Show holidays in visited countries on trip page

Closes: #112

templates/trip_page.html

@@ -72,6 +72,25 @@
     {% for item in trip.travel %} {{ row[item.type](item) }} {% endfor %}
   </div>
 
+  <div class="mt-3">
+  <h4>Holidays</h4>
+
+  <table class="table table-hover w-auto">
+  {% for item in holidays %}
+    {% set country = get_country(item.country) %}
+    <tr>
+      {% if loop.first or item.date != loop.previtem.date %}
+        <td class="text-end">{{ display_date(item.date) }}</td>
+      {% else %}
+        <td></td>
+      {% endif %}
+      <td>{{ country.flag }} {{ country.name }}</td>
+      <td>{{ item.display_name }}</td>
+    </tr>
+  {% endfor %}
+  </table>
+  </div>
+
   <p>
     {% if prev_trip %}
       previous: {{ trip_link(prev_trip) }} ({{ (trip.start - prev_trip.end).days }} days)

web_view.py

@@ -253,6 +253,19 @@ def trip_page(start: str) -> str:
         if "geojson_filename" in route:
             route["geojson"] = agenda.trip.read_geojson(route.pop("geojson_filename"))
 
+    if trip.end:
+        countries = {c.alpha_2 for c in trip.countries}
+        holidays = [
+            hol
+            for hol in agenda.holidays.get_all(
+                trip.start, trip.end, app.config["DATA_DIR"]
+            )
+            if hol.country.upper() in countries
+        ]
+        holidays.sort(key=lambda item: (item.date, item.country))
+    else:
+        holidays = []
+
     return flask.render_template(
         "trip_page.html",
         trip=trip,
@@ -263,6 +276,7 @@ def trip_page(start: str) -> str:
         routes=routes,
         get_country=agenda.get_country,
         format_list_with_ampersand=format_list_with_ampersand,
+        holidays=holidays,
     )