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import type {AnySchema, AnySchemaObject, UriResolver} from "../types" import type Ajv from "../ajv" import type {URIComponents} from "uri-js" import {eachItem} from "./util" import * as equal from "fast-deep-equal" import * as traverse from "json-schema-traverse" // the hash of local references inside the schema (created by getSchemaRefs), used for inline resolution export type LocalRefs = {[Ref in string]?: AnySchemaObject} // TODO refactor to use keyword definitions const SIMPLE_INLINED = new Set([ "type", "format", "pattern", "maxLength", "minLength", "maxProperties", "minProperties", "maxItems", "minItems", "maximum", "minimum", "uniqueItems", "multipleOf", "required", "enum", "const", ]) export function inlineRef(schema: AnySchema, limit: boolean | number = true): boolean { if (typeof schema == "boolean") return true if (limit === true) return !hasRef(schema) if (!limit) return false return countKeys(schema) <= limit } const REF_KEYWORDS = new Set([ "$ref", "$recursiveRef", "$recursiveAnchor", "$dynamicRef", "$dynamicAnchor", ]) function hasRef(schema: AnySchemaObject): boolean { for (const key in schema) { if (REF_KEYWORDS.has(key)) return true const sch = schema[key] if (Array.isArray(sch) && sch.some(hasRef)) return true if (typeof sch == "object" && hasRef(sch)) return true } return false } function countKeys(schema: AnySchemaObject): number { let count = 0 for (const key in schema) { if (key === "$ref") return Infinity count++ if (SIMPLE_INLINED.has(key)) continue if (typeof schema[key] == "object") { eachItem(schema[key], (sch) => (count += countKeys(sch))) } if (count === Infinity) return Infinity } return count } export function getFullPath(resolver: UriResolver, id = "", normalize?: boolean): string { if (normalize !== false) id = normalizeId(id) const p = resolver.parse(id) return _getFullPath(resolver, p) } export function _getFullPath(resolver: UriResolver, p: URIComponents): string { const serialized = resolver.serialize(p) return serialized.split("#")[0] + "#" } const TRAILING_SLASH_HASH = /#\/?$/ export function normalizeId(id: string | undefined): string { return id ? id.replace(TRAILING_SLASH_HASH, "") : "" } export function resolveUrl(resolver: UriResolver, baseId: string, id: string): string { id = normalizeId(id) return resolver.resolve(baseId, id) } const ANCHOR = /^[a-z_][-a-z0-9._]*$/i export function getSchemaRefs(this: Ajv, schema: AnySchema, baseId: string): LocalRefs { if (typeof schema == "boolean") return {} const {schemaId, uriResolver} = this.opts const schId = normalizeId(schema[schemaId] || baseId) const baseIds: {[JsonPtr in string]?: string} = {"": schId} const pathPrefix = getFullPath(uriResolver, schId, false) const localRefs: LocalRefs = {} const schemaRefs: Set<string> = new Set() traverse(schema, {allKeys: true}, (sch, jsonPtr, _, parentJsonPtr) => { if (parentJsonPtr === undefined) return const fullPath = pathPrefix + jsonPtr let baseId = baseIds[parentJsonPtr] if (typeof sch[schemaId] == "string") baseId = addRef.call(this, sch[schemaId]) addAnchor.call(this, sch.$anchor) addAnchor.call(this, sch.$dynamicAnchor) baseIds[jsonPtr] = baseId function addRef(this: Ajv, ref: string): string { // eslint-disable-next-line @typescript-eslint/unbound-method const _resolve = this.opts.uriResolver.resolve ref = normalizeId(baseId ? _resolve(baseId, ref) : ref) if (schemaRefs.has(ref)) throw ambiguos(ref) schemaRefs.add(ref) let schOrRef = this.refs[ref] if (typeof schOrRef == "string") schOrRef = this.refs[schOrRef] if (typeof schOrRef == "object") { checkAmbiguosRef(sch, schOrRef.schema, ref) } else if (ref !== normalizeId(fullPath)) { if (ref[0] === "#") { checkAmbiguosRef(sch, localRefs[ref], ref) localRefs[ref] = sch } else { this.refs[ref] = fullPath } } return ref } function addAnchor(this: Ajv, anchor: unknown): void { if (typeof anchor == "string") { if (!ANCHOR.test(anchor)) throw new Error(`invalid anchor "${anchor}"`) addRef.call(this, `#${anchor}`) } } }) return localRefs function checkAmbiguosRef(sch1: AnySchema, sch2: AnySchema | undefined, ref: string): void { if (sch2 !== undefined && !equal(sch1, sch2)) throw ambiguos(ref) } function ambiguos(ref: string): Error { return new Error(`reference "${ref}" resolves to more than one schema`) } }