script.js

$(document).ready(function () {
  setCurrentTime();
  setInterval(function(){
    setCurrentTime();
  },10*1000);

  var username = getCookie('username');
  //rudimentary javascript to check cookie
  if(username){
    $('.greeting').css('display','inline-block');
    $('.user-name').css('display','none');
    $('.greeting').html(`Hello <span class="stored-name">${username}</span>.`);
  }else{
    $('.greeting').css('display','none');
    $('.user-name').css('display','inline-block');
    $('.greeting').html(`What's your name?`);
  }

  $('.user-name').keypress(function(e) {
    if(e.which == 13) {
      var username = e.target.value;
      if(!username) return;
      $('.user-name').fadeOut(function(){
        $('.greeting').html(`Hello ${username}.`);
        $('.greeting').fadeIn(function(){
          setCookie('username', username,365);
        });
      });
    }
  });

});

function setCurrentTime(){
  var now = new Date();
  $('.time').html(now.getHours()+":"+now.getMinutes())
  $('.date').html(now.toLocaleDateString('en-US', { weekday: 'short', year: 'numeric', month: 'short', day: 'numeric' }));
}
function setCookie(cname,cvalue,exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = "expires=" + d.toGMTString();
    document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
    var name = cname + "=";
    var decodedCookie = decodeURIComponent(document.cookie);
    var ca = decodedCookie.split(';');
    for(var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') {
            c = c.substring(1);
        }
        if (c.indexOf(name) == 0) {
            return c.substring(name.length, c.length);
        }
    }
    return "";
}

function newimage(keyword){
  if(!ACCESS_KEY){
    alert("Please update your access key");
    return;
  }
  var url = `https://api.unsplash.com/search/photos?query=${keyword}&per_page=20&orientation=landscape&client_id=${ACCESS_KEY}`;
  $.get(url,function(data){
    var picture_url = data.results[0].urls.raw;
    setCookie("picture",picture_url);
    $('body').css('background-image',`url(${picture_url})`);
  });
}