Add accommodation page

Closes: #88

web_view.py

@@ -111,5 +111,30 @@ def conference_list() -> str:
     )
 
 
+@app.route("/accommodation")
+def accommodation_list() -> str:
+    """Page showing a list of past, present and future accommodation."""
+    data_dir = app.config["PERSONAL_DATA"]
+    items = agenda.travel.parse_yaml("accommodation", data_dir)
+
+    stays_in_2024 = [item for item in items if item["from"].year == 2024]
+    total_nights_2024 = sum(
+        (stay["to"].date() - stay["from"].date()).days for stay in stays_in_2024
+    )
+
+    nights_abroad_2024 = sum(
+        (stay["to"].date() - stay["from"].date()).days
+        for stay in stays_in_2024
+        if stay["country"] != "gb"
+    )
+
+    return flask.render_template(
+        "accommodation.html",
+        items=items,
+        total_nights_2024=total_nights_2024,
+        nights_abroad_2024=nights_abroad_2024,
+    )
+
+
 if __name__ == "__main__":
     app.run(host="0.0.0.0")