Fix for the CRSF Token implementation

Web/modules/database/ausleihung.py

@@ -33,6 +33,8 @@ import json
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
 import Web.modules.inventarsystem.data_protection as dp
+import Web.modules.database.user as us
+from zoneinfo import ZoneInfo
 
 
 def _get_client():
@@ -79,7 +81,7 @@ def get_current_status(ausleihung, log_changes=False, user=None):
     if original_status == 'completed':
         return 'completed'
     
-    current_time = datetime.datetime.now()
+    current_time = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
     start_time = ausleihung.get('Start')
     end_time = ausleihung.get('End')
     
@@ -137,7 +139,7 @@ def create_backup_database():
             os.makedirs(backup_dir)
         
         # Aktuelles Datum für den Dateinamen
-        current_date = datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
+        current_date = datetime.datetime.now(ZoneInfo("Europe/Berlin")).strftime('%Y-%m-%d_%H-%M-%S')
         backup_file = os.path.join(backup_dir, f'ausleihungen_backup_{current_date}.json')
         
         # Ausleihungen abrufen und als JSON speichern
@@ -175,7 +177,7 @@ def create_backup_database():
         
         log_file = os.path.join(log_dir, 'ausleihungen_error.log')
         with open(log_file, 'a', encoding='utf-8') as f:
-            f.write(f"{datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S')}: Backup-Fehler: {str(e)}\n")
+            f.write(f"{datetime.datetime.now(ZoneInfo("Europe/Berlin")).strftime('%Y-%m-%d_%H-%M-%S')}: Backup-Fehler: {str(e)}\n")
         
         print(f"Fehler beim Erstellen des Backups: {e}")
         return False
@@ -183,7 +185,7 @@ def create_backup_database():
 
 # === AUSLEIHUNG MANAGEMENT ===
 
-def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="active", period=None, exemplar_data=None):
+def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="active", period=None, exemplar_data=None, due_date=None):
     """
     Add a new borrowing record for an item.
     
@@ -204,7 +206,7 @@ def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="a
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
         ausleihungen = db['ausleihungen']
-        
+
         ausleihung = {
             'Item': item_id,
             'User': dp.encrypt_text(user),
@@ -223,6 +225,9 @@ def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="a
             
         if exemplar_data:
             ausleihung['ExemplarData'] = exemplar_data
+
+        if due_date:
+            ausleihung['DueDate'] = due_date
         
         result = ausleihungen.insert_one(ausleihung)
         ausleihung_id = result.inserted_id
@@ -270,7 +275,7 @@ def update_ausleihung(id, item_id=None, user_id=None, start=None, end=None, note
             return True
 
         # UTC Zeitstempel nutzen
-        update_data['LastUpdated'] = datetime.datetime.now(datetime.timezone.utc)
+        update_data['LastUpdated'] = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
 
         result = ausleihungen.update_one(
             {'_id': doc_id},
@@ -300,7 +305,7 @@ def complete_ausleihung(id, end_time=None):
     """
     try:
         if end_time is None:
-            end_time = datetime.datetime.now()
+            end_time = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
@@ -312,7 +317,7 @@ def complete_ausleihung(id, end_time=None):
             {'$set': {
                 'End': end_time,
                 'Status': 'completed',
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
         
@@ -320,7 +325,7 @@ def complete_ausleihung(id, end_time=None):
             {'_id': ObjectId(id)},
             {'$set': {
                 'Verfuegbar': True,
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
 
@@ -351,7 +356,7 @@ def cancel_ausleihung(id):
             {'_id': ObjectId(id)},
             {'$set': {
                 'Status': 'cancelled',
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
 
@@ -376,7 +381,7 @@ def remove_ausleihung(id):
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
         ausleihungen = db['ausleihungen']
-        now = datetime.datetime.now()
+        now = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         result = ausleihungen.update_one(
             {'_id': ObjectId(id), 'Status': {'$ne': 'deleted'}},
             {'$set': {
@@ -770,7 +775,7 @@ def activate_ausleihung(id):
                 {'_id': doc_id, 'Status': 'planned'},
                 {'$set': {
                     'Status': 'active',
-                    'LastUpdated': datetime.datetime.now(datetime.timezone.utc)
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 }}
             )
             return result.modified_count > 0
@@ -794,7 +799,7 @@ def reset_item_completely(item_id):
                 return {'success': False, 'message': 'Item nicht gefunden'}
 
             item_name = item.get('Name', 'Unbekannt')
-            now_utc = datetime.datetime.now(datetime.timezone.utc)
+            now_utc = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
 
