Show Eurostar Standard prices and total journey cost on results page

Fetches prices via the site-api.eurostar.com GraphQL gateway
(NewBookingSearch operation, discovered with Playwright). Adds
fetch_prices() to scraper/eurostar.py using requests, caches results,
annotates each trip with eurostar_price and total_price, and shows an
ES Std column plus total cost (duration + price) in the results table.
The Transfer column is hidden on small screens for mobile usability.

Closes #4

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.py

@@ -8,6 +8,7 @@ from cache import get_cached, set_cached
 import scraper.eurostar as eurostar_scraper
 import scraper.realtime_trains as rtt_scraper
 from trip_planner import combine_trips, find_unreachable_morning_eurostars
+from scraper.eurostar import fetch_prices as fetch_eurostar_prices
 
 RTT_PADDINGTON_URL = (
     "https://www.realtimetrains.co.uk/search/detailed/"
@@ -80,10 +81,12 @@ def results(slug, travel_date):
 
     rtt_cache_key = f"rtt_{travel_date}"
     es_cache_key = f"eurostar_{travel_date}_{destination}"
+    prices_cache_key = f"eurostar_prices_{travel_date}_{destination}"
 
     cached_rtt = get_cached(rtt_cache_key)
     cached_es = get_cached(es_cache_key)
-    from_cache = bool(cached_rtt and cached_es)
+    cached_prices = get_cached(prices_cache_key)
+    from_cache = bool(cached_rtt and cached_es and cached_prices)
 
     error = None
 
@@ -108,7 +111,28 @@ def results(slug, travel_date):
             msg = f"Could not fetch Eurostar times: {e}"
             error = f"{error}; {msg}" if error else msg
 
+    if cached_prices:
+        eurostar_prices = cached_prices
+    else:
+        try:
+            eurostar_prices = fetch_eurostar_prices(destination, travel_date)
+            set_cached(prices_cache_key, eurostar_prices)
+        except Exception as e:
+            eurostar_prices = {}
+            msg = f"Could not fetch Eurostar prices: {e}"
+            error = f"{error}; {msg}" if error else msg
+
     trips = combine_trips(gwr_trains, eurostar_trains, travel_date, min_connection, max_connection)
+
+    # Annotate each trip with Eurostar Standard price and total cost
+    for trip in trips:
+        es_price = eurostar_prices.get(trip['depart_st_pancras'])
+        trip['eurostar_price'] = es_price
+        if es_price is not None:
+            trip['total_price'] = trip['ticket_price'] + es_price
+        else:
+            trip['total_price'] = None
+
     unreachable_morning_services = find_unreachable_morning_eurostars(
         gwr_trains,
         eurostar_trains,
@@ -116,6 +140,9 @@ def results(slug, travel_date):
         min_connection,
         max_connection,
     )
+    for svc in unreachable_morning_services:
+        svc['eurostar_price'] = eurostar_prices.get(svc['depart_st_pancras'])
+
     result_rows = sorted(
         [{'row_type': 'trip', **trip} for trip in trips]
         + [{'row_type': 'unreachable', **service} for service in unreachable_morning_services],

scraper/eurostar.py

@@ -1,7 +1,7 @@
 """
-Scrape Eurostar timetable via httpx.
+Scrape Eurostar timetable via httpx and fetch prices via the GraphQL API.
 
-The route-specific timetable pages are Next.js SSR — all departure data is
+Timetable: route-specific pages are Next.js SSR — all departure data is
 embedded in <script id="__NEXT_DATA__"> as JSON, so no browser / JS needed.
 
