Trip distance by means of transport: air and rail

Closes: #148

agenda/types.py

@@ -2,6 +2,7 @@
 
 import datetime
 import typing
+from collections import Counter
 from dataclasses import dataclass, field
 
 from pycountry.db import Country
@@ -141,6 +142,25 @@ class Trip:
             else None
         )
 
+    def distances_by_transport_type(self) -> list[tuple[str, float]]:
+        """Calculate the total distance travelled for each type of transport.
+
+        Any travel item with a missing or None 'distance' field is ignored.
+        """
+        transport_distances: Counter[float] = Counter()
+
+        for item in self.travel:
+            distance = item.get("distance")
+            if distance:
+                transport_type = item.get("type", "unknown")
+                transport_distances[transport_type] += distance
+
+        return list(transport_distances.items())
+
+
+# Example usage:
+# You would call the function with your travel list here to get the results.
+
 
 @dataclass
 class Holiday:

templates/trip_page.html

@@ -61,6 +61,7 @@
 
 {% set end = trip.end %}
 {% set total_distance = trip.total_distance() %}
+{% set distances_by_transport_type = trip.distances_by_transport_type() %}
 
 {% block content %}
 <div class="row">
@@ -87,6 +88,14 @@
       </div>
     {% endif %}
 
+    {% if distances_by_transport_type %}
+      {% for transport_type, distance in distances_by_transport_type %}
+        <div>{{ transport_type | title }} distance:
+          {{ "{:,.0f} km / {:,.0f} miles".format(distance, distance / 1.60934) }}
+        </div>
+      {% endfor %}
+    {% endif %}
+
 
     {% set delta = human_readable_delta(trip.start) %}
     {% if delta %}
@@ -248,23 +257,22 @@
     <div class="mt-3">
     <h4>Holidays</h4>
     {% if holidays %}
-
-    <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>
+      <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>
     {% else %}
-    <p>No public holidays during trip.</p>
+      <p>No public holidays during trip.</p>
     {% endif %}
     </div>