Adjust weekend page high pithing

Don't highlight a week number when showing weekends for different year.

Example: https://edwardbetts.com/agenda/weekends?year=2100&week=1

Closes: #198

templates/weekends.html

@@ -16,9 +16,12 @@
     </thead>
     <tbody>
 
+  {% set current_isocalendar = today.isocalendar() %}
+
   {% for weekend in items %}
   {% set week_number = weekend.date.isocalendar().week %}
-  {% if week_number == current_week_number %}
+  {% set iso_week_year = weekend.date.isocalendar().year %}
+  {% if week_number == current_week_number and iso_week_year == current_isocalendar.year %}
     {% set extra_class = " bg-warning-subtle" %}
   {% else %}
     {% set extra_class = "" %}

web_view.py

@@ -28,6 +28,7 @@ import agenda.trip
 import agenda.trip_schengen
 import agenda.utils
 from agenda import calendar, format_list_with_ampersand, travel, uk_tz
+from agenda.schengen import get_country_flag
 from agenda.types import StrDict, Trip
 
 app = flask.Flask(__name__)
@@ -40,7 +41,6 @@ agenda.error_mail.setup_error_mail(app)
 @app.template_filter("country_flag")
 def country_flag_filter(country_code: str) -> str:
     """Convert country code to emoji flag."""
-    from agenda.schengen import get_country_flag
     return get_country_flag(country_code)
 
 
@@ -247,13 +247,17 @@ async def weekends() -> str:
             week = int(week_str)
             year = int(year_str) if year_str else today.year
             if week < 1 or week > 53:
-                return flask.abort(400, description="Week number must be between 1 and 53.")
+                return flask.abort(
+                    400, description="Week number must be between 1 and 53."
+                )
             # Calculate the date of the first day of the given week
             jan_1 = date(year, 1, 1)
             week_1_start = jan_1 - timedelta(days=jan_1.weekday())
             start = week_1_start + timedelta(weeks=week - 1)
         except ValueError:
-            return flask.abort(400, description="Invalid week or year format. Use integers.")
+            return flask.abort(
+                400, description="Invalid week or year format. Use integers."
+            )
     else:
         start = date(today.year, 1, 1)
 
@@ -263,7 +267,10 @@ async def weekends() -> str:
     busy_events = agenda.busy.get_busy_events(start, app.config, trip_list)
     weekends = agenda.busy.weekends(start, busy_events)
     return flask.render_template(
-        "weekends.html", items=weekends, current_week_number=current_week_number
+        "weekends.html",
+        items=weekends,
+        current_week_number=current_week_number,
+        today=today,
     )
 
 
@@ -415,11 +422,11 @@ def get_trip_list(
         for trip in agenda.trip.build_trip_list(route_distances=route_distances)
         if flask.g.user.is_authenticated or not trip.private
     ]
-    
+
     # Add Schengen compliance information to each trip
     for trip in trips:
         agenda.trip_schengen.add_schengen_compliance_to_trip(trip)
-    
+
     return trips
 
 
@@ -556,7 +563,7 @@ def trip_page(start: str) -> str:
     prev_trip, trip, next_trip = get_prev_current_and_next_trip(start, trip_list)
     if not trip:
         flask.abort(404)
-    
+
     # Add Schengen compliance information
     trip = agenda.trip_schengen.add_schengen_compliance_to_trip(trip)