// http://facebook.github.io/graphql/June2018/#AreTypesCompatible()
private bool AreTypesCompatible(
ITypeNode variableType,
IType locationType)
{
if (locationType.IsNonNullType())
{
if (variableType.IsNonNullType())
{
return(AreTypesCompatible(
variableType.InnerType(),
locationType.InnerType()));
}
return(false);
}
if (variableType.IsNonNullType())
{
return(AreTypesCompatible(
variableType.InnerType(),
locationType));
}
if (locationType.IsListType())
{
if (variableType.IsListType())
{
return(AreTypesCompatible(
variableType.InnerType(),
locationType.InnerType()));
}
return(false);
}
if (variableType.IsListType())
{
return(false);
}
if (variableType is NamedTypeNode vn &&
locationType is INamedType lt)
{
return(string.Equals(
vn.Name.Value,
lt.Name,
StringComparison.Ordinal));
}
return(false);
}
// helpers
protected TypeDefinitionField TransformTypeField(ITypeNode type, TypeDefinitionField context, bool nullable = false)
{
var ctx = context ?? new TypeDefinitionField();
if (type.IsNonNullType())
{
ctx.NotNullable = true;
return(TransformTypeField(type.InnerType(), ctx));
}
if (type.IsListType())
{
ctx.IsList = true;
ctx.InnerType = TransformTypeField(type.InnerType(), null);
return(ctx);
}
ctx.Type = type.ToString();
return(ctx);
}