📝 'feat(database): Implement database backup on demand and immediate'

backend/app/database_schema_migration.py

@@ -1 +1,380 @@
- 
+#!/usr/bin/env python3
+"""
+Umfassendes Datenbank-Schema-Migrationsskript
+Erkennt und fügt alle fehlenden Spalten basierend auf den Models hinzu.
+"""
+
+import os
+import sys
+import sqlite3
+from datetime import datetime
+import logging
+
+# Pfad zur App hinzufügen
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+from config.settings import DATABASE_PATH
+from utils.logging_config import get_logger
+
+logger = get_logger("schema_migration")
+
+def get_table_columns(cursor, table_name):
+    """Ermittelt alle Spalten einer Tabelle."""
+    cursor.execute(f"PRAGMA table_info({table_name})")
+    return {row[1]: row[2] for row in cursor.fetchall()}  # {column_name: column_type}
+
+def get_table_exists(cursor, table_name):
+    """Prüft, ob eine Tabelle existiert."""
+    cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name=?", (table_name,))
+    return cursor.fetchone() is not None
+
+def migrate_users_table(cursor):
+    """Migriert die users Tabelle für fehlende Spalten."""
+    logger.info("Migriere users Tabelle...")
+    
+    if not get_table_exists(cursor, 'users'):
+        logger.warning("users Tabelle existiert nicht - wird bei init_db erstellt")
+        return False
+    
+    existing_columns = get_table_columns(cursor, 'users')
+    
+    # Definition der erwarteten Spalten
+    required_columns = {
+        'id': 'INTEGER PRIMARY KEY',
+        'email': 'VARCHAR(120) UNIQUE NOT NULL',
+        'username': 'VARCHAR(100) UNIQUE NOT NULL',
+        'password_hash': 'VARCHAR(128) NOT NULL',
+        'name': 'VARCHAR(100) NOT NULL',
+        'role': 'VARCHAR(20) DEFAULT "user"',
+        'active': 'BOOLEAN DEFAULT 1',
+        'created_at': 'DATETIME DEFAULT CURRENT_TIMESTAMP',
+        'last_login': 'DATETIME',
+        'updated_at': 'DATETIME DEFAULT CURRENT_TIMESTAMP',
+        'settings': 'TEXT',
+        'department': 'VARCHAR(100)',
+        'position': 'VARCHAR(100)',
+        'phone': 'VARCHAR(50)',
+        'bio': 'TEXT'
+    }
+    
+    migrations_performed = []
+    
+    for column_name, column_def in required_columns.items():
+        if column_name not in existing_columns:
+            try:
+                # Spezielle Behandlung für updated_at mit Trigger
+                if column_name == 'updated_at':
+                    cursor.execute(f"ALTER TABLE users ADD COLUMN {column_name} DATETIME DEFAULT CURRENT_TIMESTAMP")
+                    # Trigger für automatische Aktualisierung
+                    cursor.execute("""
+                        CREATE TRIGGER IF NOT EXISTS update_users_updated_at 
+                        AFTER UPDATE ON users
+                        BEGIN
+                            UPDATE users SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+                        END
+                    """)
+                    logger.info(f"Spalte '{column_name}' hinzugefügt mit Auto-Update-Trigger")
+                else:
+                    cursor.execute(f"ALTER TABLE users ADD COLUMN {column_name} {column_def}")
+                    logger.info(f"Spalte '{column_name}' hinzugefügt")
+                
+                migrations_performed.append(column_name)
+            except Exception as e:
+                logger.error(f"Fehler beim Hinzufügen der Spalte '{column_name}': {str(e)}")
+    
+    return len(migrations_performed) > 0
+
+def migrate_printers_table(cursor):
+    """Migriert die printers Tabelle für fehlende Spalten."""
+    logger.info("Migriere printers Tabelle...")
+    
+    if not get_table_exists(cursor, 'printers'):
+        logger.warning("printers Tabelle existiert nicht - wird bei init_db erstellt")
+        return False
+    
+    existing_columns = get_table_columns(cursor, 'printers')
+    
+    required_columns = {
+        'id': 'INTEGER PRIMARY KEY',
+        'name': 'VARCHAR(100) NOT NULL',
+        'model': 'VARCHAR(100)',
+        'location': 'VARCHAR(100)',
+        'ip_address': 'VARCHAR(50)',
+        'mac_address': 'VARCHAR(50) NOT NULL UNIQUE',
+        'plug_ip': 'VARCHAR(50) NOT NULL',
+        'plug_username': 'VARCHAR(100) NOT NULL',
+        'plug_password': 'VARCHAR(100) NOT NULL',
+        'status': 'VARCHAR(20) DEFAULT "offline"',
+        'active': 'BOOLEAN DEFAULT 1',
+        'created_at': 'DATETIME DEFAULT CURRENT_TIMESTAMP',
+        'last_checked': 'DATETIME'
+    }
+    
+    migrations_performed = []
+    
+    for column_name, column_def in required_columns.items():
+        if column_name not in existing_columns:
+            try:
+                cursor.execute(f"ALTER TABLE printers ADD COLUMN {column_name} {column_def}")
+                logger.info(f"Spalte '{column_name}' zu printers hinzugefügt")
+                migrations_performed.append(column_name)
+            except Exception as e:
+                logger.error(f"Fehler beim Hinzufügen der Spalte '{column_name}' zu printers: {str(e)}")
+    
+    return len(migrations_performed) > 0
+
+def migrate_jobs_table(cursor):
+    """Migriert die jobs Tabelle für fehlende Spalten."""
