Add encrypted day storage and personal backups

src/App.php

@@ -321,9 +321,15 @@ final class App
             redirect('/track');
         }
 
-        $previousEntry = $this->entries->find($user['username'], shift_date($entry['date'], -1));
-        $evaluation = $this->scoring->evaluate($entry, $settings, $previousEntry);
-        $this->entries->save($user['username'], $entry['date'], $entry, $evaluation);
+        $entries = $this->entries->all($user['username']);
+        $entryMap = [];
+
+        foreach ($entries as $existingEntry) {
+            $entryMap[(string) ($existingEntry['date'] ?? '')] = $existingEntry;
+        }
+
+        $entryMap[$entry['date']] = $entry;
+        $this->persistUserEntries($user['username'], $settings, array_values($entryMap));
 
         flash('success', 'Der Tag wurde gespeichert.');
         redirect('/track?date=' . rawurlencode($entry['date']));
@@ -395,6 +401,7 @@ final class App
             'pushAvailable' => $pushAvailable,
             'pushPublicKey' => $pushPublicKey,
             'pushSubscriptionCount' => $this->notifications->subscriptionCount($user['username']),
+            'backupAvailable' => class_exists('ZipArchive'),
             'users' => $user['is_admin'] ? $this->users->all() : [],
             'maxScore' => $this->scoring->evaluate([
                 'mood' => 10,
@@ -433,6 +440,24 @@ final class App
             redirect('/options');
         }
 
+        if ($form === 'export_backup') {
+            $settings = $this->hydrateSettings($this->settings->forUser($user['username']));
+            $this->downloadUserBackup($user, $settings);
+        }
+
+        if ($form === 'import_backup') {
+            $settings = $this->hydrateSettings($this->settings->forUser($user['username']));
+
+            try {
+                $imported = $this->importUserBackup($user, $settings);
+                flash('success', $imported . ' Tag' . ($imported === 1 ? '' : 'e') . ' aus dem Backup importiert.');
+            } catch (RuntimeException $exception) {
+                flash('error', $exception->getMessage());
+            }
+
+            redirect('/options');
+        }
+
         if ($form === 'password') {
             $current = (string) ($_POST['current_password'] ?? '');
             $new = (string) ($_POST['new_password'] ?? '');
@@ -519,6 +544,220 @@ final class App
         ];
     }
 
