public static string Evaluate(ITagWithVariable tag, TagModel model)
{
object result = tag.InternalEvaluate(model);
string var = tag.GetAutoValueAsString("Var", model);
string scope = tag.GetAutoValueAsString("Scope", model);
model[scope + "." + var] = result;
return String.Empty;
}
public static string EvaluateOptional(ITagWithVariable tag, TagModel model)
{
object result = tag.InternalEvaluate(model);
if (tag.Var != null)
{
string var = tag.GetAutoValueAsString("Var", model);
string scope = tag.GetAutoValueAsString("Scope", model);
model[scope + "." + var] = result;
return String.Empty;
}
return result != null ? result.ToString() : String.Empty;
}
public static string EvaluateOptional(ITagWithVariable tag, TagModel model)
{
var result = tag.InternalEvaluate(model);
if (tag.Var != null)
{
var var = tag.GetAutoValueAsString("Var", model);
var scope = tag.GetAutoValueAsString("Scope", model);
model[scope + "." + var] = result;
}
var postTag = tag as ITagWithVariableAndPostEvaluate;
postTag?.PostEvaluate(model, result);
return(tag.Var == null ? (result?.ToString() ?? string.Empty) : string.Empty);
}
public static string Evaluate(ITagWithVariable tag, TagModel model, bool naturalLanguage = false)
{
var result = tag.InternalEvaluate(model);
var var = tag.GetAutoValueAsString("Var", model);
if (naturalLanguage)
{
var = LanguageHelper.CamelCaseAttribute(var);
}
var scope = tag.GetAutoValueAs <VariableScope>("Scope", model);
if (scope != VariableScope.Page || !model.TryUpdateTag(var, result))
{
model[scope + "." + var] = result;
}
var postTag = tag as ITagWithVariableAndPostEvaluate;
postTag?.PostEvaluate(model, result);
return(string.Empty);
}