 URL pattern:
@@ -12,10 +12,19 @@ Data path: props.pageProps.pageData.liveDepartures[]
   .origin.model.scheduledDepartureDateTime  → London departure
   .destination.model.scheduledArrivalDateTime → destination arrival
     (already filtered to the requested stop, not the final stop)
+
+Prices: POST https://site-api.eurostar.com/gateway (GraphQL, operationName
+NewBookingSearch).  The `journeys[].fares[]` array contains one entry per
+class of service; we extract the Eurostar Standard (classOfService.code ==
+"STANDARD") displayPrice for 1 adult, in GBP.
 """
 import json
+import random
 import re
+import string
+
 import httpx
+import requests
 
 DEFAULT_UA = (
     "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
@@ -90,3 +99,105 @@ def fetch(destination: str, travel_date: str,
         r = client.get(url, params={'date': travel_date})
     r.raise_for_status()
     return _parse(r.text, destination)
+
+
+# ---------------------------------------------------------------------------
+# Price fetching via site-api.eurostar.com GraphQL
+# ---------------------------------------------------------------------------
+
+_GATEWAY_URL = 'https://site-api.eurostar.com/gateway'
+
+# Minimal query requesting only timing + Eurostar Standard fare price.
+# Variable names and inline argument names match what the site sends so the
+# server-side query planner sees a familiar shape.
+_GQL_PRICES = (
+    "query NewBookingSearch("
+    "$origin:String!,$destination:String!,$outbound:String!,"
+    "$currency:Currency!,$adult:Int,"
+    "$filteredClassesOfService:[ClassOfServiceEnum]"
+    "){"
+    "journeySearch("
+    "outboundDate:$outbound origin:$origin destination:$destination"
+    " adults:$adult currency:$currency"
+    " productFamilies:[\"PUB\"] contractCode:\"EIL_ALL\""
+    " adults16Plus:0 children:0 youths:0 children4Only:0 children5To11:0"
+    " infants:0 adultsWheelchair:0 childrenWheelchair:0 guideDogs:0"
+    " wheelchairCompanions:0 nonWheelchairCompanions:0"
+    " isAftersales:false multipleFlexibility:true showAllSummatedFares:false"
+    " seniorsAges:[] prioritiseShortHaulODTrains:true"
+    "){"
+    "outbound{"
+    "journeys("
+    "hideIndirectTrainsWhenDisruptedAndCancelled:false"
+    " hideDepartedTrains:true"
+    " hideExternalCarrierTrains:true"
+    " hideDirectExternalCarrierTrains:true"
+    "){"
+    "timing{departureTime:departs __typename}"
+    "fares(filteredClassesOfService:$filteredClassesOfService){"
+    "classOfService{code __typename}"
+    "prices{displayPrice __typename}"
+    "seats __typename"
+    "}"
+    "__typename"
+    "}"
+    "__typename"
+    "}"
+    "__typename"
+    "}"
+    "}"
+)
+
+
+def _generate_cid() -> str:
+    chars = string.ascii_letters + string.digits
+    return 'SRCH-' + ''.join(random.choices(chars, k=22))
+
+
+def fetch_prices(destination: str, travel_date: str) -> dict[str, int | None]:
+    """
+    Return Eurostar Standard prices for every departure on travel_date.
+
+    Result: {depart_st_pancras: price_gbp_int_or_None}
+    None means the class is sold out or unavailable for that departure.
+    """
+    dest_id = DESTINATION_STATION_IDS[destination]
+    headers = {
+        'User-Agent': DEFAULT_UA,
+        'Content-Type': 'application/json',
+        'Accept': '*/*',
+        'Accept-Language': 'en-GB',
+        'Referer': 'https://www.eurostar.com/',
+        'x-platform': 'web',
+        'x-market-code': 'uk',
+        'x-source-url': 'search-app/',
+        'cid': _generate_cid(),
+    }
+    payload = {
+        'operationName': 'NewBookingSearch',
+        'variables': {
+            'origin': ORIGIN_STATION_ID,
+            'destination': dest_id,
+            'outbound': travel_date,
+            'currency': 'GBP',
+            'adult': 1,
+            'filteredClassesOfService': ['STANDARD'],
+        },
+        'query': _GQL_PRICES,
+    }
+    resp = requests.post(_GATEWAY_URL, json=payload, headers=headers, timeout=20)
+    resp.raise_for_status()
+    data = resp.json()
+    prices: dict[str, int | None] = {}
+    journeys = data['data']['journeySearch']['outbound']['journeys']
+    for journey in journeys:
+        dep = journey['timing']['departureTime']
+        price = None
+        for fare in journey['fares']:
+            if fare['classOfService']['code'] == 'STANDARD':
+                p = fare.get('prices')
+                if p and p.get('displayPrice'):
+                    price = int(p['displayPrice'])
+                break
+        prices[dep] = price
+    return prices

