289 lines
10 KiB
TypeScript
289 lines
10 KiB
TypeScript
import jsonParser from "./parsers/json.js";
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import yamlParser from "./parsers/yaml.js";
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import textParser from "./parsers/text.js";
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import binaryParser from "./parsers/binary.js";
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import fileResolver from "./resolvers/file.js";
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import httpResolver from "./resolvers/http.js";
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import type { HTTPResolverOptions, JSONSchema, JSONSchemaObject, Plugin, ResolverOptions } from "./types/index.js";
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export type DeepPartial<T> = T extends object
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? {
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[P in keyof T]?: DeepPartial<T[P]>;
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}
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: T;
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export interface BundleOptions {
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/**
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* A function, called for each path, which can return true to stop this path and all
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* subpaths from being processed further. This is useful in schemas where some
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* subpaths contain literal $ref keys that should not be changed.
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*/
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excludedPathMatcher?(path: string): boolean;
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/**
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* Callback invoked during bundling.
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*
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* @argument {string} path - The path being processed (ie. the `$ref` string)
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* @argument {JSONSchemaObject} value - The JSON-Schema that the `$ref` resolved to
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* @argument {JSONSchemaObject} parent - The parent of the processed object
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* @argument {string} parentPropName - The prop name of the parent object whose value was processed
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*/
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onBundle?(path: string, value: JSONSchemaObject, parent?: JSONSchemaObject, parentPropName?: string): void;
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}
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export interface DereferenceOptions {
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/**
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* Determines whether circular `$ref` pointers are handled.
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*
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* If set to `false`, then a `ReferenceError` will be thrown if the schema contains any circular references.
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*
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* If set to `"ignore"`, then circular references will simply be ignored. No error will be thrown, but the `$Refs.circular` property will still be set to `true`.
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*/
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circular?: boolean | "ignore";
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/**
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* A function, called for each path, which can return true to stop this path and all
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* subpaths from being dereferenced further. This is useful in schemas where some
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* subpaths contain literal $ref keys that should not be dereferenced.
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*/
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excludedPathMatcher?(path: string): boolean;
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/**
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* Callback invoked during circular reference detection.
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*
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* @argument {string} path - The path that is circular (ie. the `$ref` string)
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*/
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onCircular?(path: string): void;
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/**
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* Callback invoked during dereferencing.
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*
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* @argument {string} path - The path being dereferenced (ie. the `$ref` string)
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* @argument {JSONSchemaObject} value - The JSON-Schema that the `$ref` resolved to
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* @argument {JSONSchemaObject} parent - The parent of the dereferenced object
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* @argument {string} parentPropName - The prop name of the parent object whose value was dereferenced
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*/
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onDereference?(path: string, value: JSONSchemaObject, parent?: JSONSchemaObject, parentPropName?: string): void;
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/**
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* An array of properties to preserve when dereferencing a `$ref` schema. Useful if you want to
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* enforce non-standard dereferencing behavior like present in the OpenAPI 3.1 specification where
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* `description` and `summary` properties are preserved when alongside a `$ref` pointer.
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*
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* If none supplied then no properties will be preserved and the object will be fully replaced
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* with the dereferenced `$ref`.
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*/
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preservedProperties?: string[];
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/**
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* Whether a reference should resolve relative to its directory/path, or from the cwd
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*
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* Default: `relative`
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*/
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externalReferenceResolution?: "relative" | "root";
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}
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/**
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* Options that determine how JSON schemas are parsed, resolved, and dereferenced.
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*
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* @param [options] - Overridden options
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* @class
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*/
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export interface $RefParserOptions<S extends object = JSONSchema> {
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/**
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* The `parse` options determine how different types of files will be parsed.
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*
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* JSON Schema `$Ref` Parser comes with built-in JSON, YAML, plain-text, and binary parsers, any of which you can configure or disable. You can also add your own custom parsers if you want.
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*/
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parse: {
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json?: Plugin | boolean;
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yaml?: Plugin | boolean;
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binary?: Plugin | boolean;
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text?: Plugin | boolean;
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[key: string]: Plugin | boolean | undefined;
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};
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/**
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* The `resolve` options control how JSON Schema $Ref Parser will resolve file paths and URLs, and how those files will be read/downloaded.
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*
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* JSON Schema `$Ref` Parser comes with built-in support for HTTP and HTTPS, as well as support for local files (when running in Node.js). You can configure or disable either of these built-in resolvers. You can also add your own custom resolvers if you want.
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*/
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resolve: {
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/**
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* Determines whether external $ref pointers will be resolved. If this option is disabled, then external `$ref` pointers will simply be ignored.
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*/
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external?: boolean;
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file?: Partial<ResolverOptions<S>> | boolean;
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http?: HTTPResolverOptions<S> | boolean;
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} & {
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[key: string]: Partial<ResolverOptions<S>> | HTTPResolverOptions<S> | boolean | undefined;
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};
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/**
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* By default, JSON Schema $Ref Parser throws the first error it encounters. Setting `continueOnError` to `true`
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* causes it to keep processing as much as possible and then throw a single error that contains all errors
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* that were encountered.
