new fuctions

app.py

@@ -1182,6 +1182,10 @@ def file_mtime_filter(path):
         # return datetime.utcnow()
         return datetime.now(timezone.utc)
 
+@app.template_filter("todatetime")
+def to_datetime_filter(s):
+    return datetime.strptime(s, "%Y-%m-%d")
+
 
 @app.template_filter("filesizeformat")
 def filesizeformat_filter(path):
@@ -2126,20 +2130,59 @@ def crop_receipt_user():
 @login_required
 @admin_required
 def admin_panel():
-    now = datetime.now(timezone.utc)
+    month_str = request.args.get("month")
+    show_all = (month_str == "all")
+
+    if not show_all:
+        try:
+            if month_str:
+                year, month = map(int, month_str.split("-"))
+                now = datetime(year, month, 1, tzinfo=timezone.utc)
+            else:
+                now = datetime.now(timezone.utc)
+                month_str = now.strftime("%Y-%m")
+        except Exception:
+            now = datetime.now(timezone.utc)
+            month_str = now.strftime("%Y-%m")
+        start = now
+        end = (start + timedelta(days=31)).replace(day=1)
+    else:
+        now = datetime.now(timezone.utc)
+        start = end = None
 
     # Liczniki globalne
     user_count = User.query.count()
     list_count = ShoppingList.query.count()
     item_count = Item.query.count()
 
-    all_lists = ShoppingList.query.options(
+    base_query = ShoppingList.query.options(
         joinedload(ShoppingList.owner),
         joinedload(ShoppingList.items),
         joinedload(ShoppingList.receipts),
         joinedload(ShoppingList.expenses),
         joinedload(ShoppingList.categories),
-    ).all()
+    )
+
+    if not show_all and start and end:
+        base_query = base_query.filter(ShoppingList.created_at >= start, ShoppingList.created_at < end)
+
+    all_lists = base_query.all()
+    
+    # tylko listy z danych miesięcy
+    if db.engine.name == "sqlite":
+        month_col = func.strftime('%Y-%m', ShoppingList.created_at)
+    else:
+        month_col = func.to_char(ShoppingList.created_at, 'YYYY-MM')
+
+    active_months = (
+        db.session.query(month_col.label("month"))
+        .filter(ShoppingList.created_at != None)
+        .distinct()
+        .order_by("month")  # bez min()
+        .all()
+    )
+
+    month_options = [row.month for row in active_months]
 
     all_ids = [l.id for l in all_lists]
 
@@ -2213,6 +2256,7 @@ def admin_panel():
     )
 
     purchased_items_count = Item.query.filter_by(purchased=True).count()
+    
     expense_summary = get_admin_expense_summary()
     process = psutil.Process(os.getpid())
     app_mem = process.memory_info().rss // (1024 * 1024)
@@ -2248,6 +2292,10 @@ def admin_panel():
         table_count=table_count,
         record_total=record_total,
         uptime_minutes=uptime_minutes,
+        timedelta=timedelta,
+        show_all=show_all,
+        month_str=month_str,
+        month_options=month_options,
     )