From e4a95c5c7a2e43d5c4f6976f6d983b11d3135dfd Mon Sep 17 00:00:00 2001
From: Wim <wim@42.be>
Date: Sun, 6 Feb 2022 23:25:02 +0100
Subject: [PATCH] Make sure MessageLength and MessageSplit work as documented.
 Fixes #1540

---
 bridge/helper/helper.go |  8 ++------
 bridge/irc/irc.go       | 15 ++++++++++++---
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/bridge/helper/helper.go b/bridge/helper/helper.go
index fb65d8d930..43bc1539dd 100644
--- a/bridge/helper/helper.go
+++ b/bridge/helper/helper.go
@@ -80,10 +80,6 @@ func DownloadFileAuthRocket(url, token, userID string) (*[]byte, error) {
 // word boundaries when splitting but this is hard to solve without potentially
 // breaking formatting and other stylistic effects.
 func GetSubLines(message string, maxLineLength int, clippingMessage string) []string {
-	if clippingMessage == "" {
-		clippingMessage = " <clipped message>"
-	}
-
 	var lines []string
 	for _, line := range strings.Split(strings.TrimSpace(message), "\n") {
 		if maxLineLength == 0 || len([]byte(line)) <= maxLineLength {
@@ -98,8 +94,8 @@ func GetSubLines(message string, maxLineLength int, clippingMessage string) []st
 		var splitStart int
 		var startOfPreviousRune int
 		for i := range line {
-			if i-splitStart > maxLineLength-len([]byte(clippingMessage)) {
-				lines = append(lines, line[splitStart:startOfPreviousRune]+clippingMessage)
+			if i-splitStart > maxLineLength {
+				lines = append(lines, line[splitStart:startOfPreviousRune])
 				splitStart = startOfPreviousRune
 			}
 			startOfPreviousRune = i
diff --git a/bridge/irc/irc.go b/bridge/irc/irc.go
index 4b7b144b3e..43013c0855 100644
--- a/bridge/irc/irc.go
+++ b/bridge/irc/irc.go
@@ -25,7 +25,7 @@ import (
 
 type Birc struct {
 	i                                         *girc.Client
-	Nick                                      string
+	Nick, MessageClipped                      string
 	names                                     map[string][]string
 	connected                                 chan error
 	Local                                     chan config.Message // local queue for flood control
@@ -172,10 +172,11 @@ func (b *Birc) Send(msg config.Message) (string, error) {
 	}
 
 	if b.GetBool("MessageSplit") {
-		msgLines = helper.GetSubLines(msg.Text, b.MessageLength, b.GetString("MessageClipped"))
+		msgLines = helper.GetSubLines(msg.Text, b.MessageLength, "")
 	} else {
-		msgLines = helper.GetSubLines(msg.Text, 0, b.GetString("MessageClipped"))
+		msgLines = []string{helper.GetSubLines(msg.Text, b.MessageLength, "")[0] + b.getMessageClipped()}
 	}
+
 	for i := range msgLines {
 		if len(b.Local) >= b.MessageQueue {
 			b.Log.Debugf("flooding, dropping message (queue at %d)", len(b.Local))
@@ -411,3 +412,11 @@ func (b *Birc) getTLSConfig() (*tls.Config, error) {
 
 	return tlsConfig, nil
 }
+
+func (b *Birc) getMessageClipped() string {
+	if b.GetString("MessageClipped") == "" {
+		return " <clipped message>"
+	} else {
+		return " " + b.GetString("MessageClipped")
+	}
+}