73 lines
1.9 KiB
JavaScript
73 lines
1.9 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2018 The Stdlib Authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
// MODULES //
|
|
|
|
var hasOwnProp = require( '@stdlib/assert/has-own-property' );
|
|
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
|
|
var isObject = require( '@stdlib/assert/is-plain-object' );
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Validates function options.
|
|
*
|
|
* @private
|
|
* @param {Object} opts - destination for validated options
|
|
* @param {Options} options - function options
|
|
* @param {string} [options.copy] - string denoting whether to return a copy (`deep`, `shallow` or `none`)
|
|
* @returns {(null|Error)} null or an error
|
|
*
|
|
* @example
|
|
* var opts = {};
|
|
* var options = {
|
|
* 'copy': 'shallow'
|
|
* };
|
|
* var err = validate( opts, options );
|
|
* if ( err ) {
|
|
* throw err;
|
|
* }
|
|
*/
|
|
function validate( opts, options ) {
|
|
if ( !isObject( options ) ) {
|
|
return new TypeError( 'invalid argument. Options argument must be an object. Value: `' + options + '`.' );
|
|
}
|
|
if ( hasOwnProp( options, 'copy' ) ) {
|
|
opts.copy = options.copy;
|
|
if ( !isString( opts.copy ) ) {
|
|
return new TypeError( 'invalid option. `copy` option must be a string primitive. Option: `' + opts.copy + '`.' );
|
|
}
|
|
if (
|
|
opts.copy !== 'deep' &&
|
|
opts.copy !== 'shallow' &&
|
|
opts.copy !== 'none'
|
|
) {
|
|
return new TypeError( 'invalid option. `copy` option must be `deep`, `shallow` or `none`. Value: `' + opts.copy + '`.' );
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = validate;
|