/// <summary>
/// Decodes a version value and writes the time to the console.
/// </summary>
/// <param name="scheme">The version scheme specification of the version value.</param>
/// <param name="value">The version value to decode.</param>
public static void ShowDecode(string scheme, string value)
{
SchemeData data = ParseTimeScheme(scheme);
DateTime time = DateTime.MinValue;
switch (data.SchemeType)
{
case SchemeType.Readable:
time = DateTime.ParseExact(value, data.TimeFormat, CultureInfo.InvariantCulture).ToUniversalTime();
break;
case SchemeType.DottedDecimal:
time = DecodeDecimal(value, data.IntervalSeconds, data.BaseYear);
break;
case SchemeType.BaseEncoded:
time = DecodeBase(value, data.Alphabet, data.IntervalSeconds, data.BaseYear);
break;
case SchemeType.Hours:
time = DecodeHours(value, data.BaseYear, data.BaseMonth);
break;
}
if (time == DateTime.MinValue)
{
throw new FormatException("Invalid revision ID value: " + value);
}
Console.WriteLine(time.ToString("yyyy-MM-dd HH:mm:ss") + " UTC");
Console.WriteLine(time.ToLocalTime().ToString("yyyy-MM-dd HH:mm:ss K"));
}
/// <summary>
/// Formats the current data for the specified time scheme.
/// </summary>
/// <param name="match"></param>
/// <returns></returns>
private string FormatTimeScheme(Match match)
{
string scheme = match.Value;
SchemeData data = ParseTimeScheme(scheme);
DateTimeOffset time;
if (data.TimeSource == TimeSource.Build)
{
time = BuildTime;
}
else if (data.TimeSource == TimeSource.Author)
{
time = RevisionData.AuthorTime;
}
else
{
time = RevisionData.CommitTime;
}
switch (data.SchemeType)
{
case SchemeType.Readable:
if (data.Utc)
{
time = time.UtcDateTime;
}
return(time.ToString(data.TimeFormat, CultureInfo.InvariantCulture));
case SchemeType.DottedDecimal:
return(EncodeDecimal(time, data.IntervalSeconds, data.BaseYear));
case SchemeType.BaseEncoded:
return(EncodeBase(time, data.Alphabet, data.IntervalSeconds, data.BaseYear, data.MinLength, data.UpperCase));
case SchemeType.Hours:
return(EncodeHours(time, data.BaseYear, data.BaseMonth));
}
// Return match unprocessed (should not happen)
return(scheme);
}
/// <summary>
/// Parses a time-based version scheme specification.
/// </summary>
/// <param name="scheme">The version scheme specification to parse.</param>
/// <returns>The parsed scheme data.</returns>
private static SchemeData ParseTimeScheme(string scheme)
{
var data = new SchemeData();
Match match;
string sourceStr = null;
string timeComponents = null;
string timeSeparator = null;
int numberBase = 0;
int intervalValue = 0;
string intervalType = null;
// Split scheme string
if ((match = Regex.Match(scheme, @"^\{?([abc]):(u?)(ymd|hms|hm|h)([-.:]?)\}?$")).Success)
{
data.SchemeType = SchemeType.Readable;
sourceStr = match.Groups[1].Value;
data.Utc = match.Groups[2].Value == "u";
timeComponents = match.Groups[3].Value;
timeSeparator = match.Groups[4].Value;
}
else if ((match = Regex.Match(scheme, @"^\{?([abc]):([0-9]+)([smhd]):([0-9]+)\}?$")).Success)
{
data.SchemeType = SchemeType.DottedDecimal;
sourceStr = match.Groups[1].Value;
intervalValue = int.Parse(match.Groups[2].Value);
intervalType = match.Groups[3].Value;
data.BaseYear = int.Parse(match.Groups[4].Value);
}
else if ((match = Regex.Match(scheme, @"^\{?([AaBbCc]):([0-9]+):([0-9]+)([smhd]):([0-9]+)(?::([0-9]+))?\}?$")).Success)
{
data.SchemeType = SchemeType.BaseEncoded;
sourceStr = match.Groups[1].Value.ToLowerInvariant();
data.UpperCase = char.IsUpper(match.Groups[1].Value[0]);
numberBase = int.Parse(match.Groups[2].Value);
intervalValue = int.Parse(match.Groups[3].Value);
