show the date of the latest rate update on the monitor page

fixes #17

apps/monitor/calc.py

@@ -59,6 +59,7 @@ class Calc:
 
   def GetCurrentValue(self, userid, crypto, total_investment, current_value, total_tax_free):
     amount_kept = 0
+    last_updated = None
     out = {}
     out["crypto"] = crypto
 
@@ -93,6 +94,7 @@ class Calc:
       out["current_value"] = cv
       out["amount_kept"] = amount_kept
       out["rateEUR"] = rateEUR.rate
+      last_updated = rateEUR.datetime_valid
     else:
       out["current_value"] = None
       out["amount_kept"] = None
@@ -134,4 +136,4 @@ class Calc:
           out["value_tax_free"] = amount_available_to_sell * rateEUR.rate
           total_tax_free += out["value_tax_free"]
 
-    return (total_investment, current_value, total_tax_free, rateEUR.rate, rateUSD.rate, out)
+    return (total_investment, current_value, total_tax_free, rateEUR.rate, rateUSD.rate, last_updated, out)

apps/monitor/templates/monitor.html

@@ -4,6 +4,7 @@
 <div class="form-box">
   <h2>Monitor</h2>
   <a href="/monitor" class="button button-primary">Refresh</a><br/>
+  <font size="-1">last update: {{last_updated|date:'Y-m-d H:i:s'}} ({{django_timezone}})</font><br/>
   <p>Hint: these numbers are not very accurate.</p>
 
   Total investment: {{total_investment|floatformat:2}} EUR<br/>

apps/monitor/views.py

@@ -1,5 +1,7 @@
 from django.shortcuts import render, redirect
 from django.contrib.auth.decorators import login_required
+from django.conf import settings
+import pytz
 from apps.transactions.models import Transaction
 from apps.rates.models import ExchangeRate
 from apps.monitor.calc import Calc
@@ -13,14 +15,23 @@ def monitor(request):
     total_investment = 0
     current_value = 0
     total_tax_free = 0
+    last_updated = None
     calc = Calc()
 
     for crypto in crypto_currencies:
-        (total_investment, current_value, total_tax_free, rateEUR, rateUSD, out2) = calc.GetCurrentValue(request.user.id, crypto, total_investment, current_value, total_tax_free)
+        (total_investment, current_value, total_tax_free, rateEUR, rateUSD, last_updated, out2) = calc.GetCurrentValue(request.user.id, crypto, total_investment, current_value, total_tax_free)
 
         cryptos.append({"crypto": crypto, "rateEUR": rateEUR, "rateUSD": rateUSD, **out2})
 
-    return render(request,"monitor.html",{'cryptos':cryptos, 'total_tax_free': total_tax_free, 'total_investment': total_investment, 'current_value': current_value})
+    django_timezone = pytz.timezone(settings.TIME_ZONE)
+
+    return render(request,"monitor.html",
+            {'cryptos':cryptos,
+                'total_tax_free': total_tax_free,
+                'total_investment': total_investment,
+                'current_value': current_value,
+                'last_updated': last_updated,
+                'django_timezone': django_timezone})
 
 @login_required
 def graph(request):

requirements.txt

@@ -1,4 +1,5 @@
 django
 django-registration
+pytz
 matplotlib
 btcde

walletmonitor/settings_local.py.example

@@ -15,3 +15,4 @@ EMAIL_USE_TLS = True
 
 SITE_ID = 1
 ABOUT_URL = 'https://about.example.com'
+TIME_ZONE = 'Europe/Amsterdam'