From 9d9cb32f4efa78fcdbb49a84d221b5e731c336c2 Mon Sep 17 00:00:00 2001
From: Wim <wim@42.be>
Date: Mon, 29 May 2017 21:54:34 +0200
Subject: [PATCH] Limit message length (irc). Closes #179

---
 bridge/config/config.go  | 1 +
 bridge/irc/irc.go        | 6 ++++++
 matterbridge.toml.sample | 7 ++++++-
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/bridge/config/config.go b/bridge/config/config.go
index 2cd53666..243f6601 100644
--- a/bridge/config/config.go
+++ b/bridge/config/config.go
@@ -59,6 +59,7 @@ type Protocol struct {
 	Protocol               string //all protocols
 	MessageQueue           int    // IRC, size of message queue for flood control
 	MessageDelay           int    // IRC, time in millisecond to wait between messages
+	MessageLength          int    // IRC, max length of a message allowed
 	MessageFormat          string // telegram
 	RemoteNickFormat       string // all protocols
 	Server                 string // IRC,mattermost,XMPP,discord
diff --git a/bridge/irc/irc.go b/bridge/irc/irc.go
index a9a23529..8bb8896e 100644
--- a/bridge/irc/irc.go
+++ b/bridge/irc/irc.go
@@ -46,6 +46,9 @@ func New(cfg config.Protocol, account string, c chan config.Message) *Birc {
 	if b.Config.MessageQueue == 0 {
 		b.Config.MessageQueue = 30
 	}
+	if b.Config.MessageLength == 0 {
+		b.Config.MessageLength = 400
+	}
 	return b
 }
 
@@ -111,6 +114,9 @@ func (b *Birc) Send(msg config.Message) error {
 		b.Command(&msg)
 	}
 	for _, text := range strings.Split(msg.Text, "\n") {
+		if len(text) > b.Config.MessageLength {
+			text = text[:b.Config.MessageLength] + " <message clipped>"
+		}
 		if len(b.Local) < b.Config.MessageQueue {
 			if len(b.Local) == b.Config.MessageQueue-1 {
 				text = text + " <message clipped>"
diff --git a/matterbridge.toml.sample b/matterbridge.toml.sample
index f4d9af7a..4e1a3f70 100644
--- a/matterbridge.toml.sample
+++ b/matterbridge.toml.sample
@@ -48,10 +48,15 @@ MessageDelay=1300
 
 #Maximum amount of messages to hold in queue. If queue is full 
 #messages will be dropped. 
-#<clipped> will be add to the message that fills the queue.
+#<message clipped> will be add to the message that fills the queue.
 #OPTIONAL (default 30)
 MessageQueue=30
 
+#Maximum length of message sent to irc server. If it exceeds
+#<message clipped> will be add to the message.
+#OPTIONAL (default 400)
+MessageLength=400
+
 #Nicks you want to ignore. 
 #Messages from those users will not be sent to other bridges.
 #OPTIONAL