+    private function persistUserEntries(string $username, array $settings, array $entries): void
+    {
+        $normalized = [];
+
+        foreach ($entries as $entry) {
+            if (!is_array($entry)) {
+                continue;
+            }
+
+            $normalizedEntry = $this->scoring->normalize($entry);
+            if (!$this->isValidDate((string) ($normalizedEntry['date'] ?? ''))) {
+                continue;
+            }
+
+            $normalized[$normalizedEntry['date']] = $normalizedEntry;
+        }
+
+        ksort($normalized, SORT_STRING);
+
+        $previousEntry = null;
+        foreach ($normalized as $date => $entry) {
+            $evaluation = $this->scoring->evaluate($entry, $settings, $previousEntry);
+            $this->entries->save($username, $date, $entry, $evaluation);
+            $previousEntry = $entry;
+        }
+    }
+
+    private function downloadUserBackup(array $user, array $settings): never
+    {
+        if (!class_exists('ZipArchive')) {
+            flash('error', 'Für den Backup-Download fehlt auf diesem Server die ZIP-Erweiterung.');
+            redirect('/options');
+        }
+
+        $entries = $this->evaluateEntriesWithContext($this->entries->all($user['username']), $settings);
+        $tempPath = tempnam(sys_get_temp_dir(), 'mood-backup-');
+
+        if ($tempPath === false) {
+            throw new RuntimeException('Das Backup konnte gerade nicht vorbereitet werden.');
+        }
+
+        $zip = new ZipArchive();
+        $opened = $zip->open($tempPath, ZipArchive::OVERWRITE);
+
+        if ($opened !== true) {
+            @unlink($tempPath);
+            throw new RuntimeException('Das Backup konnte nicht als ZIP erstellt werden.');
+        }
+
+        foreach ($entries as $entry) {
+            $date = (string) ($entry['date'] ?? '');
+            if (!$this->isValidDate($date)) {
+                continue;
+            }
+
+            $markdown = $this->entries->exportMarkdown(
+                (string) ($user['username'] ?? ''),
+                $date,
+                $entry,
+                $entry['evaluation'] ?? $this->scoring->evaluate($entry, $settings)
+            );
+
+            $zip->addFromString($date . '.txt', $markdown);
+        }
+
+        $zip->close();
+
+        $fileName = 'mood-board-backup-' . normalize_username((string) ($user['username'] ?? 'user')) . '-' . today() . '.zip';
+
+        header('Content-Type: application/zip');
+        header('Content-Disposition: attachment; filename="' . $fileName . '"');
+        header('Content-Length: ' . (string) filesize($tempPath));
+        header('Cache-Control: no-store, no-cache, must-revalidate');
+        header('Pragma: no-cache');
+
+        readfile($tempPath);
+        @unlink($tempPath);
+        exit;
+    }
+
+    private function importUserBackup(array $user, array $settings): int
+    {
+        $files = uploaded_files('backup_files');
+        if ($files === []) {
+            throw new RuntimeException('Bitte wähle mindestens eine Backup-Datei aus.');
+        }
+
+        $importedEntries = [];
+
+        foreach ($files as $file) {
+            $error = (int) ($file['error'] ?? UPLOAD_ERR_NO_FILE);
+            if ($error === UPLOAD_ERR_NO_FILE) {
+                continue;
+            }
+
+            if ($error !== UPLOAD_ERR_OK) {
+                throw new RuntimeException('Eine Backup-Datei konnte nicht hochgeladen werden.');
+            }
+
+            $tmpName = (string) ($file['tmp_name'] ?? '');
+            $name = trim((string) ($file['name'] ?? ''));
+
+            if ($tmpName === '' || !is_uploaded_file($tmpName)) {
+                throw new RuntimeException('Eine Backup-Datei ist ungültig.');
+            }
+
+            $extension = strtolower(pathinfo($name, PATHINFO_EXTENSION));
+
+            if ($extension === 'zip') {
+                foreach ($this->entriesFromZip($tmpName) as $date => $entry) {
+                    $importedEntries[$date] = $entry;
+                }
+                continue;
+            }
+
+            if ($extension !== 'txt') {
+                throw new RuntimeException('Es werden nur .txt-Dateien oder ZIP-Backups unterstützt.');
+            }
+
+            $date = $this->dateFromBackupFileName($name);
+            $content = (string) file_get_contents($tmpName);
+            $entry = $this->entries->parseMarkdown($content, $date);
+
+            if ($entry === null) {
+                throw new RuntimeException('Mindestens eine Tagesdatei konnte nicht gelesen werden.');
+            }
+
+            $importedEntries[$date] = $entry;
+        }
+
+        if ($importedEntries === []) {
+            throw new RuntimeException('Im Backup wurden keine gültigen Tagesdateien gefunden.');
+        }
+
+        $existingEntries = $this->entries->all((string) ($user['username'] ?? ''));
+        $entryMap = [];
+
+        foreach ($existingEntries as $entry) {
+            if (!is_array($entry) || !$this->isValidDate((string) ($entry['date'] ?? ''))) {
+                continue;
+            }
+
+            $entryMap[$entry['date']] = $entry;
+        }
+
+        foreach ($importedEntries as $date => $entry) {
+            $entryMap[$date] = $entry;
+        }
+
+        $this->persistUserEntries((string) ($user['username'] ?? ''), $settings, array_values($entryMap));
+
+        return count($importedEntries);
+    }
+
+    private function entriesFromZip(string $path): array
+    {
+        if (!class_exists('ZipArchive')) {
+            throw new RuntimeException('ZIP-Import ist auf diesem Server nicht verfügbar.');
+        }
+
+        $zip = new ZipArchive();
+        $opened = $zip->open($path);
+
+        if ($opened !== true) {
+            throw new RuntimeException('Das ZIP-Backup konnte nicht geöffnet werden.');
+        }
+
+        $entries = [];
+
+        for ($index = 0; $index < $zip->numFiles; $index++) {
+            $name = (string) $zip->getNameIndex($index);
+            if ($name === '' || str_ends_with($name, '/')) {
+                continue;
+            }
+
+            $baseName = basename($name);
+            if (!preg_match('/^\d{4}-\d{2}-\d{2}\.txt$/', $baseName)) {
+                continue;
+            }
+
+            $date = $this->dateFromBackupFileName($baseName);
+            $content = $zip->getFromIndex($index);
+
+            if (!is_string($content)) {
+                continue;
+            }
+
+            $entry = $this->entries->parseMarkdown($content, $date);
+            if ($entry !== null) {
+                $entries[$date] = $entry;
+            }
+        }
+
+        $zip->close();
+
+        return $entries;
+    }
+
+    private function dateFromBackupFileName(string $fileName): string
+    {
+        $baseName = basename($fileName);
+
+        if (!preg_match('/^(\d{4}-\d{2}-\d{2})\.txt$/', $baseName, $matches)) {
+            throw new RuntimeException('Backup-Dateien müssen als YYYY-MM-DD.txt benannt sein.');
+        }
+
+        $date = (string) ($matches[1] ?? '');
+        if (!$this->isValidDate($date)) {
+            throw new RuntimeException('Eine Backup-Datei enthält ein ungültiges Datum.');
+        }
+
+        return $date;
+    }
+
     private function buildDashboardCharts(array $entries): array
     {
         $recent = array_slice($entries, -30);

