Added GET with team filter.

www/~/%username/subscriptions.json.spt

@@ -1,8 +1,9 @@
 """ Get or change authenticated user's subscriptions.
 """
 from aspen import Response
+from gratipay.exceptions import NoTeam
 
-[--------------------------------------------------------]
+[------------------------------------------------------------------------]
 
 if user.ANON:
     raise Response(403, _("Please sign in first."))
@@ -11,16 +12,30 @@ else:
     participant = user.participant
 
     if request.method == 'GET':
-        subscriptions, totals = participant.get_giving_for_profile()
-        out = []
-        for s in subscriptions:
-            out.append({ "team_slug": s.team_slug,
-                         "team_name": s.team_name,
-                            "amount": str(s.amount),
-                               "due": str(s.due),
-                             "ctime": s.ctime,
-                             "mtime": s.mtime
-                       })
+        slug = request.qs.get("team_slug", "")
+
+        if slug: # Get subscription info only for this team.
+            try:
+                subscription = participant.get_payment_instruction(slug)
+            except NoTeam:
+                raise Response(400, _("Invalid team name."))
+            out = {
+                    "amount" : str(subscription['amount']),
+                     "ctime" : subscription['ctime'],
+                     "mtime" : subscription['mtime']
+                  }
+        else: # Get subscription info for all teams.
+            subscriptions, totals = participant.get_giving_for_profile()
+
+            out = []
+            for s in subscriptions:
+                out.append({ "team_slug": s.team_slug,
+                             "team_name": s.team_name,
+                                "amount": str(s.amount),
+                                   "due": str(s.due),
+                                 "ctime": s.ctime,
+                                 "mtime": s.mtime
+                           })
 
 [---] application/json
 out