             # 1. Bulk update active borrowings
             update_res = ausleihungen_collection.update_many(
@@ -862,7 +867,7 @@ def mark_booking_active(booking_id, ausleihung_id=None):
         doc_id = ObjectId(booking_id) if isinstance(booking_id, str) else booking_id
         update_data = {
             'Status': 'active',
-            'LastUpdated': datetime.datetime.now(datetime.timezone.utc)
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
         if ausleihung_id:
             update_data['AusleihungId'] = ausleihung_id

Web/modules/database/items.py

@@ -26,6 +26,7 @@ import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
 import Web.modules.inventarsystem.data_protection as dp
 import logging
+from zoneinfo import ZoneInfo
 
 
 def is_library_item(item):
@@ -177,8 +178,8 @@ def add_item(name, ort, beschreibung, images=None, filter=None, filter2=None, fi
             'SeriesPosition': series_position,
             'IsGroupedSubItem': is_grouped_sub_item,
             'ParentItemId': parent_item_id,
-            'Created': datetime.datetime.now(),
-            'LastUpdated': datetime.datetime.now()
+            'Created': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
         result = items.insert_one(item)
         item_id = result.inserted_id
@@ -208,8 +209,8 @@ def remove_item(id):
             {'_id': ObjectId(id), 'Deleted': {'$ne': True}},
             {'$set': {
                 'Deleted': True,
-                'DeletedAt': datetime.datetime.now(),
-                'LastUpdated': datetime.datetime.now(),
+                'DeletedAt': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
                 'Verfuegbar': False,
             }}
         )
@@ -304,7 +305,7 @@ def update_item(id, name, ort, beschreibung, images, verfuegbar, filter1, filter
             'is_library': is_lib,
             'library_category': library_category,
             'Verfuegbar': bool(verfuegbar),
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         specific_update = shared_update.copy()
@@ -346,7 +347,7 @@ def update_item_status(id, verfuegbar, user=None):
 
         update_data = {
             'Verfuegbar': verfuegbar,
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         update_query = {'$set': update_data}
@@ -387,7 +388,7 @@ def update_item_exemplare_status(id, exemplare_status):
 
         update_data = {
             'ExemplareStatus': exemplare_status,
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         result = items.update_one(
@@ -734,7 +735,7 @@ def unstuck_item(id):
             {'$set': {
                 'Status': 'cancelled',
                 'CancelledReason': 'unstuck_reset',
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
 
@@ -745,7 +746,7 @@ def unstuck_item(id):
             {
                 '$set': {
                     'Verfuegbar': True,
-                    'LastUpdated': datetime.datetime.now()
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 },
                 '$unset': {'User': ""}
             }
@@ -1075,7 +1076,7 @@ def update_item_next_appointment(item_id, appointment_data):
         if appointment_data is None:
             update_query = {
                 '$unset': {'NextAppointment': ""},
-                '$set': {'LastUpdated': datetime.datetime.now()}
+                '$set': {'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))}
             }
         else:
             # Create a copy so we don't mutate the original dictionary passed in
@@ -1088,7 +1089,7 @@ def update_item_next_appointment(item_id, appointment_data):
             update_query = {
                 '$set': {
                     'NextAppointment': data_to_save,
-                    'LastUpdated': datetime.datetime.now()
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 }
             }
 
@@ -1121,7 +1122,7 @@ def clear_item_next_appointment(item_id):
 
         result = items.update_one(
             {'_id': ObjectId(item_id)},
-            {'$unset': {'NextAppointment': ""}, '$set': {'LastUpdated': datetime.datetime.now()}}
+            {'$unset': {'NextAppointment': ""}, '$set': {'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))}}
         )
 
         client.close()

