/// <summary>
/// Creates a date expression with symbol scope, context, script refernce set.
/// The date expression can handle relative dates: 'today', 'yesterday', 'tomorrow'
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static Expr Day(string name, string time, TokenData token)
{
var exp = new DayExpr();
exp.Name = name;
exp.Time = time;
SetupContext(exp, token);
return(exp);
}
/// <summary>
/// Check the day expression.
/// </summary>
public object VisitDay(DayExpr expr)
{
return(null);
}
/// <summary>
/// Execute the continue.
/// </summary>
public object VisitDay(DayExpr expr)
{
var date = DateTime.Today;
var dayOfweek = DayOfWeek.Monday;
var isDayOfWeek = false;
var isTimeSpecified = expr.Time != "0";
var dayName = expr.Name.ToLower();
// 1. Determine date/day
if (dayName == "today")
{
date = DateTime.Today;
}
else if (dayName == "yesterday")
{
date = DateTime.Today.AddDays(-1);
}
else if (dayName == "tomorrow")
{
date = DateTime.Today.AddDays(1);
}
else if (dayName == "monday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Monday;
}
else if (dayName == "tuesday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Tuesday;
}
else if (dayName == "wednesday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Wednesday;
}
else if (dayName == "thursday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Thursday;
}
else if (dayName == "friday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Friday;
}
else if (dayName == "saturday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Saturday;
}
else if (dayName == "sunday")
{
isDayOfWeek = true; dayOfweek = DayOfWeek.Sunday;
}
// Case 1 -
if (isDayOfWeek)
{
// Case 1a: day of week only
if (!isTimeSpecified)
{
return(new LDayOfWeek(dayOfweek));
}
// Case 1b: day of week ( with time )
var today = DateTime.Today;
var count = 0;
while (today.DayOfWeek != dayOfweek && count < 8)
{
today = today.AddDays(1);
}
}
// 3. Finally - add the time to the day.
if (expr.Time != "0")
{
var t = TimeSpan.Parse(expr.Time);
date = date.AddMilliseconds(t.TotalMilliseconds);
}
var result = new LDate(date);
return(result);
}
