2023-08-13 19:51:44 +02:00
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<?php
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2023-08-16 16:46:54 +02:00
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session_start();
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2023-08-13 19:51:44 +02:00
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2023-08-13 22:08:35 +02:00
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define('IDENTITIES_FILE', 'identities.json');
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define('PRESENT_FILE', 'present.json');
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2023-08-13 19:51:44 +02:00
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2023-08-16 16:46:54 +02:00
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define('NAME_PATTERN', "^([ a-zA-Z'\-]){1,30}$");
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define('MAC_PATTERN', "^([0-9A-Fa-f]{2}[:-s]){5}([0-9A-Fa-f]{2})$");
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define('PAGE_TITLE', 'CZI Presence Detector');
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2023-08-13 19:51:44 +02:00
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2023-08-13 22:08:35 +02:00
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$present = json_decode(file_get_contents(PRESENT_FILE), true);
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2023-08-13 19:51:44 +02:00
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$tz = 'Europe/Berlin';
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$datetime = new DateTime("now", new DateTimeZone($tz));
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$datetime->setTimestamp($present["timestamp"]);
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2023-08-16 16:46:54 +02:00
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function hash_mac($mac)
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{
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$normalized_mac = str_replace('-', ':', strtolower($mac));
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2023-08-13 19:51:44 +02:00
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$hashed_mac = hash('sha256', $normalized_mac);
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2023-08-13 22:08:35 +02:00
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return $hashed_mac;
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}
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2023-08-16 16:46:54 +02:00
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function add_identity($name, $mac)
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{
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2023-08-13 22:08:35 +02:00
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if (
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2023-08-16 16:46:54 +02:00
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preg_match('/' . NAME_PATTERN . '/', $name) != 1 ||
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preg_match('/' . MAC_PATTERN . '/', $mac) != 1
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) {
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http_response_code(400);
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die("Bad data");
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}
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$hashed_mac = hash_mac($mac);
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$identities = json_decode(file_get_contents(IDENTITIES_FILE), true);
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$url = strtok($_SERVER['REQUEST_URI'], '?');
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foreach ($identities as $identity) {
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if ($identity['name'] == $name) {
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$_SESSION['form_success'] = false;
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$_SESSION['form_success_message'] = 'Name already in use, please choose a different one.';
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header("Location: " . $url, true, 303);
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exit();
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}
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if ($identity['mac_hash'] == $hashed_mac) {
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$_SESSION['form_success'] = false;
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$_SESSION['form_success_message'] = 'MAC already set up, please remove it first to change name.';
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header("Location: " . $url, true, 303);
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exit();
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}
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}
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array_push($identities, array("name" => $name, "mac_hash" => $hashed_mac));
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file_put_contents(IDENTITIES_FILE, json_encode($identities));
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$_SESSION['form_success'] = true;
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$_SESSION['form_success_message'] = 'Identity successfully saved.';
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header("Location: " . $url, true, 303);
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exit();
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}
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2023-08-16 16:46:54 +02:00
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function remove_identity($mac)
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{
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if (preg_match('/' . MAC_PATTERN . '/', $mac) != 1) {
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http_response_code(400);
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die("Bad data");
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}
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2023-08-13 22:08:35 +02:00
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2023-08-16 16:46:54 +02:00
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$hashed_mac = hash_mac($mac);
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2023-08-13 19:51:44 +02:00
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2023-08-16 16:53:38 +02:00
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$url = strtok($_SERVER['REQUEST_URI'], '?');
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2023-08-16 16:46:54 +02:00
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$identities = json_decode(file_get_contents(IDENTITIES_FILE), true);
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2023-08-13 19:51:44 +02:00
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2023-08-16 16:46:54 +02:00
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$new_identities = array();
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2023-08-16 16:46:54 +02:00
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foreach ($identities as $identity) {
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if ($identity['mac_hash'] != $hashed_mac) {
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array_push($new_identities, $identity);
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2023-08-13 19:51:44 +02:00
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}
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2023-08-13 22:08:35 +02:00
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2023-08-16 16:46:54 +02:00
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file_put_contents(IDENTITIES_FILE, json_encode($new_identities));
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2023-08-13 22:08:35 +02:00
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2023-08-16 16:46:54 +02:00
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$_SESSION['form_success'] = true;
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$_SESSION['form_success_message'] = 'Identity successfully removed.';
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2023-08-16 16:53:38 +02:00
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header("Location: " . $url, true, 303);
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exit();
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}
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$_SESSION['form_success'] = false;
