def _build_stitch_directive(source_field_name, sink_field_name):
"""Build a Directive node for the stitch directive."""
return ast_types.DirectiveNode(
name=ast_types.NameNode(value="stitch"),
arguments=[
ast_types.ArgumentNode(
name=ast_types.NameNode(value="source_field"),
value=ast_types.StringValueNode(value=source_field_name),
),
ast_types.ArgumentNode(
name=ast_types.NameNode(value="sink_field"),
value=ast_types.StringValueNode(value=sink_field_name),
),
],
)
def visit_deprecated_directive(self, obj):
return ast.DirectiveNode(
name=_name('deprecated'),
arguments=[
ast.ArgumentNode(
name=_name('reason'),
value=ast.StringValueNode(value=obj.reason),
),
],
)
def visit_requires_directive(self, obj):
return ast.DirectiveNode(
name=_name('requires'),
arguments=[
ast.ArgumentNode(
name=_name('fields'),
value=ast.StringValueNode(value=obj.fields),
),
],
)
def visit_field(self, obj: Field):
arguments = None
if obj.options:
arguments = [
ast.ArgumentNode(name=_name(key), value=_encode(val))
for key, val in obj.options.items()
]
return ast.FieldNode(
name=_name(obj.name),
alias=_name(obj.alias),
arguments=arguments,
)
def visit_link(self, obj):
arguments = None
if obj.options:
arguments = [
ast.ArgumentNode(name=_name(key), value=_encode(val))
for key, val in obj.options.items()
]
return ast.FieldNode(
name=_name(obj.name),
alias=_name(obj.alias),
arguments=arguments,
selection_set=self.visit(obj.node),
)
def args(self, **kwargs):
if self.camelcase:
self.args_to_camelcase(kwargs)
argument_nodes = list()
for name, value in kwargs.items():
arg = self.field.args.get(name)
if not arg:
raise ValueError(f"Invalid argument {name} for field {self.name}")
arg_type_serializer = get_arg_serializer(arg.type)
value = arg_type_serializer(value)
argument_nodes.append(
ast.ArgumentNode(
name=ast.NameNode(value=name), value=get_ast_value(value)
)
)
self.ast_field.arguments = FrozenList(argument_nodes)
return self