calebthebrewer/gulp-selectors

var expressions = require('../utils/expressions');

/**
 * Replaces all class names with shortnames. Also builds a library of shortnames which can be
 * used to reduce other file types.
 *
 * @param {string} File
 * @returns {string} Minified file
 */
module.exports =  function(file, classLibrary, idLibrary) {
    var selectorNameMatch = expressions.selectorName;

    file = file.replace(expressions.classSelector, function(selector) {
        //exclude property values (matches ending in ')')
        if (selector[selector.length - 1] === ')') {
            return selector;
        }
        return selector.replace(selectorNameMatch, function(selectorName) {
            return classLibrary.get(selectorName, true);
        });
    });

    file = file.replace(expressions.idSelector, function(selector) {
        //exclude property values (matches ending in '; or }')
        if (selector[selector.length - 1] === ';' || selector[selector.length - 1] === '}') {
            return selector;
        }
        return selector.replace(selectorNameMatch, function(selectorName) {
            return idLibrary.get(selectorName, true);
        });
    });

    return file;
};