From 754d731ec3a205833993f532dfa9e9364fe9a4dc Mon Sep 17 00:00:00 2001
From: Shivaram Lingamneni <slingamn@cs.stanford.edu>
Date: Sun, 15 Jun 2025 17:48:51 -0400
Subject: [PATCH] replay existing metadata to reattaching always-on clients

---
 irc/handlers.go | 21 +++++++++++----------
 irc/server.go   |  3 +++
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/irc/handlers.go b/irc/handlers.go
index f45d0e7e..e1a59ad5 100644
--- a/irc/handlers.go
+++ b/irc/handlers.go
@@ -3226,16 +3226,7 @@ func metadataHandler(server *Server, client *Client, msg ircmsg.Message, rb *Res
 		}
 
 	case "list":
-		values := targetObj.ListMetadata()
-
-		batchId := rb.StartNestedBatch("metadata")
-		defer rb.EndNestedBatch(batchId)
-
-		for key, val := range values {
-			visibility := "*"
-
-			rb.Add(nil, server.name, RPL_KEYVALUE, client.Nick(), originalTarget, key, visibility, val)
-		}
+		playMetadataList(rb, client.Nick(), target, targetObj.ListMetadata())
 
 	case "clear":
 		if !metadataCanIEditThisTarget(client, targetObj) {
@@ -3306,6 +3297,16 @@ func metadataHandler(server *Server, client *Client, msg ircmsg.Message, rb *Res
 	return
 }
 
+func playMetadataList(rb *ResponseBuffer, nick, target string, values map[string]string) {
+	batchId := rb.StartNestedBatch("metadata")
+	defer rb.EndNestedBatch(batchId)
+
+	for key, val := range values {
+		visibility := "*"
+		rb.Add(nil, rb.session.client.server.name, RPL_KEYVALUE, nick, target, key, visibility, val)
+	}
+}
+
 // REHASH
 func rehashHandler(server *Server, client *Client, msg ircmsg.Message, rb *ResponseBuffer) bool {
 	nick := client.Nick()
diff --git a/irc/server.go b/irc/server.go
index 5974f633..4b23fe8a 100644
--- a/irc/server.go
+++ b/irc/server.go
@@ -496,6 +496,9 @@ func (server *Server) playRegistrationBurst(session *Session) {
 	if !(rb.session.capabilities.Has(caps.ExtendedISupport) && rb.session.isupportSentPrereg) {
 		server.RplISupport(c, rb)
 	}
+	if session.capabilities.Has(caps.Metadata) && c.AlwaysOn() {
+		playMetadataList(rb, d.nick, d.nick, c.ListMetadata())
+	}
 	if d.account != "" && session.capabilities.Has(caps.Persistence) {
 		reportPersistenceStatus(c, rb, false)
 	}