protected override ISyntaxVisitorAction Enter(
FieldNode node,
IDocumentValidatorContext context)
{
SelectionSetNode selectionSet = context.SelectionSets.Peek();
if (!context.FieldSets.TryGetValue(selectionSet, out IList <FieldInfo>?fields))
{
fields = context.RentFieldInfoList();
context.FieldSets.Add(selectionSet, fields);
}
if (IntrospectionFields.TypeName.Equals(node.Name.Value))
{
fields.Add(new FieldInfo(context.Types.Peek(), context.NonNullString, node));
return(Skip);
}
else if (context.Types.TryPeek(out IType type) &&
type.NamedType() is IComplexOutputType ct)
{
if (ct.Fields.TryGetField(node.Name.Value, out IOutputField of))
{
fields.Add(new FieldInfo(context.Types.Peek(), of.Type, node));
if (node.SelectionSet is null)
{
if (of.Type.NamedType().IsCompositeType())
{
context.Errors.Add(context.NoSelectionOnCompositeField(
node, ct, of.Type));
}
}
else
{
if (of.Type.NamedType().IsLeafType())
{
context.Errors.Add(context.LeafFieldsCannotHaveSelections(
node, ct, of.Type));
return(Skip);
}
}
context.OutputFields.Push(of);
context.Types.Push(of.Type);
return(Continue);
}
else
{
context.Errors.Add(context.FieldDoesNotExist(node, ct));
return(Skip);
}
}