templates/results.html

@@ -5,6 +5,11 @@
 {% block twitter_title %}Bristol to {{ destination }} via Eurostar{% endblock %}
 {% block twitter_description %}Train options from Bristol Temple Meads to {{ destination }} on {{ travel_date_display }} via Paddington, St Pancras, and Eurostar.{% endblock %}
 {% block content %}
+<style>
+  @media (max-width: 640px) {
+    .col-transfer { display: none; }
+  }
+</style>
 
 <p style="margin-bottom:1rem">
   <a href="{{ url_for('index') }}">&larr; New search</a>
@@ -100,10 +105,10 @@
         <th style="padding:0.6rem 0.8rem;white-space:nowrap">Bristol</th>
         <th style="padding:0.6rem 0.8rem;white-space:nowrap">Paddington</th>
         <th style="padding:0.6rem 0.8rem;white-space:nowrap">GWR Fare</th>
-        <th style="padding:0.6rem 0.8rem;white-space:nowrap">Transfer</th>
+        <th class="col-transfer" style="padding:0.6rem 0.8rem;white-space:nowrap">Transfer</th>
         <th style="padding:0.6rem 0.8rem;white-space:nowrap">Depart St&nbsp;Pancras</th>
-        <th style="padding:0.6rem 0.8rem">{{ destination }}
+        <th style="padding:0.6rem 0.8rem">{{ destination }}</th>
-        </th>
+        <th style="padding:0.6rem 0.8rem;white-space:nowrap">ES Std</th>
         <th style="padding:0.6rem 0.8rem;white-space:nowrap">Total</th>
       </tr>
     </thead>
@@ -138,7 +143,7 @@
           £{{ "%.2f"|format(row.ticket_price) }}
           <br><span style="font-size:0.75rem;color:#718096">{{ row.ticket_name }}</span>
         </td>
-        <td style="padding:0.6rem 0.8rem;color:#4a5568">
+        <td class="col-transfer" style="padding:0.6rem 0.8rem;color:#4a5568">
           {{ row.connection_duration }}
         </td>
         <td style="padding:0.6rem 0.8rem;font-weight:600">
@@ -149,7 +154,14 @@
           {{ row.arrive_destination }}
           <span style="font-weight:400;color:#718096;font-size:0.85em">(CET)</span>
         </td>
-        <td style="padding:0.6rem 0.8rem;font-weight:600">
+        <td style="padding:0.6rem 0.8rem;white-space:nowrap">
+          {% if row.eurostar_price is not none %}
+            £{{ row.eurostar_price }}
+          {% else %}
+            <span style="color:#718096">&ndash;</span>
+          {% endif %}
+        </td>
+        <td style="padding:0.6rem 0.8rem;font-weight:600;white-space:nowrap">
           {% if row.total_minutes <= best_mins + 5 and trips | length > 1 %}
             <span style="color:#276749" title="Fastest option">{{ row.total_duration }} ⚡</span>
           {% elif row.total_minutes >= worst_mins - 5 and trips | length > 1 %}
@@ -157,11 +169,14 @@
           {% else %}
             <span style="color:#00539f">{{ row.total_duration }}</span>
           {% endif %}
+          {% if row.total_price is not none %}
+            <br><span style="font-size:0.8rem;font-weight:700;color:#276749">£{{ "%.2f"|format(row.total_price) }}</span>
+          {% endif %}
         </td>
         {% else %}
         <td style="padding:0.6rem 0.8rem;font-weight:600">&mdash;</td>
         <td style="padding:0.6rem 0.8rem">&mdash;</td>
-        <td style="padding:0.6rem 0.8rem">&mdash;</td>
+        <td class="col-transfer" style="padding:0.6rem 0.8rem">&mdash;</td>
         <td style="padding:0.6rem 0.8rem">Unavailable</td>
         <td style="padding:0.6rem 0.8rem;font-weight:600">
           {{ row.depart_st_pancras }}
@@ -171,8 +186,15 @@
           {{ row.arrive_destination }}
           <span style="font-weight:400;color:#a0aec0;font-size:0.85em">(CET)</span>
         </td>
+        <td style="padding:0.6rem 0.8rem;white-space:nowrap">
+          {% if row.eurostar_price is not none %}
+            <span style="color:#a0aec0">£{{ row.eurostar_price }}</span>
+          {% else %}
+            <span style="color:#a0aec0">&ndash;</span>
+          {% endif %}
+        </td>
         <td style="padding:0.6rem 0.8rem;font-weight:600">
-          <span title="No same-day Bristol connection">Unavailable from Bristol</span>
+          <span title="No same-day Bristol connection" style="color:#a0aec0">Unavailable from Bristol</span>
         </td>
         {% endif %}
       </tr>
@@ -186,7 +208,8 @@
   {% if unreachable_morning_services %}
   Morning means Eurostar departures before 12:00 from St&nbsp;Pancras.
   {% endif %}
-  Eurostar times are from the general timetable and may vary; always check
+  GWR walk-on single prices for Bristol Temple Meads&nbsp;&rarr;&nbsp;Paddington.
+  Eurostar Standard prices are for 1 adult in GBP; always check
   <a href="{{ eurostar_url }}" target="_blank" rel="noopener">eurostar.com</a> to book.
   &nbsp;&middot;&nbsp;
   <a href="{{ rtt_url }}" target="_blank" rel="noopener">Paddington arrivals on RTT</a>

