<?php
/*
 * ntp_status.widget.php
 *
 * part of pfSense (https://www.pfsense.org)
 * Copyright (c) 2004-2016 Electric Sheep Fencing, LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *    "This product includes software developed by the pfSense Project
 *    for use in the pfSense® software distribution. (http://www.pfsense.org/).
 *
 * 4. The names "pfSense" and "pfSense Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    coreteam@pfsense.org.
 *
 * 5. Products derived from this software may not be called "pfSense"
 *    nor may "pfSense" appear in their names without prior written
 *    permission of the Electric Sheep Fencing, LLC.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *
 * "This product includes software developed by the pfSense Project
 * for use in the pfSense software distribution (http://www.pfsense.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY THE pfSense PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE pfSense PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

$nocsrf = true;

require_once("guiconfig.inc");
require_once("pfsense-utils.inc");
require_once("functions.inc");

require_once("/usr/local/www/widgets/include/ntp_status.inc");

function getServerDateItems($inDate) {
	return date('Y,n,j,G,', $inDate) . intval(date('i', $inDate)) . ',' . intval(date('s', $inDate));
	// year (4-digit),month,day,hours (0-23),minutes,seconds
	// use intval to strip leading zero from minutes and seconds
	// so JavaScript won't try to interpret them in octal
	// (use intval instead of ltrim, which translates '00' to '')
}

function clockTimeString($inDate, $showSeconds) {
	return date($showSeconds ? 'G:i:s' : 'g:i', $inDate) . ' ';
}

if ($_REQUEST['updateme']) {
//this block displays only on ajax refresh
	if (isset($config['system']['ipv6allow'])) {
		$inet_version = "";
	} else {
		$inet_version = " -4";
	}

	exec("/usr/local/sbin/ntpq -pn $inet_version | /usr/bin/tail +3", $ntpq_output);
	$ntpq_counter = 0;
	$stratum_text = gettext("stratum");
	foreach ($ntpq_output as $line) {
		if (substr($line, 0, 1) == "*") {
			//Active NTP Peer
			$line = substr($line, 1);
			$peerinfo = preg_split("/[\s\t]+/", $line);
			if ($peerinfo[2] == "1") {
				$syncsource = $peerinfo[0] . " (" . $stratum_text . " " . $peerinfo[2] . ", " . $peerinfo[1] . ")";
			} else {
				$syncsource = $peerinfo[0] . " (" . $stratum_text . " " . $peerinfo[2] . ")";
			}
			$ntpq_counter++;
		} elseif (substr($line, 0, 1) == "o") {
			//Local PPS Peer
			$line = substr($line, 1);
			$peerinfo = preg_split("/[\s\t]+/", $line);
			$syncsource = $peerinfo[1] . " (" . $stratum_text . " " . $peerinfo[2] . ", PPS)";
			$ntpq_counter++;
		}
	}

