Add holiday page

Page showing holidays in countries of interest, just in English for now.

web_view.py

@@ -7,7 +7,7 @@ import operator
 import os.path
 import sys
 import traceback
-from datetime import date, datetime
+from datetime import date, datetime, timedelta
 
 import flask
 import werkzeug
@@ -16,6 +16,7 @@ import yaml
 
 import agenda.data
 import agenda.error_mail
+import agenda.holidays
 import agenda.thespacedevs
 import agenda.trip
 from agenda import format_list_with_ampersand, travel
@@ -246,5 +247,20 @@ def trip_page(start: str) -> str:
     )
 
 
+@app.route("/holidays")
+def holiday_list() -> str:
+    """List of holidays."""
+    today = date.today()
+    data_dir = app.config["DATA_DIR"]
+    next_year = today + timedelta(days=1 * 365)
+    items = agenda.holidays.get_all(today - timedelta(days=2), next_year, data_dir)
+
+    items.sort(key=lambda item: (item.date, item.country))
+
+    return flask.render_template(
+        "holiday_list.html", items=items, get_country=agenda.get_country
+    )
+
+
 if __name__ == "__main__":
     app.run(host="0.0.0.0")