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# frozen_string_literal: true
module GraphQL
class Schema
# @api private
module TypeExpression
# Fetch a type from a type map by its AST specification.
# Return `nil` if not found.
# @param type_owner [#get_type] A thing for looking up types by name
# @param ast_node [GraphQL::Language::Nodes::AbstractNode]
# @return [Class, GraphQL::Schema::NonNull, GraphQL::Schema:List]
def self.build_type(type_owner, ast_node)
case ast_node
when GraphQL::Language::Nodes::TypeName
type_owner.get_type(ast_node.name) # rubocop:disable Development/ContextIsPassedCop -- this is a `context` or `warden`, it's already query-aware
when GraphQL::Language::Nodes::NonNullType
ast_inner_type = ast_node.of_type
inner_type = build_type(type_owner, ast_inner_type)
wrap_type(inner_type, :to_non_null_type)
when GraphQL::Language::Nodes::ListType
ast_inner_type = ast_node.of_type
inner_type = build_type(type_owner, ast_inner_type)
wrap_type(inner_type, :to_list_type)
else
raise "Invariant: unexpected type from ast: #{ast_node.inspect}"
end
end
class << self
private
def wrap_type(type, wrapper_method)
if type.nil?
nil
elsif wrapper_method == :to_list_type || wrapper_method == :to_non_null_type
type.public_send(wrapper_method)
else
raise ArgumentError, "Unexpected wrapper method: #{wrapper_method.inspect}"
end
end
end
end
end
end
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