<?php
/* μlogger
 *
 * Copyright(C) 2017 Bartek Fabiszewski (www.fabiszewski.net)
 *
 * This is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 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 General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

require_once(dirname(__DIR__) . "/helpers/auth.php");
require_once(ROOT_DIR . "/helpers/position.php");
require_once(ROOT_DIR . "/helpers/utils.php");

$auth = new uAuth();

$userId = uUtils::getInt('userid');
$trackId = uUtils::getInt('trackid');

$positionsArr = [];
if ($userId) {
  if (uConfig::$public_tracks ||
      ($auth->isAuthenticated() && ($auth->isAdmin() || $auth->user->id === $userId))) {
    if ($trackId) {
      // get all track data
      $positionsArr = uPosition::getAll($userId, $trackId);
    } else {
      // get data only for latest point
      $position = uPosition::getLast($userId);
      if ($position->isValid) {
        $positionsArr[] = $position;
      }
    }
  }
}

header("Content-type: text/xml");
$xml = new XMLWriter();
$xml->openURI("php://output");
$xml->startDocument("1.0");
$xml->setIndent(true);
$xml->startElement('root');

foreach ($positionsArr as $position) {
  /** @var uPosition $prevPosition */
  $xml->startElement("position");
  $xml->writeAttribute("id", $position->id);
    $xml->writeElement("latitude", $position->latitude);
    $xml->writeElement("longitude", $position->longitude);
    $xml->writeElement("altitude", ($position->altitude) ? round($position->altitude) : $position->altitude);
    $xml->writeElement("speed", $position->speed);
    $xml->writeElement("bearing", $position->bearing);
    $xml->writeElement("timestamp", $position->timestamp);
    $xml->writeElement("accuracy", $position->accuracy);
    $xml->writeElement("provider", $position->provider);
    $xml->writeElement("comments", $position->comment);
    $xml->writeElement("username", $position->userLogin);
    $xml->writeElement("trackid", $position->trackId);
    $xml->writeElement("trackname", $position->trackName);
    $distance = isset($prevPosition) ? $position->distanceTo($prevPosition) : 0;
    $xml->writeElement("distance", round($distance));
    $seconds = isset($prevPosition) ? $position->secondsTo($prevPosition) : 0;
    $xml->writeElement("seconds", $seconds);
  $xml->endElement();
  $prevPosition = $position;
}

$xml->endElement();
$xml->endDocument();
$xml->flush();

?>