+    logger.info("Migriere jobs Tabelle...")
+    
+    if not get_table_exists(cursor, 'jobs'):
+        logger.warning("jobs Tabelle existiert nicht - wird bei init_db erstellt")
+        return False
+    
+    existing_columns = get_table_columns(cursor, 'jobs')
+    
+    required_columns = {
+        'id': 'INTEGER PRIMARY KEY',
+        'name': 'VARCHAR(200) NOT NULL',
+        'description': 'VARCHAR(500)',
+        'user_id': 'INTEGER NOT NULL',
+        'printer_id': 'INTEGER NOT NULL',
+        'start_at': 'DATETIME',
+        'end_at': 'DATETIME',
+        'actual_end_time': 'DATETIME',
+        'status': 'VARCHAR(20) DEFAULT "scheduled"',
+        'created_at': 'DATETIME DEFAULT CURRENT_TIMESTAMP',
+        'notes': 'VARCHAR(500)',
+        'material_used': 'FLOAT',
+        'file_path': 'VARCHAR(500)',
+        'owner_id': 'INTEGER',
+        'duration_minutes': 'INTEGER NOT NULL'
+    }
+    
+    migrations_performed = []
+    
+    for column_name, column_def in required_columns.items():
+        if column_name not in existing_columns:
+            try:
+                cursor.execute(f"ALTER TABLE jobs ADD COLUMN {column_name} {column_def}")
+                logger.info(f"Spalte '{column_name}' zu jobs hinzugefügt")
+                migrations_performed.append(column_name)
+            except Exception as e:
+                logger.error(f"Fehler beim Hinzufügen der Spalte '{column_name}' zu jobs: {str(e)}")
+    
+    return len(migrations_performed) > 0
+
+def migrate_guest_requests_table(cursor):
+    """Migriert die guest_requests Tabelle für fehlende Spalten."""
+    logger.info("Migriere guest_requests Tabelle...")
+    
+    if not get_table_exists(cursor, 'guest_requests'):
+        logger.warning("guest_requests Tabelle existiert nicht - wird bei init_db erstellt")
+        return False
+    
+    existing_columns = get_table_columns(cursor, 'guest_requests')
+    
+    required_columns = {
+        'processed_by': 'INTEGER',
+        'processed_at': 'DATETIME',
+        'approval_notes': 'TEXT',
+        'rejection_reason': 'TEXT',
+        'otp_used_at': 'DATETIME'
+    }
+    
+    migrations_performed = []
+    
+    for column_name, column_def in required_columns.items():
+        if column_name not in existing_columns:
+            try:
+                cursor.execute(f"ALTER TABLE guest_requests ADD COLUMN {column_name} {column_def}")
+                logger.info(f"Spalte '{column_name}' zu guest_requests hinzugefügt")
+                migrations_performed.append(column_name)
+            except Exception as e:
+                logger.error(f"Fehler beim Hinzufügen der Spalte '{column_name}' zu guest_requests: {str(e)}")
+    
+    return len(migrations_performed) > 0
+
+def create_missing_tables(cursor):
+    """Erstellt fehlende Tabellen."""
+    logger.info("Prüfe auf fehlende Tabellen...")
