Travel stats to show number of conference stats

Closes: #167

agenda/trip.py

@@ -388,6 +388,11 @@ def calculate_yearly_stats(trips: list[Trip]) -> dict[int, StrDict]:
         dist = trip.total_distance()
         yearly_stats[year].setdefault("count", 0)
         yearly_stats[year]["count"] += 1
+
+        for c in trip.conferences:
+            yearly_stats[c["start"].year].setdefault("conferences", 0)
+            yearly_stats[c["start"].year]["conferences"] += 1
+
         if dist:
             yearly_stats[year]["total_distance"] = (
                 yearly_stats[year].get("total_distance", 0) + trip.total_distance()

templates/trip/stats.html

@@ -10,6 +10,7 @@
 <div class="container-fluid">
   <h1>Trip statistics</h1>
   <div>Trips: {{ count }}</div>
+  <div>Conferences: {{ conferences }}</div>
   <div>Total distance: {{ format_distance(total_distance) }}</div>
 
   {% for transport_type, distance in distances_by_transport_type %}
@@ -23,6 +24,7 @@
     {% set countries = year_stats.countries | sort(attribute="name") %}
     <h4>{{ year }}</h4>
     <div>Trips in {{ year }}: {{ year_stats.count }}</div>
+    <div>Conferences in {{ year }}: {{ year_stats.conferences }}</div>
     <div>{{ countries | count }} countries visited in {{ year }}:
       {% for c in countries %}
       <span class="text-nowrap">{{ c.flag }} {{ c.name }}</span>

web_view.py

@@ -590,6 +590,7 @@ def trip_stats() -> str:
     today = date.today()
 
     past = [item for item in trip_list if (item.end or item.start) < today]
+    conferences = sum(len(item.conferences) for item in past)
 
     yearly_stats = agenda.trip.calculate_yearly_stats(past)
 
@@ -599,6 +600,7 @@ def trip_stats() -> str:
         total_distance=calc_total_distance(past),
         distances_by_transport_type=sum_distances_by_transport_type(past),
         yearly_stats=yearly_stats,
+        conferences=conferences,
     )