From ea69d02af6e691a1b32e5198a1143aa142ba82ac Mon Sep 17 00:00:00 2001
From: Julio Capote <jcapote@gmail.com>
Date: Fri, 6 Jan 2023 14:31:20 -0500
Subject: subscription lookup on outbox item create

---
 cgi/servers.go      | 13 ++++++++++++-
 models/persister.go | 17 +++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/cgi/servers.go b/cgi/servers.go
index 9d08b6c..a419417 100644
--- a/cgi/servers.go
+++ b/cgi/servers.go
@@ -116,7 +116,18 @@ func processTick(h config.Handler, output []byte, persister *models.Persister, l
 			log.Debugf("extracted content '%s'", extractedContent)
 			outboxItem := models.CreateOutboxItem(h, []byte(extractedContent))
 			err = persister.StoreWithCallback(outboxItem, func() {
-				log.With("handler", h.Name).Debug("callback for save")
+				logger := log.With("handler", h.Name).With("type", "subscription")
+				// go through handler subscriptions and deliver signed outbox items
+				logger.Debug("callback for save")
+				sub := models.NewSubscription(h)
+				keys, err := persister.CollectKeys(sub)
+				if err != nil {
+					logger.Error(err)
+					return
+				}
+				for _, v := range keys {
+					logger.Debugf("found subscription %s", string(v))
+				}
 			})
 			if err != nil {
 				return err
diff --git a/models/persister.go b/models/persister.go
index f877488..b4b9c49 100644
--- a/models/persister.go
+++ b/models/persister.go
@@ -98,6 +98,23 @@ func (p *Persister) Collect(model model) ([][]byte, error) {
 	return result, err
 }
 
+// Much faster, "keys only" version of Collect()
+func (p *Persister) CollectKeys(model model) ([][]byte, error) {
+	var keys [][]byte
+	err := p.db.View(func(txn *badger.Txn) error {
+		opts := badger.DefaultIteratorOptions
+		opts.PrefetchValues = false
+		it := txn.NewIterator(opts)
+		defer it.Close()
+		prefix := []byte(model.Keybase())
+		for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() {
+			keys = append(keys, it.Item().Key())
+		}
+		return nil
+	})
+	return keys, err
+}
+
 func (p *Persister) Find(model model) ([]byte, error) {
 	var result []byte
 	var item *badger.Item
-- 
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