	exec("/usr/local/sbin/ntpq -c clockvar $inet_version", $ntpq_clockvar_output);
	foreach ($ntpq_clockvar_output as $line) {
		if (substr($line, 0, 9) == "timecode=") {
			$tmp = explode('"', $line);
			$tmp = $tmp[1];
			if (substr($tmp, 0, 6) == '$GPRMC') {
				$gps_vars = explode(",", $tmp);
				$gps_ok	= ($gps_vars[2] == "A");
				$gps_lat_deg = substr($gps_vars[3], 0, 2);
				$gps_lat_min = substr($gps_vars[3], 2) / 60.0;
				$gps_lon_deg = substr($gps_vars[5], 0, 3);
				$gps_lon_min = substr($gps_vars[5], 3) / 60.0;
				$gps_lat = $gps_lat_deg + $gps_lat_min;
				$gps_lat = $gps_lat * (($gps_vars[4] == "N") ? 1 : -1);
				$gps_lon = $gps_lon_deg + $gps_lon_min;
				$gps_lon = $gps_lon * (($gps_vars[6] == "E") ? 1 : -1);
				$gps_la = $gps_vars[4];
				$gps_lo = $gps_vars[6];
			} elseif (substr($tmp, 0, 6) == '$GPGGA') {
				$gps_vars = explode(",", $tmp);
				$gps_ok	= $gps_vars[6];
				$gps_lat_deg = substr($gps_vars[2], 0, 2);
				$gps_lat_min = substr($gps_vars[2], 2) / 60.0;
				$gps_lon_deg = substr($gps_vars[4], 0, 3);
				$gps_lon_min = substr($gps_vars[4], 3) / 60.0;
				$gps_lat = $gps_lat_deg + $gps_lat_min;
				$gps_lat = $gps_lat * (($gps_vars[3] == "N") ? 1 : -1);
				$gps_lon = $gps_lon_deg + $gps_lon_min;
				$gps_lon = $gps_lon * (($gps_vars[5] == "E") ? 1 : -1);
				$gps_alt = $gps_vars[9];
				$gps_alt_unit = $gps_vars[10];
				$gps_sat = $gps_vars[7];
				$gps_la = $gps_vars[3];
				$gps_lo = $gps_vars[5];
			} elseif (substr($tmp, 0, 6) == '$GPGLL') {
				$gps_vars = explode(",", $tmp);
				$gps_ok	= ($gps_vars[6] == "A");
				$gps_lat_deg = substr($gps_vars[1], 0, 2);
				$gps_lat_min = substr($gps_vars[1], 2) / 60.0;
				$gps_lon_deg = substr($gps_vars[3], 0, 3);
				$gps_lon_min = substr($gps_vars[3], 3) / 60.0;
				$gps_lat = $gps_lat_deg + $gps_lat_min;
				$gps_lat = $gps_lat * (($gps_vars[2] == "N") ? 1 : -1);
				$gps_lon = $gps_lon_deg + $gps_lon_min;
				$gps_lon = $gps_lon * (($gps_vars[4] == "E") ? 1 : -1);
				$gps_la = $gps_vars[2];
				$gps_lo = $gps_vars[4];
			}
		}
	}

	if (isset($config['ntpd']['gps']['type']) && ($config['ntpd']['gps']['type'] == 'SureGPS') && (isset($gps_ok))) {
		//GSV message is only enabled by init commands in services_ntpd_gps.php for SureGPS board
		$gpsport = fopen("/dev/gps0", "r+");
		while ($gpsport) {
			$buffer = fgets($gpsport);
			if (substr($buffer, 0, 6) == '$GPGSV') {
				//echo $buffer."\n";
				$gpgsv = explode(',', $buffer);
				$gps_satview = $gpgsv[3];
				break;
			}
		}
	}
?>

<table id="ntp_status_widget" class="table table-striped table-hover">
	<tr>
		<th><?=gettext('Server Time')?></th>
		<td id="ClockTime"> <!-- ntpStatusClock -->
			<script type="text/javascript">
			//<![CDATA[
			var ntpServerTime = new Date('<?=date_format(date_create(), 'c')?>');
			//]]>
			</script>
			<!-- display initial value before javascript takes over -->
			<?=gmdate('D j Y H:i:s \G\M\T O (T)');?>
		</td>
	</tr>
	<tr>
		<th><?=gettext('Sync Source')?></th>
		<td>
		<?php if ($ntpq_counter == 0): ?>
			<i><?=gettext('No active peers available')?></i>
		<?php else: ?>
			<?=$syncsource;?>
		<?php endif; ?>
		</td>
	</tr>
	<?php if (($gps_ok) && ($gps_lat) && ($gps_lon)): ?>
		<tr>
			<th><?=gettext('Clock location')?></th>
			<td>
				<a target="_gmaps" href="http://maps.google.com/?q=<?=$gps_lat;?>,<?=$gps_lon;?>">
				<?php
				echo sprintf("%.5f", $gps_lat) . " " . $gps_la . ", " . sprintf("%.5f", $gps_lon) . " " . $gps_lo; ?>
				</a>
				<?php if (isset($gps_alt)) {echo " (" . $gps_alt . " " . $gps_alt_unit . " alt.)";} ?>
			</td>
		</tr>
		<?php if (isset($gps_sat) || isset($gps_satview)): ?>
			<tr>
				<th><?=gettext('Satellites')?></th>
				<td>
				<?php
				if (isset($gps_satview)) {echo gettext('in view') . ' ' . intval($gps_satview);}
				if (isset($gps_sat) && isset($gps_satview)) {echo ', ';}
				if (isset($gps_sat)) {echo gettext('in use') . ' ' . $gps_sat;}
				?>
				</td>
			</tr>
		<?php endif; ?>
	<?php endif; ?>
</table>

