Expressive code without comments: http://www.frahmbo.com/expressive-code-without-comments/

sample.js

MyApp.factory('ServerUrls', function ($window) {
    function getCurrentPathname() {
        var pathname = $window.location.pathname;
        var hasUsefulPath = (pathname && pathname !== '/');
        if (hasUsefulPath) {
            return pathname;
        }
    }

    function getCurrentHashFragment() {
        var hashFragment = $window.location.hash;
        var hasUsefulHashFragment = (hashFragment && hashFragment !== '#/');
        if (hasUsefulHashFragment) {
            var djangoRedirectSafeHash = '%23';
            return djangoRedirectSafeHash + hashFragment.split('#')[1];
        }
        return '';
    }

    function getLoginUrl(addRedirect) {
        if (addRedirect !== false) {
            addRedirect = true;
        }
        var loginUrl = '/login/';
        var hasUsefulRedirect = (getCurrentPathname() || getCurrentHashFragment());
        if (addRedirect && hasUsefulRedirect) {
            loginUrl += '?next=' + getCurrentPathname() + getCurrentHashFragment();
        }
        return loginUrl;
    }

    return {
        'login': getLoginUrl
    };
});