graphql
Version:
A Query Language and Runtime which can target any service.
214 lines • 8.35 kB
JavaScript
import { inspect } from "../jsutils/inspect.mjs";
import { instanceOf } from "../jsutils/instanceOf.mjs";
import { toObjMapWithSymbols } from "../jsutils/toObjMap.mjs";
import { OperationTypeNode } from "../language/ast.mjs";
import { getNamedType, isInputObjectType, isInterfaceType, isObjectType, isUnionType, } from "./definition.mjs";
import { isDirective, specifiedDirectives } from "./directives.mjs";
import { __Schema, SchemaMetaFieldDef, TypeMetaFieldDef, TypeNameMetaFieldDef, } from "./introspection.mjs";
export function isSchema(schema) {
return instanceOf(schema, schemaSymbol, GraphQLSchema);
}
export function assertSchema(schema) {
if (!isSchema(schema)) {
throw new Error(`Expected ${inspect(schema)} to be a GraphQL schema.`);
}
return schema;
}
const schemaSymbol = Symbol('Schema');
export class GraphQLSchema {
constructor(config) {
this.__kind = schemaSymbol;
this.assumeValid = config.assumeValid ?? false;
this.__validationErrors = config.assumeValid === true ? [] : undefined;
this.description = config.description;
this.extensions = toObjMapWithSymbols(config.extensions);
this.astNode = config.astNode;
this.extensionASTNodes = config.extensionASTNodes ?? [];
this._queryType = config.query;
this._mutationType = config.mutation;
this._subscriptionType = config.subscription;
this._directives = config.directives ?? specifiedDirectives;
const allReferencedTypes = new Set(config.types);
if (config.types != null) {
for (const type of config.types) {
allReferencedTypes.delete(type);
collectReferencedTypes(type, allReferencedTypes);
}
}
if (this._queryType != null) {
collectReferencedTypes(this._queryType, allReferencedTypes);
}
if (this._mutationType != null) {
collectReferencedTypes(this._mutationType, allReferencedTypes);
}
if (this._subscriptionType != null) {
collectReferencedTypes(this._subscriptionType, allReferencedTypes);
}
for (const directive of this._directives) {
if (isDirective(directive)) {
for (const arg of directive.args) {
collectReferencedTypes(arg.type, allReferencedTypes);
}
}
}
collectReferencedTypes(__Schema, allReferencedTypes);
this._typeMap = Object.create(null);
this._subTypeMap = new Map();
this._implementationsMap = Object.create(null);
for (const namedType of allReferencedTypes) {
if (namedType == null) {
continue;
}
const typeName = namedType.name;
if (this._typeMap[typeName] !== undefined) {
throw new Error(`Schema must contain uniquely named types but contains multiple types named "${typeName}".`);
}
this._typeMap[typeName] = namedType;
if (isInterfaceType(namedType)) {
for (const iface of namedType.getInterfaces()) {
if (isInterfaceType(iface)) {
let implementations = this._implementationsMap[iface.name];
implementations ??= this._implementationsMap[iface.name] = {
objects: [],
interfaces: [],
};
implementations.interfaces.push(namedType);
}
}
}
else if (isObjectType(namedType)) {
for (const iface of namedType.getInterfaces()) {
if (isInterfaceType(iface)) {
let implementations = this._implementationsMap[iface.name];
implementations ??= this._implementationsMap[iface.name] = {
objects: [],
interfaces: [],
};
implementations.objects.push(namedType);
}
}
}
}
}
get [Symbol.toStringTag]() {
return 'GraphQLSchema';
}
getQueryType() {
return this._queryType;
}
getMutationType() {
return this._mutationType;
}
getSubscriptionType() {
return this._subscriptionType;
}
getRootType(operation) {
switch (operation) {
case OperationTypeNode.QUERY:
return this.getQueryType();
case OperationTypeNode.MUTATION:
return this.getMutationType();
case OperationTypeNode.SUBSCRIPTION:
return this.getSubscriptionType();
}
}
getTypeMap() {
return this._typeMap;
}
getType(name) {
return this.getTypeMap()[name];
}
getPossibleTypes(abstractType) {
return isUnionType(abstractType)
? abstractType.getTypes()
: this.getImplementations(abstractType).objects;
}
getImplementations(interfaceType) {
const implementations = this._implementationsMap[interfaceType.name];
return implementations ?? { objects: [], interfaces: [] };
}
isSubType(abstractType, maybeSubType) {
let set = this._subTypeMap.get(abstractType);
if (set === undefined) {
if (isUnionType(abstractType)) {
set = new Set(abstractType.getTypes());
}
else {
const implementations = this.getImplementations(abstractType);
set = new Set([
...implementations.objects,
...implementations.interfaces,
]);
}
this._subTypeMap.set(abstractType, set);
}
return set.has(maybeSubType);
}
getDirectives() {
return this._directives;
}
getDirective(name) {
return this.getDirectives().find((directive) => directive.name === name);
}
getField(parentType, fieldName) {
switch (fieldName) {
case SchemaMetaFieldDef.name:
return this.getQueryType() === parentType
? SchemaMetaFieldDef
: undefined;
case TypeMetaFieldDef.name:
return this.getQueryType() === parentType
? TypeMetaFieldDef
: undefined;
case TypeNameMetaFieldDef.name:
return TypeNameMetaFieldDef;
}
if ('getFields' in parentType) {
return parentType.getFields()[fieldName];
}
return undefined;
}
toConfig() {
return {
description: this.description,
query: this.getQueryType(),
mutation: this.getMutationType(),
subscription: this.getSubscriptionType(),
types: Object.values(this.getTypeMap()),
directives: this.getDirectives(),
extensions: this.extensions,
astNode: this.astNode,
extensionASTNodes: this.extensionASTNodes,
assumeValid: this.assumeValid,
};
}
}
function collectReferencedTypes(type, typeSet) {
const namedType = getNamedType(type);
if (!typeSet.has(namedType)) {
typeSet.add(namedType);
if (isUnionType(namedType)) {
for (const memberType of namedType.getTypes()) {
collectReferencedTypes(memberType, typeSet);
}
}
else if (isObjectType(namedType) || isInterfaceType(namedType)) {
for (const interfaceType of namedType.getInterfaces()) {
collectReferencedTypes(interfaceType, typeSet);
}
for (const field of Object.values(namedType.getFields())) {
collectReferencedTypes(field.type, typeSet);
for (const arg of field.args) {
collectReferencedTypes(arg.type, typeSet);
}
}
}
else if (isInputObjectType(namedType)) {
for (const field of Object.values(namedType.getFields())) {
collectReferencedTypes(field.type, typeSet);
}
}
}
return typeSet;
}
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