import inspect from "../jsutils/inspect.mjs"; import invariant from "../jsutils/invariant.mjs"; import { Kind } from "../language/kinds.mjs"; import { GraphQLList, GraphQLNonNull } from "../type/definition.mjs"; /** * Given a Schema and an AST node describing a type, return a GraphQLType * definition which applies to that type. For example, if provided the parsed * AST node for `[User]`, a GraphQLList instance will be returned, containing * the type called "User" found in the schema. If a type called "User" is not * found in the schema, then undefined will be returned. */ /* eslint-disable no-redeclare */ export function typeFromAST(schema, typeNode) { /* eslint-enable no-redeclare */ var innerType; if (typeNode.kind === Kind.LIST_TYPE) { innerType = typeFromAST(schema, typeNode.type); return innerType && new GraphQLList(innerType); } if (typeNode.kind === Kind.NON_NULL_TYPE) { innerType = typeFromAST(schema, typeNode.type); return innerType && new GraphQLNonNull(innerType); } // istanbul ignore else (See: 'https://github.com/graphql/graphql-js/issues/2618') if (typeNode.kind === Kind.NAMED_TYPE) { return schema.getType(typeNode.name.value); } // istanbul ignore next (Not reachable. All possible type nodes have been considered) false || invariant(0, 'Unexpected type node: ' + inspect(typeNode)); }