wp-gpx-maps/wp-gpx-maps_utils.php

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<?php
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require_once("wp-gpx-maps_utils_nggallery.php");
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function sitePath()
{
return substr(substr(__FILE__, 0, strrpos(__FILE__,'wp-content')), 0, -1);
// $uploadsPath = substr($uploadsPath, 0, -1);
}
function gpxFolderPath()
{
$upload_dir = wp_upload_dir();
$uploadsPath = $upload_dir['basedir'];
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if ( current_user_can('manage_options') ){
$ret = $uploadsPath.DIRECTORY_SEPARATOR."gpx";
}
else if ( current_user_can('publish_posts') ) {
global $current_user;
get_currentuserinfo();
$ret = $uploadsPath.DIRECTORY_SEPARATOR."gpx".DIRECTORY_SEPARATOR.$current_user->user_login;
}
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return str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $ret);
}
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function gpxCacheFolderPath()
{
$upload_dir = wp_upload_dir();
$uploadsPath = $upload_dir['basedir'];
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$ret = $uploadsPath.DIRECTORY_SEPARATOR."gpx".DIRECTORY_SEPARATOR."~cache";
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return str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $ret);
}
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function relativeGpxFolderPath()
{
$sitePath = sitePath();
$realGpxPath = gpxFolderPath();
$ret = str_replace($sitePath,'',$realGpxPath).DIRECTORY_SEPARATOR;
return str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $ret);
}
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function recursive_remove_directory($directory, $empty=FALSE)
{
if(substr($directory,-1) == '/')
{
$directory = substr($directory,0,-1);
}
if(!file_exists($directory) || !is_dir($directory))
{
return FALSE;
}elseif(is_readable($directory))
{
$handle = opendir($directory);
while (FALSE !== ($item = readdir($handle)))
{
if($item != '.' && $item != '..')
{
$path = $directory.'/'.$item;
if(is_dir($path))
{
recursive_remove_directory($path);
}else{
unlink($path);
}
}
}
closedir($handle);
if($empty == FALSE)
{
if(!rmdir($directory))
{
return FALSE;
}
}
}
return TRUE;
}
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function getPoints($gpxPath,$gpxOffset = 10, $donotreducegpx)
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{
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$points = array();
$dist=0;
$lastLat=0;
$lastLon=0;
$lastEle=0;
$lastOffset=0;
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if (file_exists($gpxPath))
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{
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$points = @parseXml($gpxPath, $gpxOffset);
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}
else
{
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echo "File $gpxPath not found!";
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}
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// reduce the points to around 200 to speedup
if ( $donotreducegpx != true)
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{
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$count=sizeof($points->lat);
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if ($count>200)
{
$f = round($count/200);
if ($f>1)
for($i=$count;$i>0;$i--)
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if ($i % $f != 0 && $points->lat[$i] != null)
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{
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unset($points->dt[$i]);
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unset($points->lat[$i]);
unset($points->lon[$i]);
unset($points->ele[$i]);
unset($points->dist[$i]);
unset($points->speed[$i]);
unset($points->hr[$i]);
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unset($points->cad[$i]);
unset($points->grade[$i]);
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}
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}
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}
return $points;
}
function parseXml($filePath, $gpxOffset)
{
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$points = null;
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$points->dt = array();
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$points->lat = array();
$points->lon = array();
$points->ele = array();
$points->dist = array();
$points->speed = array();
$points->hr = array();
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$points->cad = array();
$points->grade = array();
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$points->maxTime = 0;
$points->minTime = 0;
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$points->maxEle = 0;
$points->minEle = 0;
$points->totalEleUp = 0;
$points->totalEleDown = 0;
$points->avgSpeed = 0;
$points->totalLength = 0;
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$gpx = simplexml_load_file($filePath);
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if($gpx === FALSE)
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return;
