Replace("{3:MM}", "{3:mm}")
.Replace("{3:M}", "{3:m}")
.Replace("{3:SS}", "{3:ss}")
.Replace("{3:S}", "{3:s}")
.Replace("{3:NNN}", "{3:nnn}")
.Replace("{3:NN}", "{3:nn}")
.Replace("{3:N}", "{3:n}");
if (s.Contains("{4}"))
s = s.Replace("{4}", ampm);
if (s.Contains("{5}"))
s = s.Replace("{5}", AMPM);
return Format(s, y, m, d, t);
}
CString DateTime::FormatISO8601(T_enISO8601Format enFormat, bool bBasic, const TimeZone& tz) const throw()
{
CString cszDate;
switch(enFormat)
{
case formatY: return Format(_T("%Y"), tz);
case formatYM: return Format(bBasic ? _T("%Y%m") : _T("%Y-%m"), tz);
case formatYMD: return Format(bBasic ? _T("%Y%m%d") : _T("%Y-%m-%d"), tz);
case formatYMD_HM_Z:
cszDate = Format(bBasic ? _T("%Y%m%dT%H%M") : _T("%Y-%m-%dT%H:%M"), tz);
break;
case formatYMD_HMS_Z:
cszDate = Format(bBasic ? _T("%Y%m%dT%H%M%S") : _T("%Y-%m-%dT%H:%M:%S"), tz);
break;
case formatYMD_HMSF_Z:
{
cszDate = Format(bBasic ? _T("%Y%m%dT%H%M%S") : _T("%Y-%m-%dT%H:%M:%S"), tz);
CString cszFraction;
cszFraction.Format(_T(".%03u"), Millisecond());
cszDate += cszFraction;
}
break;
}
// add timezone
if (tz.StandardName() == _T("UTC"))
cszDate += _T("Z");
else
{
TimeSpan spTimezone = tz.GetUtcOffset(*this);
bool bNegative = spTimezone < TimeSpan(0, 0, 0, 0);
TimeSpan spTimezoneAbs = bNegative ? -spTimezone : spTimezone;
CString cszTimezone;
cszTimezone.Format(bBasic ? _T("%c%02u%02u") : _T("%c%02u:%02u"),
!bNegative ? _T('+') : _T('-'),
spTimezoneAbs.Hours(),
spTimezoneAbs.Minutes());
cszDate += cszTimezone;
}
return cszDate;
}
