Split economist code into own file

agenda/economist.py

@@ -0,0 +1,32 @@
+"""Next publication date of the Economist."""
+
+from datetime import date, timedelta
+
+
+def next_pub_date(input_date: date) -> date:
+    """Next date that the Economist is published."""
+    # Define the publication day (Thursday) and the day of the week of the input date
+    publication_day = 3  # Thursday (0 - Monday, 1 - Tuesday, ..., 6 - Sunday)
+    current_day_of_week = input_date.weekday()
+    current_week_number = input_date.isocalendar().week
+
+    # Define the list of weeks when The Economist is not published
+    non_publication_weeks = [26, 56]
+
+    # Check if the input date is a publication day (Thursday)
+    if (
+        current_day_of_week == publication_day
+        and current_week_number not in non_publication_weeks
+    ):
+        return input_date
+
+    # Calculate the date for the next Thursday after the input date
+    days_until_next_thursday = (publication_day - current_day_of_week + 7) % 7
+    next_thursday_date = input_date + timedelta(days=days_until_next_thursday)
+
+    # Check if the next Thursday falls in a non-publication week
+    while next_thursday_date.isocalendar().week in non_publication_weeks:
+        # If it does, add 7 days to find the next Thursday
+        next_thursday_date += timedelta(days=7)
+
+    return next_thursday_date