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$gpx->registerXPathNamespace('10', 'http://www.topografix.com/GPX/1/0');
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$gpx->registerXPathNamespace('11', 'http://www.topografix.com/GPX/1/1');
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$gpx->registerXPathNamespace('gpxtpx', 'http://www.garmin.com/xmlschemas/TrackPointExtension/v1');
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$nodes = $gpx->xpath('//trk | //10:trk | //11:trk');
//normal gpx
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if ( count($nodes) > 0 )
{
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foreach($nodes as $_trk)
{
$trk = simplexml_load_string($_trk->asXML());
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$trk->registerXPathNamespace('10', 'http://www.topografix.com/GPX/1/0');
$trk->registerXPathNamespace('11', 'http://www.topografix.com/GPX/1/1');
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$trk->registerXPathNamespace('gpxtpx', 'http://www.garmin.com/xmlschemas/TrackPointExtension/v1');
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$trkpts = $trk->xpath('//trkpt | //10:trkpt | //11:trkpt');
$lastLat = 0;
$lastLon = 0;
$lastEle = 0;
$lastTime = 0;
//$dist = 0;
$lastOffset = 0;
$speedBuffer = array();
foreach($trkpts as $trkpt)
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{
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$lat = $trkpt['lat'];
$lon = $trkpt['lon'];
$ele = $trkpt->ele;
$time = $trkpt->time;
$speed = (float)$trkpt->speed;
$hr = 0;
$cad = 0;
$grade = 0;
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if (isset($trkpt->extensions))
{
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$trkpt->registerXPathNamespace('gpxtpx', 'http://www.garmin.com/xmlschemas/TrackPointExtension/v1');
$_hr = @$trkpt->xpath('extensions/gpxtpx:TrackPointExtension/gpxtpx:hr/text() | extensions/TrackPointExtension/hr/text()');
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if ($_hr)
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{
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foreach ($_hr as $node) {
$hr = (float)$node;
}
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}
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$_cad = @$trkpt->xpath('extensions/gpxtpx:TrackPointExtension/gpxtpx:cad/text() | extensions/TrackPointExtension/cad/text()');
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if ($_cad)
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{
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foreach ($_cad as $node) {
$cad = (float)$node;
}
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}
}
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if ($lastLat == 0 && $lastLon == 0)
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{
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//Base Case
array_push($points->dt, strtotime($time));
array_push($points->lat, (float)$lat);
array_push($points->lon, (float)$lon);
array_push($points->ele, (float)round($ele,2));
array_push($points->dist, (float)round($dist,2));
array_push($points->speed, 0);
array_push($points->hr, $hr);
array_push($points->cad, $cad);
array_push($points->grade, $grade);
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$lastLat=$lat;
$lastLon=$lon;
$lastEle=$ele;
$lastTime=$time;
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}
else
{
//Normal Case
$offset = calculateDistance((float)$lat, (float)$lon, (float)$ele, (float)$lastLat, (float)$lastLon, (float)$lastEle);
$dist = $dist + $offset;
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$points->totalLength = $dist;
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if ($speed == 0)
{
$datediff = (float)my_date_diff($lastTime,$time);
if ($datediff>0)
{
$speed = $offset / $datediff;
}
}
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if ($ele != 0 && $lastEle != 0)
{
$deltaEle = (float)($ele - $lastEle);
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if ((float)$ele > (float)$lastEle)
{
$points->totalEleUp += $deltaEle;
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}
else
{
$points->totalEleDown += $deltaEle;
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}
$grade = $deltaEle / $offset * 100;
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}
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array_push($speedBuffer, $speed);
if (((float) $offset + (float) $lastOffset) > $gpxOffset)
{
//Bigger Offset -> write coordinate
$avgSpeed = 0;
foreach($speedBuffer as $s)
{
$avgSpeed += $s;
}
$avgSpeed = $avgSpeed / count($speedBuffer);
$speedBuffer = array();
$lastOffset=0;
array_push($points->dt, strtotime($time));
array_push($points->lat, (float)$lat );
array_push($points->lon, (float)$lon );
array_push($points->ele, (float)round($ele, 2) );
array_push($points->dist, (float)round($dist, 2) );
array_push($points->speed, (float)round($avgSpeed, 1) );
array_push($points->hr, $hr);
array_push($points->cad, $cad);
array_push($points->grade, (float)round($grade, 2) );
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}
else
{
//Smoller Offset -> continue..
