Team:TP-CC San Diego/assets/js/livereload.js

(function(){

var script = document.getElementById('bs-live-reload'); var sseport = script.getAttribute('data-sseport'); var lastchange = script.getAttribute('data-lastchange');

var pageIsVisible = true; var needsReload = false;

if('EventSource' in window){ var es = new EventSource("http://" + location.hostname + ":" + sseport + "/"); es.onmessage = function(msg){

var obj = JSON.parse(msg.data);

if(obj.type == 'full'){

if(pageIsVisible){ window.location.reload(); } else{ needsReload = true; }

return; }

if(obj.type == 'css'){

$('link').each(function(){

var elem = $(this);

var parser = document.createElement('a'); parser.href = elem.attr('href');

for(var i = 0; i < obj.targets.length; i++){ var target = '/' + obj.targets[i];

if(decodeURI(parser.pathname) == target){

if(pageIsVisible){ elem.attr('href', target + '?r' + Math.random()); } else{ needsReload = true; } }

}

});

}

} } else { setInterval(checkForChanges, 2000); }

function checkForChanges(){

var req = new XMLHttpRequest();

req.addEventListener("load", function(){

if(lastchange != this.responseText){ window.location.reload(); }

});

req.open('GET', '/bs-lastchange', true); req.send();

}

document.addEventListener("visibilitychange", function(){

if(document.hidden){ pageIsVisible = false; } else{ pageIsVisible = true;

if(needsReload){ window.location.reload(); } } });

})();