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Filename : validators.js
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'use strict';

// This file is a proxy of the original file located at:
// https://github.com/nodejs/node/blob/main/lib/internal/validators.js
// Every addition or modification to this file must be evaluated
// during the PR review.

const {
  ArrayIsArray,
  ArrayPrototypeIncludes,
  ArrayPrototypeJoin,
} = require('./primordials');

const {
  codes: {
    ERR_INVALID_ARG_TYPE
  }
} = require('./errors');

function validateString(value, name) {
  if (typeof value !== 'string') {
    throw new ERR_INVALID_ARG_TYPE(name, 'String', value);
  }
}

function validateUnion(value, name, union) {
  if (!ArrayPrototypeIncludes(union, value)) {
    throw new ERR_INVALID_ARG_TYPE(name, `('${ArrayPrototypeJoin(union, '|')}')`, value);
  }
}

function validateBoolean(value, name) {
  if (typeof value !== 'boolean') {
    throw new ERR_INVALID_ARG_TYPE(name, 'Boolean', value);
  }
}

function validateArray(value, name) {
  if (!ArrayIsArray(value)) {
    throw new ERR_INVALID_ARG_TYPE(name, 'Array', value);
  }
}

function validateStringArray(value, name) {
  validateArray(value, name);
  for (let i = 0; i < value.length; i++) {
    validateString(value[i], `${name}[${i}]`);
  }
}

function validateBooleanArray(value, name) {
  validateArray(value, name);
  for (let i = 0; i < value.length; i++) {
    validateBoolean(value[i], `${name}[${i}]`);
  }
}

/**
 * @param {unknown} value
 * @param {string} name
 * @param {{
 *   allowArray?: boolean,
 *   allowFunction?: boolean,
 *   nullable?: boolean
 * }} [options]
 */
function validateObject(value, name, options) {
  const useDefaultOptions = options == null;
  const allowArray = useDefaultOptions ? false : options.allowArray;
  const allowFunction = useDefaultOptions ? false : options.allowFunction;
  const nullable = useDefaultOptions ? false : options.nullable;
  if ((!nullable && value === null) ||
      (!allowArray && ArrayIsArray(value)) ||
      (typeof value !== 'object' && (
        !allowFunction || typeof value !== 'function'
      ))) {
    throw new ERR_INVALID_ARG_TYPE(name, 'Object', value);
  }
}

module.exports = {
  validateArray,
  validateObject,
  validateString,
  validateStringArray,
  validateUnion,
  validateBoolean,
  validateBooleanArray,
};