Add registration functionality and improve login logic

login.php

@@ -22,6 +22,11 @@ if (!$conn) {
 
 // 2) POST-Verarbeitung VOR jeglicher Ausgabe
 $loginError = null;
+$loginInfo = null;
+
+if (isset($_GET['registered']) && $_GET['registered'] === '1') {
+    $loginInfo = 'Registrierung erfolgreich. Du kannst dich jetzt einloggen.';
+}
 
 if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     $uname = trim(isset($_POST['uname']) ? $_POST['uname'] : '');
@@ -34,7 +39,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         // Login ist SELECT, mit Prepared Statement (sicher) und ?-Platzhalter
         $stmt = mysqli_prepare(
             $conn,
-                "SELECT displayName, passwordHash FROM users WHERE displayName = ? LIMIT 1"
+            "SELECT userID, displayName, passwordHash FROM users WHERE displayName = ? LIMIT 1"
         );
 
         if (!$stmt) {
@@ -51,17 +56,16 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                 // Optional: Rehash, falls Algorithmus/Cost geändert wurde
                 if (password_needs_rehash($user['passwordHash'], PASSWORD_DEFAULT)) {
                     $newHash = password_hash($pw, PASSWORD_DEFAULT);
-                    $upd = mysqli_prepare($conn, "UPDATE user SET passwordHash = ? WHERE id = ?");
+                    $upd = mysqli_prepare($conn, "UPDATE users SET passwordHash = ? WHERE userID = ?");
                     if ($upd) {
-                        $id = (int)$user['id'];
+                        $userID = (int)$user['userID'];
-                        mysqli_stmt_bind_param($upd, "si", $newHash, $id);
+                        mysqli_stmt_bind_param($upd, "si", $newHash, $userID);
                         mysqli_stmt_execute($upd);
                         mysqli_stmt_close($upd);
                     }
                 }
 
-                $_SESSION['user_id']     = (int)$user['id'];
+                $_SESSION['user_id']     = (int)$user['userID'];
-                $_SESSION['username']    = $user['un'];
                 $_SESSION['displayName'] = $user['displayName'];
 
                 mysqli_stmt_close($stmt);
@@ -89,6 +93,10 @@ include 'header.php';
                 <p class="auth__subtitle">Melde dich an, um deine Wunschliste zu verwalten und Deals schneller zu speichern.</p>
             </header>
 
+            <?php if ($loginInfo): ?>
+                <p class="auth__alert" role="status"><?php echo htmlspecialchars($loginInfo, ENT_QUOTES, 'UTF-8'); ?></p>
+            <?php endif; ?>
+
             <?php if ($loginError): ?>
                 <p class="auth__alert" role="alert"><?php echo htmlspecialchars($loginError, ENT_QUOTES, 'UTF-8'); ?></p>
             <?php endif; ?>
@@ -110,7 +118,7 @@ include 'header.php';
             </form>
 
             <div class="auth__links">
-                <p class="auth__muted">Neu hier? <a href="other/login.html">Account erstellen</a></p>
+                <p class="auth__muted">Neu hier? <a href="register.php">Account erstellen</a></p>
                 <p class="auth__muted"><a href="index.php">Zurück zur Startseite</a></p>
             </div>
         </div>

