1 files changed, 87 insertions, 0 deletions
diff --git a/getpositions.php b/getpositions.php
new file mode 100755
index 0000000..2f22aa0
--- /dev/null
+++ b/getpositions.php
@@ -0,0 +1,87 @@
+<?php
+/* phpTrackme
+ *
+ * Copyright(C) 2013 Bartek Fabiszewski (www.fabiszewski.net)
+ *
+ * This is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+require_once("auth.php");
+
+$userid = ((isset($_REQUEST["userid"]) && is_numeric($_REQUEST["userid"])) ? $_REQUEST["userid"] : 0);
+$trackid = ((isset($_REQUEST["trackid"]) && is_numeric($_REQUEST["trackid"])) ? $_REQUEST["trackid"] : 0);
+
+function haversine_distance($lat1, $lon1, $lat2, $lon2) {
+  $lat1 = deg2rad($lat1);
+  $lon1 = deg2rad($lon1);
+  $lat2 = deg2rad($lat2);
+  $lon2 = deg2rad($lon2);
+  $latD = $lat2 - $lat1;
+  $lonD = $lon2 - $lon1;
+  $angle = 2*asin(sqrt(pow(sin($latD/2),2)+cos($lat1)*cos($lat2)*pow(sin($lonD/2),2)));
+  return $angle * 6371000;
+}
+
+if ($userid) {
+  if ($trackid) {
+    // get all track data
+    $query = $mysqli->prepare("SELECT positions.ID,Latitude,Longitude,Altitude,Speed,Angle,DateOccurred,username,trips.Name,trips.ID FROM positions LEFT JOIN users ON (positions.FK_Users_ID=users.ID) LEFT JOIN trips ON (positions.FK_Trips_ID=trips.ID) WHERE positions.FK_Users_ID=? AND positions.FK_Trips_ID=? ORDER BY positions.DateOccurred");
+    $query->bind_param('ii', $userid, $trackid);
+  }
+  else {
+    // get data only for latest point
+    $query = $mysqli->prepare("SELECT positions.ID,Latitude,Longitude,Altitude,Speed,Angle,DateOccurred,username,trips.Name,trips.ID FROM positions LEFT JOIN users ON (positions.FK_Users_ID=users.ID) LEFT JOIN trips ON (positions.FK_Trips_ID=trips.ID) WHERE positions.FK_Users_ID=? ORDER BY positions.DateOccurred DESC LIMIT 1");
+    $query->bind_param('i', $userid);    
+  }
+  $query->execute();
+  $query->bind_result($positionid,$latitude,$longitude,$altitude,$speed,$angle,$dateoccured,$username,$trackname,$trackid);
+
+  header("Content-type: text/xml");
+  $xml = new XMLWriter();
+  $xml->openURI("php://output");
+  $xml->startDocument("1.0");
+  $xml->setIndent(true);
+  $xml->startElement('root');
+  
+  while ($query->fetch()) {
+    $xml->startElement("position");
+    $xml->writeAttribute("id", $positionid);
+      $xml->writeElement("latitude", $latitude); 
+      $xml->writeElement("longitude", $longitude); 
+      $xml->writeElement("altitude", ($altitude)?round($altitude):$altitude); 
+      $xml->writeElement("speed", $speed); 
+      $xml->writeElement("angle", $angle); 
+      $xml->writeElement("dateoccured", $dateoccured);   
+      $xml->writeElement("username", $username);   
+      $xml->writeElement("trackid", $trackid); 
+      $xml->writeElement("trackname", $trackname); 
+      $distance = (isset($prev_latitude))?haversine_distance($prev_latitude,$prev_longitude,$latitude,$longitude):0;
+      $prev_latitude = $latitude;
+      $prev_longitude = $longitude;
+      $xml->writeElement("distance", round($distance));   
+      $seconds = (isset($prev_dateoccured))?(strtotime($dateoccured)-strtotime($prev_dateoccured)):0;
+      $prev_dateoccured = $dateoccured;
+      $xml->writeElement("seconds", $seconds);   
+    $xml->endElement();    
+  }
+  
+  $xml->endElement();
+  $xml->endDocument();  
+  $xml->flush();
+
+  $query->free_result();
+}
+
+$mysqli->close();
+?>