Geizkragen/admin_users.php

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<?php
// admin_users.php
require_once __DIR__ . '/lib/bootstrap.php';
// 1) Zugriffskontrolle nur ADMIN
if (empty($_SESSION['user_id']) || empty($_SESSION['user_roles']) || !in_array('ADMIN', $_SESSION['user_roles'], true)) {
die("Zugriff verweigert. Nur Administratoren dürfen diese Seite sehen.");
}
$conn = db_connect();
// 2) Aktion: Benutzer löschen
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['delete_user_id'])) {
$deleteId = (int)$_POST['delete_user_id'];
// Vermeide Selbstlöschung zur Sicherheit
if ($deleteId !== (int)$_SESSION['user_id']) {
// Zunächst Abhängigkeiten wie Rollen löschen
$conn->query("DELETE FROM userRoles WHERE userID = $deleteId");
$delStmt = $conn->prepare("DELETE FROM users WHERE userID = ?");
$delStmt->bind_param("i", $deleteId);
$delStmt->execute();
$delStmt->close();
$successMsg = "Benutzer erfolgreich gelöscht.";
} else {
$errorMsg = "Du kannst dich nicht selbst löschen.";
}
}
// 2b) Aktion: Rollen aktualisieren
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['update_roles_user_id'])) {
$updateId = (int)$_POST['update_roles_user_id'];
$selectedRoles = isset($_POST['roles']) && is_array($_POST['roles']) ? $_POST['roles'] : [];
if ($updateId === (int)$_SESSION['user_id']) {
$errorMsg = "Du kannst deine eigenen Rollen nicht ändern.";
} else {
$delStmt = $conn->prepare("DELETE FROM userRoles WHERE userID = ?");
$delStmt->bind_param("i", $updateId);
$delStmt->execute();
$delStmt->close();
if (!empty($selectedRoles)) {
$insStmt = $conn->prepare("INSERT INTO userRoles (userID, roleID) VALUES (?, ?)");
foreach ($selectedRoles as $roleId) {
$roleIdInt = (int)$roleId;
$insStmt->bind_param("ii", $updateId, $roleIdInt);
$insStmt->execute();
}
$insStmt->close();
}
$successMsg = "Rollen erfolgreich gespeichert.";
}
}
// 2c) Alle verfügbaren Rollen laden
$allRoles = [];
$rolesQuery = $conn->query("SELECT roleID, name FROM roles ORDER BY name ASC");
if ($rolesQuery) {
while ($r = $rolesQuery->fetch_assoc()) {
$allRoles[] = $r;
}
}
// 3) Alle Benutzer laden
$usersResult = $conn->query("
SELECT u.userID, u.email, u.displayname, u.profilePicture, u.isActive,
GROUP_CONCAT(ur.roleID) as roleIDs
FROM users u
LEFT JOIN userRoles ur ON u.userID = ur.userID
GROUP BY u.userID
ORDER BY u.userID ASC
");
?>
<?php include 'header.php'; ?>
<main class="auth" role="main">
<section class="auth__grid" style="display: block; max-width: 900px; margin: 40px auto; width: 90%;">
<div class="auth__card" style="width: 100%;">
<header class="auth__header">
<h1 class="auth__title">Benutzerverwaltung</h1>
<p style="text-align: center; color: #94a3b8; font-size: 0.9rem; margin-top: 5px;">Hier siehst du alle registrierten Benutzer.</p>
</header>
<?php if (!empty($successMsg)): ?>
<div class="auth__message auth__message--success" style="color: #4ade80; background: #064e3b; padding: 10px; border-radius: 4px; margin-bottom: 15px; text-align: center;"><?= htmlspecialchars($successMsg) ?></div>
<?php endif; ?>
<?php if (!empty($errorMsg)): ?>
<div class="auth__message auth__message--error" style="color: #f87171; background: #7f1d1d; padding: 10px; border-radius: 4px; margin-bottom: 15px; text-align: center;"><?= htmlspecialchars($errorMsg) ?></div>
<?php endif; ?>
<div style="overflow-x: auto; margin-top: 20px;">
<table style="width: 100%; border-collapse: collapse; text-align: left; color: #f8fafc;">