+    
+    # user_permissions Tabelle
+    if not get_table_exists(cursor, 'user_permissions'):
+        cursor.execute("""
+            CREATE TABLE user_permissions (
+                user_id INTEGER PRIMARY KEY,
+                can_start_jobs BOOLEAN DEFAULT 0,
+                needs_approval BOOLEAN DEFAULT 1,
+                can_approve_jobs BOOLEAN DEFAULT 0,
+                FOREIGN KEY (user_id) REFERENCES users (id)
+            )
+        """)
+        logger.info("Tabelle 'user_permissions' erstellt")
+    
+    # notifications Tabelle
+    if not get_table_exists(cursor, 'notifications'):
+        cursor.execute("""
+            CREATE TABLE notifications (
+                id INTEGER PRIMARY KEY,
+                user_id INTEGER NOT NULL,
+                type VARCHAR(50) NOT NULL,
+                payload TEXT,
+                created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                read BOOLEAN DEFAULT 0,
+                FOREIGN KEY (user_id) REFERENCES users (id)
+            )
+        """)
+        logger.info("Tabelle 'notifications' erstellt")
+    
+    # stats Tabelle
+    if not get_table_exists(cursor, 'stats'):
+        cursor.execute("""
+            CREATE TABLE stats (
+                id INTEGER PRIMARY KEY,
+                total_print_time INTEGER DEFAULT 0,
+                total_jobs_completed INTEGER DEFAULT 0,
+                total_material_used FLOAT DEFAULT 0.0,
+                last_updated DATETIME DEFAULT CURRENT_TIMESTAMP
+            )
+        """)
+        logger.info("Tabelle 'stats' erstellt")
+    
+    # system_logs Tabelle
+    if not get_table_exists(cursor, 'system_logs'):
+        cursor.execute("""
+            CREATE TABLE system_logs (
+                id INTEGER PRIMARY KEY,
+                timestamp DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL,
+                level VARCHAR(20) NOT NULL,
+                message VARCHAR(1000) NOT NULL,
+                module VARCHAR(100),
+                user_id INTEGER,
+                ip_address VARCHAR(50),
+                user_agent VARCHAR(500),
+                FOREIGN KEY (user_id) REFERENCES users (id)
+            )
+        """)
+        logger.info("Tabelle 'system_logs' erstellt")
+
+def optimize_database(cursor):
+    """Führt Datenbankoptimierungen durch."""
+    logger.info("Führe Datenbankoptimierungen durch...")
+    
+    try:
+        # Indices für bessere Performance
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_users_email ON users(email)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_users_username ON users(username)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_jobs_user_id ON jobs(user_id)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_jobs_printer_id ON jobs(printer_id)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_jobs_status ON jobs(status)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_notifications_user_id ON notifications(user_id)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_system_logs_timestamp ON system_logs(timestamp)")
+        cursor.execute("CREATE INDEX IF NOT EXISTS idx_guest_requests_status ON guest_requests(status)")
+        
+        # Statistiken aktualisieren
+        cursor.execute("ANALYZE")
+        
+        logger.info("Datenbankoptimierungen abgeschlossen")
+        
+    except Exception as e:
+        logger.error(f"Fehler bei Datenbankoptimierungen: {str(e)}")
+
+def main():
+    """Führt die komplette Schema-Migration aus."""
+    try:
+        logger.info("Starte umfassende Datenbank-Schema-Migration...")
+        
+        # Verbindung zur Datenbank
+        if not os.path.exists(DATABASE_PATH):
+            logger.error(f"Datenbankdatei nicht gefunden: {DATABASE_PATH}")
+            # Erste Initialisierung
+            from models import init_database
+            logger.info("Führe Erstinitialisierung durch...")
+            init_database()
+            logger.info("Erstinitialisierung abgeschlossen")
+            return
+        
+        conn = sqlite3.connect(DATABASE_PATH)
+        cursor = conn.cursor()
+        
+        # WAL-Modus aktivieren für bessere Concurrent-Performance
+        cursor.execute("PRAGMA journal_mode=WAL")
+        cursor.execute("PRAGMA foreign_keys=ON")
+        
+        logger.info(f"Verbunden mit Datenbank: {DATABASE_PATH}")
+        
+        # Backup erstellen
+        backup_path = f"{DATABASE_PATH}.backup_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
+        cursor.execute(f"VACUUM INTO '{backup_path}'")
+        logger.info(f"Backup erstellt: {backup_path}")
+        
+        # Migrationen durchführen
+        migrations_performed = []
+        
+        # Fehlende Tabellen erstellen
+        create_missing_tables(cursor)
+        migrations_performed.append("missing_tables")
+        
+        # Tabellen-spezifische Migrationen
+        if migrate_users_table(cursor):
+            migrations_performed.append("users")
+        
+        if migrate_printers_table(cursor):
+            migrations_performed.append("printers")
+        
+        if migrate_jobs_table(cursor):
+            migrations_performed.append("jobs")
+        
+        if migrate_guest_requests_table(cursor):
+            migrations_performed.append("guest_requests")
+        
+        # Optimierungen
+        optimize_database(cursor)
+        migrations_performed.append("optimizations")
+        
+        # Änderungen speichern
+        conn.commit()
+        conn.close()
+        
+        logger.info(f"Schema-Migration erfolgreich abgeschlossen. Migrierte Bereiche: {', '.join(migrations_performed)}")
+        
+        # Test der Migration
+        test_migration()
+        
+    except Exception as e:
+        logger.error(f"Fehler bei der Schema-Migration: {str(e)}")
+        if 'conn' in locals():
+            conn.rollback()
+            conn.close()
+        sys.exit(1)
+
+def test_migration():
+    """Testet die Migration durch Laden der Models."""