Web/modules/database/termine.py

@@ -23,6 +23,7 @@ from Web.modules.database.settings import MongoClient
 from bson.objectid import ObjectId
 import datetime 
 import ast
+from zoneinfo import ZoneInfo
 
 
 def _get_tenant_db(client):
@@ -99,8 +100,8 @@ def add(date_start: str, date_end: str, time_span: list, slots: int, slot_lenght
             'calendar_enabled': bool(calendar_enabled),
             'clients_per_slot': clients_p_slot,
             'slots_booked': [],  # -> [(start_time, (names),(custom1, custom2,...)), ...]the list gets there indexes as the slot 1-defined so is can be counted without an extra variable
-            'Created': datetime.datetime.now(),
-            'LastUpdated': datetime.datetime.now()
+            'Created': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
         result = items.insert_one(item)
         return result.inserted_id
@@ -138,7 +139,7 @@ def update(id, slots_used: list):
 
         update_data = {
             'slots_booked': dp.encrypt_text(str(slots_used)),
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         result = items.update_one(
@@ -200,7 +201,7 @@ def remove_slot(id, date_start_time, name):
             {
                 '$set': {
                     'slots_booked': dp.encrypt_text(str(updated_slots)),
-                    'LastUpdated': datetime.datetime.now()
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 }
             }
         )

Web/modules/database/user.py

@@ -740,6 +740,87 @@ def get_user_by_student_ident(student_ident):
 
     return None
 
+
+def get_user_by_student_name(student_name):
+    """Return user dict by student name by decrypting all cards and matching."""
+    if not student_name:
+        return None
+
+    # Normalisiere den Suchbegriff, den wir finden wollen
+    normalized_target = str(student_name).strip()
+    if not normalized_target:
+        return None
+
+    client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+    try:
+        db = _get_tenant_db(client)
+        all_student_cards = db['student_cards'].find()
+
+        for user_doc in all_student_cards:
+            encrypted_student_name = user_doc.get('SchülerName')
+
+            if encrypted_student_name:
+                try:
+                    decrypted_ident = dp.decrypt_text(encrypted_student_name)
+
+                    if decrypted_ident and str(decrypted_ident).strip() == normalized_target:
+                        return user_doc
+
+                except Exception as e:
+                    logger.error(f"Entschlüsselungsfehler bei ID {user_doc.get('_id')}: {e}")
+                    continue
+
+    except Exception as exc:
+        logger.error(f"Datenbankfehler in get_user_by_student_name: {exc}")
+    finally:
+        client.close()
+
+    return None
+
+def student_is_blocked(student_id):
+    """
+    Überprüft, ob ein Schüler (Nutzer) im System gesperrt ist (z. B. aufgrund von überfälligen Ausleihen).
+    Akzeptiert entweder den Benutzernamen oder die Schülerausweis-ID.
+
+    Rückgabewert:
+        True, wenn der Nutzer gesperrt ist.
+        False, wenn der Nutzer nicht gesperrt ist oder nicht gefunden wurde.
+    """
+    if not student_id:
+        return False
+
+    normalized_card_id = normalize_student_card_id(student_id)
+
+    client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+    try:
+        db = _get_tenant_db(client)
+        users = db['users']
+
+        # Suche nach dem Benutzer anhand des Benutzernamens (groß/klein) oder der StudentCardId
+        query = {
+            '$or': [
+                {'Username': student_id},
+                {'username': student_id},
+                {'StudentCardId': normalized_card_id}
+            ]
+        }
+
+        user_doc = users.find_one(query)
+
+        if user_doc:
+            # Lese das Feld 'is_blocked' aus, standardmäßig False, falls es nicht existiert
+            return bool(user_doc.get('is_blocked', False))
+
+        # Wenn kein Nutzer gefunden wurde, gehen wir sicherheitshalber davon aus, dass keine Sperre vorliegt
+        return False
+
+    except Exception as e:
+        logger.error(f"Datenbankfehler in student_is_blocked: {e}")
+        # Im Fehlerfall False zurückgeben, um Systemblockaden durch Datenbankfehler zu vermeiden
+        return False
+    finally:
+        client.close()
+
 def make_admin(username):
     """Grant administrator privileges to a user."""
     client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)

Web/modules/emailservice/email.py

@@ -17,7 +17,7 @@ def _build_smtp_client():
         smtp.starttls()
         smtp.ehlo()
     if cfg.EMAIL_USERNAME:
-        smtp.login(cfg.EMAIL_USERNAME, cfg.EMAIL_PASSWORD or "")
+        smtp.login("no-reply@invario-software.de", "#,EATwIn,68" or "")
     return smtp
 
 
@@ -68,14 +68,20 @@ def send(email: list | str, subject: str, note: str, sender: str) -> bool:
 
             msg = MIMEMultipart("alternative")
             msg["Subject"] = str(subject)
-            msg["From"] = f"{sender} <{cfg.EMAIL_USERNAME}>"
+            msg["From"] = f"{sender} <no-reply@invario-software.de>"
             msg["To"] = str(recipient)
 
             msg.attach(MIMEText(text_content, "plain"))
             msg.attach(MIMEText(html_content, "html"))
 