productpage.php

@@ -0,0 +1 @@
+<?php

register.php

@@ -0,0 +1,171 @@
+<?php
+// register.php
+
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
+session_start();
+
+// 1) DB-Verbindung (einmal)
+$servername = "localhost";
+$port = 3306;
+$username = "FSST";
+$password = "L9wUNZZ9Qkbt";
+$db = "FSST";
+
+$conn = mysqli_connect($servername, $username, $password, $db, $port);
+if (!$conn) {
+    http_response_code(500);
+    die("Datenbankfehler");
+}
+
+$errors = [];
+$values = [
+    'email' => '',
+    'displayName' => ''
+];
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $email = trim((string)(isset($_POST['email']) ? $_POST['email'] : ''));
+    $displayName = trim((string)(isset($_POST['displayName']) ? $_POST['displayName'] : ''));
+    $pw = (string)(isset($_POST['pw']) ? $_POST['pw'] : '');
+    $pw2 = (string)(isset($_POST['pw2']) ? $_POST['pw2'] : '');
+
+    $values['email'] = $email;
+    $values['displayName'] = $displayName;
+
+    // Validierung
+    if ($email === '' || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
+        $errors[] = 'Bitte eine gültige E-Mail-Adresse eingeben.';
+    }
+
+    if ($displayName === '' || mb_strlen($displayName) < 3 || mb_strlen($displayName) > 50) {
+        $errors[] = 'Bitte einen Benutzernamen mit 3–50 Zeichen eingeben.';
+    }
+
+    if ($pw === '' || mb_strlen($pw) < 8) {
+        $errors[] = 'Bitte ein Passwort mit mindestens 8 Zeichen wählen.';
+    }
+
+    if ($pw !== $pw2) {
+        $errors[] = 'Die Passwörter stimmen nicht überein.';
+    }
+
+    // Duplicate-Checks
+    if (!$errors) {
+        $stmt = mysqli_prepare($conn, 'SELECT userID FROM users WHERE email = ? LIMIT 1');
+        if (!$stmt) {
+            $errors[] = 'Datenbankfehler.';
+        } else {
+            mysqli_stmt_bind_param($stmt, 's', $email);
+            mysqli_stmt_execute($stmt);
+            $result = mysqli_stmt_get_result($stmt);
+            if ($result && mysqli_fetch_assoc($result)) {
+                $errors[] = 'Diese E-Mail ist bereits registriert.';
+            }
+            mysqli_stmt_close($stmt);
+        }
+    }
+
+    if (!$errors) {
+        $stmt = mysqli_prepare($conn, 'SELECT userID FROM users WHERE displayName = ? LIMIT 1');
+        if (!$stmt) {
+            $errors[] = 'Datenbankfehler.';
+        } else {
+            mysqli_stmt_bind_param($stmt, 's', $displayName);
+            mysqli_stmt_execute($stmt);
+            $result = mysqli_stmt_get_result($stmt);
+            if ($result && mysqli_fetch_assoc($result)) {
+                $errors[] = 'Dieser Benutzername ist bereits vergeben.';
+            }
+            mysqli_stmt_close($stmt);
+        }
+    }
+
+    // Insert
+    if (!$errors) {
+        $hash = password_hash($pw, PASSWORD_DEFAULT);
+        $stmt = mysqli_prepare(
+            $conn,
+            'INSERT INTO users (email, passwordHash, displayName, isActive, createdAt) VALUES (?, ?, ?, 1, NOW())'
+        );
+
+        if (!$stmt) {
+            $errors[] = 'Datenbankfehler.';
+        } else {
+            mysqli_stmt_bind_param($stmt, 'sss', $email, $hash, $displayName);
+            $ok = mysqli_stmt_execute($stmt);
+            mysqli_stmt_close($stmt);
+
+            if ($ok) {
+                mysqli_close($conn);
+                header('Location: login.php?registered=1');
+                exit;
+            }
+
+            $errors[] = 'Registrierung fehlgeschlagen.';
+        }
+    }
+}
+
+include 'header.php';
+?>
+<link rel="stylesheet" href="assets/css/login.css">
+
+<main class="auth" role="main">
+    <section class="auth__grid" aria-label="Registrierung Bereich">
+        <div class="auth__card">
+            <header class="auth__header">
+                <h2 class="auth__title">Registrierung</h2>
+                <p class="auth__subtitle">Erstelle einen Account, um deine Wunschliste zu verwalten und Deals schneller zu speichern.</p>
+            </header>
+
+            <?php if ($errors): ?>
+                <div class="auth__alert" role="alert">
+                    <ul>
+                        <?php foreach ($errors as $e): ?>
+                            <li><?php echo htmlspecialchars($e, ENT_QUOTES, 'UTF-8'); ?></li>
+                        <?php endforeach; ?>
+                    </ul>
+                </div>
+            <?php endif; ?>
+
+            <form class="auth__form" action="register.php" method="POST" autocomplete="on">
+                <div class="auth__field">
+                    <label for="email">E-Mail</label>
+                    <input type="email" id="email" name="email" autocomplete="email" required value="<?php echo htmlspecialchars($values['email'], ENT_QUOTES, 'UTF-8'); ?>">
+                </div>
+
+                <div class="auth__field">
+                    <label for="displayName">Username</label>
+                    <input type="text" id="displayName" name="displayName" inputmode="text" autocomplete="username" required value="<?php echo htmlspecialchars($values['displayName'], ENT_QUOTES, 'UTF-8'); ?>">
+                </div>
+
+                <div class="auth__field">
+                    <label for="pw">Passwort</label>
+                    <input type="password" id="pw" name="pw" autocomplete="new-password" required>
+                </div>
+
+                <div class="auth__field">
+                    <label for="pw2">Passwort wiederholen</label>
+                    <input type="password" id="pw2" name="pw2" autocomplete="new-password" required>
+                </div>
+
+                <div class="auth__actions">
+                    <input class="auth__submit" type="submit" value="Registrieren">
+                </div>
+            </form>
+
+            <div class="auth__links">
+                <p class="auth__muted">Schon registriert? <a href="login.php">Einloggen</a></p>
+                <p class="auth__muted"><a href="index.php">Zurück zur Startseite</a></p>
+            </div>
+        </div>
+    </section>
+</main>
+
+<?php
+mysqli_close($conn);
+include 'footer.php';
+?>