optimize counts go get them directly

app/store/bolt.go

@@ -550,7 +550,7 @@ func (b *BoltDB) count(tx *bolt.Tx, postURL string, val int) (int, error) {
 	if countVal == nil {
 		countVal = itob(0)
 	}
-	if val == 0 {
+	if val == 0 { // get current count, don't update
 		return btoi(countVal), nil
 	}
 	updatedCount := btoi(countVal) + val

app/store/service.go

@@ -81,18 +81,11 @@ func (s *Service) EditComment(locator Locator, commentID string, text string, ed
 }
 
 // Counts returns postID+count list for given comments
-func (s *Service) Counts(siteID string, commentIDs []string) ([]PostInfo, error) {
-	list, err := s.List(siteID, 0, 0)
-	if err != nil {
-		return nil, err
-	}
-
+func (s *Service) Counts(siteID string, postIDs []string) ([]PostInfo, error) {
 	res := []PostInfo{}
-	for _, p := range commentIDs {
-		for _, l := range list {
-			if p == l.URL {
-				res = append(res, l)
-			}
+	for _, p := range postIDs {
+		if c, err := s.Count(Locator{SiteID: siteID, URL: p}); err == nil {
+			res = append(res, PostInfo{URL: p, Count: c})
 		}
 	}
 	return res, nil

app/store/service_test.go

@@ -143,5 +143,6 @@ func TestService_Counts(t *testing.T) {
 	assert.Equal(t, []PostInfo{
 		PostInfo{URL: "https://radio-t.com", Count: 2},
 		PostInfo{URL: "https://radio-t.com/2", Count: 1},
+		PostInfo{URL: "blah", Count: 0},
 	}, res)
 }