'use strict';
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// using URLjs because I don't want to think about all this:
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// http://blog.lunatech.com/2009/02/03/what-every-web-developer-must-know-about-url-encoding
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var regexp = require( './regexp' );
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var URI = require( 'urijs' );
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var UrlHelper = require( './url' );
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/**
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* ImportHelper constructor
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* @constructor
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* @param {String} rule @import value.
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*/
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var ImportHelper = function ( rule ) {
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var exports = {};
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if ( ! ( this instanceof ImportHelper ) ) {
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return new ImportHelper( rule );
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}
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this._originalURI = this._extractURI( rule );
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if ( !this._originalURI ) { return false; }
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this._originalRule = rule;
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this._mediaQuery = this.getOriginalMediaQuery();
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this.URI = URI( this._originalURI );
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exports.URI = this.URI;
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exports.getOriginalURI = this.getOriginalURI.bind( this );
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exports.getModifiedRule = this.getModifiedRule.bind( this );
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exports.getOriginalRule = this.getOriginalRule.bind( this );
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exports.setMediaQuery = this.setMediaQuery.bind( this );
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exports.getMediaQuery = this.getMediaQuery.bind( this );
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exports.getOriginalMediaQuery = this.getOriginalMediaQuery.bind( this );
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return exports;
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};
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ImportHelper.prototype = Object.create( UrlHelper.prototype );
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ImportHelper.prototype.constructor = ImportHelper;
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/**
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* Extracts URI from rule.
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* @private
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* @param {String} rule String to test.
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* @returns {String|undefined} Returns URI value or undefined.
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*/
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ImportHelper.prototype._extractURI = function( rule ) {
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if ( rule.match( regexp.URLS ) ) {
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return rule.match( regexp.URLS )[ 0 ]
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.replace( /^url\s?\(/, '' )
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.replace( /\)$/, '' )
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.trim()
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.replace( /^("|\')/, '' )
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.replace( /("|\')$/, '' );
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}
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else if ( rule.match( regexp.STRINGS ) ) {
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return rule.match( regexp.STRINGS )[ 0 ]
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.replace( /^("|\')/, '' )
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.replace( /("|\')$/, '' );
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}
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};
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/**
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* Returns media query from original string.
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* @returns {String|boolean} Media query or false.
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*/
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ImportHelper.prototype.getOriginalMediaQuery = function() {
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var query = this.getOriginalRule();
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if ( query.match( regexp.URLS ) ) {
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query = query.replace( regexp.URLS, '' ).trim();
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}
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else {
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query = query.replace( regexp.STRINGS, '' ).trim();
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}
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return query || false;
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};
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/**
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* Returns current media query.
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* @returns {String|boolean} Media query or false.
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*/
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ImportHelper.prototype.getMediaQuery = function() {
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return this._mediaQuery;
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};
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/**
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* Sets media query value.
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* @param {String} query New media query.
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*/
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ImportHelper.prototype.setMediaQuery = function( query ) {
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this._mediaQuery = query;
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};
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/**
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* Returns modified rule.
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* @returns {String} Modified rule.
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*/
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ImportHelper.prototype.getModifiedRule = function () {
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var rule = UrlHelper.prototype.getModifiedRule.apply( this );
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if ( this.getMediaQuery() !== this.getOriginalMediaQuery() ) {
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if ( this.getOriginalMediaQuery() ) {
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rule = rule.replace( this.getOriginalMediaQuery(), this.getMediaQuery() || '' ).trim();
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}
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else if ( this.getMediaQuery() ) {
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rule = rule + ' ' + this.getMediaQuery();
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}
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}
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return rule;
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};
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module.exports = ImportHelper;
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