intervalType = match.Groups[4].Value;
data.BaseYear = int.Parse(match.Groups[5].Value);
if (match.Groups[6].Success)
{
data.MinLength = int.Parse(match.Groups[6].Value);
}
}
else if ((match = Regex.Match(scheme, @"^\{?([abc]):h:([0-9]{4})-([0-9]{2})\}?$")).Success)
{
data.SchemeType = SchemeType.Hours;
sourceStr = match.Groups[1].Value;
data.BaseYear = int.Parse(match.Groups[2].Value);
data.BaseMonth = int.Parse(match.Groups[3].Value);
data.IntervalSeconds = 3600;
}
#region Legacy formats
else if ((match = Regex.Match(scheme, @"^\{?([Xx])min:([0-9]+)(?::([0-9]+))?\}?$")).Success)
{
data.SchemeType = SchemeType.BaseEncoded;
sourceStr = "c";
data.UpperCase = match.Groups[1].Value == "X";
numberBase = 16;
intervalValue = 1;
intervalType = "m";
data.BaseYear = int.Parse(match.Groups[2].Value);
if (match.Groups[3].Success)
{
data.MinLength = int.Parse(match.Groups[3].Value);
}
}
else if ((match = Regex.Match(scheme, @"^\{?([Bb])(36)?min:([0-9]+)(?::([0-9]+))?\}?$")).Success)
{
data.SchemeType = SchemeType.BaseEncoded;
sourceStr = "c";
data.UpperCase = match.Groups[1].Value == "B";
numberBase = match.Groups[2].Success ? 36 : 28;
intervalValue = match.Groups[2].Success ? 10 : 20;
intervalType = "m";
data.BaseYear = int.Parse(match.Groups[3].Value);
if (match.Groups[4].Success)
{
data.MinLength = int.Parse(match.Groups[4].Value);
}
}
else if ((match = Regex.Match(scheme, @"^\{?d(2)?min:([0-9]+)\}?$")).Success)
{
data.SchemeType = SchemeType.DottedDecimal;
sourceStr = "c";
intervalValue = match.Groups[1].Success ? 2 : 15;
intervalType = "m";
data.BaseYear = int.Parse(match.Groups[2].Value);
}
#endregion Legacy formats
else
{
throw new FormatException("Invalid time scheme: " + scheme);
}
// Select time source
switch (sourceStr)
{
case "a": data.TimeSource = TimeSource.Author; break;
case "b": data.TimeSource = TimeSource.Build; break;
case "c": data.TimeSource = TimeSource.Commit; break;
default:
throw new FormatException("Invalid time source specification: " + sourceStr);
}
if (data.SchemeType == SchemeType.Readable)
{
// Select time format from components and separator
switch (timeComponents + timeSeparator)
{
case "ymd":
data.TimeFormat = "yyyyMMdd";
break;
case "ymd-":
data.TimeFormat = "yyyy-MM-dd";
break;
case "ymd.":
data.TimeFormat = "yyyy.MM.dd";
break;
case "hms":
data.TimeFormat = "HHmmss";
break;
case "hms-":
data.TimeFormat = "HH-mm-ss";
break;
case "hms.":
data.TimeFormat = "HH.mm.ss";
break;
case "hms:":
data.TimeFormat = "HH:mm:ss";
break;
case "hm":
data.TimeFormat = "HHmm";
break;
case "hm-":
data.TimeFormat = "HH-mm";
break;
case "hm.":
data.TimeFormat = "HH.mm";
break;
case "hm:":
data.TimeFormat = "HH:mm";
break;
case "h":
data.TimeFormat = "HH";
break;
default:
throw new FormatException("Invalid time components and separator: " + timeComponents + timeSeparator);
}
}
if (data.SchemeType == SchemeType.DottedDecimal ||
data.SchemeType == SchemeType.BaseEncoded)
{
// Convert interval specification to seconds
data.IntervalSeconds = intervalValue;
switch (intervalType)
{
case "s": break;
case "m": data.IntervalSeconds *= 60; break;
case "h": data.IntervalSeconds *= 60 * 60; break;
case "d": data.IntervalSeconds *= 24 * 60 * 60; break;
}
}
if (data.SchemeType == SchemeType.BaseEncoded)
{
// Select alphabet for number base
if (numberBase < 2 || numberBase > 36)
{
throw new FormatException("Invalid number base: " + numberBase);
}
else if (numberBase == 28)
{
data.Alphabet = base28Alphabet;
}
else
{
data.Alphabet = new char[numberBase];
Array.Copy(base36Alphabet, data.Alphabet, numberBase);
}
}
return(data);
}