<?php
	exit;
}
?>
<script type="text/javascript">
//<![CDATA[
function ntpWidgetUpdateFromServer(){
	$.ajax({
		type: 'get',
		url: '/widgets/widgets/ntp_status.widget.php',
		dataFilter: function(raw){
			// We reload the entire widget, strip this block of javascript from it
			return raw.replace(/<script>([\s\S]*)<\/script>/gi, '');
		},
		dataType: 'html',
		success: function(data){
			console.log(data);
			$('#ntp_status_widget').html(data);
		}
	});
}

function ntpWidgetUpdateDisplay(){
	// Javascript handles overflowing
	ntpServerTime.setSeconds(ntpServerTime.getSeconds()+1);

	$('#ntpStatusClock').html(ntpServerTime.toString());
}
//]]>
</script>

<script type="text/javascript">
//<![CDATA[
/* set up variables used to init clock in BODY's onLoad handler;
   should be done as early as possible */
var clockLocalStartTime = new Date();
var clockServerStartTime = new Date(<?php echo(getServerDateItems($gDate))?>);

/* stub functions for older browsers;
   will be overridden by next JavaScript1.2 block */
function clockInit() {
}
//]]>
</script>

<script type="text/javascript">
//<![CDATA[
/*** simpleFindObj, by Andrew Shearer

Efficiently finds an object by name/id, using whichever of the IE,
classic Netscape, or Netscape 6/W3C DOM methods is available.
The optional inLayer argument helps Netscape 4 find objects in
the named layer or floating DIV. */
function simpleFindObj(name, inLayer) {
	return document[name] || (document.all && document.all[name])
		|| (document.getElementById && document.getElementById(name))
		|| (document.layers && inLayer && document.layers[inLayer].document[name]);
}

/*** Beginning of Clock 2.1.2, by Andrew Shearer
See: http://www.shearersoftware.com/software/web-tools/clock/
Redistribution is permitted with the above notice intact.

Client-side clock, based on computed time differential between browser &
server. The server time is inserted by server-side JavaScript, and local
time is subtracted from it by client-side JavaScript while the page is
loading.

Cookies: The local and remote times are saved in cookies named
localClock and remoteClock, so that when the page is loaded from local
cache (e.g. by the Back button) the clock will know that the embedded
server time is stale compared to the local time, since it already
matches its cookie. It can then base the calculations on both cookies,
without reloading the page from the server. (IE 4 & 5 for Windows didn't
respect Response.Expires = 0, so if cookies weren't used, the clock
would be wrong after going to another page then clicking Back. Netscape
& Mac IE were OK.)

Every so often (by default, one hour) the clock will reload the page, to
make sure the clock is in sync (as well as to update the rest of the
page content).

Compatibility: IE 4.x and 5.0, Netscape 4.x and 6.0, Mozilla 1.0. Mac & Windows.

