/
validate.js
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/
validate.js
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import addAbsolutePathKeyword from "./keywords/absolutePath";
import addUndefinedAsNullKeyword from "./keywords/undefinedAsNull";
import ValidationError from "./ValidationError";
/**
* @template T
* @param fn {(function(): any) | undefined}
* @returns {function(): T}
*/
const memoize = (fn) => {
let cache = false;
/** @type {T} */
let result;
return () => {
if (cache) {
return result;
}
result = /** @type {function(): any} */ (fn)();
cache = true;
// Allow to clean up memory for fn
// and all dependent resources
// eslint-disable-next-line no-undefined, no-param-reassign
fn = undefined;
return result;
};
};
const getAjv = memoize(() => {
// Use CommonJS require for ajv libs so TypeScript consumers aren't locked into esModuleInterop (see #110).
// eslint-disable-next-line global-require
const Ajv = require("ajv").default;
// eslint-disable-next-line global-require
const ajvKeywords = require("ajv-keywords").default;
// eslint-disable-next-line global-require
const addFormats = require("ajv-formats").default;
/**
* @type {Ajv}
*/
const ajv = new Ajv({
strict: false,
allErrors: true,
verbose: true,
$data: true,
});
ajvKeywords(ajv, ["instanceof", "patternRequired"]);
addFormats(ajv, { keywords: true });
// Custom keywords
addAbsolutePathKeyword(ajv);
addUndefinedAsNullKeyword(ajv);
return ajv;
});
/** @typedef {import("json-schema").JSONSchema4} JSONSchema4 */
/** @typedef {import("json-schema").JSONSchema6} JSONSchema6 */
/** @typedef {import("json-schema").JSONSchema7} JSONSchema7 */
/** @typedef {import("ajv").ErrorObject} ErrorObject */
/**
* @typedef {Object} Extend
* @property {string=} formatMinimum
* @property {string=} formatMaximum
* @property {string=} formatExclusiveMinimum
* @property {string=} formatExclusiveMaximum
* @property {string=} link
* @property {boolean=} undefinedAsNull
*/
/** @typedef {(JSONSchema4 | JSONSchema6 | JSONSchema7) & Extend} Schema */
/** @typedef {ErrorObject & { children?: Array<ErrorObject>}} SchemaUtilErrorObject */
/**
* @callback PostFormatter
* @param {string} formattedError
* @param {SchemaUtilErrorObject} error
* @returns {string}
*/
/**
* @typedef {Object} ValidationErrorConfiguration
* @property {string=} name
* @property {string=} baseDataPath
* @property {PostFormatter=} postFormatter
*/
/**
* @param {Schema} schema
* @param {Array<object> | object} options
* @param {ValidationErrorConfiguration=} configuration
* @returns {void}
*/
function validate(schema, options, configuration) {
let errors = [];
if (Array.isArray(options)) {
errors = Array.from(options, (nestedOptions) =>
validateObject(schema, nestedOptions)
);
errors.forEach((list, idx) => {
const applyPrefix =
/**
* @param {SchemaUtilErrorObject} error
*/
(error) => {
// eslint-disable-next-line no-param-reassign
error.instancePath = `[${idx}]${error.instancePath}`;
if (error.children) {
error.children.forEach(applyPrefix);
}
};
list.forEach(applyPrefix);
});
errors = errors.reduce((arr, items) => {
arr.push(...items);
return arr;
}, []);
} else {
errors = validateObject(schema, options);
}
if (errors.length > 0) {
throw new ValidationError(errors, schema, configuration);
}
}
/**
* @param {Schema} schema
* @param {Array<object> | object} options
* @returns {Array<SchemaUtilErrorObject>}
*/
function validateObject(schema, options) {
const compiledSchema = getAjv().compile(schema);
const valid = compiledSchema(options);
if (valid) return [];
return compiledSchema.errors ? filterErrors(compiledSchema.errors) : [];
}
/**
* @param {Array<ErrorObject>} errors
* @returns {Array<SchemaUtilErrorObject>}
*/
function filterErrors(errors) {
/** @type {Array<SchemaUtilErrorObject>} */
let newErrors = [];
for (const error of /** @type {Array<SchemaUtilErrorObject>} */ (errors)) {
const { instancePath } = error;
/** @type {Array<SchemaUtilErrorObject>} */
let children = [];
newErrors = newErrors.filter((oldError) => {
if (oldError.instancePath.includes(instancePath)) {
if (oldError.children) {
children = children.concat(oldError.children.slice(0));
}
// eslint-disable-next-line no-undefined, no-param-reassign
oldError.children = undefined;
children.push(oldError);
return false;
}
return true;
});
if (children.length) {
error.children = children;
}
newErrors.push(error);
}
return newErrors;
}
export { validate, ValidationError };