'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 URI = require( 'urijs' );
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var regexp = require( './regexp' );
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/**
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* UrlHelper constructor
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* @constructor
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* @param {String} rule CSS rule with url().
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*/
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var UrlHelper = function ( rule ) {
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var exports = {};
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if ( ! ( this instanceof UrlHelper ) ) {
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return new UrlHelper( rule );
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}
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this._originalURI = this._extractURI( rule );
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if ( !this._originalURI && this._originalURI !== '') { return false; }
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this._originalRule = rule;
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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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return exports;
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};
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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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UrlHelper.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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return '';
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};
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/**
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* Returns original URI.
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* @returns {String} Original URI.
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*/
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UrlHelper.prototype.getOriginalURI = function () {
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return this._originalURI;
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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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UrlHelper.prototype.getModifiedRule = function () {
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var modifiedURI = this.URI.toString();
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var originalHasIEFix = this._originalURI.match( /\?#iefix/ );
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var modifiedShouldHaveIEFix = modifiedURI.match( /[^?]#iefix/ );
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// TODO Remove VERY ugly ?#iefix exeption handling, urijs normalizing it and removing "?"
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if ( originalHasIEFix && modifiedShouldHaveIEFix ) {
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modifiedURI = modifiedURI.replace( '#iefix', '?#iefix' );
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}
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if (this._originalRule.match(/url\(\s*\)/) && modifiedURI) {
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return "url('" + modifiedURI + "')";
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}
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return this._originalRule.replace( this._originalURI, modifiedURI );
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};
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/**
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* Returns original rule.
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* @returns {String} Original rule.
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*/
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UrlHelper.prototype.getOriginalRule = function () {
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return this._originalRule;
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};
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module.exports = UrlHelper;
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