src/Domain/EntryRepository.php

@@ -4,6 +4,13 @@ declare(strict_types=1);
 
 final class EntryRepository
 {
+    private EntryCrypto $crypto;
+
+    public function __construct()
+    {
+        $this->crypto = new EntryCrypto();
+    }
+
     public function save(string $username, string $date, array $entry, array $evaluation): void
     {
         $path = $this->pathFor($username, $date);
@@ -13,7 +20,8 @@ final class EntryRepository
             mkdir($directory, 0775, true);
         }
 
-        file_put_contents($path, $this->toMarkdown($username, $date, $entry, $evaluation));
+        $markdown = $this->toMarkdown($username, $date, $entry, $evaluation);
+        file_put_contents($path, $this->crypto->encrypt($markdown), LOCK_EX);
     }
 
     public function find(string $username, string $date): ?array
@@ -24,7 +32,14 @@ final class EntryRepository
             return null;
         }
 
-        return $this->parse((string) file_get_contents($path), $date);
+        $content = (string) file_get_contents($path);
+        $plaintext = $this->crypto->decrypt($content);
+
+        if ($this->crypto->shouldEncrypt() && !$this->crypto->isEncrypted($content)) {
+            file_put_contents($path, $this->crypto->encrypt($plaintext), LOCK_EX);
+        }
+
+        return $this->parse($plaintext, $date);
     }
 
     public function all(string $username): array
@@ -41,7 +56,14 @@ final class EntryRepository
         $entries = [];
         foreach ($files as $file) {
             $date = basename($file, '.txt');
-            $parsed = $this->parse((string) file_get_contents($file), $date);
+            $content = (string) file_get_contents($file);
+            $plaintext = $this->crypto->decrypt($content);
+
+            if ($this->crypto->shouldEncrypt() && !$this->crypto->isEncrypted($content)) {
+                file_put_contents($file, $this->crypto->encrypt($plaintext), LOCK_EX);
+            }
+
+            $parsed = $this->parse($plaintext, $date);
             if ($parsed !== null) {
                 $entries[] = $parsed;
             }
@@ -50,6 +72,18 @@ final class EntryRepository
         return $entries;
     }
 
+    public function parseMarkdown(string $content, string $fallbackDate): ?array
+    {
+        $plaintext = $this->crypto->decrypt($content);
+
+        return $this->parse($plaintext, $fallbackDate);
+    }
+
+    public function exportMarkdown(string $username, string $date, array $entry, array $evaluation): string
+    {
+        return $this->toMarkdown($username, $date, $entry, $evaluation);
+    }
+
     private function directoryFor(string $username): string
     {
         return storage_path('users/' . normalize_username($username) . '/days');

