<?php

$status = 0;

include_once("config.php");

if (!$access)
 die("Access not enabled in configuration file. Make sure that this page is not public before enabling it.");

if ($accessverification)
 include("auth.php");

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
 die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT ts, lat, lon FROM tracker WHERE device='" . mysqli_real_escape_string($conn, $_GET["device"]) . "' AND DATE(ts)='".date("Y-m-d")."' ORDER BY ts ASC;";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
 header('Content-Type: application/vnd.geo+json');
 header('Content-Disposition: attachment; filename="export.geojson"');
 $output = '{
 "type": "FeatureCollection",
  "crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
  "features": [
   { "type": "Feature",
     "properties": { 
      "Name": null, 
      "description": null,
      "timestamp": null,
      "begin": null,
      "end": null,
      "altitudeMode": null,
      "tessellate": -1,
      "extrude": 0,
      "visibility": -1,
      "drawOrder": null,
      "icon": null,
      "styleUrl": "#style",
      "styleHash": "1a1ac94e",
      "stroke": "#ffff00",
      "stroke_opacity": "0.4980392156862745",
      "stroke_width": "4",
      "fill": "#00ff00",
      "fill_opacity": "0.4980392156862745"
   }, 
  "geometry": { 
   "type": "LineString", 
   "coordinates": [
';

 while($row = $result->fetch_assoc()) {
  $output .= "    [ " . $row["lon"] . ", " . $row["lat"] . " ],\n";
 }

 $output = substr_replace($output, "", strrpos($output, ","), 1);

 $output .= '   ]
  } 
 }
 ]
}';

 echo $output;

} else {
 die("No records found.");
}

$conn->close();

?>