From f8db8c86368f44afda1139f947d6d5dfc095f04e Mon Sep 17 00:00:00 2001
From: Maksym Pavlenko <pavlenko.maksym@gmail.com>
Date: Sun, 7 Apr 2019 22:07:38 -0700
Subject: [PATCH] Use cache for error feeds to reduce spamming

---
 pkg/builders/lambda.go | 2 +-
 pkg/feeds/feeds.go     | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/builders/lambda.go b/pkg/builders/lambda.go
index e5c873c..634b27f 100644
--- a/pkg/builders/lambda.go
+++ b/pkg/builders/lambda.go
@@ -69,7 +69,7 @@ func (l *Lambda) Build(feed *model.Feed) error {
 	}
 
 	if out.ErrorMessage != "" {
-		return errors.Errorf("lambda error: %s", out.ErrorMessage)
+		return errors.New(out.ErrorMessage)
 	}
 
 	feed.LastID = out.LastID
diff --git a/pkg/feeds/feeds.go b/pkg/feeds/feeds.go
index ed5be21..2495fc4 100644
--- a/pkg/feeds/feeds.go
+++ b/pkg/feeds/feeds.go
@@ -175,6 +175,10 @@ func (s *Service) BuildFeed(hashID string) ([]byte, error) {
 
 	if err := builder.Build(feed); err != nil {
 		logger.WithError(err).Error("failed to build feed")
+
+		// Save error to cache to avoid spamming
+		_ = s.cache.Set(hashID, err.Error(), 10 * time.Minute)
+
 		return nil, err
 	}