private void CollectFields(ExecutionContext context, IGraphType specificType, SelectionSet selectionSet, ref List <string> visitedFragmentNames) //TODO: can be completely eliminated? see Fields.Add
{
if (selectionSet != null)
{
foreach (var selection in selectionSet.SelectionsList)
{
if (selection is Field field)
{
if (!ExecutionHelper.ShouldIncludeNode(context, field.Directives))
{
continue;
}
Add(field);
}
else if (selection is FragmentSpread spread)
{
if ((visitedFragmentNames != null && visitedFragmentNames.Contains(spread.Name)) ||
!ExecutionHelper.ShouldIncludeNode(context, spread.Directives))
{
continue;
}
(visitedFragmentNames ??= new List <string>()).Add(spread.Name);
var fragment = context.Fragments.FindDefinition(spread.Name);
if (fragment == null ||
!ExecutionHelper.ShouldIncludeNode(context, fragment.Directives) ||
!ExecutionHelper.DoesFragmentConditionMatch(context, fragment.Type.Name, specificType))
{
continue;
}
CollectFields(context, specificType, fragment.SelectionSet, ref visitedFragmentNames);
}
else if (selection is InlineFragment inline)
{
var name = inline.Type != null ? inline.Type.Name : specificType.Name;
if (!ExecutionHelper.ShouldIncludeNode(context, inline.Directives) ||
!ExecutionHelper.DoesFragmentConditionMatch(context, name, specificType))
{
continue;
}
CollectFields(context, specificType, inline.SelectionSet, ref visitedFragmentNames);
}
}
}
}