/// <summary>
/// Converts a vague date composed of separate start and end date strings into a timespan in days since 30/12/1899.
/// </summary>
/// <param name="startDateString">Start date string.</param>
/// <param name="endDateString">End date string.</param>
/// <param name="dateType">Two-letter date format code as generated by the GetFormat method.</param>
/// <param name="outputFormat">One of the output formats in the HLU.Date.DateType enumeration.</param>
/// <returns></returns>
public static int ToTimeSpanDays(string startDateString, string endDateString,
string dateType, DateType outputFormat)
{
if (String.IsNullOrEmpty(dateType) || (dateType == VagueDate.ToCode(VagueDateTypes.Unknown)))
{
return(DateUnknown);
}
try
{
DateTimeFormatInfo dtFormatInfo = CultureInfo.CurrentCulture.DateTimeFormat;
DateTime startDate;
bool startDateOk = DateTime.TryParse(startDateString, dtFormatInfo,
DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AssumeLocal |
DateTimeStyles.NoCurrentDateDefault, out startDate);
DateTime endDate;
bool endDateOk = DateTime.TryParse(endDateString, dtFormatInfo,
DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AssumeLocal |
DateTimeStyles.NoCurrentDateDefault, out endDate);
int year;
string formatString = String.Empty;
switch (outputFormat)
{
case DateType.Start:
if (dateType.Length > 0)
{
formatString = dateType.Substring(0, 1);
}
switch (VagueDate.FromCode(formatString))
{
case VagueDateTypes.StartDate: // "D"
if (startDateOk)
{
return(startDate.Subtract(BaseDate).Days);
}
break;
case VagueDateTypes.StartMonthAndYear: // "O"
if (startDateOk)
{
return(startDate.Subtract(BaseDate).Days);
}
break;
case VagueDateTypes.Year: // "Y"
if (startDateOk)
{
return(new DateTime(startDate.Year, 1, 1).Subtract(BaseDate).Days);
}
else if (Int32.TryParse(startDateString, out year))
{
return(new DateTime(year, 1, 1).Subtract(BaseDate).Days);
}
break;
case VagueDateTypes.Season: // "P"
if (!String.IsNullOrEmpty(startDateString))
{
string[] splitArray = Regex.Split(startDateString, @"\s+");
if ((splitArray.Length != 2) || !Int32.TryParse(splitArray[1], out year))
{
return(DateUnknown); // 9999;
}
var q = SeasonNames.Where(s => s.ToLower() == splitArray[0].ToLower());
if (q.Count() > 0)
{
string season = q.ElementAt(0);
int seasonIx = System.Array.IndexOf(SeasonNames, season);
if (seasonIx != -1)
{
return(SeasonStart(splitArray[0], year).Subtract(BaseDate).Days);
}
}
}
break;
case VagueDateTypes.Unknown: // "U"
default:
return(DateUnknown);
}
break;
case DateType.End:
if (dateType.Length > 1)
{
formatString = dateType.Substring(dateType.Length - 1, 1);
}
switch (VagueDate.FromCode(formatString))
{
case VagueDateTypes.StartDate: // "D"
if (endDateOk)
{
return(endDate.Subtract(BaseDate).Days);
}
break;
case VagueDateTypes.StartMonthAndYear: // "O"
if (endDateOk)
{
return(endDate.Subtract(BaseDate).Days);
}
break;
case VagueDateTypes.Year: // "Y"
if (endDateOk)
{
return(new DateTime(endDate.Year, 1, 1).Subtract(BaseDate).Days);
}
else if (Int32.TryParse(endDateString, out year))
{
return(new DateTime(year, 1, 1).Subtract(BaseDate).Days);
}
break;
case VagueDateTypes.Season: // "P"
if (!String.IsNullOrEmpty(endDateString))
{
string[] splitArray = Regex.Split(endDateString, @"\s+");
if ((splitArray.Length != 2) || !Int32.TryParse(splitArray[1], out year))
{
return(DateUnknown); // 9999;
}
var q = SeasonNames.Where(s => s.ToLower() == splitArray[0].ToLower());
if (q.Count() > 0)
{
string season = q.ElementAt(0);
int seasonIx = System.Array.IndexOf(SeasonNames, season);
return(SeasonEnd(season, year).Subtract(BaseDate).Days);
}
}
break;
case VagueDateTypes.Unknown: // "U"
default:
return(DateUnknown);
}
break;
}
}
catch { }
return(DateUnknown); // 9999
}
/// <summary>
/// Creates a vague date string of a specified format from start and end dates.
