renamem orders

orders-events/app/utils.py

@@ -0,0 +1,39 @@
+import calendar
+from datetime import date, timedelta
+
+
+def get_billing_period(
+    billing_day: int,
+    date_: date,
+) -> tuple[date, date]:
+    # Determine the anchor month and year
+    if date_.day >= billing_day:
+        anchor_month = date_.month
+        anchor_year = date_.year
+    else:
+        # Move to previous month
+        if date_.month == 1:
+            anchor_month = 12
+            anchor_year = date_.year - 1
+        else:
+            anchor_month = date_.month - 1
+            anchor_year = date_.year
+
+    # Calculate start date
+    _, last_day = calendar.monthrange(anchor_year, anchor_month)
+    start_date = date(anchor_year, anchor_month, min(billing_day, last_day))
+
+    # Calculate next month and year
+    if anchor_month == 12:
+        next_month = 1
+        next_year = anchor_year + 1
+    else:
+        next_month = anchor_month + 1
+        next_year = anchor_year
+
+    # Calculate end date
+    _, next_last_day = calendar.monthrange(next_year, next_month)
+    end_day = min(billing_day, next_last_day)
+    end_date = date(next_year, next_month, end_day) - timedelta(days=1)
+
+    return start_date, end_date