$lastOffset = (float) $lastOffset + (float) $offset ;
}
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}
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$lastLat=$lat;
$lastLon=$lon;
$lastEle=$ele;
$lastTime=$time;
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}
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array_push($points->dt, null);
array_push($points->lat, null);
array_push($points->lon, null);
array_push($points->ele, null);
array_push($points->dist, null);
array_push($points->speed, null);
array_push($points->hr, null);
array_push($points->cad, null);
array_push($points->grade, null);
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unset($trkpts);
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}
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unset($nodes);
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try {
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array_pop($points->dt, null);
array_pop($points->lat, null);
array_pop($points->lon, null);
array_pop($points->ele, null);
array_pop($points->dist, null);
array_pop($points->speed, null);
array_pop($points->hr, null);
array_pop($points->cad, null);
array_pop($points->grade, null);
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$_time = array_filter($points->dt);
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$_ele = array_filter($points->ele);
$_dist = array_filter($points->dist);
$_speed = array_filter($points->speed);
$points->maxEle = max($_ele);
$points->minEle = min($_ele);
$points->totalLength = max($_dist);
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$points->maxTime = max($_time);
$points->minTime = min($_time);
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$points->avgSpeed = array_sum($_speed) / count($_speed);
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} catch (Exception $e) { }
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}
else
{
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// gpx garmin case
$gpx->registerXPathNamespace('gpxx', 'http://www.garmin.com/xmlschemas/GpxExtensions/v3');
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$nodes = $gpx->xpath('//gpxx:rpt');
if ( count($nodes) > 0 )
{
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$lastLat = 0;
$lastLon = 0;
$lastEle = 0;
$dist = 0;
$lastOffset = 0;
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// Garmin case
foreach($nodes as $rpt)
{
$lat = $rpt['lat'];
$lon = $rpt['lon'];
if ($lastLat == 0 && $lastLon == 0)
{
//Base Case
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array_push($points->lat, (float)$lat );
array_push($points->lon, (float)$lon );
array_push($points->ele, 0 );
array_push($points->dist, 0 );
array_push($points->speed, 0 );
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array_push($points->hr, 0 );
array_push($points->cad, 0 );
array_push($points->grade, 0 );
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$lastLat=$lat;
$lastLon=$lon;
}
else
{
//Normal Case
$offset = calculateDistance($lat, $lon, 0,$lastLat, $lastLon, 0);
$dist = $dist + $offset;
if (((float) $offset + (float) $lastOffset) > $gpxOffset)
{
//Bigger Offset -> write coordinate
$lastOffset=0;
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array_push($points->lat, (float)$lat );
array_push($points->lon, (float)$lon );
array_push($points->ele, 0 );
array_push($points->dist, 0 );
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array_push($points->speed, 0 );
array_push($points->hr, 0 );
array_push($points->cad, 0 );
array_push($points->grade, 0 );
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}
else
{
//Smoller Offset -> continue..
