/// <summary>
/// Builds the RegEx that allows us to preParse a time span string.
/// </summary>
/// <returns>regular expression string</returns>
private static string BuildParseRegularExpression()
{
StringBuilder regExPattern = new StringBuilder();
regExPattern.Append("^");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"years",
GetResourceString("YearsUnit"),
GetResourceString("YearUnit"),
GetResourceString("YearsLongUnit"),
GetResourceString("YearLongUnit")));
regExPattern.Append("\\s*");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"months",
GetResourceString("MonthsUnit"),
GetResourceString("MonthUnit"),
GetResourceString("MonthsLongUnit"),
GetResourceString("MonthLongUnit")));
regExPattern.Append("\\s*");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"weeks",
GetResourceString("WeeksUnit"),
GetResourceString("WeekUnit"),
GetResourceString("WeeksLongUnit"),
GetResourceString("WeekLongUnit")));
regExPattern.Append("\\s*");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"days",
GetResourceString("DaysUnit"),
GetResourceString("DayUnit"),
GetResourceString("DaysLongUnit"),
GetResourceString("DayLongUnit")));
regExPattern.Append("\\s*");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"hours",
GetResourceString("HoursUnit"),
GetResourceString("HourUnit"),
GetResourceString("HoursLongUnit"),
GetResourceString("HourLongUnit")));
regExPattern.Append("\\s*");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"minutes",
GetResourceString("MinutesUnit"),
GetResourceString("MinuteUnit"),
GetResourceString("MinutesLongUnit"),
GetResourceString("MinuteLongUnit")));
regExPattern.Append("\\s*");
regExPattern.Append(TimeSpanInputBox.BuildUnitRegEx(
"seconds",
GetResourceString("SecondsUnit"),
GetResourceString("SecondUnit"),
GetResourceString("SecondsLongUnit"),
GetResourceString("SecondLongUnit")));
regExPattern.Append("$");
return(regExPattern.ToString());
}
/// <summary>
/// Implements the extra parsing logic to recognise truncated forms of long TimeSpanUnits
/// </summary>
/// <param name="value">Input string to preparse for truncated TSUs</param>
/// <param name="parsedValue">A string regularised to the long TimeSpanUnits version of the input string</param>
/// <returns>status of update</returns>
private static bool TryPreParseUnits(string value, out string parsedValue)
{
// NOT the same as the NhsTimeSpan version...
string parseExpression = TimeSpanInputBox.BuildParseRegularExpression();
Regex regEx = new Regex(parseExpression, RegexOptions.IgnoreCase);
Match wordMatch = regEx.Match(value);
string returnValue = "";
parsedValue = null;
long result;
if (wordMatch != null)
{
// now convert to full length versions for easier parsing by NhsTimeSpan...
if (wordMatch.Groups["years"] != null && string.IsNullOrEmpty(wordMatch.Groups["years"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["years"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("YearsLongUnit") + " ";
}
else
{
return(false);
}
}
if (wordMatch.Groups["months"] != null && string.IsNullOrEmpty(wordMatch.Groups["months"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["months"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("MonthsLongUnit") + " ";
}
else
{
return(false);
}
}
if (wordMatch.Groups["weeks"] != null && string.IsNullOrEmpty(wordMatch.Groups["weeks"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["weeks"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("WeeksLongUnit") + " ";
}
else
{
return(false);
}
}
if (wordMatch.Groups["days"] != null && string.IsNullOrEmpty(wordMatch.Groups["days"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["days"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("DaysLongUnit") + " ";
}
else
{
return(false);
}
}
if (wordMatch.Groups["hours"] != null && string.IsNullOrEmpty(wordMatch.Groups["hours"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["hours"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("HoursLongUnit") + " ";
}
else
{
return(false);
}
}
if (wordMatch.Groups["minutes"] != null && string.IsNullOrEmpty(wordMatch.Groups["minutes"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["minutes"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("MinutesLongUnit") + " ";
}
else
{
return(false);
}
}
if (wordMatch.Groups["seconds"] != null && string.IsNullOrEmpty(wordMatch.Groups["seconds"].Value) == false)
{
if (long.TryParse(wordMatch.Groups["seconds"].Value, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
returnValue += result + GetResourceString("SecondsLongUnit") + " ";
}
else
{
return(false);
}
}
}
if (returnValue != null && returnValue.Length > 0)
{
parsedValue = returnValue.TrimEnd();
return(true);
}
else
{
parsedValue = value;
return(true);
}
}