public TimeSpan ToTimeSpan(string pattern)
{
try
{
_isTagTimeFound = false;
pattern = pattern.ToUpper().Trim();
if (!pattern.StartsWith(Constants.TAG_PERIOD))
{
throw new Iso8601DurationException(EXCEPTION_PATTERN_SHOULD_START_BY_P);
}
pattern = pattern.Substring(1);
if (pattern.Length == 0)
{
return(new TimeSpan(0));
}
_isMonthBeforeTime = pattern.IsMonthBeforeTime();
if (pattern.Length > 0 &&
pattern.StartsWith(Constants.TAG_TIME))
{
_isTagTimeFound = true;
pattern = pattern.Substring(1);
}
var durationStruct = new DurationStruct();
if (!_isTagTimeFound)
{
durationStruct.Years = GetValue(Constants.TAG_YEARS, ref pattern);
if (_isMonthBeforeTime)
{
durationStruct.Months = GetValue(Constants.TAG_MONTHS, ref pattern);
}
durationStruct.Days = GetValue(Constants.TAG_DAYS, ref pattern);
}
durationStruct.Hours = GetValue(Constants.TAG_HOURS, ref pattern);
durationStruct.Minutes = GetValue(Constants.TAG_MINUTES, ref pattern);
durationStruct.Seconds = GetValue(Constants.TAG_SECONDS, ref pattern);
return(ToTimeSpan(durationStruct));
}
catch (Exception ex)
{
throw new Iso8601DurationException(EXCEPTION_GENERIC_ERROR, ex);
}
}
private string GetPatternFromDurationStruct(DurationStruct durationStruct)
{
string pattern = Constants.TAG_PERIOD;
if (durationStruct.Seconds > Constants.SECONDS_PER_MINUTE)
{
int seconds = durationStruct.Seconds / Constants.SECONDS_PER_MINUTE;
durationStruct.Minutes += seconds;
durationStruct.Seconds -= seconds * Constants.SECONDS_PER_MINUTE;
}
if (durationStruct.Minutes > Constants.MINUTES_PER_HOUR)
{
int minutes = durationStruct.Minutes / Constants.MINUTES_PER_HOUR;
durationStruct.Hours += minutes;
durationStruct.Minutes -= minutes * Constants.MINUTES_PER_HOUR;
}
if (durationStruct.Hours > Constants.HOURS_PER_DAY)
{
int days = durationStruct.Hours / Constants.HOURS_PER_DAY;
durationStruct.Days += days;
durationStruct.Hours -= days * Constants.HOURS_PER_DAY;
}
if (durationStruct.Minutes > Constants.MINUTES_PER_HOUR)
{
int hours = durationStruct.Minutes / Constants.MINUTES_PER_HOUR;
durationStruct.Hours += hours;
durationStruct.Minutes -= hours * Constants.MINUTES_PER_HOUR;
}
if (durationStruct.Days > Constants.DAYS_PER_MONTH)
{
int years = durationStruct.Days / Constants.DAYS_PER_YEAR;
int days = durationStruct.Days - (years * Constants.DAYS_PER_YEAR);
int months = (days / Constants.DAYS_PER_MONTH);
durationStruct.Years += years;
durationStruct.Months += months;
durationStruct.Days -= (years * Constants.DAYS_PER_YEAR) + (months * Constants.DAYS_PER_MONTH);
}
if (durationStruct.Months >= Constants.MONTHS_PER_YEAR)
{
int years = durationStruct.Months / Constants.MONTHS_PER_YEAR;
int months = durationStruct.Months - (years * Constants.MONTHS_PER_YEAR);
durationStruct.Years += years;
durationStruct.Months = months;
}
pattern += (durationStruct.Years > 0 ? durationStruct.Years + Constants.TAG_YEARS : String.Empty);
pattern += (durationStruct.Months > 0 ? durationStruct.Months + Constants.TAG_MONTHS : String.Empty);
pattern += (durationStruct.Days > 0 ? durationStruct.Days + Constants.TAG_DAYS : String.Empty);
var patternTime = String.Empty;
patternTime += (durationStruct.Hours > 0 ? durationStruct.Hours + Constants.TAG_HOURS : String.Empty);
patternTime += (durationStruct.Minutes > 0 ? durationStruct.Minutes + Constants.TAG_MINUTES : String.Empty);
patternTime += (durationStruct.Seconds > 0 ? durationStruct.Seconds + Constants.TAG_SECONDS : String.Empty);
if (!String.IsNullOrEmpty(patternTime))
{
pattern += Constants.TAG_TIME + patternTime;
}
return(pattern);
}
public TimeSpan ToTimeSpan(DurationStruct durationStruct)
{
durationStruct.Days = CalculateDays(durationStruct.Years, durationStruct.Months, durationStruct.Days);
return(new TimeSpan(durationStruct.Days, durationStruct.Hours, durationStruct.Minutes, durationStruct.Seconds));
}
public string ToString(DurationStruct durationStruct)
{
return(NormalizeDuration(GetPatternFromDurationStruct(durationStruct)));
}
