import typecast from '../string/typecast';
import getQuery from './getQuery';

/**
 * Get query parameter value.
 */
function getParam(url, param, shouldTypecast) {
    const regexp = new RegExp(`(\\?|&)${param}=([^&]*)`); // matches `?param=value` or `&param=value`, value = $2
    const result = regexp.exec(getQuery(url));
    const val = result && result[2] ? result[2] : null;
    return shouldTypecast === false ? val : typecast(val);
}

export default getParam;