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-rw-r--r--src/clock.js129
1 files changed, 129 insertions, 0 deletions
diff --git a/src/clock.js b/src/clock.js
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index 0000000..59390d8
--- /dev/null
+++ b/src/clock.js
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+/*
+ * rhrdweb
+ *
+ * Copyright (C) 2016 Christian Pointner <equinox@helsinki.at>
+ *
+ * This file is part of rhrdweb.
+ *
+ * rhrdweb is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * rhrdweb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with rhrdweb. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+'use strict';
+
+function Clock() {
+ this.last_message = { t1: 0, t2: 0, t3: 0, t4: 0, tz_offset: 3600 };
+ this.clock_offset = 0;
+ this.clock_rtt = 0;
+ this.state = 'NEW';
+
+ this.now = function() {
+ return new Date(this.getRDTimeMS());
+ }
+
+ this.getRDTimeMS = function() {
+ return (+new Date()) + (this.last_message.tz_offset * 1000) + this.clock_offset;
+ }
+
+ this.redraw = function() {
+ var rdtime_ms = this.getRDTimeMS()
+
+ var rdtime = new Date(rdtime_ms);
+ var date_str = weekday_short[rdtime.getUTCDay()] + ', ';
+ date_str += rdtime.getUTCDate() + '.' + (rdtime.getUTCMonth() + 1) + '.' + rdtime.getUTCFullYear();
+
+ var time_str = (rdtime.getUTCHours() > 9 ? ' ' : ' 0') + rdtime.getUTCHours();
+ time_str += (rdtime.getUTCMinutes() > 9 ? ':' : ':0') + rdtime.getUTCMinutes();
+ time_str += (rdtime.getUTCSeconds() > 9 ? ':' : ':0') + rdtime.getUTCSeconds();
+
+ console.log([date_str, time_str, get_rd_week(rdtime_ms)])
+ }
+
+ this.ntp_update = function(event) {
+ var t4 = (+new Date());
+
+ var msg = JSON.parse(event.data);
+ msg.t4 = t4;
+ this.last_message = msg;
+ this.clock_offset = ((msg.t2 - msg.t1) + (msg.t3 - msg.t4)) / 2;
+ this.clock_rtt = (msg.t4 - msg.t1) - (msg.t3 - msg.t2);
+// console.log('got new ntp message from rhrdtime (rtt=' + this.clock_rtt + ' ms): new offset = ' + this.clock_offset + ' ms');
+ }
+
+ this.ntp_request = function() {
+ this.sock.send(JSON.stringify({ t1: (+new Date()), t2: 0, t3: 0, t4: 0, tz_offset: 0, week: 0 }));
+ }
+
+ this.sock_onopen = function() {
+// console.log('clock websocket connection established');
+ this.state = 'CONNECTED';
+ this.ntp_request();
+ this.interval_request = setInterval(this.ntp_request.bind(this), 2000);
+ }
+
+ this.sock_onclose = function(event) {
+ if(this.state == 'STOPPED') {
+ delete this.sock;
+ } else {
+// console.log('clock websocket closed with code ' + event.code + ', trying reconnect...');
+ clearInterval(this.interval_request);
+ delete this.interval_request;
+ this.sock.close();
+ delete this.sock;
+ setTimeout(this.connect.bind(this), 1000);
+ this.state = 'RECONNECTING';
+ }
+ }
+
+ this.connect = function() {
+ this.sock = new WebSocket('wss://' + window.location.host + '/ntp');
+ this.sock.onmessage = this.ntp_update.bind(this);
+ this.sock.onopen = this.sock_onopen.bind(this);
+ this.sock.onclose = this.sock_onclose.bind(this);
+ this.state = 'CONNECTING';
+ }
+
+ this.start = function() {
+ this.connect();
+ this.interval_redraw = setInterval(this.redraw.bind(this), 200);
+ }
+
+ this.stop = function() {
+ this.state = 'STOPPED';
+ clearInterval(this.interval_redraw);
+ delete this.interval_redraw;
+ clearInterval(this.interval_request);
+ delete this.interval_request;
+ this.sock.close();
+ }
+}
+
+var clock = new Clock();
+clock.start();
+
+
+
+var ClockView = React.createClass({
+ render: function() {
+ return (
+ <p>
+ Hello, <input type="text" placeholder="Your name here" />!
+ It is {this.props.date.toTimeString()}
+ </p>
+ );
+ }
+});
+
+setInterval(function() {
+ ReactDOM.render(<ClockView date={new Date()} />, document.getElementById('clock'));
+}, 500);