+    try:
+        logger.info("Teste Migration durch Laden der Models...")
+        
+        # Models importieren und testen
+        from models import get_cached_session, User, Printer, Job
+        
+        with get_cached_session() as session:
+            # Test User-Query (sollte das updated_at Problem lösen)
+            users = session.query(User).limit(1).all()
+            logger.info(f"User-Abfrage erfolgreich - {len(users)} Benutzer gefunden")
+            
+            # Test Printer-Query
+            printers = session.query(Printer).limit(1).all()
+            logger.info(f"Printer-Abfrage erfolgreich - {len(printers)} Drucker gefunden")
+            
+            # Test Job-Query
+            jobs = session.query(Job).limit(1).all()
+            logger.info(f"Job-Abfrage erfolgreich - {len(jobs)} Jobs gefunden")
+        
+        logger.info("Migrations-Test erfolgreich abgeschlossen")
+        
+    except Exception as e:
+        logger.error(f"Fehler beim Migrations-Test: {str(e)}")
+        raise
+
+if __name__ == "__main__":
+    main() 

backend/app/fix_database_immediate.py

@@ -0,0 +1,253 @@
+#!/usr/bin/env python3
+"""
+Sofortige Datenbank-Reparatur für fehlende updated_at Spalte
+"""
+
+import os
+import sys
+import sqlite3
+from datetime import datetime
+
+# Pfad zur App hinzufügen
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+from config.settings import DATABASE_PATH
+
+def fix_users_table_immediate():
+    """Repariert die users Tabelle sofort."""
+    print(f"Repariere Datenbank: {DATABASE_PATH}")
+    
+    if not os.path.exists(DATABASE_PATH):
+        print(f"Datenbankdatei nicht gefunden: {DATABASE_PATH}")
+        return False
+    
+    try:
+        conn = sqlite3.connect(DATABASE_PATH)
+        cursor = conn.cursor()
+        
+        # Prüfen, welche Spalten existieren
+        cursor.execute("PRAGMA table_info(users)")
+        existing_columns = [row[1] for row in cursor.fetchall()]
+        print(f"Vorhandene Spalten in users: {existing_columns}")
+        
+        # Fehlende Spalten hinzufügen
+        required_columns = [
+            ('updated_at', 'DATETIME'),
+            ('settings', 'TEXT'),
+            ('department', 'VARCHAR(100)'),
+            ('position', 'VARCHAR(100)'),
+            ('phone', 'VARCHAR(50)'),
+            ('bio', 'TEXT')
+        ]
+        
+        for column_name, column_type in required_columns:
+            if column_name not in existing_columns:
+                try:
+                    if column_name == 'updated_at':
+                        # Einfacher Ansatz: NULL erlauben und später updaten
+                        cursor.execute(f"ALTER TABLE users ADD COLUMN {column_name} {column_type}")
+                        print(f"✓ Spalte '{column_name}' hinzugefügt")
+                        
+                        # Alle vorhandenen Benutzer mit aktuellem Timestamp updaten
+                        cursor.execute(f"UPDATE users SET {column_name} = CURRENT_TIMESTAMP WHERE {column_name} IS NULL")
+                        print(f"✓ Vorhandene Benutzer mit {column_name} aktualisiert")
+                        
+                        # Trigger für automatische Updates erstellen
+                        cursor.execute("""
+                            CREATE TRIGGER IF NOT EXISTS update_users_updated_at 
+                            AFTER UPDATE ON users
+                            FOR EACH ROW
+                            BEGIN
+                                UPDATE users SET updated_at = CURRENT_TIMESTAMP WHERE id = NEW.id;
+                            END
+                        """)
+                        print(f"✓ Auto-Update-Trigger für {column_name} erstellt")
+                    else:
+                        cursor.execute(f"ALTER TABLE users ADD COLUMN {column_name} {column_type}")
+                        print(f"✓ Spalte '{column_name}' hinzugefügt")
+                        
+                except Exception as e:
+                    print(f"✗ Fehler bei Spalte '{column_name}': {str(e)}")
+            else:
+                print(f"○ Spalte '{column_name}' bereits vorhanden")
+        
+        # Weitere fehlende Tabellen prüfen und erstellen
+        create_missing_tables(cursor)
+        
+        # Optimierungsindizes erstellen
+        create_performance_indexes(cursor)
+        
+        conn.commit()
+        conn.close()
+        
+        print("✓ Datenbank-Reparatur erfolgreich abgeschlossen")
+        return True
+        
+    except Exception as e:
+        print(f"✗ Fehler bei der Datenbank-Reparatur: {str(e)}")
+        if 'conn' in locals():
+            conn.rollback()
+            conn.close()
+        return False
+
+def create_missing_tables(cursor):
+    """Erstellt fehlende Tabellen."""