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*/
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continueOnError: boolean;
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/**
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* The `bundle` options control how JSON Schema `$Ref` Parser will process `$ref` pointers within the JSON schema.
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*/
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bundle: BundleOptions;
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/**
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* The `dereference` options control how JSON Schema `$Ref` Parser will dereference `$ref` pointers within the JSON schema.
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*/
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dereference: DereferenceOptions;
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/**
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* Whether to clone the schema before dereferencing it.
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* This is useful when you want to dereference the same schema multiple times, but you don't want to modify the original schema.
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* Default: `true` due to mutating the input being the default behavior historically
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*/
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mutateInputSchema?: boolean;
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/**
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* The maximum amount of time (in milliseconds) that JSON Schema $Ref Parser will spend dereferencing a single schema.
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* It will throw a timeout error if the operation takes longer than this.
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*/
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timeoutMs?: number;
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}
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export const getJsonSchemaRefParserDefaultOptions = () => {
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const defaults = {
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/**
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* Determines how different types of files will be parsed.
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*
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* You can add additional parsers of your own, replace an existing one with
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* your own implementation, or disable any parser by setting it to false.
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*/
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parse: {
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json: { ...jsonParser },
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yaml: { ...yamlParser },
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text: { ...textParser },
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binary: { ...binaryParser },
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},
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/**
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* Determines how JSON References will be resolved.
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*
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* You can add additional resolvers of your own, replace an existing one with
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* your own implementation, or disable any resolver by setting it to false.
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*/
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resolve: {
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file: { ...fileResolver },
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http: { ...httpResolver },
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/**
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* Determines whether external $ref pointers will be resolved.
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* If this option is disabled, then none of above resolvers will be called.
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* Instead, external $ref pointers will simply be ignored.
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*
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* @type {boolean}
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*/
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external: true,
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},
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/**
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* By default, JSON Schema $Ref Parser throws the first error it encounters. Setting `continueOnError` to `true`
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* causes it to keep processing as much as possible and then throw a single error that contains all errors
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* that were encountered.
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*/
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continueOnError: false,
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/**
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* Determines the types of JSON references that are allowed.
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*/
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bundle: {
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/**
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* A function, called for each path, which can return true to stop this path and all
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* subpaths from being processed further. This is useful in schemas where some
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* subpaths contain literal $ref keys that should not be changed.
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*
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* @type {function}
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*/
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excludedPathMatcher: () => false,
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},
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/**
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* Determines the types of JSON references that are allowed.
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*/
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dereference: {
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/**
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* Dereference circular (recursive) JSON references?
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* If false, then a {@link ReferenceError} will be thrown if a circular reference is found.
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* If "ignore", then circular references will not be dereferenced.
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*
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* @type {boolean|string}
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*/
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circular: true,
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/**
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* A function, called for each path, which can return true to stop this path and all
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* subpaths from being dereferenced further. This is useful in schemas where some
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* subpaths contain literal $ref keys that should not be dereferenced.
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*
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* @type {function}
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*/
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excludedPathMatcher: () => false,
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referenceResolution: "relative",
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},
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mutateInputSchema: true,
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} as $RefParserOptions<JSONSchema>;
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return defaults;
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};
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export const getNewOptions = <S extends object = JSONSchema, O extends ParserOptions<S> = ParserOptions<S>>(
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options: O | undefined,
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): O & $RefParserOptions<S> => {
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const newOptions = getJsonSchemaRefParserDefaultOptions();
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if (options) {
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merge(newOptions, options);
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}
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return newOptions as O & $RefParserOptions<S>;
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};
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export type Options<S extends object = JSONSchema> = $RefParserOptions<S>;
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export type ParserOptions<S extends object = JSONSchema> = DeepPartial<$RefParserOptions<S>>;
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/**
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* Merges the properties of the source object into the target object.
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*
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* @param target - The object that we're populating
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* @param source - The options that are being merged
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* @returns
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*/
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function merge(target: any, source: any) {
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if (isMergeable(source)) {
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// prevent prototype pollution
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const keys = Object.keys(source).filter((key) => !["__proto__", "constructor", "prototype"].includes(key));
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for (let i = 0; i < keys.length; i++) {
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const key = keys[i];
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const sourceSetting = source[key];
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const targetSetting = target[key];
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if (isMergeable(sourceSetting)) {
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// It's a nested object, so merge it recursively
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target[key] = merge(targetSetting || {}, sourceSetting);
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} else if (sourceSetting !== undefined) {
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// It's a scalar value, function, or array. No merging necessary. Just overwrite the target value.
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target[key] = sourceSetting;
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}
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}
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}
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return target;
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}
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/**
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* Determines whether the given value can be merged,
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* or if it is a scalar value that should just override the target value.
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*
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* @param val
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* @returns
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*/
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function isMergeable(val: any) {
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return val && typeof val === "object" && !Array.isArray(val) && !(val instanceof RegExp) && !(val instanceof Date);
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}
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export default $RefParserOptions;
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