Notify me OAuth2.0 draft updates every morning

notify_oauth_draft.js

// Initializing variables

var dayBaseTime = 5;
var oauthDraftUrl = 'http://tools.ietf.org/wg/oauth/draft-ietf-oauth-v2/';

// End of variables initializing

var isNull = function(x){
    return (x === null || x === undefined);
};
var trim = function(str){
    return str.replace(/(^\s*|\s*$)/, '');
};
var getToday = function(date){
    var today = new Date()
      , year = today.getFullYear()
      , month = today.getMonth() + 1
      , day = today.getDate()
      , hour = today.getHours()
      ;

    if(hour < dayBaseTime){ --day; }
    return('' + year + month + day);
};

var notify = function(title, body, fn){
    var n = device.notifications.createNotification(title);
    if(! isNull(body)){ n.content = body; }
    if(! isNull(fn)){ n.on('click', fn); }
    n.show();
};

console.log("Started script: Notify me OAuth2.0 draft updates every morning.");

device.screen.on('unlock', function(){
    var lastUnlocked = device.localStorage.getItem('lastUnlocked');
    var lastDraft = device.localStorage.getItem('lastDraft');
    var today = getToday();

    if(isNull(lastUnlocked) || lastUnlocked !== today){
        device.ajax({
            url: oauthDraftUrl
          , type: 'GET'
        }, function(body, status, response){
            var lines = body.split(/[\r\n]+/);
            var i = 0, len = lines.length;
            var mode = 0;

            for(i = 0; i < len; ++i){
                if(mode === 0){
                    if(lines[i].indexOf('Working documents:') !== -1){
                        ++mode;
                    }
                } else if(mode === 1){
                    if(lines[i].indexOf('<td valign="top" class="date">') !== -1){
                        break;
                    }
                }
            }

            var latestUpdate = trim(lines[i].replace(/<.+?>/g, ''));
            console.log("oauth draft compare: [" + lastDraft + "] [" + latestUpdate + "]");
            if(isNull(lastDraft) || latestUpdate !== lastDraft){
                notify("NEW OAUTH2.0 DRAFT EXISTS!!!", "Latest version: " + latestUpdate, function(){
                    device.browser.launch(oauthDraftUrl);
                });
                device.localStorage.setItem('lastDraft', latestUpdate);
            }

        }, function(status, response){
            console.error('error', 'error: ' + status);
        });

        // set last unlocked date
        device.localStorage.setItem('lastUnlocked', today);
    }
});

console.log("Completed script: Notify me OAuth2.0 draft updates every morning.");