+    
+    # Prüfen, welche Tabellen existieren
+    cursor.execute("SELECT name FROM sqlite_master WHERE type='table'")
+    existing_tables = [row[0] for row in cursor.fetchall()]
+    print(f"Vorhandene Tabellen: {existing_tables}")
+    
+    # user_permissions Tabelle
+    if 'user_permissions' not in existing_tables:
+        cursor.execute("""
+            CREATE TABLE user_permissions (
+                user_id INTEGER PRIMARY KEY,
+                can_start_jobs BOOLEAN DEFAULT 0,
+                needs_approval BOOLEAN DEFAULT 1,
+                can_approve_jobs BOOLEAN DEFAULT 0,
+                FOREIGN KEY (user_id) REFERENCES users (id)
+            )
+        """)
+        print("✓ Tabelle 'user_permissions' erstellt")
+    
+    # notifications Tabelle
+    if 'notifications' not in existing_tables:
+        cursor.execute("""
+            CREATE TABLE notifications (
+                id INTEGER PRIMARY KEY,
+                user_id INTEGER NOT NULL,
+                type VARCHAR(50) NOT NULL,
+                payload TEXT,
+                created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                read BOOLEAN DEFAULT 0,
+                FOREIGN KEY (user_id) REFERENCES users (id)
+            )
+        """)
+        print("✓ Tabelle 'notifications' erstellt")
+    
+    # stats Tabelle
+    if 'stats' not in existing_tables:
+        cursor.execute("""
+            CREATE TABLE stats (
+                id INTEGER PRIMARY KEY,
+                total_print_time INTEGER DEFAULT 0,
+                total_jobs_completed INTEGER DEFAULT 0,
+                total_material_used REAL DEFAULT 0.0,
+                last_updated DATETIME DEFAULT CURRENT_TIMESTAMP
+            )
+        """)
+        print("✓ Tabelle 'stats' erstellt")
+        
+        # Initial stats record erstellen
+        cursor.execute("""
+            INSERT INTO stats (total_print_time, total_jobs_completed, total_material_used, last_updated)
+            VALUES (0, 0, 0.0, CURRENT_TIMESTAMP)
+        """)
+        print("✓ Initial-Statistiken erstellt")
+    
+    # system_logs Tabelle
+    if 'system_logs' not in existing_tables:
+        cursor.execute("""
+            CREATE TABLE system_logs (
+                id INTEGER PRIMARY KEY,
+                timestamp DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL,
+                level VARCHAR(20) NOT NULL,
+                message VARCHAR(1000) NOT NULL,
+                module VARCHAR(100),
+                user_id INTEGER,
+                ip_address VARCHAR(50),
+                user_agent VARCHAR(500),
+                FOREIGN KEY (user_id) REFERENCES users (id)
+            )
+        """)
+        print("✓ Tabelle 'system_logs' erstellt")
+
+def create_performance_indexes(cursor):
+    """Erstellt Performance-Indices."""
+    print("Erstelle Performance-Indices...")
+    
+    indexes = [
+        ("idx_users_email", "users(email)"),
+        ("idx_users_username", "users(username)"),
+        ("idx_users_role", "users(role)"),
+        ("idx_jobs_user_id", "jobs(user_id)"),
+        ("idx_jobs_printer_id", "jobs(printer_id)"),
+        ("idx_jobs_status", "jobs(status)"),
+        ("idx_jobs_start_at", "jobs(start_at)"),
+        ("idx_notifications_user_id", "notifications(user_id)"),
+        ("idx_notifications_read", "notifications(read)"),
+        ("idx_system_logs_timestamp", "system_logs(timestamp)"),
+        ("idx_system_logs_level", "system_logs(level)"),
+        ("idx_guest_requests_status", "guest_requests(status)"),
+        ("idx_printers_status", "printers(status)"),
+        ("idx_printers_active", "printers(active)")
+    ]
+    
+    for index_name, index_def in indexes:
+        try:
+            cursor.execute(f"CREATE INDEX IF NOT EXISTS {index_name} ON {index_def}")
+            print(f"✓ Index '{index_name}' erstellt")
+        except Exception as e:
+            print(f"○ Index '{index_name}': {str(e)}")
+
+def test_database_access():
+    """Testet den Datenbankzugriff nach der Reparatur."""
+    print("\nTeste Datenbankzugriff...")
+    
+    try:
+        # Models importieren und testen
+        from models import get_cached_session, User, Printer, Job
+        
+        with get_cached_session() as session:
+            # Test User-Query
+            users = session.query(User).limit(5).all()
+            print(f"✓ User-Abfrage erfolgreich - {len(users)} Benutzer gefunden")
+            
+            # Test Printer-Query
+            printers = session.query(Printer).limit(5).all()
+            print(f"✓ Printer-Abfrage erfolgreich - {len(printers)} Drucker gefunden")
+            
+            # Test Job-Query
+            jobs = session.query(Job).limit(5).all()
+            print(f"✓ Job-Abfrage erfolgreich - {len(jobs)} Jobs gefunden")
+        
+        print("✓ Alle Datenbank-Tests erfolgreich!")
