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// @flow strict
import objectValues from '../polyfills/objectValues';
import type { ObjMap } from '../jsutils/ObjMap';
import inspect from '../jsutils/inspect';
import invariant from '../jsutils/invariant';
import keyValMap from '../jsutils/keyValMap';
import naturalCompare from '../jsutils/naturalCompare';
import type {
GraphQLType,
GraphQLNamedType,
GraphQLFieldConfigMap,
GraphQLFieldConfigArgumentMap,
GraphQLInputFieldConfigMap,
} from '../type/definition';
import { GraphQLSchema } from '../type/schema';
import { GraphQLDirective } from '../type/directives';
import { isIntrospectionType } from '../type/introspection';
import {
GraphQLList,
GraphQLNonNull,
GraphQLObjectType,
GraphQLInterfaceType,
GraphQLUnionType,
GraphQLEnumType,
GraphQLInputObjectType,
isListType,
isNonNullType,
isScalarType,
isObjectType,
isInterfaceType,
isUnionType,
isEnumType,
isInputObjectType,
} from '../type/definition';
/**
* Sort GraphQLSchema.
*
* This function returns a sorted copy of the given GraphQLSchema.
*/
export function lexicographicSortSchema(schema: GraphQLSchema): GraphQLSchema {
const schemaConfig = schema.toConfig();
const typeMap = keyValMap(
sortByName(schemaConfig.types),
(type) => type.name,
sortNamedType,
);
return new GraphQLSchema({
...schemaConfig,
types: objectValues(typeMap),
directives: sortByName(schemaConfig.directives).map(sortDirective),
query: replaceMaybeType(schemaConfig.query),
mutation: replaceMaybeType(schemaConfig.mutation),
subscription: replaceMaybeType(schemaConfig.subscription),
});
function replaceType<T: GraphQLType>(type: T): T {
if (isListType(type)) {
// $FlowFixMe[incompatible-return]
return new GraphQLList(replaceType(type.ofType));
} else if (isNonNullType(type)) {
// $FlowFixMe[incompatible-return]
return new GraphQLNonNull(replaceType(type.ofType));
}
return replaceNamedType(type);
}
function replaceNamedType<T: GraphQLNamedType>(type: T): T {
return ((typeMap[type.name]: any): T);
}
function replaceMaybeType<T: ?GraphQLNamedType>(maybeType: T): T {
return maybeType && replaceNamedType(maybeType);
}
function sortDirective(directive: GraphQLDirective) {
const config = directive.toConfig();
return new GraphQLDirective({
...config,
locations: sortBy(config.locations, (x) => x),
args: sortArgs(config.args),
});
}
function sortArgs(args: GraphQLFieldConfigArgumentMap) {
return sortObjMap(args, (arg) => ({
...arg,
type: replaceType(arg.type),
}));
}
function sortFields(fieldsMap: GraphQLFieldConfigMap<mixed, mixed>) {
return sortObjMap(fieldsMap, (field) => ({
...field,
type: replaceType(field.type),
args: sortArgs(field.args),
}));
}
function sortInputFields(fieldsMap: GraphQLInputFieldConfigMap) {
return sortObjMap(fieldsMap, (field) => ({
...field,
type: replaceType(field.type),
}));
}
function sortTypes<T: GraphQLNamedType>(arr: $ReadOnlyArray<T>): Array<T> {
return sortByName(arr).map(replaceNamedType);
}
function sortNamedType(type: GraphQLNamedType): GraphQLNamedType {
if (isScalarType(type) || isIntrospectionType(type)) {
return type;
}
if (isObjectType(type)) {
const config = type.toConfig();
return new GraphQLObjectType({
...config,
interfaces: () => sortTypes(config.interfaces),
fields: () => sortFields(config.fields),
});
}
if (isInterfaceType(type)) {
const config = type.toConfig();
return new GraphQLInterfaceType({
...config,
interfaces: () => sortTypes(config.interfaces),
fields: () => sortFields(config.fields),
});
}
if (isUnionType(type)) {
const config = type.toConfig();
return new GraphQLUnionType({
...config,
types: () => sortTypes(config.types),
});
}
if (isEnumType(type)) {
const config = type.toConfig();
return new GraphQLEnumType({
...config,
values: sortObjMap(config.values),
});
}
// istanbul ignore else (See: 'https://github.com/graphql/graphql-js/issues/2618')
if (isInputObjectType(type)) {
const config = type.toConfig();
return new GraphQLInputObjectType({
...config,
fields: () => sortInputFields(config.fields),
});
}
// istanbul ignore next (Not reachable. All possible types have been considered)
invariant(false, 'Unexpected type: ' + inspect((type: empty)));
}
}
function sortObjMap<T, R>(map: ObjMap<T>, sortValueFn?: (T) => R): ObjMap<R> {
const sortedMap = Object.create(null);
const sortedKeys = sortBy(Object.keys(map), (x) => x);
for (const key of sortedKeys) {
const value = map[key];
sortedMap[key] = sortValueFn ? sortValueFn(value) : value;
}
return sortedMap;
}
function sortByName<T: { +name: string, ... }>(
array: $ReadOnlyArray<T>,
): Array<T> {
return sortBy(array, (obj) => obj.name);
}
function sortBy<T>(
array: $ReadOnlyArray<T>,
mapToKey: (T) => string,
): Array<T> {
return array.slice().sort((obj1, obj2) => {
const key1 = mapToKey(obj1);
const key2 = mapToKey(obj2);
return naturalCompare(key1, key2);
});
}
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