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$_SESSION['form_success_message'] = 'Identity not found.';
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header("Location: " . $url, true, 303);
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exit();
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2023-08-13 22:08:35 +02:00
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}
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if ($_SERVER['REQUEST_METHOD'] == "POST") {
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if (
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isset($_POST['name']) &&
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2023-08-13 22:08:35 +02:00
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isset($_POST['mac'])
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) {
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add_identity($_POST['name'], $_POST['mac']);
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2023-08-16 16:46:54 +02:00
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} else if (isset($_POST['remove-mac'])) {
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remove_identity($_POST['remove-mac']);
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}
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2023-08-13 19:51:44 +02:00
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}
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?>
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<html>
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2023-08-16 16:46:54 +02:00
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<head>
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<title><?php echo PAGE_TITLE; ?></title>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<link href="bootstrap/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-4bw+/aepP/YC94hEpVNVgiZdgIC5+VKNBQNGCHeKRQN+PtmoHDEXuppvnDJzQIu9" crossorigin="anonymous">
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<script src="bootstrap/js/bootstrap.bundle.min.js" integrity="sha384-HwwvtgBNo3bZJJLYd8oVXjrBZt8cqVSpeBNS5n7C8IVInixGAoxmnlMuBnhbgrkm" crossorigin="anonymous"></script>
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</head>
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<body>
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<nav class="navbar navbar-light bg-light justify-content-between" style="padding: 0">
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<span class="navbar-brand mb-0 h1" style="padding-left: 1rem"><?php echo PAGE_TITLE; ?></span>
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</nav>
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2023-08-13 19:51:44 +02:00
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<div id="content" style="padding: 2rem;">
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<h2>Jetzt gerade im CZI <small>(letztes Update von <?php echo $datetime->format('H:i:s d.m.Y'); ?>)</small></h2><br>
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<table class="table">
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<thead>
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<tr>
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<th>Name</th>
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</tr>
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</thead>
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<?php
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foreach ($present["names"] as $name) {
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2023-08-13 19:51:44 +02:00
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?>
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<tr>
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<td><?php echo $name; ?></td>
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</tr>
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<?php
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}
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?>
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</table>
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<br><br>
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<?php
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if (isset($_SESSION['form_success'])) {
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if ($_SESSION['form_success'] === false) {
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?>
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<div class="alert alert-danger" role="alert">
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<?php echo $_SESSION['form_success_message']; ?>
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</div>
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<?php
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} else if ($_SESSION['form_success'] === true) {
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?>
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<div class="alert alert-success" role="alert">
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<?php echo $_SESSION['form_success_message']; ?>
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</div>
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<?php
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}
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unset($_SESSION['form_success']);
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unset($_SESSION['form_success_message']);
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} ?>
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2023-08-16 16:49:05 +02:00
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<div class="row justify-content-start row-cols-sm-1 row-cols-md-1 row-cols-lg-2 row-cols-xl-3">
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<div class="col col-md-4">
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<div class="card" style="max-width: 30rem;">
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<div class="card-body">
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<h5 class="card-title">Neues Gerät tracken</h5>
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<form method="POST">
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<input class="form-control" type="text" name="name" pattern="<?php echo NAME_PATTERN; ?>" placeholder="Name" value="" /><br>
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<input class="form-control" type="text" name="mac" pattern="<?php echo MAC_PATTERN; ?>" placeholder="MAC-Adresse" value="" /><br>
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<button class="btn btn-primary" type="submit">Speichern</button>
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</form>
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</div>
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</div>
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</div>
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<div class="col col-md-4">
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<div class="card" style="max-width: 30rem;">
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<div class="card-body">
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<h5 class="card-title">Gerät entfernen</h5>
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<form method="POST">
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2023-08-16 16:50:08 +02:00
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<input class="form-control" type="text" name="remove-mac" pattern="<?php echo MAC_PATTERN; ?>" placeholder="MAC-Adresse" value="" /><br>
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<button class="btn btn-primary" type="submit">Entfernen</button>
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</form>
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</div>
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</div>
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</div>
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</div>
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2023-08-13 19:51:44 +02:00
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</div>
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2023-08-16 16:46:54 +02:00
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</body>
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2023-08-13 19:51:44 +02:00
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</html>
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