/// <exception cref="IndexedParseException"></exception>
/// <inheritdoc />
public override async Task <IEnumerable <DocumentItemExecution> > Render(IByteCounterStream outputStream, ContextObject context, ScopeData scopeData)
{
//if we're in the same scope, just negating, then we want to use the same object
//var c = await context.GetContextForPath(Value, scopeData);
var c = await MorestachioExpression.GetValue(context, scopeData);
if (!await c.Exists())
{
return(new DocumentItemExecution[0]);
}
if (!(c.Value is IEnumerable value) || value is string || value is IDictionary <string, object> )
{
var path = new Stack <string>();
var parent = context.Parent;
while (parent != null)
{
path.Push(parent.Key);
parent = parent.Parent;
}
throw new IndexedParseException(CharacterLocationExtended.Empty,
string.Format("{1}'{0}' is used like an array by the template, but is a scalar value or object in your model." + " Complete Expression until Error:{2}",
MorestachioExpression.ToString(), base.ExpressionStart, (path.Count == 0 ? "Empty" : path.Aggregate((e, f) => e + "\r\n" + f))));
}
var scopes = new List <DocumentItemExecution>();
//Use this "lookahead" enumeration to allow the $last keyword
var index = 0;
var enumerator = value.GetEnumerator();
if (!enumerator.MoveNext())
{
return(new DocumentItemExecution[0]);
}
var current = enumerator.Current;
do
{
var next = enumerator.MoveNext() ? enumerator.Current : null;
var innerContext = new ContextCollection(index, next == null, context.Options, $"[{index}]", c)
{
Value = current,
};
scopes.AddRange(Children.WithScope(innerContext.MakeNatural()));
index++;
current = next;
} while (current != null && ContinueBuilding(outputStream, context));
return(scopes);
}