+            #smtp.sendmail(
+            #    from_addr=cfg.EMAIL_USERNAME,
+            #    to_addrs=[recipient],
+            #    msg=msg.as_string()
+            #)
+
             smtp.sendmail(
-                from_addr=cfg.EMAIL_USERNAME,
+                from_addr="no-reply@invario-software.de",
                 to_addrs=[recipient],
                 msg=msg.as_string()
             )

Web/push_notifications.py

@@ -10,6 +10,7 @@ from bson import ObjectId
 import requests
 import hashlib
 import logging
+from zoneinfo import ZoneInfo
 
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
@@ -153,7 +154,7 @@ def save_push_subscription(username, subscription_obj):
             subs_col.update_one(
                 {'_id': existing['_id']},
                 {'$set': {
-                    'LastUsed': datetime.datetime.now(),
+                    'LastUsed': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
                     'IsActive': True
                 }}
             )
@@ -172,8 +173,8 @@ def save_push_subscription(username, subscription_obj):
             'Keys': encrypt_text(keys_str),
             'SubscriptionHash': sub_hash,
             'IsActive': True,
-            'CreatedAt': datetime.datetime.now(),
-            'LastUsed': datetime.datetime.now(),
+            'CreatedAt': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+            'LastUsed': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
             'UserAgent': subscription_obj.get('userAgent', ''),
         }
 
@@ -399,7 +400,7 @@ def cleanup_inactive_subscriptions():
         db = client[cfg.MONGODB_DB]
         subs_col = get_push_subscriptions_collection(db)
         
-        cutoff_date = datetime.datetime.now() - datetime.timedelta(days=30)
+        cutoff_date = datetime.datetime.now(ZoneInfo("Europe/Berlin")) - datetime.timedelta(days=30)
         
         result = subs_col.delete_many({
             'IsActive': False,

Web/templates/mahnungen_admin.html

@@ -129,97 +129,184 @@
   }
 </style>
 
-<div class="mahnungen-shell">
-  <div class="mahnungen-head">
-    <h1>Mahnungsübersicht</h1>
-    <div class="head-actions">
-      <a class="btn btn-outline-secondary" href="{{ url_for('library_loans_admin') }}">Zur Ausleihenverwaltung</a>
-      <a class="btn btn-secondary" href="{{ url_for('library_view') }}">Bibliothek öffnen</a>
+<div class="container-fluid py-4">
+    <div class="row mb-4">
+        <div class="col-12">
+            <div class="card shadow-sm">
+                <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
+                    <h5 class="mb-0"><i class="bi bi-exclamation-triangle-fill me-2"></i>Mahnungs- und Ausleihverwaltung</h5>
+                    <span class="badge bg-light text-dark">Übersicht überfälliger Medien</span>
+                </div>
+                <div class="card-body">
+                    {% if overdue_items and overdue_items|length > 0 %}
+                    <div class="table-responsive">
+                        <table class="table table-hover align-middle">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>Schüler / Ausweis</th>
+                                    <th>Klasse</th>
+                                    <th>Medium</th>
+                                    <th>Fälligkeitsdatum</th>
+                                    <th>Überfällig seit</th>
+                                    <th>Mahnstufe</th>
+                                    <th class="text-end">Aktionen</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for item in overdue_items %}
+                                <tr>
+                                    <td>
+                                        <strong>{{ item.schueler_name }}</strong><br>
+                                        <small class="text-muted">{{ item.ausweis_id }}</small>
+                                    </td>
+                                    <td>{{ item.klasse }}</td>
+                                    <td>
+                                        {{ item.item_name }}<br>
+                                        <small class="text-muted">Code: {{ item.item_code or '—' }}</small>
+                                    </td>
+                                    <td>{{ item.due_date }}</td>
+                                    <td>
+                                        <span class="badge bg-danger">{{ item.days_overdue }} Tage</span>
+                                    </td>
+                                    <td>
+                                        {% if item.mahnstufe == 2 %}
+                                            <span class="badge bg-dark text-danger">Stufe 2 (Gesperrt)</span>
+                                        {% elif item.mahnstufe == 1 %}
+                                            <span class="badge bg-warning text-dark">Stufe 1</span>
+                                        {% else %}
+                                            <span class="badge bg-secondary">Stufe 0</span>
+                                        {% endif %}
+                                    </td>
+                                    <td class="text-end">
+                                        <div class="btn-group" role="group">
+                                            {% if mail_service_enabled %}
+                                            <button type="button" class="btn btn-sm btn-outline-primary"
+                                                    onclick="openEmailModal('{{ item.id }}', '{{ item.schueler_name }}', '{{ item.email }}')">
+                                                <i class="bi bi-envelope"></i> E-Mail
+                                            </button>
+                                            {% endif %}
+                                            <button type="button" class="btn btn-sm btn-outline-warning text-dark"
+                                                    onclick="resetMahnung('{{ item.id }}', '{{ item.schueler_name }}')">
+                                                <i class="bi bi-arrow-counterclockwise"></i> Zurücksetzen
+                                            </button>
+                                        </div>
+                                    </td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                    {% else %}
+                    <div class="text-center py-5">
+                        <i class="bi bi-check-circle-fill text-success fs-1"></i>
+                        <p class="text-muted mt-2">Aktuell gibt es keine überfälligen Mahnungen.</p>
+                    </div>
+                    {% endif %}
+                </div>
+            </div>
+        </div>
     </div>
-  </div>
+</div>
 
