[Script] A ready to use tracker script for apps that support HTTP GET requests.

[adegans]

A tracker receiver for other apps that support HTTP requests.

Place the files as track.php in the /client/ folder. Uses internal auth functions and DB connections.

I've used it for a few days as a test and all seems to work on my Samsung Galaxy A52 w/ Android 11. I then realized that I didn't want to track my phone constantly. So I'll post it here for others to use.

See PHP comments for usage:

<?php
/* μlogger - 3rd party tracker via $_GET
 *
 * Copyright(C) 2022 Arnan de Gans (www.arnan.me)
 * Based on original code by 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/>.
 */
 
/* USAGE:
 * user = uLogger username (Required, string[15], follows original auth routine)
 * pass = uLogger password (Required, string[15], follows original auth routine)
 * track = The track name you see and use in the uLogger web UI. (Required, string[255] (preferably alphanumeric and _-))
 * lat = Latitude (Required, float)
 * lon = Longtitude (Required, float) 
 * time = UNIX timestamp (Required, int)
 * alt = Altitude (Optional, float)
 * acc = GPS accuracy (Optional, int)
 * spd = Speed of device (Optional, float)
 * dir = Compass bearing (Optional, float)
 * batt = Will be formatted to go into $comment and indicates the device battery level if supported/added (Optional, float)
 * txt = Add a comment to each waypoint if desired (Optional, string[230] (Leave space for battery indicator))
 * 
 * NOTES:
 * If the track name provided through 'track' does not exist it will be created on the first request/sync. 
 * Track names must be unique for the user. Different users can use the same track name.
 * 'track' is required to populate $trackId.
 * 
 * EXAMPLES:
 * Essentials: https://domain.tld/client/track.php?user=[string]&pass=[string]&track=[string]&lat=[float]&lon=[float]&time=[integer]
 * PhoneTrack for Android: https://domain.tld/client/track.php?user=demo&pass=demo&track=track-name&lat=%LAT&lon=%LON&time=%TIMESTAMP&alt=%ALT&acc=%ACC&spd=%SPD&dir=%DIR&batt=%BATT
 */ 

/**
 * Exit with error status and message
 *
 * @param string $message Message
 */
function exitWithError($message) {
  $response = [];
  $response['error'] = true;
  $response['message'] = $message;
  header('Content-Type: application/json');
  echo json_encode($response);
  exit();
}

/**
 * Exit with success status
 *
 * @param array $params Optional params
 * @return void
 */
function exitWithSuccess($params = []) {
  $response = [];
  $response['error'] = false;
  header('Content-Type: application/json');
  echo json_encode(array_merge($response, $params));
  exit();
}

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

// Set up login
$auth = new uAuth();
$login = uUtils::getString('user');
$pass = uUtils::getString('pass');

if ($auth->checkLogin($login, $pass)) {
	$trackName = uUtils::getString('track');
	if (empty($trackName)) {
		exitWithError("Missing required parameter - track");
	}

	// Find tracks for user
	require_once(ROOT_DIR . "/helpers/track.php");
	if ($auth->hasReadAccess($auth->user->id)) {
		$tracksArr = uTrack::getAll($auth->user->id);
	}
	
	if (count($tracksArr) > 0) {
		$result = array();

		foreach ($tracksArr as $track) {
			$result[$track->id] = $track->name;
		}

		// Fetch track ID if it exists for the track name
		$trackId = array_search($trackName, $result);
	}	

	// No track ID found, create one
	if ($trackId === false) {
		$trackId = uTrack::add($auth->user->id, $trackName);
	}

	// Record new waypoint
    $latitude = uUtils::getFloat('lat');
    $longitude = uUtils::getFloat('lon');
    $timestamp = uUtils::getInt('time');
    // Optional
    $altitude = uUtils::getFloat('alt');
    $accuracy = uUtils::getInt('acc');
    $speed = uUtils::getFloat('spd');
    $bearing = uUtils::getFloat('dir');
    $battery = uUtils::getFloat('batt');
    $comment = uUtils::getString('txt');
    
    if (!is_null($battery)) {
	    if (strlen($comment) > 0) {
	    	$comment = $comment.' ';
	    }
    	$comment = $comment.'Battery: '.$battery.'%';
    }

    if (!is_float($latitude) || !is_float($longitude) || !is_int($timestamp)) {
		exitWithError("Missing required parameter - lat lon time");
    }

    require_once(ROOT_DIR . "/helpers/position.php");
    $positionId = uPosition::add($auth->user->id, $trackId, $timestamp, $latitude, $longitude, $altitude, $speed, $bearing, $accuracy, null, $comment);

    if ($positionId === false) {
		exitWithError("Server error");
    }
    exitWithSuccess();
} else {
	// Fail if user is unknown
	$auth->sendUnauthorizedHeader();
	exitWithError("Unauthorized");
}
?>