public override async Task WriteAsync(
TemplateScopeContext scope, PageBlockFragment block, CancellationToken token)
{
var collection = (IEnumerable)block.Argument.GetJsExpressionAndEvaluate(scope,
ifNone: () => throw new NotSupportedException("'each' block does not have a valid expression"));
var index = 0;
if (collection != null)
{
foreach (var element in collection)
{
var scopeArgs = element.ToObjectDictionary();
scopeArgs["it"] = element;
scopeArgs[nameof(index)] = index++;
var itemScope = scope.ScopeWithParams(scopeArgs);
await WriteBodyAsync(itemScope, block, token);
}
}
if (index == 0)
{
await WriteElseAsync(scope, block.ElseBlocks, token);
}
}
public object Invoke(TemplateScopeContext scope, params object[] @params)
{
var args = new Dictionary <string, object>();
for (var i = 0; i < Params.Length; i++)
{
if (@params.Length < i)
{
break;
}
var param = Params[i];
args[param.Name] = @params[i];
}
var exprScope = scope.ScopeWithParams(args);
var ret = Body.Evaluate(exprScope);
return(ret);
}