-  <div class="mahnungen-card">
-    {% if overdue_list %}
-      <div class="search-box-wrapper">
-        <input type="text" id="searchInput" class="search-box" placeholder="🔍 Suche nach Nutzer, Klasse oder Gegenstand..." onkeyup="filterTable()">
-      </div>
-
-      <table class="mahnungen-table" id="mahnungTable">
-        <thead>
-          <tr>
-            <th>Nutzer</th>
-            <th>Klasse</th>
-            <th>Gegenstand</th>
-            <th>Fällig am</th>
-            <th>Tage drüber</th>
-            <th>Mahnstufe</th>
-            <th>Konto-Status</th>
-          </tr>
-        </thead>
-        <tbody>
-          {% for item in overdue_list %}
-          <tr>
-            <td><strong>{{ item.user or '—' }}</strong></td>
-            <td>{{ item.klasse or '—' }}</td>
-            <td>{{ item.item_name or '—' }}</td>
-            <td><span class="mono">{{ item.due_date or '—' }}</span></td>
-            <td class="text-danger">{{ item.days_overdue }} Tage</td>
-            <td>
-              {% if item.mahnstufe == 2 %}
-                <span class="badge-pill badge-open">Stufe 2 (Gesperrt)</span>
-              {% elif item.mahnstufe == 1 %}
-                <span class="badge-pill badge-warning">Stufe 1 (Gewarnt)</span>
-              {% else %}
-                <span class="badge-pill badge-info">Stufe 0 (Neu)</span>
-              {% endif %}
-            </td>
-            <td>
-              {% if item.is_blocked %}
-                <span class="badge-pill badge-open">Gesperrt</span>
-              {% else %}
-                <span class="badge-pill badge-paid">Aktiv</span>
-              {% endif %}
-            </td>
-          </tr>
-          {% endfor %}
-        </tbody>
-      </table>
-    {% else %}
-      <div class="empty-state">
-        <strong>Hervorragend!</strong> Aktuell gibt es keine überfälligen Ausleihen im System.
-      </div>
-    {% endif %}
-  </div>
+<!-- E-Mail Modal -->
+<div class="modal fade" id="emailModal" tabindex="-1" aria-labelledby="emailModalLabel" aria-hidden="true">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title" id="emailModalLabel">Mahnungs-E-Mail senden</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Schließen"></button>
+            </div>
+            <div class="modal-body">
+                <form id="emailForm">
+                    <input type="hidden" id="modalLoanId">
+                    <div class="mb-3">
+                        <label for="modalStudentName" class="form-label">Empfänger</label>
+                        <input type="text" class="form-control" id="modalStudentName" readonly>
+                    </div>
+                    <div class="mb-3">
+                        <label for="modalEmail" class="form-label">E-Mail-Adresse</label>
+                        <input type="email" class="form-control" id="modalEmail" placeholder="E-Mail-Adresse eingeben...">
+                    </div>
+                    <div class="mb-3">
+                        <label for="modalMessage" class="form-label">Nachricht</label>
+                        <textarea class="form-control" id="modalMessage" rows="4" placeholder="Optionaler Text..."></textarea>
+                    </div>
+                </form>
+            </div>
+            <div class="modal-footer">
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
+                <button type="button" class="btn btn-primary" onclick="submitEmailMahnung()">E-Mail senden</button>
+            </div>
+        </div>
+    </div>
 </div>
 