History:  1.0	2000-05-09 GIF-image digits
		  2.0	2000-06-29 Uses text DIV layers (so 4.0 browsers req'd), &
						 cookies to work around Win IE stale-time bug
		  2.1	2002-10-12 Noted Mozilla 1.0 compatibility; released PHP version.
		  2.1.1 2002-10-20 Fixed octal bug in the PHP translation; the number of
						minutes & seconds were misinterpreted when less than 10
		  2.1.2 2003-08-07 The previous fix had introduced a bug when the
						minutes or seconds were exactly 0. Thanks to Man Bui
						for reporting the bug.
*/
var clockIncrementMillis = 1000;
var localTime;
var clockOffset;
var clockExpirationLocal;
var clockShowsSeconds = true;
var clockTimerID = null;

function clockInit(localDateObject, serverDateObject)
{
	var origRemoteClock = parseInt(clockGetCookieData("remoteClock"));
	var origLocalClock = parseInt(clockGetCookieData("localClock"));
	var newRemoteClock = serverDateObject.getTime();
	// May be stale (WinIE); will check against cookie later
	// Can't use the millisec. ctor here because of client inconsistencies.
	var newLocalClock = localDateObject.getTime();
	var maxClockAge = 60 * 60 * 1000;	// get new time from server every 1hr

	if (newRemoteClock != origRemoteClock) {
		// new clocks are up-to-date (newer than any cookies)
		document.cookie = "remoteClock=" + newRemoteClock;
		document.cookie = "localClock=" + newLocalClock;
		clockOffset = newRemoteClock - newLocalClock;
		clockExpirationLocal = newLocalClock + maxClockAge;
		localTime = newLocalClock;	// to keep clockUpdate() happy
	} else if (origLocalClock != origLocalClock) {
		// error; localClock cookie is invalid (parsed as NaN)
		clockOffset = null;
		clockExpirationLocal = null;
	} else {
		// fall back to clocks in cookies
		clockOffset = origRemoteClock - origLocalClock;
		clockExpirationLocal = origLocalClock + maxClockAge;
		localTime = origLocalClock;
		// so clockUpdate() will reload if newLocalClock
		// is earlier (clock was reset)
	}
	/* Reload page at server midnight to display the new date,
	   by expiring the clock then */
	var nextDayLocal = (new Date(serverDateObject.getFullYear(),
			serverDateObject.getMonth(),
			serverDateObject.getDate() + 1)).getTime() - clockOffset;
	if (nextDayLocal < clockExpirationLocal) {
		clockExpirationLocal = nextDayLocal;
	}
}

function clockOnLoad()
{
	clockUpdate();
}

function clockOnUnload() {
	clockClearTimeout();
}

function clockClearTimeout() {
	if (clockTimerID) {
		clearTimeout(clockTimerID);
		clockTimerID = null;
	}
}

function clockToggleSeconds()
{
	clockClearTimeout();
	if (clockShowsSeconds) {
		clockShowsSeconds = false;
		clockIncrementMillis = 60000;
	} else {
		clockShowsSeconds = true;
		clockIncrementMillis = 1000;
	}
	clockUpdate();
}

function clockTimeString(inHours, inMinutes, inSeconds) {
	return inHours
	+ (inMinutes < 10 ? ":0" : ":") + inMinutes
	+ (inSeconds < 10 ? ":0" : ":") + inSeconds;
}

function clockDisplayTime(inHours, inMinutes, inSeconds) {
	clockWriteToDiv("ClockTime", clockTimeString(inHours, inMinutes, inSeconds));
}

function clockWriteToDiv(divName, newValue) // APS 6/29/00
{
	var divObject = simpleFindObj(divName);
	newValue =	newValue + ' (' + new Date().toString().match(/([A-Z]+[\+-][0-9]+)/)[1] + ')';
	if (divObject && divObject.innerHTML) {
		divObject.innerHTML = newValue;
	} else if (divObject && divObject.document) {
		divObject.document.writeln(newValue);
		divObject.document.close();
	}
	// else divObject wasn't found; it's only a clock, so don't bother complaining
}

