/// <summary>
/// Decrease the time and date of a <see cref="EorzeaDateTime" /> by a <see cref="TimeSpan" />.
/// </summary>
/// <param name="lh"><see cref="EorzeaDateTime" /> to use as base.</param>
/// <param name="rh"><see cref="TimeSpan" /> to subtract to the <see cref="EorzeaDateTime" />.</param>
/// <returns>Returns a new <see cref="EorzeaDateTime" /> object with the resulting time and date.</returns>
public static EorzeaDateTime operator-(EorzeaDateTime lh, TimeSpan rh)
{
EorzeaDateTime copy = lh.Clone();
copy.Minute -= (int)rh.TotalMinutes;
return(copy);
}
/// <summary>
/// Initializes a new instance of the <see cref="EorzeaDateTime" /> class that represents the same time and date as
/// another <see cref="EorzeaDateTime" />.
/// </summary>
/// <param name="source"><see cref="EorzeaDateTime" /> whose values to copy.</param>
public EorzeaDateTime(EorzeaDateTime source)
{
Minute = source.Minute;
Bell = source.Bell;
Sun = source.Sun;
Moon = source.Moon;
Year = source.Year;
}
/// <summary>
/// Initializes a new instance of the <see cref="EorzeaDateTime" /> class that represents the same time and date as
/// another <see cref="EorzeaDateTime" />.
/// </summary>
/// <param name="source"><see cref="EorzeaDateTime" /> whose values to copy.</param>
public EorzeaDateTime(EorzeaDateTime source)
{
Minute = source.Minute;
Bell = source.Bell;
Sun = source.Sun;
Moon = source.Moon;
Year = source.Year;
}
/// <summary>
/// Append the format for a specifier to the output, if applicable.
/// </summary>
/// <param name="dateTime">The Source <see cref="EorzeaDateTime"/>.</param>
/// <param name="stringBuilder"><see cref="StringBuilder"/> to write to.</param>
/// <param name="specifier">Specifier to use for formatting, or \0 should nothing be appended. When this method returns this value will always be \0.</param>
/// <param name="count">Subsequent occurences of <c>specifier</c>.</param>
/// <param name="formatProvider">The provider to use to format the value.</param>
private static void TryFinishSequence(EorzeaDateTime dateTime, StringBuilder stringBuilder, ref char specifier, int count, IFormatProvider formatProvider)
{
if (specifier == '\0')
{
return;
}
stringBuilder.Append(KnownSpecifiers[specifier].FormatFunction(dateTime, count, formatProvider));
specifier = '\0';
}
/// <summary>
/// Formats the value of the current instance using the specified format and format provider..
/// </summary>
/// <param name="dateTime"><see cref="EorzeaDateTime"/> to format.</param>
/// <param name="format">Format string to use, or <c>null</c> to use the default format.</param>
/// <param name="formatProvider">The provider to use to format the value, or <c>null</c> if the current culture's provider should be used.</param>
/// <returns>The value of <c>dateTime</c> formatted as a string according to <c>format</c>.</returns>
public static string Format(EorzeaDateTime dateTime, string format, IFormatProvider formatProvider)
{
if (dateTime == null)
{
throw new ArgumentNullException("dateTime");
}
if (format == null)
{
format = DefaultFormat;
}
if (formatProvider == null)
{
formatProvider = System.Globalization.CultureInfo.CurrentCulture;
}
if (string.IsNullOrWhiteSpace(format))
{
throw new ArgumentException();
}
if (format.Length == 1)
{
char standardKey = format[0];
if (StandardFormats.ContainsKey(standardKey))
{
format = StandardFormats[standardKey];
}
}
StringBuilder sb = new StringBuilder();
char isInString = '\0';
char currentSpecifier = '\0';
int specifierCount = 0;
foreach (char c in format)
{
if (isInString != '\0')
{
if (c == isInString)
{
isInString = '\0';
}
else
{
sb.Append(c);
}
}
else
{
if (c == currentSpecifier)
{
++specifierCount;
}
else
{
TryFinishSequence(dateTime, sb, ref currentSpecifier, specifierCount, formatProvider);
if (StringSpecifiers.Contains(c))
{
isInString = c;
}
else if (KnownSpecifiers.ContainsKey(c))
{
currentSpecifier = c;
specifierCount = 1;
}
else
{
sb.Append(c);
}
}
if (currentSpecifier != '\0')
{
if (specifierCount == KnownSpecifiers[currentSpecifier].MaximumCount)
{
TryFinishSequence(dateTime, sb, ref currentSpecifier, specifierCount, formatProvider);
}
}
}
}
TryFinishSequence(dateTime, sb, ref currentSpecifier, specifierCount, formatProvider);
return(sb.ToString());
}