 <script>
-  function filterTable() {
-    const input = document.getElementById("searchInput");
-    const filter = input.value.toLowerCase();
-    const table = document.getElementById("mahnungTable");
-    const tr = table.getElementsByTagName("tbody")[0].getElementsByTagName("tr");
+function openEmailModal(loanId, studentName, studentEmail) {
+    document.getElementById('modalLoanId').value = loanId;
+    document.getElementById('modalStudentName').value = studentName;
+    document.getElementById('modalEmail').value = studentEmail || '';
+    document.getElementById('modalMessage').value = '';
 
-    for (let i = 0; i < tr.length; i++) {
-      const tdUser = tr[i].getElementsByTagName("td")[0];
-      const tdClass = tr[i].getElementsByTagName("td")[1];
-      const tdItem = tr[i].getElementsByTagName("td")[2];
+    var myModal = new bootstrap.Modal(document.getElementById('emailModal'));
+    myModal.show();
+}
 
-      if (tdUser || tdClass || tdItem) {
-        const textUser = tdUser.textContent || tdUser.innerText;
-        const textClass = tdClass.textContent || tdClass.innerText;
-        const textItem = tdItem.textContent || tdItem.innerText;
+function submitEmailMahnung() {
+    const loanId = document.getElementById('modalLoanId').value;
+    const email = document.getElementById('modalEmail').value;
+    const message = document.getElementById('modalMessage').value;
 
-        if (
-          textUser.toLowerCase().indexOf(filter) > -1 ||
-          textClass.toLowerCase().indexOf(filter) > -1 ||
-          textItem.toLowerCase().indexOf(filter) > -1
-        ) {
-          tr[i].style.display = "";
-        } else {
-          tr[i].style.display = "none";
-        }
-      }
+    if (!email) {
+        alert('Bitte geben Sie eine gültige E-Mail-Adresse ein.');
+        return;
     }
-  }
+
+    fetch('/mahnungen_send_email', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ loan_id: loanId, email: email, message: message })
+    })
+    .then(response => response.json())
+    .then(data => {
+        if (data.success) {
+            alert('E-Mail erfolgreich gesendet!');
+            var modalEl = document.getElementById('emailModal');
+            var modal = bootstrap.Modal.getInstance(modalEl);
+            modal.hide();
+        } else {
+            alert('Fehler: ' + data.message);
+        }
+    })
+    .catch(error => {
+        alert('Fehler beim Senden der Anfrage.');
+        console.error(error);
+    });
+}
+
+function resetMahnung(loanId, studentName) {
+    if (!confirm('Möchten Sie die Mahnung für "' + studentName + '" wirklich zurücksetzen?\n\nDadurch wird die Mahnstufe auf 0 gesetzt, die Frist um 14 Tage verlängert und der Schülerausweis entsperrt.')) {
+        return;
+    }
+
+    fetch('/mahnungen_reset', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ loan_id: loanId })
+    })
+    .then(response => response.json())
+    .then(data => {
+        if (data.success) {
+            alert(data.message);
+            location.reload(); // Seite neu laden, um die aktualisierte Ansicht zu sehen
+        } else {
+            alert('Fehler: ' + data.message);
+        }
+    })
+    .catch(error => {
+        alert('Fehler beim Senden der Anfrage.');
+        console.error(error);
+    });
+}
 </script>
 {% endblock %}

Web/templates/user_del.html

@@ -53,8 +53,11 @@
                         <option value="desc">Absteigend</option>
                     </select>
                 </div>
-                <div class="col-md-2">
-                    <button class="btn btn-secondary w-100" onclick="resetFilters()">Filter zurücksetzen</button>
+                <div class="col-md-3">
+                    <div class="d-flex gap-2">
+                        <button class="btn btn-secondary flex-grow-1" onclick="resetFilters()">Zurücksetzen</button>
+                        <button class="btn btn-success flex-grow-1" onclick="exportFilteredUsers()">Exportieren</button>
+                    </div>
                 </div>
             </div>
             <div class="mt-2 text-muted small" id="filter-count"></div>
@@ -87,14 +90,14 @@
                                     Löschen
                                 </button>
                             </form>
-                            <button type="button" class="btn btn-primary btn-sm" 
+                            <button type="button" class="btn btn-primary btn-sm"
                                     data-username="{{ user.username }}"
                                     data-firstname="{{ user.name if user.name else '' }}"
                                     data-lastname="{{ user.last_name if user.last_name else '' }}"
                                     onclick="openEditUserModal(this)">
                                 Bearbeiten
                             </button>
-                            <button type="button" class="btn btn-warning btn-sm" 
+                            <button type="button" class="btn btn-warning btn-sm"
                                     onclick="openResetPasswordModal('{{ user.username }}')">
                                 Passwort zurücksetzen
                             </button>
@@ -313,6 +316,54 @@
         applyFilters();
     }
 
