From f0738a93c3d42bec580d69f8a0df6306e3f357c2 Mon Sep 17 00:00:00 2001
From: Yuval Langer <yuval.langer@gmail.com>
Date: Sat, 12 May 2018 00:02:43 +0300
Subject: [PATCH] [WIP] Colorize username sent to IRC using its crc32 IEEE
 checksum (#423)

* Colorize username sent to IRC using its crc32 IEEE checksum

* Add `ColorNicks` configuration variable

* Add `ColorNicks` setting
---
 bridge/config/config.go  |  1 +
 bridge/irc/irc.go        | 10 ++++++++--
 matterbridge.toml.sample |  4 ++++
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/bridge/config/config.go b/bridge/config/config.go
index 0b92783e..1627adc2 100644
--- a/bridge/config/config.go
+++ b/bridge/config/config.go
@@ -62,6 +62,7 @@ type Protocol struct {
 	BindAddress            string // mattermost, slack // DEPRECATED
 	Buffer                 int    // api
 	Charset                string // irc
+	ColorNicks             bool   // only irc for now
 	Debug                  bool   // general
 	DebugLevel             int    // only for irc now
 	EditSuffix             string // mattermost, slack, discord, telegram, gitter
diff --git a/bridge/irc/irc.go b/bridge/irc/irc.go
index 1e26b770..cb0a6fe7 100644
--- a/bridge/irc/irc.go
+++ b/bridge/irc/irc.go
@@ -12,6 +12,7 @@ import (
 	"github.com/paulrosania/go-charset/charset"
 	_ "github.com/paulrosania/go-charset/data"
 	"github.com/saintfish/chardet"
+	"hash/crc32"
 	"io"
 	"io/ioutil"
 	"net"
@@ -246,11 +247,16 @@ func (b *Birc) doSend() {
 	throttle := time.NewTicker(rate)
 	for msg := range b.Local {
 		<-throttle.C
+		username := msg.Username
+		if b.GetBool("Colornicks") {
+			checksum := crc32.ChecksumIEEE([]byte(msg.Username))
+			username = fmt.Sprintf("\x03%d%s\x03", checksum%0x10, msg.Username)
+		}
 		if msg.Event == config.EVENT_USER_ACTION {
-			b.i.Cmd.Action(msg.Channel, msg.Username+msg.Text)
+			b.i.Cmd.Action(msg.Channel, username+msg.Text)
 		} else {
 			b.Log.Debugf("Sending to channel %s", msg.Channel)
-			b.i.Cmd.Message(msg.Channel, msg.Username+msg.Text)
+			b.i.Cmd.Message(msg.Channel, username+msg.Text)
 		}
 	}
 }
diff --git a/matterbridge.toml.sample b/matterbridge.toml.sample
index e2558cbb..bf9e147b 100644
--- a/matterbridge.toml.sample
+++ b/matterbridge.toml.sample
@@ -92,6 +92,10 @@ MessageSplit=false
 #OPTIONAL (default 0)
 RejoinDelay=0
 
+#ColorNicks will show each nickname in a different color.
+#Only works in IRC right now.
+ColorNicks=false
+
 #Nicks you want to ignore. 
 #Messages from those users will not be sent to other bridges.
 #OPTIONAL