/// <inheritdoc />
public override async Task <IEnumerable <DocumentItemExecution> > Render(IByteCounterStream outputStream, ContextObject context, ScopeData scopeData)
{
if (context == null)
{
return(new DocumentItemExecution[0]);
}
var c = await context.GetContextForPath(Value, scopeData);
if (FormatString != null && FormatString.Any())
{
var argList = new List <KeyValuePair <string, object> >();
foreach (var formatterArgument in FormatString)
{
//if pre and suffixed by a $ its a reference to another field.
//walk the path in the $ and use the value in the formatter
var trimmedArg = formatterArgument.Argument?.Trim();
if (trimmedArg != null && trimmedArg.StartsWith("$") &&
trimmedArg.EndsWith("$"))
{
var formatContext = await context.GetContextForPath(trimmedArg.Trim('$'), scopeData);
await formatContext.EnsureValue();
argList.Add(new KeyValuePair <string, object>(formatterArgument.Name, formatContext.Value));
}
else
{
argList.Add(new KeyValuePair <string, object>(formatterArgument.Name, formatterArgument.Argument));
}
}
//we do NOT await the task here. We await the task only if we need the value
context.Value = c.Format(argList.ToArray());
}
else
{
context.Value = c.Format(new KeyValuePair <string, object> [0]);
}
return(Children.WithScope(context));
}