1 files changed, 70 insertions, 0 deletions
diff --git a/dashboard/app/cache.go b/dashboard/app/cache.go
new file mode 100644
index 000000000..574324518
--- /dev/null
+++ b/dashboard/app/cache.go
@@ -0,0 +1,70 @@
+// Copyright 2020 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/appengine/memcache"
+)
+
+type Cached struct {
+	Open    int
+	Fixed   int
+	Invalid int
+}
+
+func CacheGet(c context.Context, r *http.Request, ns string) (*Cached, error) {
+	accessLevel := accessLevel(c, r)
+	key := fmt.Sprintf("%v-%v", ns, accessLevel)
+	v := new(Cached)
+	_, err := memcache.Gob.Get(c, key, v)
+	if err != nil && err != memcache.ErrCacheMiss {
+		return nil, err
+	}
+	if err == nil {
+		return v, nil
+	}
+	if v, err = buildCached(c, ns, accessLevel); err != nil {
+		return nil, err
+	}
+	item := &memcache.Item{
+		Key:        key,
+		Object:     v,
+		Expiration: time.Hour,
+	}
+	if err := memcache.Gob.Set(c, item); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+func buildCached(c context.Context, ns string, accessLevel AccessLevel) (*Cached, error) {
+	v := &Cached{}
+	bugs, _, err := loadNamespaceBugs(c, ns)
+	if err != nil {
+		return nil, err
+	}
+	for _, bug := range bugs {
+		switch bug.Status {
+		case BugStatusOpen:
+			if accessLevel < bug.sanitizeAccess(accessLevel) {
+				continue
+			}
+			if len(bug.Commits) == 0 {
+				v.Open++
+			} else {
+				v.Fixed++
+			}
+		case BugStatusFixed:
+			v.Fixed++
+		case BugStatusInvalid:
+			v.Invalid++
+		}
+	}
+	return v, nil
+}