Add API route for vending card balance

apiserver/apiserver/api/views.py

@@ -1082,8 +1082,6 @@ class ProtocoinViewSet(Base):
         source_user_balance = source_user.transactions.aggregate(Sum('protocoin'))['protocoin__sum']
         source_user_balance = float(source_user_balance)
 
-        print(source_user_balance)
-
         if source_user_balance != balance:
             raise exceptions.ValidationError(dict(balance='Incorrect current balance.'))
 
@@ -1125,6 +1123,24 @@ class ProtocoinViewSet(Base):
 
         return Response(200)
 
+    @action(detail=True, methods=['get'])
+    def card_vend_balance(self, request, pk=None):
+        auth_token = request.META.get('HTTP_AUTHORIZATION', '')
+        if secrets.VEND_API_TOKEN and auth_token != 'Bearer ' + secrets.VEND_API_TOKEN:
+            raise exceptions.PermissionDenied()
+
+        card = get_object_or_404(models.Card, card_number=pk)
+        user = card.user
+
+        user_balance = user.transactions.aggregate(Sum('protocoin'))['protocoin__sum']
+        user_balance = float(user_balance)
+
+        res = dict(
+            balance=user_balance,
+            first_name=user.member.first_name,
+        )
+        return Response(res)
+
 
 
 class RegistrationView(RegisterView):

apiserver/apiserver/secrets.py.example

@@ -56,6 +56,12 @@ AUTH_API_KEY = ''
 # head /dev/urandom | base32 | head -c 40
 DOOR_API_TOKEN = ''
 
+# Vending machine cards API token
+# Set this to random characters
+# For example, use the output of this:
+# head /dev/urandom | base32 | head -c 40
+VEND_API_TOKEN = ''
+
 # Protospace general info
 DOOR_CODE = ''
 WIFI_PASS = ''

webclient/src/Paymaster.js

@@ -92,7 +92,7 @@ export function Paymaster(props) {
 			<Header size='medium'>Protocoin</Header>
 			<p>Protocoin is used to buy things from Protospace's vending machines.</p>
 
-			<p>Current balance: ₱&thinsp;{user.member.protocoin}</p>
+			<p>Current balance: ₱&thinsp;{user.member.protocoin.toFixed(2)}</p>
 
 			<Grid stackable padded columns={2}>
 				<Grid.Column width={5}>