/// <summary>
/// Retrieves the value with the given <see cref="Id"/> if possible. Otherwise evaluates the <see cref="Code"/>.
/// </summary>
/// <param name="engine">Engine to execute code against</param>
/// <returns>The value from evaluation of the <see cref="Code"/></returns>
public virtual object GetValue(ICompositionEngine engine)
{
if (Id != null)
{
var value = engine.GetProperty(Id);
if (value != null)
{
return(value);
}
}
var rawCode = Code;
if (engine.ShouldConvertTimeMarks())
{
rawCode = new TimeConverter().ReplaceTimespans(rawCode);
}
return(engine.Execute(rawCode));
}
/// <summary>
/// Builds a string, joined with the <see cref="Joiner"/> from each of the child <see cref="ILexigram"/> values with the the <paramref name="engine"/>.
/// </summary>
/// <param name="engine">The engine to execute code against</param>
/// <returns>The compiled string from the engine with the composition</returns>
public virtual string Build(ICompositionEngine engine)
{
var built = new StringBuilder();
foreach (var token in this)
{
var value = token.GetValue(engine);
built.Append(value.ToString());
if (token is IIdLexigram)
{
var id = (token as IIdLexigram).Id;
if (!string.IsNullOrWhiteSpace(id))
{
engine.SetProperty(id, value);
}
}
}
return(string.Join(Joiner, built));
}
public virtual object GetValue(ICompositionEngine engine) => Build(engine);
