public void Enter(INode node)
{
_ancestorStack.Push(node);
if (node is SelectionSet)
{
_parentTypeStack.Push(GetLastType());
return;
}
if (node is Field field)
{
var parentType = _parentTypeStack.Peek().GetNamedType();
var fieldType = GetFieldDef(_schema, parentType, field);
_fieldDefStack.Push(fieldType);
var targetType = fieldType?.ResolvedType;
_typeStack.Push(targetType);
return;
}
if (node is Directive directive)
{
_directive = _schema.FindDirective(directive.Name);
}
if (node is Operation op)
{
IGraphType type = null;
if (op.OperationType == OperationType.Query)
{
type = _schema.Query;
}
else if (op.OperationType == OperationType.Mutation)
{
type = _schema.Mutation;
}
else if (op.OperationType == OperationType.Subscription)
{
type = _schema.Subscription;
}
_typeStack.Push(type);
return;
}
if (node is FragmentDefinition def1)
{
var type = _schema.FindType(def1.Type.Name);
_typeStack.Push(type);
return;
}
if (node is InlineFragment def)
{
var type = def.Type != null?_schema.FindType(def.Type.Name) : GetLastType();
_typeStack.Push(type);
return;
}
if (node is VariableDefinition varDef)
{
var inputType = varDef.Type.GraphTypeFromType(_schema);
_inputTypeStack.Push(inputType);
return;
}
if (node is Argument argAst)
{
QueryArgument argDef = null;
IGraphType argType = null;
var args = GetDirective() != null?GetDirective()?.Arguments : GetFieldDef()?.Arguments;
if (args != null)
{
argDef = args.Find(argAst.Name);
argType = argDef?.ResolvedType;
}
_argument = argDef;
_inputTypeStack.Push(argType);
}
if (node is ListValue)
{
var type = GetInputType().GetNamedType();
_inputTypeStack.Push(type);
}
if (node is ObjectField objectField)
{
var objectType = GetInputType().GetNamedType();
IGraphType fieldType = null;
if (objectType is IInputObjectGraphType complexType)
{
var inputField = complexType.GetField(objectField.Name);
fieldType = inputField?.ResolvedType;
}
_inputTypeStack.Push(fieldType);
}
}