dashboard/app: cache per-namespace bug stats

We used to show number of fixed bugs at the top of the main page.
However, now with the button nagivation, "fixed" is shown on every page.
Fetching and processing all bugs on every page would be unwise.
Cache these stats in memcache. It will be useful to show more stats in future.

1 files changed, 6 insertions, 0 deletions

diff --git a/dashboard/app/handler.go b/dashboard/app/handler.go
index ed55831d8..2daa203d1 100644
--- a/dashboard/app/handler.go
+++ b/dashboard/app/handler.go
@@ -97,6 +97,7 @@ type uiHeader struct {
 	AnalyticsTrackingID string
 	Subpage             string
 	Namespace           string
+	Cached              *Cached
 	Namespaces          []uiNamespace
 }
 
@@ -171,6 +172,11 @@ func commonHeader(c context.Context, r *http.Request, w http.ResponseWriter, ns
 		h.Namespace = ns
 		cookie.Namespace = ns
 		encodeCookie(w, cookie)
+		cached, err := CacheGet(c, r, ns)
+		if err != nil {
+			return nil, err
+		}
+		h.Cached = cached
 	}
 	return h, nil
 }