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140 lines
4.7 KiB
TypeScript
140 lines
4.7 KiB
TypeScript
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// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/type/directives.js
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import objectEntries from '../polyfills/objectEntries.js';
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import { SYMBOL_TO_STRING_TAG } from '../polyfills/symbols.js';
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import inspect from '../jsutils/inspect.js';
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import toObjMap from '../jsutils/toObjMap.js';
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import devAssert from '../jsutils/devAssert.js';
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import instanceOf from '../jsutils/instanceOf.js';
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import defineToJSON from '../jsutils/defineToJSON.js';
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import isObjectLike from '../jsutils/isObjectLike.js';
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import { DirectiveLocation } from '../language/directiveLocation.js';
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import { GraphQLString, GraphQLBoolean } from './scalars.js';
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import { argsToArgsConfig, GraphQLNonNull } from './definition.js';
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/**
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* Test if the given value is a GraphQL directive.
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*/
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// eslint-disable-next-line no-redeclare
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export function isDirective(directive) {
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return instanceOf(directive, GraphQLDirective);
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}
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export function assertDirective(directive) {
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if (!isDirective(directive)) {
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throw new Error(`Expected ${inspect(directive)} to be a GraphQL directive.`);
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}
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return directive;
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}
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/**
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* Directives are used by the GraphQL runtime as a way of modifying execution
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* behavior. Type system creators will usually not create these directly.
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*/
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export class GraphQLDirective {
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constructor(config) {
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this.name = config.name;
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this.description = config.description;
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this.locations = config.locations;
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this.isRepeatable = config.isRepeatable ?? false;
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this.extensions = config.extensions && toObjMap(config.extensions);
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this.astNode = config.astNode;
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devAssert(config.name, 'Directive must be named.');
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devAssert(Array.isArray(config.locations), `@${config.name} locations must be an Array.`);
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const args = config.args ?? {};
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devAssert(isObjectLike(args) && !Array.isArray(args), `@${config.name} args must be an object with argument names as keys.`);
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this.args = objectEntries(args).map(([argName, argConfig]) => ({
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name: argName,
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description: argConfig.description,
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type: argConfig.type,
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defaultValue: argConfig.defaultValue,
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extensions: argConfig.extensions && toObjMap(argConfig.extensions),
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astNode: argConfig.astNode
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}));
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}
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toConfig() {
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return {
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name: this.name,
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description: this.description,
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locations: this.locations,
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args: argsToArgsConfig(this.args),
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isRepeatable: this.isRepeatable,
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extensions: this.extensions,
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astNode: this.astNode
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};
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}
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toString() {
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return '@' + this.name;
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} // $FlowFixMe Flow doesn't support computed properties yet
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get [SYMBOL_TO_STRING_TAG]() {
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return 'GraphQLDirective';
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}
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}
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defineToJSON(GraphQLDirective);
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/**
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* Used to conditionally include fields or fragments.
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*/
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export const GraphQLIncludeDirective = new GraphQLDirective({
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name: 'include',
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description: 'Directs the executor to include this field or fragment only when the `if` argument is true.',
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locations: [DirectiveLocation.FIELD, DirectiveLocation.FRAGMENT_SPREAD, DirectiveLocation.INLINE_FRAGMENT],
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args: {
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if: {
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type: GraphQLNonNull(GraphQLBoolean),
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description: 'Included when true.'
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}
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}
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});
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/**
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* Used to conditionally skip (exclude) fields or fragments.
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*/
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export const GraphQLSkipDirective = new GraphQLDirective({
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name: 'skip',
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description: 'Directs the executor to skip this field or fragment when the `if` argument is true.',
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locations: [DirectiveLocation.FIELD, DirectiveLocation.FRAGMENT_SPREAD, DirectiveLocation.INLINE_FRAGMENT],
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args: {
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if: {
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type: GraphQLNonNull(GraphQLBoolean),
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description: 'Skipped when true.'
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}
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}
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});
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/**
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* Constant string used for default reason for a deprecation.
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*/
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export const DEFAULT_DEPRECATION_REASON = 'No longer supported';
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/**
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* Used to declare element of a GraphQL schema as deprecated.
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*/
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export const GraphQLDeprecatedDirective = new GraphQLDirective({
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name: 'deprecated',
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description: 'Marks an element of a GraphQL schema as no longer supported.',
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locations: [DirectiveLocation.FIELD_DEFINITION, DirectiveLocation.ENUM_VALUE],
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args: {
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reason: {
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type: GraphQLString,
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description: 'Explains why this element was deprecated, usually also including a suggestion for how to access supported similar data. Formatted using the Markdown syntax, as specified by [CommonMark](https://commonmark.org/).',
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defaultValue: DEFAULT_DEPRECATION_REASON
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}
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}
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});
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/**
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* The full list of specified directives.
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*/
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export const specifiedDirectives = Object.freeze([GraphQLIncludeDirective, GraphQLSkipDirective, GraphQLDeprecatedDirective]);
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export function isSpecifiedDirective(directive) {
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return specifiedDirectives.some(({
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name
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}) => name === directive.name);
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}
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