/**
 * A Series of utility functions
 */

/**
 * returns the extension of a file for the given filename.
 * @param  {String} filename The name of the file.
 * @return {String}          A string that represents the file-extension.
 */
exports.getExtension = function (filename) {
    if (!filename) return null;
    try {
        let exts = filename.match(/\.[a-z]+/g); // get the extension by using regex
        if (exts) return exts[exts.length - 1]; // return the found extension
        else return null; // return null if no extension could be found
    } catch (error) {
        console.error(error);
        return null;
    }
}