88 lines
3.7 KiB
PHP
88 lines
3.7 KiB
PHP
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<?php
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/* phpTrackme
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*
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* Copyright(C) 2013 Bartek Fabiszewski (www.fabiszewski.net)
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*
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* This is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Library General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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require_once("auth.php");
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$userid = ((isset($_REQUEST["userid"]) && is_numeric($_REQUEST["userid"])) ? $_REQUEST["userid"] : 0);
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$trackid = ((isset($_REQUEST["trackid"]) && is_numeric($_REQUEST["trackid"])) ? $_REQUEST["trackid"] : 0);
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function haversine_distance($lat1, $lon1, $lat2, $lon2) {
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$lat1 = deg2rad($lat1);
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$lon1 = deg2rad($lon1);
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$lat2 = deg2rad($lat2);
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$lon2 = deg2rad($lon2);
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$latD = $lat2 - $lat1;
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$lonD = $lon2 - $lon1;
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$angle = 2*asin(sqrt(pow(sin($latD/2),2)+cos($lat1)*cos($lat2)*pow(sin($lonD/2),2)));
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return $angle * 6371000;
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}
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if ($userid) {
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if ($trackid) {
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// get all track data
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$query = $mysqli->prepare("SELECT positions.ID,Latitude,Longitude,Altitude,Speed,Angle,DateOccurred,username,trips.Name,trips.ID FROM positions LEFT JOIN users ON (positions.FK_Users_ID=users.ID) LEFT JOIN trips ON (positions.FK_Trips_ID=trips.ID) WHERE positions.FK_Users_ID=? AND positions.FK_Trips_ID=? ORDER BY positions.DateOccurred");
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$query->bind_param('ii', $userid, $trackid);
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}
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else {
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// get data only for latest point
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$query = $mysqli->prepare("SELECT positions.ID,Latitude,Longitude,Altitude,Speed,Angle,DateOccurred,username,trips.Name,trips.ID FROM positions LEFT JOIN users ON (positions.FK_Users_ID=users.ID) LEFT JOIN trips ON (positions.FK_Trips_ID=trips.ID) WHERE positions.FK_Users_ID=? ORDER BY positions.DateOccurred DESC LIMIT 1");
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$query->bind_param('i', $userid);
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}
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$query->execute();
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$query->bind_result($positionid,$latitude,$longitude,$altitude,$speed,$angle,$dateoccured,$username,$trackname,$trackid);
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header("Content-type: text/xml");
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$xml = new XMLWriter();
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$xml->openURI("php://output");
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$xml->startDocument("1.0");
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$xml->setIndent(true);
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$xml->startElement('root');
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while ($query->fetch()) {
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$xml->startElement("position");
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$xml->writeAttribute("id", $positionid);
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$xml->writeElement("latitude", $latitude);
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$xml->writeElement("longitude", $longitude);
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$xml->writeElement("altitude", ($altitude)?round($altitude):$altitude);
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$xml->writeElement("speed", $speed);
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$xml->writeElement("angle", $angle);
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$xml->writeElement("dateoccured", $dateoccured);
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$xml->writeElement("username", $username);
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$xml->writeElement("trackid", $trackid);
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$xml->writeElement("trackname", $trackname);
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$distance = (isset($prev_latitude))?haversine_distance($prev_latitude,$prev_longitude,$latitude,$longitude):0;
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$prev_latitude = $latitude;
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$prev_longitude = $longitude;
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$xml->writeElement("distance", round($distance));
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$seconds = (isset($prev_dateoccured))?(strtotime($dateoccured)-strtotime($prev_dateoccured)):0;
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$prev_dateoccured = $dateoccured;
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$xml->writeElement("seconds", $seconds);
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$xml->endElement();
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}
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$xml->endElement();
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$xml->endDocument();
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$xml->flush();
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$query->free_result();
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}
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$mysqli->close();
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?>
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