X-Git-Url: http://git.ieval.ro/?a=blobdiff_plain;f=js%2F90-timers.js;h=c9b095039873c84b3f886eaaac06c2b48ee510d7;hb=2a1a09062f8d5081a318b995e1a0459755716bb5;hp=d439299ebe6d562f3d47cab5883f4f986589ce34;hpb=b0b9b0278598ba852c4c82fef94b264766d9cb50;p=plack-app-gruntmaster.git

diff --git a/js/90-timers.js b/js/90-timers.js
index d439299..c9b0950 100644
--- a/js/90-timers.js
+++ b/js/90-timers.js
@@ -1,8 +1,10 @@
+let offset = 0;
+
 function update_timer(timer){
 	var start = parseInt(timer.dataset.start);
 	var stop  = parseInt(timer.dataset.stop);
 	var value = parseInt(timer.dataset.value);
-	var now   = Math.floor(Date.now() / 1000);
+	var now   = Math.floor(Date.now() / 1000) + offset;
 
 	var left = stop - now;
 	var total = stop - start;
@@ -23,7 +25,19 @@ function update_timer(timer){
 	}
 }
 
-$(() => $('.timer').each(item => {
-	update_timer(item);
-	setInterval(() => update_timer(item), 1000);
-}));
+$(() => {
+	$('.timer').each(item => {
+		update_timer(item);
+		setInterval(() => update_timer(item), 1000);
+	});
+	if($('.timer').length > 0) {
+		let xhr = new XMLHttpRequest();
+		xhr.open('HEAD', '/');
+		xhr.onload = () => {
+			let srvtime = Date.parse(xhr.getResponseHeader('Date'));
+			offset = Math.ceil((srvtime - Date.now()) / 1000);
+			console.log("Offset from server: " + offset);
+		};
+		xhr.send();
+	}
+});