$lastOffset= (float) $lastOffset + (float) $offset;
}
}
$lastLat=$lat;
$lastLon=$lon;
}
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unset($nodes);
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}
else
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{
//gpx strange case
$nodes = $gpx->xpath('//rtept | //10:rtept | //11:rtept');
if ( count($nodes) > 0 )
{
$lastLat = 0;
$lastLon = 0;
$lastEle = 0;
$dist = 0;
$lastOffset = 0;
// Garmin case
foreach($nodes as $rtept)
{
$lat = $rtept['lat'];
$lon = $rtept['lon'];
if ($lastLat == 0 && $lastLon == 0)
{
//Base Case
array_push($points->lat, (float)$lat );
array_push($points->lon, (float)$lon );
array_push($points->ele, 0 );
array_push($points->dist, 0 );
array_push($points->speed, 0 );
array_push($points->hr, 0 );
array_push($points->cad, 0 );
array_push($points->grade, 0 );
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$lastLat=$lat;
$lastLon=$lon;
}
else
{
//Normal Case
$offset = calculateDistance($lat, $lon, 0,$lastLat, $lastLon, 0);
$dist = $dist + $offset;
if (((float) $offset + (float) $lastOffset) > $gpxOffset)
{
//Bigger Offset -> write coordinate
$lastOffset=0;
array_push($points->lat, (float)$lat );
array_push($points->lon, (float)$lon );
array_push($points->ele, 0 );
array_push($points->dist, 0 );
array_push($points->speed, 0 );
array_push($points->hr, 0 );
array_push($points->cad, 0 );
array_push($points->grade, 0 );
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}
else
{
//Smoller Offset -> continue..
$lastOffset= (float) $lastOffset + (float) $offset;
}
}
$lastLat=$lat;
$lastLon=$lon;
}
unset($nodes);
}
else
{
echo "Empty Gpx or not supported File!";
}
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}
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}
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unset($gpx);
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return $points;
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}
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function getWayPoints($gpxPath)
{
$points = array();
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if (file_exists($gpxPath))
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{
$points = array();
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$gpx = simplexml_load_file($gpxPath);
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$gpx->registerXPathNamespace('10', 'http://www.topografix.com/GPX/1/0');
$gpx->registerXPathNamespace('11', 'http://www.topografix.com/GPX/1/1');
$nodes = $gpx->xpath('//wpt | //10:wpt | //11:wpt');
if ( count($nodes) > 0 )
{
// normal case
foreach($nodes as $wpt)
{
$lat = $wpt['lat'];
$lon = $wpt['lon'];
$ele = $wpt->ele;
$time = $wpt->time;
$name = $wpt->name;
$desc = $wpt->desc;
$sym = $wpt->sym;
$type = $wpt->type;
array_push($points, array((float)$lat,(float)$lon,(float)$ele,$time,$name,$desc,$sym,$type));
}
}
}
return $points;
}
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function toRadians($degrees)
{
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return (float)($degrees * 3.1415926535897932385 / 180);
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}
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function calculateDistance($lat1,$lon1,$ele1,$lat2,$lon2,$ele2)
{
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$alpha = (float)sin((float)toRadians((float) $lat2 - (float) $lat1) / 2);
$beta = (float)sin((float)toRadians((float) $lon2 - (float) $lon1) / 2);
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//Distance in meters
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$a = (float) ( (float)$alpha * (float)$alpha) + (float) ( (float)cos( (float)toRadians($lat1)) * (float)cos( (float)toRadians($lat2)) * (float)$beta * (float)$beta );
$dist = 2 * 6369628.75 * (float)atan2((float)sqrt((float)$a), (float)sqrt(1 - (float) $a));
$d = (float)sqrt((float)pow((float)$dist, 2) + pow((float) $lat1 - (float)$lat2, 2));
return sqrt((float)pow((float)$ele1-(float)$ele2,2)+(float)pow((float)$d,2));
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}
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function my_date_diff($old_date, $new_date) {
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$t1 = strtotime($new_date);
$t2 = strtotime($old_date);
// milliceconds fix
$t1 += date_getDecimals($new_date);
$t2 += date_getDecimals($old_date);
$offset = (float)($t1 - $t2);
//echo "$offset = $new_date - $old_date; ".strtotime($new_date)." ".strtotime($old_date)." <br />";
return $offset;
}
function date_getDecimals($date)
{
if (preg_match('(\.([0-9]{2})Z?)', $date, $matches))
{
return (float)((float)$matches[1] / 100);
}
else
{
return 0;
}
}
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?>