src/Support/EntryCrypto.php

@@ -0,0 +1,140 @@
+<?php
+
+declare(strict_types=1);
+
+final class EntryCrypto
+{
+    private const HEADER = "MOODENC1\n";
+
+    private string $fallbackKeyPath;
+
+    public function __construct()
+    {
+        $this->fallbackKeyPath = storage_path('system/entry-encryption.key');
+    }
+
+    public function isAvailable(): bool
+    {
+        return function_exists('openssl_encrypt')
+            && function_exists('openssl_decrypt')
+            && function_exists('random_bytes');
+    }
+
+    public function shouldEncrypt(): bool
+    {
+        return $this->isAvailable();
+    }
+
+    public function isEncrypted(string $content): bool
+    {
+        return str_starts_with($content, self::HEADER);
+    }
+
+    public function encrypt(string $plaintext): string
+    {
+        if (!$this->shouldEncrypt()) {
+            return $plaintext;
+        }
+
+        $iv = random_bytes(12);
+        $tag = '';
+        $ciphertext = openssl_encrypt(
+            $plaintext,
+            'aes-256-gcm',
+            $this->key(),
+            OPENSSL_RAW_DATA,
+            $iv,
+            $tag
+        );
+
+        if (!is_string($ciphertext) || $tag === '') {
+            throw new RuntimeException('Die Tagesdatei konnte nicht verschlüsselt werden.');
+        }
+
+        $payload = json_encode([
+            'iv' => base64_encode($iv),
+            'tag' => base64_encode($tag),
+            'data' => base64_encode($ciphertext),
+        ], JSON_UNESCAPED_SLASHES);
+
+        if (!is_string($payload)) {
+            throw new RuntimeException('Die verschlüsselte Tagesdatei konnte nicht kodiert werden.');
+        }
+
+        return self::HEADER . $payload;
+    }
+
+    public function decrypt(string $content): string
+    {
+        if (!$this->isEncrypted($content) || !$this->shouldEncrypt()) {
+            return $content;
+        }
+
+        $payload = substr($content, strlen(self::HEADER));
+        $decoded = json_decode($payload, true);
+
+        if (
+            !is_array($decoded)
+            || !is_string($decoded['iv'] ?? null)
+            || !is_string($decoded['tag'] ?? null)
+            || !is_string($decoded['data'] ?? null)
+        ) {
+            throw new RuntimeException('Die verschlüsselte Tagesdatei ist ungültig.');
+        }
+
+        $plaintext = openssl_decrypt(
+            (string) base64_decode($decoded['data'], true),
+            'aes-256-gcm',
+            $this->key(),
+            OPENSSL_RAW_DATA,
+            (string) base64_decode($decoded['iv'], true),
+            (string) base64_decode($decoded['tag'], true)
+        );
+
+        if (!is_string($plaintext)) {
+            throw new RuntimeException('Die Tagesdatei konnte nicht entschlüsselt werden.');
+        }
+
+        return $plaintext;
+    }
+
+    private function key(): string
+    {
+        $configured = trim((string) ($_ENV['MOOD_STORAGE_KEY'] ?? getenv('MOOD_STORAGE_KEY') ?: ''));
+        if ($configured !== '') {
+            return hash('sha256', $configured, true);
+        }
+
+        $stored = $this->readFallbackKey();
+        if ($stored !== null) {
+            return $stored;
+        }
+
+        $raw = random_bytes(32);
+        $directory = dirname($this->fallbackKeyPath);
+        if (!is_dir($directory)) {
+            mkdir($directory, 0775, true);
+        }
+
+        file_put_contents($this->fallbackKeyPath, base64_encode($raw), LOCK_EX);
+        @chmod($this->fallbackKeyPath, 0600);
+
+        return $raw;
+    }
+
+    private function readFallbackKey(): ?string
+    {
+        if (!is_file($this->fallbackKeyPath)) {
+            return null;
+        }
+
+        $raw = trim((string) file_get_contents($this->fallbackKeyPath));
+        if ($raw === '') {
+            return null;
+        }
+
+        $decoded = base64_decode($raw, true);
+
+        return is_string($decoded) && strlen($decoded) === 32 ? $decoded : null;
+    }
+}

src/bootstrap.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 require __DIR__ . '/helpers.php';
 require __DIR__ . '/Support/Defaults.php';
 require __DIR__ . '/Support/Auth.php';
+require __DIR__ . '/Support/EntryCrypto.php';
 require __DIR__ . '/Support/View.php';
 require __DIR__ . '/Support/WebPushService.php';
 require __DIR__ . '/Domain/UserRepository.php';

src/helpers.php

@@ -352,6 +352,37 @@ function base64url_decode(string $data): string
     return $decoded;
 }
 
