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track.php
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track.php
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<?php
echo '<?xml version="1.0" encoding="UTF-8"?><result><message>';
$res_msg = 'something went wrong :)';
$gpxFileName = "./data/".date('Y-m-d') . ".gpx";
$lat = $_GET["lat"];
$lon = $_GET["lon"];
$alt = $_GET["alt"];
$speed = $_GET["speed"];
$bearing = $_GET["bearing"];
$time = $_GET["time"];
//echo 'Zapis do: ' . $gpxFileName . ', lat:' . $lat . ',lon: ' . $lon . ', time: ' . $time;
if ((!is_null($lat)) && (!is_null($lon)) && (!is_null($time))) {
//append new points to existing file
if (file_exists($gpxFileName))
{
$dom = new DOMDocument();
if ($dom->load($gpxFileName))
{
$trackSeqs = $dom->getElementsByTagName('trkseg');
if (!is_null($trackSeqs) && $trackSeqs->length > 0)
{
$lastTrkseq = $trackSeqs->item(($trackSeqs->length - 1));
$lastTrkseq->appendChild(getTrackPoint($dom,$lat,$lon,$alt,$speed,$bearing,$time));
if ($dom->save($gpxFileName) > 0)
{
$res_msg = "new track point saved";
}
}
}
} else //create new file
{
$dom = new DOMDocument("1.0","UTF-8");
$dom->preservWhiteSpace = false;
$dom->formatOutput = false;
$gpx = $dom->createElement("gpx");
$gpx->setAttribute("xmlns","http://www.topografix.com/GPX/1/1");
$gpx->setAttribute("version","1.1");
$gpx->setAttribute("creator","svoboda.biz");
$trk = $dom->createElement("trk");
$trkseq = $dom->createElement("trkseg");
$trkseq->appendChild(getTrackPoint($dom,$lat,$lon,$alt,$speed,$bearing,$time));
$trk->appendChild($trkseq);
$gpx->appendChild($trk);
$dom->appendChild($gpx);
if ($dom->save($gpxFileName) > 0)
{
$res_msg = "new GPX file created";
}
}
} else
{
$res_msg = "missing some parameters";
}
echo $res_msg.'</message></result>';
//get trackpoint element from request parameters
function getTrackPoint(&$dom,&$lat,&$lon,&$alt,&$speed,&$bearing,&$time) {
$newTrackPoint = $dom->createElement("trkpt");
$newTrackPoint->setAttribute("lat",$lat);
$newTrackPoint->setAttribute("lon",$lon);
$trackPointTime = $dom->createElement("ele",$alt);
$trackPointTime = $dom->createElement("speed",$speed);
$trackPointTime = $dom->createElement("course",$bearing);
$trackPointTime = $dom->createElement("time",$time);
$newTrackPoint->appendChild($trackPointTime);
return $newTrackPoint;
}
?>