Papershift overtime calculator (paste in console)

papershift-overtime.js

(function getOvertime(){
    const padLeftTwo = str => ('' + str).length === 1 ? '0' + str : str;
    const now = new Date();
    const today = now.getFullYear() + '' + padLeftTwo(now.getMonth() + 1) + '' + padLeftTwo(now.getDate());
    const days = {};
    
    $('#time_trackings_list .entry').each((i, el) => {
        const dayKey = $(el).find('.day span').text().slice(0,8);
        const dayHours = parseFloat($(el).find('.netto_time').text().replace(' h', ''));

        // don't count today
        if(dayKey === today){ return; }

        if(!days[dayKey]){
            days[dayKey] = 0;
        }

        days[dayKey] += dayHours;
    });

    const hoursShould = Object.keys(days).length * 8;
    const hoursAre = Object.values(days).reduce((mem, val) => mem + val);

    return hoursAre - hoursShould;
})()