/**
* Minify css files.
* @function task.worker.minifyCssFiles
* @param {object} config - Work configuration.
* @param {string} config.srcDir - Source css directory.
* @param {string} config.ignore - Ignore css pattern. Glob.
* @param {string} config.pattern - Source css file pattern. Glob.
* @param {string} config.destDir - Destination html directory.
* @param {function} callback - Callback when done.
* @author Taka Okunishi
*
*/
var debug = require('./_debug'),
_convertDirectory = require('./_convert_directory'),
minify = require('../../lib/minify'),
minifyCssFile = minify.minifyCssFile;
var _minifyFiles = require('./_minify_files');
exports = module.exports = function (config, callback) {
_minifyFiles(config, [/\.css$/, '.min.css'], minifyCssFile, callback);
};