From b257c5955e9b4511e9bb22a26a97735417879584 Mon Sep 17 00:00:00 2001
From: Daniel Oaks <daniel@danieloaks.net>
Date: Fri, 20 Jan 2017 23:51:36 +1000
Subject: [PATCH] client: Add SendForceTrailing function, to force the last
 param to be a trailing

---
 irc/client.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/irc/client.go b/irc/client.go
index 42cf0944..1e2da8cc 100644
--- a/irc/client.go
+++ b/irc/client.go
@@ -12,6 +12,7 @@ import (
 	"net"
 	"runtime/debug"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/DanielOaks/girc-go/ircmsg"
@@ -535,6 +536,16 @@ func (client *Client) SendFromClient(msgid string, from *Client, tags *map[strin
 
 // Send sends an IRC line to the client.
 func (client *Client) Send(tags *map[string]ircmsg.TagValue, prefix string, command string, params ...string) error {
+	return client.send(false, tags, prefix, command, params...)
+}
+
+// SendForceTrailing sends an IRC line to the client, forcing the last param to be a trailing.
+// This is a hack. However, there are clients that treat special chars differently.
+func (client *Client) SendForceTrailing(tags *map[string]ircmsg.TagValue, prefix string, command string, params ...string) error {
+	return client.send(true, tags, prefix, command, params...)
+}
+
+func (client *Client) send(forceTrailing bool, tags *map[string]ircmsg.TagValue, prefix string, command string, params ...string) error {
 	// attach server-time
 	if client.capabilities[ServerTime] {
 		if tags == nil {
@@ -544,6 +555,16 @@ func (client *Client) Send(tags *map[string]ircmsg.TagValue, prefix string, comm
 		}
 	}
 
+	// force trailing
+	var usedSpaceHack bool
+	if forceTrailing && len(params) > 0 {
+		lastParam := params[len(params)-1]
+		if !strings.Contains(lastParam, " ") {
+			params[len(params)-1] = lastParam + " "
+			usedSpaceHack = true
+		}
+	}
+
 	// send out the message
 	message := ircmsg.MakeMessage(tags, prefix, command, params...)
 	maxlenTags, maxlenRest := client.maxlens()
@@ -559,6 +580,12 @@ func (client *Client) Send(tags *map[string]ircmsg.TagValue, prefix string, comm
 		client.socket.Write(line)
 		return err
 	}
+
+	// strip space hack if we used it
+	if usedSpaceHack {
+		line = line[:len(line)-3] + "\r\n"
+	}
+
 	client.socket.Write(line)
 	return nil
 }