/// </summary>
/// <param name="startDate">Start date.</param>
/// <param name="endDate">End date.</param>
/// <param name="dateType">Two-letter date format code as generated by the GetFormat method.</param>
/// <param name="outputFormat">One of the output formats in the HLU.Date.DateType enumeration.</param>
/// <returns>A vague date string in the format specified in the dateType parameter.</returns>
public static string FromDate(DateTime startDate, DateTime endDate,
string dateType, DateType outputFormat)
{
if (String.IsNullOrEmpty(dateType) || (dateType == VagueDate.ToCode(VagueDateTypes.Unknown)))
{
return(VagueDateTypes.Unknown.ToString());
}
try
{
DateTimeFormatInfo dtFormatInfo = CultureInfo.CurrentCulture.DateTimeFormat;
string formatString = String.Empty;
switch (outputFormat)
{
case DateType.Start:
if (dateType.Length > 0)
{
formatString = dateType.Substring(0, 1);
}
switch (VagueDate.FromCode(formatString))
{
case VagueDateTypes.StartDate: // "D"
return(startDate.ToShortDateString());
case VagueDateTypes.StartMonthAndYear: // "O"
return(String.Format("{0} {1}", dtFormatInfo.MonthNames[startDate.Month - 1], startDate.Year));
case VagueDateTypes.Year: // "Y"
return(startDate.Year.ToString());
case VagueDateTypes.Season: // "P"
return(String.Format("{0}{1}", SeasonString(startDate), Delimiter));
case VagueDateTypes.Unknown: // "U"
return(VagueDateTypes.Unknown.ToString());
}
break;
case DateType.End:
if (dateType.Length > 1)
{
formatString = dateType.Substring(dateType.Length - 1, 1);
}
switch (VagueDate.FromCode(formatString))
{
case VagueDateTypes.StartDate: // "D"
return(endDate.ToShortDateString());
case VagueDateTypes.StartMonthAndYear: // "O"
return(String.Format("{0} {1}", dtFormatInfo.MonthNames[endDate.Month - 1], endDate.Year));
case VagueDateTypes.Year: // "Y"
return(endDate.Year.ToString());
case VagueDateTypes.Season: // "P"
return(String.Format("{0}{1}", Delimiter, SeasonString(endDate)));
case VagueDateTypes.Unknown: // "U"
return(VagueDateTypes.Unknown.ToString());
}
break;
case DateType.Vague:
if (dateType.Length > 0)
{
formatString = dateType.Substring(0, 1);
}
StringBuilder returnString = new StringBuilder();
switch (VagueDate.FromCode(formatString))
{
case VagueDateTypes.StartDate: // "D"
returnString.Append(startDate.ToShortDateString());
break;
case VagueDateTypes.StartMonthAndYear: // "O"
returnString.Append(String.Format("{0} {1}",
dtFormatInfo.MonthNames[startDate.Month - 1], startDate.Year));
break;
case VagueDateTypes.Year: // "Y"
returnString.Append(startDate.Year.ToString());
break;
case VagueDateTypes.Season: // "P"
returnString.Append(SeasonString(startDate));
break;
case VagueDateTypes.Unknown: // "U"
break;
}
if ((endDate == startDate) || (dateType.Length < 2))
{
return(returnString.ToString());
}
formatString = dateType.Substring(dateType.Length - 1, 1);
switch (VagueDate.FromCode(formatString))
{
case VagueDateTypes.StartDate: // "D"
return(returnString.Append(Delimiter).Append(endDate.ToShortDateString()).ToString());
case VagueDateTypes.StartMonthAndYear: // "O"
return(returnString.Append(Delimiter).Append(String.Format("{0} {1}",
dtFormatInfo.MonthNames[endDate.Month - 1], endDate.Year)).ToString());
case VagueDateTypes.Year: // "Y"
return(returnString.Append(Delimiter).Append(endDate.Year).ToString());
case VagueDateTypes.Season: // "P"
return(returnString.Append(Delimiter).Append(SeasonString(endDate)).ToString());
case VagueDateTypes.Unknown: // "U"
if (returnString.Length == 0)
{
return(VagueDateTypes.Unknown.ToString());
}
else
{
return(returnString.Append(Delimiter).ToString());
}
}
break;
}
}
catch { }
return(VagueDateTypes.Unknown.ToString());
}