+function uploaded_files(string $field): array
+{
+    $raw = $_FILES[$field] ?? null;
+    if (!is_array($raw) || !isset($raw['name'])) {
+        return [];
+    }
+
+    if (!is_array($raw['name'])) {
+        return [[
+            'name' => (string) ($raw['name'] ?? ''),
+            'type' => (string) ($raw['type'] ?? ''),
+            'tmp_name' => (string) ($raw['tmp_name'] ?? ''),
+            'error' => (int) ($raw['error'] ?? UPLOAD_ERR_NO_FILE),
+            'size' => (int) ($raw['size'] ?? 0),
+        ]];
+    }
+
+    $files = [];
+    foreach ($raw['name'] as $index => $name) {
+        $files[] = [
+            'name' => (string) ($name ?? ''),
+            'type' => (string) ($raw['type'][$index] ?? ''),
+            'tmp_name' => (string) ($raw['tmp_name'][$index] ?? ''),
+            'error' => (int) ($raw['error'][$index] ?? UPLOAD_ERR_NO_FILE),
+            'size' => (int) ($raw['size'][$index] ?? 0),
+        ];
+    }
+
+    return $files;
+}
+
 function normalize_sport_type_id(string $value): string
 {
     $value = trim(strtr($value, [

templates/layout.php

@@ -114,7 +114,7 @@ $brandSubtitle = match ($page) {
             <?= $content ?>
 
             <footer class="site-footer glass-panel">
-                <a class="site-footer__link" href="https://git.hnz.io/hnzio/mood-tracking/releases" target="_blank" rel="noreferrer">Version 1.2.0</a>
+                <a class="site-footer__link" href="https://git.hnz.io/hnzio/mood-tracking/releases" target="_blank" rel="noreferrer">Version 1.2.1</a>
                 <a class="site-footer__link" href="https://hnz.io" target="_blank" rel="noreferrer">(c) 2026 @hnz.io</a>
             </footer>
         </main>

templates/pages/options.php

@@ -350,6 +350,32 @@
     </article>
 
     <aside class="stack-column">
+        <article class="glass-panel detail-card">
+            <p class="eyebrow">Backup</p>
+            <h3>Eigene Einträge sichern</h3>
+            <p class="helper-text">Deine Tagesdateien liegen auf dem Server verschlüsselt. Beim Download bekommst du automatisch ein lesbares Backup mit allen Tagen als `.txt`-Dateien in einer ZIP-Datei. Beim Import werden diese Dateien wieder still im Hintergrund geschützt gespeichert.</p>
+
+            <form method="post" action="/options" class="stack-form">
+                <?= csrf_field() ?>
+                <input type="hidden" name="form_name" value="export_backup">
+                <button class="primary-button" type="submit" <?= empty($backupAvailable) ? 'disabled' : '' ?>>Backup herunterladen</button>
+                <?php if (empty($backupAvailable)): ?>
+                    <p class="helper-text">Auf diesem Server fehlt gerade die ZIP-Erweiterung für den Download.</p>
+                <?php endif; ?>
+            </form>
+
+            <form method="post" action="/options" enctype="multipart/form-data" class="stack-form">
+                <?= csrf_field() ?>
+                <input type="hidden" name="form_name" value="import_backup">
+                <label>
+                    <span>Backup importieren</span>
+                    <input type="file" name="backup_files[]" accept=".zip,.txt" multiple>
+                </label>
+                <p class="helper-text">Du kannst ein komplettes ZIP-Backup oder einzelne Tagesdateien wie `2026-04-13.txt` importieren. Vorhandene Tage mit demselben Datum werden dabei aktualisiert.</p>
+                <button class="ghost-button" type="submit">Backup importieren</button>
+            </form>
+        </article>
+
         <article class="glass-panel detail-card">
             <p class="eyebrow">Sicherheit</p>
             <h3>Passwort ändern</h3>