/// <summary>
/// Creates a relative date expression with symbol scope, context, script refernce set.
/// The date expression can handle relative dates: 3rd monday of january
/// </summary>
/// <param name="daysAway">The number of days away.</param>
/// <param name="token"></param>
/// <returns></returns>
public static Expr Duration(string duration, string mode, TokenData token)
{
var exp = new DurationExpr();
exp.Duration = duration;
exp.Mode = mode;
SetupContext(exp, token);
return(exp);
}
/// <summary>
/// Executes the days away expresssion to get a date x days away.
/// </summary>
/// <param name="expr"></param>
/// <returns></returns>
public object VisitDuration(DurationExpr expr)
{
var name = expr.Duration;
var num = 0.0;
// Case 1: daysAhead days away
if (this.Ctx.Symbols.Contains(name))
{
var variable = this.Ctx.Memory.Get <object>(name) as LObject;
if (variable.Type != LTypes.Number)
{
throw new LangException("TypeError", "Days away must of type of number", expr.Ref.ScriptName, expr.Ref.Line, expr.Ref.CharPos);
}
num = ((LNumber)variable).Value;
}
// Case 2: 3 days away
else
{
num = Convert.ToInt32(name);
}
// Now convert to relative "days away".
TimeSpan duration = TimeSpan.MinValue;
var mode = expr.Mode.ToLower();
if (mode == "days")
{
duration = new TimeSpan(Convert.ToInt32(num), 0, 0, 0);
}
if (mode == "hours")
{
duration = new TimeSpan(0, Convert.ToInt32(num), 0, 0);
}
if (mode == "minutes")
{
duration = new TimeSpan(0, 0, Convert.ToInt32(num), 0);
}
if (mode == "seconds")
{
duration = new TimeSpan(0, 0, 0, Convert.ToInt32(num));
}
return(new LTime(duration));
}
public object VisitDuration(DurationExpr expr)
{
return(null);
}