<thead>
<tr style="border-bottom: 2px solid #334155;">
<th style="padding: 12px 10px;">ID</th>
<th style="padding: 12px 10px;">Profil</th>
<th style="padding: 12px 10px;">Name</th>
<th style="padding: 12px 10px;">E-Mail</th>
<th style="padding: 12px 10px;">Rollen</th>
<th style="padding: 12px 10px;">Aktionen</th>
</tr>
</thead>
<tbody>
<?php while ($user = $usersResult->fetch_assoc()): ?>
<?php
$userRoles = !empty($user['roleIDs']) ? explode(',', $user['roleIDs']) : [];
$isSelf = (int)$user['userID'] === (int)$_SESSION['user_id'];
?>
<tr style="border-bottom: 1px solid #1e293b;">
<td style="padding: 12px 10px;"><?= $user['userID'] ?></td>
<td style="padding: 12px 10px;">
<img src="<?= !empty($user['profilePicture']) ? htmlspecialchars($user['profilePicture']) : 'assets/images/placeholder.png' ?>"
alt="Profil" style="width: 40px; height: 40px; border-radius: 50%; object-fit: cover; display: block;">
</td>
<td style="padding: 12px 10px;"><?= htmlspecialchars($user['displayname']) ?></td>
<td style="padding: 12px 10px; word-break: break-all;"><?= htmlspecialchars($user['email']) ?></td>
<td style="padding: 12px 10px; min-width: 150px;">
<?php if (!$isSelf): ?>
<form method="post" action="admin_users.php" style="margin: 0; display: flex; flex-direction: column; gap: 5px;">
<input type="hidden" name="update_roles_user_id" value="<?= $user['userID'] ?>">
<select name="roles[]" multiple size="3" style="background: #0f172a; color: #f8fafc; border: 1px solid #334155; padding: 5px; border-radius: 4px; font-size: 0.85rem; width: 100%;">
<?php foreach ($allRoles as $role): ?>
<option value="<?= $role['roleID'] ?>" <?= in_array($role['roleID'], $userRoles) ? 'selected' : '' ?>>
<?= htmlspecialchars($role['name']) ?>
</option>
<?php endforeach; ?>
</select>
<p style="font-size: 0.7rem; color: #94a3b8; margin: 0;">Strg/Cmd für Mehrfachauswahl</p>
<button type="submit" style="background-color: #3b82f6; color: white; border: none; padding: 4px 8px; border-radius: 4px; cursor: pointer; font-size: 0.75rem; width: fit-content; margin-top: 5px;">Speichern</button>
</form>
<?php else: ?>
<div style="display: flex; flex-wrap: wrap; gap: 5px;">
<?php foreach ($allRoles as $role): ?>
<?php if (in_array($role['roleID'], $userRoles)): ?>
<span style="background-color: #3b82f6; color: white; padding: 2px 6px; border-radius: 4px; font-size: 0.75rem;"><?= htmlspecialchars($role['name']) ?></span>
<?php endif; ?>
<?php endforeach; ?>
</div>
<?php endif; ?>
</td>
<td style="padding: 12px 10px;">
<?php if (!$isSelf): ?>
<form method="post" action="admin_users.php" onsubmit="return confirm('Benutzer wirklich löschen?');" style="margin: 0;">
<input type="hidden" name="delete_user_id" value="<?= $user['userID'] ?>">
<button type="submit" class="auth__submit" style="background-color: #ef4444; color: white; border: none; padding: 6px 12px; border-radius: 4px; cursor: pointer; font-size: 0.85rem; width: auto; margin: 0;">Löschen</button>
</form>
<?php else: ?>
<span style="color: #94a3b8; font-size: 0.85rem; padding: 6px 0; display: inline-block;">Das bist du</span>
<?php endif; ?>
</td>
</tr>
<?php endwhile; ?>
</tbody>
</table>
</div>
<div class="auth__actions" style="margin-top: 30px; text-align: center;">
<a href="account.php" style="color: #64748b; text-decoration: none; font-size: 0.95rem;">&larr; Zurück zum Profil</a>
</div>
</div>
</section>
</main>
<?php include 'footer.php'; ?>