tests/test_app.py

@@ -6,7 +6,7 @@ def _client():
     return app_module.app.test_client()
 
 
-def _stub_data(monkeypatch):
+def _stub_data(monkeypatch, prices=None):
     monkeypatch.setattr(app_module, 'get_cached', lambda key: None)
     monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
     monkeypatch.setattr(
@@ -33,6 +33,8 @@ def _stub_data(monkeypatch):
         'timetable_url',
         lambda destination: f'https://example.test/{destination.lower().replace(" ", "-")}',
     )
+    _prices = prices if prices is not None else {}
+    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: _prices)
 
 
 def test_index_shows_fixed_departure_and_destination_radios():
@@ -94,6 +96,7 @@ def test_results_title_and_social_meta_include_destination(monkeypatch):
 def test_results_marks_trips_within_five_minutes_of_fastest_and_slowest(monkeypatch):
     monkeypatch.setattr(app_module, 'get_cached', lambda key: None)
     monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
+    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: {})
     monkeypatch.setattr(
         app_module.rtt_scraper,
         'fetch',
@@ -165,6 +168,7 @@ def test_results_marks_trips_within_five_minutes_of_fastest_and_slowest(monkeypa
 def test_results_shows_unreachable_morning_eurostar_services(monkeypatch):
     monkeypatch.setattr(app_module, 'get_cached', lambda key: None)
     monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
+    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: {})
     monkeypatch.setattr(
         app_module.rtt_scraper,
         'fetch',
@@ -215,9 +219,23 @@ def test_results_shows_unreachable_morning_eurostar_services(monkeypatch):
     assert html.index('09:30') < html.index('10:15')
 
 
+def test_results_shows_eurostar_price_and_total(monkeypatch):
+    # 07:00 on Friday 2026-04-10 → Anytime £138.70 (weekday, 05:05–08:25 window)
+    _stub_data(monkeypatch, prices={'10:01': 59})
+    client = _client()
+
+    resp = client.get('/results/paris/2026-04-10?min_connection=60&max_connection=120')
+    html = resp.get_data(as_text=True)
+
+    assert resp.status_code == 200
+    assert '£59' in html                    # Eurostar Standard price
+    assert '£197.70' in html               # Anytime £138.70 + ES £59
+
+
 def test_results_can_show_only_unreachable_morning_services(monkeypatch):
     monkeypatch.setattr(app_module, 'get_cached', lambda key: None)
     monkeypatch.setattr(app_module, 'set_cached', lambda key, data: None)
+    monkeypatch.setattr(app_module, 'fetch_eurostar_prices', lambda dest, date: {})
     monkeypatch.setattr(
         app_module.rtt_scraper,
         'fetch',