boolean.js•860 B
'use strict';
const CastError = require('../error/cast');
/**
* Given a value, cast it to a boolean, or throw a `CastError` if the value
* cannot be casted. `null` and `undefined` are considered valid.
*
* @param {Any} value
* @param {String} [path] optional the path to set on the CastError
* @return {Boolean|null|undefined}
* @throws {CastError} if `value` is not one of the allowed values
* @api private
*/
module.exports = function castBoolean(value, path) {
if (module.exports.convertToTrue.has(value)) {
return true;
}
if (module.exports.convertToFalse.has(value)) {
return false;
}
if (value == null) {
return value;
}
throw new CastError('boolean', value, path);
};
module.exports.convertToTrue = new Set([true, 'true', 1, '1', 'yes']);
module.exports.convertToFalse = new Set([false, 'false', 0, '0', 'no']);