1 files changed, 129 insertions, 0 deletions
diff --git a/src/clock.js b/src/clock.js
new file mode 100644
index 0000000..59390d8
--- /dev/null
+++ b/src/clock.js
@@ -0,0 +1,129 @@
+/*
+ *  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);