68 lines
1.7 KiB
JavaScript
68 lines
1.7 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isObject = require( '@stdlib/assert-is-plain-object' );
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var hasOwnProp = require( '@stdlib/assert-has-own-property' );
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var isString = require( '@stdlib/assert-is-string' ).isPrimitive;
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var format = require( '@stdlib/string-format' );
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// MAIN //
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/**
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* Validates function options.
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*
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* @private
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* @param {Object} opts - destination object
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* @param {Options} options - function options
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* @param {string} [options.dir] - base directory
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* @returns {(Error|null)} error object or null
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*
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* @example
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* var opts = {};
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* var options = {
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* 'dir': '/foo/bar/baz'
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* };
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*
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* var err = validate( opts, options );
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* if ( err ) {
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* throw err;
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* }
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*/
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function validate( opts, options ) {
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if ( !isObject( options ) ) {
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return new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
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}
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if ( hasOwnProp( options, 'dir' ) ) {
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opts.dir = options.dir;
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if ( !isString( opts.dir ) ) {
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return new TypeError( format( 'invalid option. `%s` option must be a string. Option: `%s`.', 'dir', opts.dir ) );
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}
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}
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return null;
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}
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// EXPORTS //
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module.exports = validate;
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