Add country, city and venue.

main.py

@@ -101,7 +101,7 @@ def top_events() -> sqlalchemy.orm.query.Query:
         database.session.query(model.Event.title, func.count())
         .group_by(model.Event.title)
         .order_by(func.count().desc())
-        .having(func.count() > 5)
+        .having(func.count() > 3)
     )
     return q
 
@@ -235,6 +235,29 @@ def top_speakers_page() -> str:
     return flask.render_template("top_speakers.html", top_speakers=top_speakers())
 
 
+@app.route("/country")
+def country_list() -> str:
+    """Country list."""
+    return flask.render_template("country_list.html", items=model.Country.query)
+
+
+@app.route("/city/<int:city_id>/venue/new", methods=["GET", "POST"])
+def add_venue(city_id: int) -> str | Response:
+    """Add new venue."""
+    city = model.City.query.get(city_id)
+    if flask.request.method != "POST":
+        return flask.render_template("add_venue.html", city=city)
+
+    name = flask.request.form["name"]
+    wikidata_qid = flask.request.form["wikidata_qid"]
+    venue = model.Venue(name=name, city=city, wikidata_qid=wikidata_qid)
+    database.session.add(venue)
+    database.session.commit()
+
+    endpoint = flask.endpoint
+    return flask.redirect(flask.url_for(endpoint))
+
+
 @app.route("/wikidata")
 def link_to_wikidata() -> str:
     items = []