From a1bf37e4577b393bbc4fcaa0ca6d71ef3e7a3fee Mon Sep 17 00:00:00 2001
From: Duco van Amstel <duco.vanamstel@gmail.com>
Date: Wed, 7 Nov 2018 16:25:00 +0000
Subject: Do not join Slack channel without API access (slack) (#563)

---
 bridge/slack/slack.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/bridge/slack/slack.go b/bridge/slack/slack.go
index d2d118b2..924f4131 100644
--- a/bridge/slack/slack.go
+++ b/bridge/slack/slack.go
@@ -147,6 +147,11 @@ func (b *Bslack) Disconnect() error {
 // allow apps or bots to join channels themselves and they need to be invited
 // manually by a user.
 func (b *Bslack) JoinChannel(channel config.ChannelInfo) error {
+	// We can only join a channel through the Slack API.
+	if b.sc == nil {
+		return nil
+	}
+
 	b.populateChannels()
 
 	channelInfo, err := b.getChannel(channel.Name)
-- 
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