/// <summary>
/// Get a filter argument from the arguments collection, or throw an exception if the argument does not exist.
/// </summary>
/// <param name="arguments"></param>
/// <param name="ordinalPosition"></param>
/// <param name="name">An optional name for the parameter that describes the expected value.</param>
/// <returns></returns>
public static FluidValue GetArgumentOrThrow(this FilterArguments arguments, int ordinalPosition, string name = null)
{
// Check for named argument first.
if (!string.IsNullOrWhiteSpace(name) &&
arguments.HasNamed(name))
{
return(arguments[name]);
}
// Check for argument in specified ordinal position.
var value = arguments.At(ordinalPosition - 1);
if (!value.IsNil())
{
return(value);
}
throw new ArgumentException($"Argument \"[{ordinalPosition:0;0;?}]{ name }\" not defined.");
}
/// <summary>
/// Get a filter argument from the arguments collection, or return a default value if the argument does not exist.
/// </summary>
/// <param name="arguments"></param>
/// <param name="ordinalPosition"></param>
/// <param name="name">An optional name for the parameter that describes the expected value.</param>
/// <param name="defaultValue"></param>
/// <returns></returns>
public static FluidValue GetArgumentOrDefault(this FilterArguments arguments, int ordinalPosition, string name, string defaultValue, TemplateOptions options)
{
// Check for named argument first.
if (!string.IsNullOrWhiteSpace(name) &&
arguments.HasNamed(name))
{
return(arguments[name] as StringValue);
}
// Check for argument in specified ordinal position.
var value = arguments.At(ordinalPosition - 1);
if (!value.IsNil())
{
return(FluidValue.Create(value, options));
}
// Return default value
return(FluidValue.Create(defaultValue, options));
}
public static ValueTask <FluidValue> FormatString(FluidValue input, FilterArguments arguments, TemplateContext context)
{
if (input.IsNil())
{
return(NilValue.Instance);
}
var format = input.ToStringValue();
var culture = context.CultureInfo;
if (arguments.HasNamed("culture"))
{
culture = CultureInfo.CreateSpecificCulture(arguments["culture"].ToStringValue()) ?? context.CultureInfo;
}
var parameters = arguments.ValuesToObjectArray();
return(new StringValue(string.Format(culture, format, parameters)));
}
public ValueTask <FluidValue> ProcessAsync(FluidValue input, FilterArguments arguments, TemplateContext ctx)
{
if (input.ToObjectValue() is TagBuilder tagBuilder)
{
if (arguments.HasNamed("add_classes"))
{
var classes = arguments["add_classes"].ToStringValue();
if (!string.IsNullOrEmpty(classes))
{
foreach (var cssClass in classes.Split(' ', StringSplitOptions.RemoveEmptyEntries))
{
tagBuilder.AddCssClass(cssClass);
}
}
}
return(new ValueTask <FluidValue>(input));
}
return(new ValueTask <FluidValue>(NilValue.Instance));
}