+        return True
+        
+    except Exception as e:
+        print(f"✗ Datenbank-Test fehlgeschlagen: {str(e)}")
+        return False
+
+def main():
+    """Hauptfunktion für die sofortige Datenbank-Reparatur."""
+    print("=== SOFORTIGE DATENBANK-REPARATUR ===")
+    print(f"Zeitstempel: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}")
+    print(f"Datenbank: {DATABASE_PATH}")
+    print()
+    
+    # Backup erstellen
+    if os.path.exists(DATABASE_PATH):
+        backup_path = f"{DATABASE_PATH}.backup_immediate_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
+        try:
+            import shutil
+            shutil.copy2(DATABASE_PATH, backup_path)
+            print(f"✓ Backup erstellt: {backup_path}")
+        except Exception as e:
+            print(f"⚠ Backup-Erstellung fehlgeschlagen: {str(e)}")
+    
+    # Reparatur durchführen
+    if fix_users_table_immediate():
+        print("\n=== DATENBANK-TEST ===")
+        if test_database_access():
+            print("\n🎉 DATENBANK-REPARATUR ERFOLGREICH!")
+            print("Die Anwendung sollte jetzt funktionieren.")
+        else:
+            print("\n❌ DATENBANK-TEST FEHLGESCHLAGEN!")
+            print("Weitere Diagnose erforderlich.")
+    else:
+        print("\n❌ DATENBANK-REPARATUR FEHLGESCHLAGEN!")
+        print("Manuelle Intervention erforderlich.")
+
+if __name__ == "__main__":
+    main() 

backend/app/templates/printers.html

@@ -1,85 +1,143 @@
 {% extends "base.html" %}
 
-{% block title %}Drucker - MYP Platform{% endblock %}
+{% block title %}Drucker - Mercedes-Benz MYP Platform{% endblock %}
-
-{% block extra_css %}
-<link href="{{ url_for('static', filename='css/printers.css') }}" rel="stylesheet">
-{% endblock %}
 
 {% block content %}
-<div class="max-w-7xl mx-auto px-3 sm:px-6 lg:px-8 py-4 sm:py-8">
+<div class="bg-professional">
-    <!-- Header mit Status-Übersicht - Neu gestaltet -->
+    
-    <div class="mb-6 sm:mb-10">
+    <!-- Professional Hero Header -->
-        <div class="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
+    <div class="professional-hero hero-pattern animate-fade-in">
-            <div class="mb-4 sm:mb-0">
+        <div class="absolute inset-0 bg-gradient-to-r from-black/10 to-black/20 dark:from-black/20 dark:to-black/40"></div>
-                <h1 class="text-2xl sm:text-3xl font-bold text-slate-900 dark:text-white mb-2">Drucker</h1>
+        
-                <p class="text-sm sm:text-base text-slate-600 dark:text-slate-400">Verwalten Sie Ihre 3D-Drucker</p>
+        <!-- Status Indicator -->
-                
+        <div class="absolute top-6 right-6 flex items-center space-x-3 z-10">
-                <!-- Live-Status-Übersicht - Neu gestaltet -->
+            <div class="mb-glass rounded-full px-4 py-2 animate-scale-in">
-                <div id="status-overview" class="status-overview-new mt-3">
+                <div class="flex items-center space-x-2">
-                    <div class="flex items-center space-x-2">
+                    <div class="status-dot status-online"></div>
-                        <div class="status-dot online"></div>
+                    <span class="text-sm font-semibold text-professional-primary">Live</span>
-                        <span class="text-slate-700 dark:text-slate-300">Online: <span id="online-count" class="font-semibold text-green-600 dark:text-green-400">-</span></span>
-                    </div>
-                    <div class="flex items-center space-x-2">
-                        <div class="status-dot offline"></div>
-                        <span class="text-slate-700 dark:text-slate-300">Offline: <span id="offline-count" class="font-semibold text-red-600 dark:text-red-400">-</span></span>
-                    </div>
-                    <div class="flex items-center space-x-2">
-                        <svg class="w-2.5 h-2.5 text-blue-500" fill="currentColor" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg">
-                            <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.828 2.829a1 1 0 101.415-1.415L11 9.586V6z" clip-rule="evenodd"></path>
-                        </svg>
-                        <span class="text-slate-700 dark:text-slate-300">Gesamt: <span id="total-count" class="font-semibold text-blue-600 dark:text-blue-400">-</span></span>
-                    </div>
-                    <div class="flex items-center space-x-2 ml-2">
-                        <svg id="auto-refresh-icon" class="w-3 h-3 text-slate-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
-                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
-                        </svg>
-                        <span class="text-xs text-slate-500 dark:text-slate-400">Auto-Update: <span id="next-update-time" class="font-mono">-</span>s</span>
-                    </div>
                 </div>
             </div>
-            <div class="flex flex-wrap gap-3">
+            <div class="mb-glass rounded-full px-4 py-2 animate-scale-in">
