From d7973a98fe0f79100201a320bccccc680952d359 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Mon, 4 May 2020 18:54:45 +0200
Subject: [PATCH] IRC autorejoin on reconnect

---
 connector/irc/irc.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/connector/irc/irc.go b/connector/irc/irc.go
index 19e73fc..77388e7 100644
--- a/connector/irc/irc.go
+++ b/connector/irc/irc.go
@@ -25,6 +25,8 @@ type IRC struct {
 	name   string
 	server string
 	conn   *girc.Client
+
+	joinedRooms map[string]bool
 }
 
 func (irc *IRC) SetHandler(h Handler) {
@@ -95,6 +97,8 @@ func (irc *IRC) Configure(c Configuration) error {
 	client.Handlers.Add(girc.TOPIC, irc.ircTopic)
 	client.Handlers.Add(girc.RPL_TOPIC, irc.ircRplTopic)
 
+	irc.joinedRooms = make(map[string]bool)
+
 	irc.conn = client
 	go irc.connectLoop(client)
 
@@ -300,6 +304,12 @@ func (irc *IRC) ircConnected(c *girc.Client, e girc.Event) {
 	irc.handler.SystemMessage("Connected to IRC.")
 	irc.timeout = 10
 	irc.connected = true
+
+	for room, joined := range irc.joinedRooms {
+		if joined {
+			irc.conn.Cmd.Join(room)
+		}
+	}
 }
 
 func (irc *IRC) ircPrivmsg(c *girc.Client, e girc.Event) {
@@ -321,6 +331,7 @@ func (irc *IRC) ircJoin(c *girc.Client, e girc.Event) {
 	room := RoomID(e.Params[0] + "@" + irc.server)
 	if e.Source.Name == irc.nick {
 		irc.handler.Joined(room)
+		irc.joinedRooms[e.Params[0]] = true
 	} else {
 		user := UserID(e.Source.Name + "@" + irc.server)
 		ev := &Event{
@@ -339,6 +350,7 @@ func (irc *IRC) ircPart(c *girc.Client, e girc.Event) {
 	room := RoomID(e.Params[0] + "@" + irc.server)
 	if e.Source.Name == irc.nick {
 		irc.handler.Left(room)
+		delete(irc.joinedRooms, e.Params[0])
 	} else {
 		user := UserID(e.Source.Name + "@" + irc.server)
 		ev := &Event{