+    function exportFilteredUsers() {
+        var table = document.getElementById('user-table');
+        var tbody = table.querySelector('tbody');
+        var rows = Array.from(tbody.querySelectorAll('tr'));
+
+        var visibleUsernames = [];
+
+        // Sammle alle Benutzernamen, die durch den Filter aktuell NICHT versteckt sind
+        rows.forEach(function(row) {
+            if (row.style.display !== 'none') {
+                var cells = row.querySelectorAll('td');
+                if (cells.length > 0) {
+                    visibleUsernames.push(cells[0].textContent.trim());
+                }
+            }
+        });
+
+        if (visibleUsernames.length === 0) {
+            alert('Keine Benutzer zum Exportieren vorhanden.');
+            return;
+        }
+
+        // Dynamisches Formular erstellen
+        var form = document.createElement('form');
+        form.method = 'POST';
+        form.action = "{{ url_for('export_users_csv') }}";
+
+        // 1. CSRF-Token hinzufügen
+        var csrfInput = document.createElement('input');
+        csrfInput.type = 'hidden';
+        csrfInput.name = 'csrf_token';
+        csrfInput.value = "{{ csrf_token() }}";
+        form.appendChild(csrfInput);
+
+        // 2. Gefilterte Benutzernamen hinzufügen
+        var input = document.createElement('input');
+        input.type = 'hidden';
+        input.name = 'usernames';
+        input.value = JSON.stringify(visibleUsernames);
+        form.appendChild(input);
+
+        document.body.appendChild(form);
+        form.submit();
+
+        // Aufräumen
+        document.body.removeChild(form);
+    }
+
     document.addEventListener('DOMContentLoaded', function() {
         applyFilters();
         document.getElementById('filter-search').addEventListener('input', applyFilters);
@@ -332,12 +383,12 @@
         var username = button.getAttribute('data-username');
         var name = button.getAttribute('data-firstname');
         var lastName = button.getAttribute('data-lastname');
-        
+
         document.getElementById('edit-username').value = username;
         document.getElementById('edit-username-display').value = username;
         document.getElementById('edit-name').value = name;
         document.getElementById('edit-last-name').value = lastName;
-        
+
         var modal = new bootstrap.Modal(document.getElementById('editUserModal'));
         modal.show();
     }
@@ -345,8 +396,7 @@
     function openResetPasswordModal(username) {
         document.getElementById('reset-username').value = username;
         document.getElementById('username-display').value = username;
-        
-        // Open modal using Bootstrap
+
         var modal = new bootstrap.Modal(document.getElementById('resetPasswordModal'));
         modal.show();
     }

Web/tenant.py

@@ -17,6 +17,7 @@ import re
 import ipaddress
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
+from zoneinfo import ZoneInfo
 
 logger = logging.getLogger(__name__)
 
@@ -325,7 +326,7 @@ def get_tenant_trial_status(tenant_id=None, now=None):
     "expires_after_days", "ttl_days", or "days".
     """
     trial_config = get_tenant_trial_config(tenant_id)
-    now = now or datetime.datetime.now()
+    now = now or datetime.datetime.now(ZoneInfo("Europe/Berlin"))
 
     enabled = bool(trial_config.get('enabled') or trial_config.get('active'))
     if not enabled:
@@ -447,7 +448,7 @@ def delete_tenant(tenant_id, *, drop_database=True, remove_from_config=True):
 
 def purge_expired_trial_tenants(now=None):
     """Delete expired trial tenants that opted into auto-delete."""
-    now = now or datetime.datetime.now()
+    now = now or datetime.datetime.now(ZoneInfo("Europe/Berlin"))
     purged_tenants = []
 
     for tenant_id in list(TENANT_REGISTRY.keys()):