-                <!-- Filter-Buttons - Neu gestaltet -->
+                <span id="live-time" class="text-sm font-semibold text-professional-primary"></span>
-                <div class="filter-bar-new">
+            </div>
-                    <button id="filter-all" class="filter-btn-new active">Alle</button>
+        </div>
-                    <button id="filter-online" class="filter-btn-new">Online</button>
+        
-                    <button id="filter-offline" class="filter-btn-new">Offline</button>
+        <div class="relative max-w-7xl mx-auto px-6 lg:px-8 py-16 z-10">
+            <div class="text-center animate-slide-up">
+                <!-- Mercedes-Benz Logo -->
+                <div class="inline-flex items-center justify-center w-24 h-24 mb-glass rounded-full mb-8 professional-shadow">
+                    <svg class="w-12 h-12 text-professional-primary" viewBox="0 0 80 80" fill="currentColor">
+                        <path d="M58.6,4.5C53,1.6,46.7,0,40,0c-6.7,0-13,1.6-18.6,4.5v0C8.7,11.2,0,24.6,0,40c0,15.4,8.7,28.8,21.5,35.5
+                        C27,78.3,33.3,80,40,80c6.7,0,12.9-1.7,18.5-4.6C71.3,68.8,80,55.4,80,40C80,24.6,71.3,11.2,58.6,4.5z M4,40
+                        c0-13.1,7-24.5,17.5-30.9v0C26.6,6,32.5,4.2,39,4l-4.5,32.7L21.5,46.8v0L8.3,57.1C5.6,52,4,46.2,4,40z M58.6,70.8
+                        C53.1,74.1,46.8,76,40,76c-6.8,0-13.2-1.9-18.6-5.2c-4.9-2.9-8.9-6.9-11.9-11.7l11.9-4.9v0L40,46.6l18.6,7.5v0l12,4.9
+                        C67.6,63.9,63.4,67.9,58.6,70.8z M58.6,46.8L58.6,46.8l-12.9-10L41.1,4c6.3,0.2,12.3,2,17.4,5.1v0C69,15.4,76,26.9,76,40
+                        c0,6.2-1.5,12-4.3,17.1L58.6,46.8z"/>
+                    </svg>
                 </div>
                 
-                <button onclick="toggleAutoRefresh()" id="auto-refresh-btn" class="action-btn-new primary">
+                <h1 class="title-professional text-5xl md:text-6xl font-bold mb-6 tracking-tight">
-                    <svg class="h-4 w-4 sm:h-5 sm:w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                    3D-Drucker Management
-                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" />
+                </h1>
-                    </svg>
+                <p class="subtitle-professional text-xl md:text-2xl max-w-4xl mx-auto leading-relaxed mb-8">
-                    <span>Auto-Update</span>
+                    Verwalten Sie Ihre 3D-Drucker mit höchster Präzision und Mercedes-Benz Qualitätsstandard
-                </button>
+                </p>
                 
-                <button onclick="refreshPrinters()" class="action-btn-new primary">
+                <!-- Status Overview -->
-                    <svg class="h-4 w-4 sm:h-5 sm:w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                <div class="flex flex-wrap justify-center gap-6 mb-8">
-                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
+                    <div class="mb-glass rounded-2xl px-6 py-4 animate-scale-in">
-                    </svg>
+                        <div class="flex items-center space-x-3">
-                    <span>Jetzt aktualisieren</span>
+                            <div class="status-dot status-online"></div>
-                </button>
+                            <span class="text-professional-primary font-semibold">Online: <span id="online-count" class="text-green-500 font-bold">-</span></span>
+                        </div>
+                    </div>
+                    <div class="mb-glass rounded-2xl px-6 py-4 animate-scale-in">
+                        <div class="flex items-center space-x-3">
+                            <div class="status-dot status-offline"></div>
+                            <span class="text-professional-primary font-semibold">Offline: <span id="offline-count" class="text-red-500 font-bold">-</span></span>
+                        </div>
+                    </div>
+                    <div class="mb-glass rounded-2xl px-6 py-4 animate-scale-in">
+                        <div class="flex items-center space-x-3">
+                            <svg class="w-5 h-5 text-professional-primary" fill="currentColor" viewBox="0 0 20 20">
+                                <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.828 2.829a1 1 0 101.415-1.415L11 9.586V6z" clip-rule="evenodd"/>
+                            </svg>
+                            <span class="text-professional-primary font-semibold">Gesamt: <span id="total-count" class="text-professional-accent font-bold">-</span></span>
+                        </div>
+                    </div>
+                </div>
                 
-                {% if current_user.is_admin %}
+                <!-- Action Buttons -->
-                <button id="addPrinterBtn" class="action-btn-new success">
+                <div class="flex flex-wrap justify-center gap-4">
-                    <svg class="h-4 w-4 sm:h-5 sm:w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                    <!-- Filter Buttons -->
