Convert prices to GBP and show

Closes: #120

agenda/fx.py

@@ -44,11 +44,11 @@ async def get_gbpusd(config: flask.config.Config) -> Decimal:
     return typing.cast(Decimal, 1 / data["quotes"]["USDGBP"])
 
 
-def get_exchange_rates(config) -> dict[str, Decimal]:
+def get_rates(config: flask.config.Config) -> dict[str, Decimal]:
     """Get current values of exchange rates for a list of currencies against GBP."""
-    currencies = config.CURRENCIES
-    access_key = config.EXCHANGERATE_ACCESS_KEY
-    data_dir = config.DATA_DIR
+    currencies = config["CURRENCIES"]
+    access_key = config["EXCHANGERATE_ACCESS_KEY"]
+    data_dir = config["DATA_DIR"]
 
     now = datetime.now()
     now_str = now.strftime("%Y-%m-%d_%H:%M")
@@ -65,7 +65,7 @@ def get_exchange_rates(config) -> dict[str, Decimal]:
         recent = datetime.strptime(recent_filename[:16], "%Y-%m-%d_%H:%M")
         delta = now - recent
 
-        if delta < timedelta(hours=6):
+        if delta < timedelta(hours=12):
             full_path = os.path.join(fx_dir, recent_filename)
             with open(full_path) as file:
                 data = json.load(file, parse_float=Decimal)

templates/macros.html

@@ -32,6 +32,9 @@
   <div class="grid-item text-end">
     {% if item.price and item.currency %}
       <span class="badge bg-info text-nowrap">{{ "{:,d}".format(item.price | int) }} {{ item.currency }}</span>
+      {% if item.currency != "GBP" %}
+        <span class="badge bg-info text-nowrap">{{ "{:,.2f}".format(item.price / fx_rate[item.currency]) }} GBP</span>
+      {% endif %}
     {% elif item.free %}
       <span class="badge bg-success text-nowrap">free to attend</span>
     {% endif %}
@@ -80,6 +83,9 @@
   <div class="grid-item text-end">
     {% if g.user.is_authenticated and item.price and item.currency %}
       <span class="badge bg-info text-nowrap">{{ "{:,f}".format(item.price) }} {{ item.currency }}</span>
+      {% if item.currency != "GBP" %}
+        <span class="badge bg-info text-nowrap">{{ "{:,.2f}".format(item.price / fx_rate[item.currency]) }} GBP</span>
+      {% endif %}
     {% endif %}
   </div>
 {% endmacro %}
@@ -118,6 +124,9 @@
   <div class="grid-item text-end">
     {% if g.user.is_authenticated and item.price and item.currency %}
       <span class="badge bg-info text-nowrap">{{ "{:,f}".format(item.price) }} {{ item.currency }}</span>
+      {% if item.currency != "GBP" %}
+        <span class="badge bg-info text-nowrap">{{ "{:,.2f}".format(item.price / fx_rate[item.currency]) }} GBP</span>
+      {% endif %}
     {% endif %}
   </div>
 {% endmacro %}
@@ -161,6 +170,9 @@
   <div class="grid-item text-end">
     {% if g.user.is_authenticated and item.price and item.currency %}
       <span class="badge bg-info text-nowrap">{{ "{:,f}".format(item.price) }} {{ item.currency }}</span>
+      {% if item.currency != "GBP" %}
+        <span class="badge bg-info text-nowrap">{{ "{:,.2f}".format(item.price / fx_rate[item.currency]) }} GBP</span>
+      {% endif %}
     {% endif %}
   </div>
 {% endmacro %}

web_view.py

@@ -2,6 +2,7 @@
 
 """Web page to show upcoming events."""
 
+import decimal
 import inspect
 import operator
 import os.path
@@ -17,6 +18,7 @@ import yaml
 
 import agenda.data
 import agenda.error_mail
+import agenda.fx
 import agenda.holidays
 import agenda.thespacedevs
 import agenda.trip
@@ -125,7 +127,12 @@ def travel_list() -> str:
         if all("distance" in leg for leg in train["legs"]):
             train["distance"] = sum(leg["distance"] for leg in train["legs"])
 
-    return flask.render_template("travel.html", flights=flights, trains=trains)
+    return flask.render_template(
+        "travel.html",
+        flights=flights,
+        trains=trains,
+        fx_rate=agenda.fx.get_rates(app.config),
+    )
 
 
 def as_date(d: date | datetime) -> date:
@@ -151,6 +158,10 @@ def conference_list() -> str:
         conf["start_date"] = as_date(conf["start"])
         conf["end_date"] = as_date(conf["end"])
 
+        price = conf.get("price")
+        if price:
+            conf["price"] = decimal.Decimal(price)
+
         key = (conf["start"], conf["name"])
         if this_trip := conference_trip_lookup.get(key):
             conf["linked_trip"] = this_trip
@@ -172,6 +183,7 @@ def conference_list() -> str:
         future=future,
         today=today,
         get_country=agenda.get_country,
+        fx_rate=agenda.fx.get_rates(app.config),
     )
 
 
@@ -218,6 +230,7 @@ def accommodation_list() -> str:
         total_nights_2024=total_nights_2024,
         nights_abroad_2024=nights_abroad_2024,
         get_country=agenda.get_country,
+        fx_rate=agenda.fx.get_rates(app.config),
     )
 
 
@@ -263,6 +276,7 @@ def trip_list() -> str:
         today=today,
         get_country=agenda.get_country,
         format_list_with_ampersand=format_list_with_ampersand,
+        fx_rate=agenda.fx.get_rates(app.config),
     )