function clockGetCookieData(label) {
	/* find the value of the specified cookie in the document's
	semicolon-delimited collection. For IE Win98 compatibility, search
	from the end of the string (to find most specific host/path) and
	don't require "=" between cookie name & empty cookie values. Returns
	null if cookie not found. One remaining problem: Under IE 5 [Win98],
	setting a cookie with no equals sign creates a cookie with no name,
	just data, which is indistinguishable from a cookie with that name
	but no data but can't be overwritten by any cookie with an equals
	sign. */
	var c = document.cookie;
	if (c) {
		var labelLen = label.length, cEnd = c.length;
		while (cEnd > 0) {
			var cStart = c.lastIndexOf(';',cEnd-1) + 1;
			/* bug fix to Danny Goodman's code: calculate cEnd, to
			prevent walking the string char-by-char & finding cookie
			labels that contained the desired label as suffixes */
			// skip leading spaces
			while (cStart < cEnd && c.charAt(cStart)==" ") {
				cStart++;
			}
			if (cStart + labelLen <= cEnd && c.substr(cStart,labelLen) == label) {
				if (cStart + labelLen == cEnd) {
					return ""; // empty cookie value, no "="
				} else if (c.charAt(cStart+labelLen) == "=") {
					// has "=" after label
					return unescape(c.substring(cStart + labelLen + 1,cEnd));
				}
			}
			cEnd = cStart - 1;	// skip semicolon
		}
	}
	return null;
}

/* Called regularly to update the clock display as well as onLoad (user
   may have clicked the Back button to arrive here, so the clock would need
   an immediate update) */
function clockUpdate()
{
	var lastLocalTime = localTime;
	localTime = (new Date()).getTime();

	// Sanity-check the diff. in local time between successive calls;
	//	 reload if user has reset system clock
	if (clockOffset == null) {
		clockDisplayTime(null, null, null);
	} else if (localTime < lastLocalTime || clockExpirationLocal < localTime) {
		// Clock expired, or time appeared to go backward (user reset
		// the clock). Reset cookies to prevent infinite reload loop if
		// server doesn't give a new time.
		document.cookie = 'remoteClock=-';
		document.cookie = 'localClock=-';
		location.reload();		// will refresh time values in cookies
	} else {
		// Compute what time would be on server
		var serverTime = new Date(localTime);
		clockDisplayTime(serverTime.getHours(), serverTime.getMinutes(),
			serverTime.getSeconds());

		// Reschedule this func to run on next even clockIncrementMillis boundary
		clockTimerID = setTimeout("clockUpdate()",
			clockIncrementMillis - (serverTime.getTime() % clockIncrementMillis));
	}
}

/*** End of Clock ***/
window.onload=clockInit(clockLocalStartTime, clockServerStartTime);clockOnLoad();
window.onunload=clockOnUnload()
clockUpdate();
//]]>
</script>

<table id="ntpstatus" class="table table-striped table-hover">
	<tbody>
		<tr>
			<td>
				<?=gettext('Updating...')?>
			</td>
		</tr>
	</tbody>
</table>

<script type="text/javascript">
//<![CDATA[
	function ntp_getstatus() {
		scroll(0,0);
		var url = "/widgets/widgets/ntp_status.widget.php";
		var pars = 'updateme=yes';
		$.ajax(
			url,
			{
				type: 'get',
				data: pars,
				complete: ntpstatuscallback
			});
		// Refresh the status every 1 minute
		setTimeout('ntp_getstatus()', 1*60*1000);
	}

	function ntpstatuscallback(transport) {
		// The server returns formatted html code
		var responseStringNtp = transport.responseText
		$('#ntpstatus').prop('innerHTML',responseStringNtp);
	}
	// Do the first status check 1 second after the dashboard opens
	setTimeout('ntp_getstatus()', 1000);
//]]>
</script>