-                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
+                    <div class="flex bg-white/10 dark:bg-black/20 backdrop-blur-sm rounded-2xl p-2 border border-white/20 dark:border-white/10">
+                        <button id="filter-all" class="filter-btn-mercedes active px-4 py-2 rounded-xl text-sm font-semibold transition-all duration-300">
+                            Alle
+                        </button>
+                        <button id="filter-online" class="filter-btn-mercedes px-4 py-2 rounded-xl text-sm font-semibold transition-all duration-300">
+                            Online
+                        </button>
+                        <button id="filter-offline" class="filter-btn-mercedes px-4 py-2 rounded-xl text-sm font-semibold transition-all duration-300">
+                            Offline
+                        </button>
+                    </div>
+                    
+                    <button onclick="toggleAutoRefresh()" id="auto-refresh-btn" class="btn-professional group">
+                        <svg class="w-6 h-6 mr-3 group-hover:rotate-180 transition-transform duration-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"/>
+                        </svg>
+                        <span>Auto-Update</span>
+                    </button>
+                    
+                    <button onclick="refreshPrinters()" class="btn-professional group">
+                        <svg class="w-6 h-6 mr-3 group-hover:rotate-180 transition-transform duration-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/>
+                        </svg>
+                        <span>Jetzt aktualisieren</span>
+                    </button>
+                    
+                    {% if current_user.is_admin %}
+                    <button id="addPrinterBtn" class="btn-success-professional group">
+                        <svg class="w-6 h-6 mr-3 group-hover:scale-110 transition-transform duration-300" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6v6m0 0v6m0-6h6m-6 0H6"/>
+                        </svg>
+                        <span>Drucker hinzufügen</span>
+                    </button>
+                    {% endif %}
+                </div>
+                
+                <!-- Auto-Update Info -->
+                <div class="mt-6 flex items-center justify-center space-x-2 text-professional-muted">
+                    <svg id="auto-refresh-icon" class="w-4 h-4 animate-spin-slow" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/>
                     </svg>
-                    <span>Drucker hinzufügen</span>
+                    <span class="text-sm">Auto-Update: <span id="next-update-time" class="font-mono">-</span>s</span>
-                </button>
+                </div>
-                {% endif %}
             </div>
         </div>
     </div>
 
-    <!-- Printers Grid -->
+    <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 -mt-8 relative z-10 space-y-8">
-    <div id="printers-grid" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4 sm:gap-6">
+        
-        <!-- Loading state -->
+        <!-- Printers Grid -->
-        <div class="col-span-full text-center py-6 sm:py-12">
+        <div class="professional-container p-8 lg:p-12 animate-slide-up">
-            <div class="animate-spin rounded-full h-8 w-8 sm:h-12 sm:w-12 border-b-2 border-indigo-600 dark:border-indigo-400 mx-auto"></div>
+            <div class="text-center mb-10">
-            <p class="mt-3 sm:mt-4 text-sm sm:text-base text-slate-600 dark:text-slate-400">Lade Drucker...</p>
+                <h2 class="title-professional text-3xl font-bold mb-4">
-            <p class="mt-1 text-xs text-slate-500 dark:text-slate-500">Dies sollte nur wenige Sekunden dauern</p>
+                    Verfügbare Drucker
+                </h2>
+                <p class="subtitle-professional text-lg">
+                    Übersicht und Verwaltung Ihrer 3D-Drucker-Infrastruktur
+                </p>
+            </div>
+            
+            <div id="printers-grid" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+                <!-- Loading state -->
+                <div class="col-span-full text-center py-12">
+                    <div class="animate-spin rounded-full h-12 w-12 border-b-2 border-professional-accent mx-auto"></div>
+                    <p class="mt-4 text-base text-professional-secondary">Lade Drucker...</p>
+                    <p class="mt-1 text-sm text-professional-muted">Dies sollte nur wenige Sekunden dauern</p>
+                </div>
+            </div>
         </div>
     </div>
 </div>
@@ -1074,7 +1132,7 @@
     
     // Filter-Funktionalität
     function setupFilters() {
-        const filterButtons = document.querySelectorAll('.filter-btn-new');
+        const filterButtons = document.querySelectorAll('.filter-btn-mercedes');
         
         filterButtons.forEach(btn => {
             btn.addEventListener('click', function() {