From 63b23993665aaa966bc328c5bfbc979760cbb5fe Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Thu, 19 Feb 2015 22:08:39 +0200
Subject: [PATCH] Make tracker less automatic and more resource-friendly

---
 js/90-tracker.js | 11 +++++++++++
 tmpl/pb_entry.en |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/js/90-tracker.js b/js/90-tracker.js
index 2f8271c..16b9d87 100644
--- a/js/90-tracker.js
+++ b/js/90-tracker.js
@@ -77,20 +77,30 @@
 		$('#tracker_tracking').removeClass('hidden');
 		$('#tracker_form').addClass('hidden');
 		update_tracker();
+		var lastfetch = localStorage.getItem('tracker_lastfetch');
+		if(Date.now() - lastfetch > 60 * 10 * 1000)
+			refresh_tracker();
+	}
+
+	function refresh_tracker(){
+		var user = localStorage.getItem('tracker_username');
 		var xhr = new XMLHttpRequest();
 		xhr.open('GET', '/us/' + user + '?format=json');
 		xhr.onload = function () {
 			localStorage.setItem('tracker_data', this.responseText);
+			localStorage.setItem('tracker_lastfetch', Date.now());
 			update_tracker();
 		};
 		xhr.send();
 	}
+	window.refresh_tracker = refresh_tracker;
 	window.start_tracking = start_tracking;
 
 	function stop_tracking(){
 		clean_tracker();
 		localStorage.removeItem('tracker_username');
 		localStorage.removeItem('tracker_data');
+		localStorage.removeItem('tracker_lastfetch');
 		$('#tracker_tracking').addClass('hidden');
 		$('#tracker_form').removeClass('hidden');
 	}
@@ -100,6 +110,7 @@
 		$('#tracker_button').on('click', function() { start_tracking($('#tracker_username').val()) });
 		$('#tracker_stop').on('click', stop_tracking);
 		$('#track_user').on('click', function() { stop_tracking(); start_tracking($(this).data('user')) });
+		$('#submitform').on('submit', function() { localStorage.removeItem('tracker_lastfetch') });
 
 		if(localStorage.getItem('tracker_username'))
 			start_tracking(localStorage.getItem('tracker_username'));
diff --git a/tmpl/pb_entry.en b/tmpl/pb_entry.en
index 1518841..be31a1b 100644
--- a/tmpl/pb_entry.en
+++ b/tmpl/pb_entry.en
@@ -24,7 +24,7 @@ To submit solutions to this problem, please visit the problem <a href="/pb/id">o
 </div>
 
 <div id="submit">
-<form action="/action/submit" method="POST" enctype="multipart/form-data" role="form">
+<form id="submitform" action="/action/submit" method="POST" enctype="multipart/form-data" role="form">
 <input type="hidden" name="problem" value="problem_id">
 <input type="hidden" name="contest" value="contest_id">
 
-- 
2.39.2