Vendor libs

5 files changed, 803 insertions, 0 deletions

diff --git a/vendor/github.com/thoj/go-ircevent/LICENSE b/vendor/github.com/thoj/go-ircevent/LICENSE
new file mode 100644
index 00000000..d6bf3577
--- /dev/null
+++ b/vendor/github.com/thoj/go-ircevent/LICENSE
@@ -0,0 +1,27 @@
+// Copyright (c) 2009 Thomas Jager. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/thoj/go-ircevent/irc.go b/vendor/github.com/thoj/go-ircevent/irc.go
new file mode 100644
index 00000000..9043e888
--- /dev/null
+++ b/vendor/github.com/thoj/go-ircevent/irc.go
@@ -0,0 +1,473 @@
+// Copyright 2009 Thomas Jager <mail@jager.no>  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+This package provides an event based IRC client library. It allows to
+register callbacks for the events you need to handle. Its features
+include handling standard CTCP, reconnecting on errors and detecting
+stones servers.
+Details of the IRC protocol can be found in the following RFCs:
+https://tools.ietf.org/html/rfc1459
+https://tools.ietf.org/html/rfc2810
+https://tools.ietf.org/html/rfc2811
+https://tools.ietf.org/html/rfc2812
+https://tools.ietf.org/html/rfc2813
+The details of the client-to-client protocol (CTCP) can be found here: http://www.irchelp.org/irchelp/rfc/ctcpspec.html
+*/
+
+package irc
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	VERSION = "go-ircevent v2.1"
+)
+
+var ErrDisconnected = errors.New("Disconnect Called")
+
+// Read data from a connection. To be used as a goroutine.
+func (irc *Connection) readLoop() {
+	defer irc.Done()
+	br := bufio.NewReaderSize(irc.socket, 512)
+
+	errChan := irc.ErrorChan()
+
+	for {
+		select {
+		case <-irc.end:
+			return
+		default:
+			// Set a read deadline based on the combined timeout and ping frequency
+			// We should ALWAYS have received a response from the server within the timeout
+			// after our own pings
+			if irc.socket != nil {
+				irc.socket.SetReadDeadline(time.Now().Add(irc.Timeout + irc.PingFreq))
+			}
+
+			msg, err := br.ReadString('\n')
+
+			// We got past our blocking read, so bin timeout
+			if irc.socket != nil {
+				var zero time.Time
+				irc.socket.SetReadDeadline(zero)
+			}
+
+			if err != nil {
+				errChan <- err
+				return
+			}
+
+			if irc.Debug {
+				irc.Log.Printf("<-- %s\n", strings.TrimSpace(msg))
+			}
+
+			irc.lastMessage = time.Now()
+			event, err := parseToEvent(msg)
+			event.Connection = irc
+			if err == nil {
+				/* XXX: len(args) == 0: args should be empty */
+				irc.RunCallbacks(event)
+			}
+		}
+	}
+}
+
+//Parse raw irc messages
+func parseToEvent(msg string) (*Event, error) {
+	msg = strings.TrimSuffix(msg, "\n") //Remove \r\n
+	msg = strings.TrimSuffix(msg, "\r")
+	event := &Event{Raw: msg}
+	if len(msg) < 5 {
+		return nil, errors.New("Malformed msg from server")
+	}
+	if msg[0] == ':' {
+		if i := strings.Index(msg, " "); i > -1 {
+			event.Source = msg[1:i]
+			msg = msg[i+1 : len(msg)]
+
+		} else {
+			return nil, errors.New("Malformed msg from server")
+		}
+
+		if i, j := strings.Index(event.Source, "!"), strings.Index(event.Source, "@"); i > -1 && j > -1 && i < j {
+			event.Nick = event.Source[0:i]
+			event.User = event.Source[i+1 : j]
+			event.Host = event.Source[j+1 : len(event.Source)]
+		}
+	}
+
+	split := strings.SplitN(msg, " :", 2)
+	args := strings.Split(split[0], " ")
+	event.Code = strings.ToUpper(args[0])
+	event.Arguments = args[1:]
+	if len(split) > 1 {
+		event.Arguments = append(event.Arguments, split[1])
+	}
+	return event, nil
+
+}
+
+// Loop to write to a connection. To be used as a goroutine.
+func (irc *Connection) writeLoop() {
+	defer irc.Done()
+	errChan := irc.ErrorChan()
+	for {
+		select {
+		case <-irc.end:
+			return
+		case b, ok := <-irc.pwrite:
+			if !ok || b == "" || irc.socket == nil {
+				return
+			}
+
+			if irc.Debug {
+				irc.Log.Printf("--> %s\n", strings.TrimSpace(b))
+			}
+
+			// Set a write deadline based on the time out
+			irc.socket.SetWriteDeadline(time.Now().Add(irc.Timeout))
+
+			_, err := irc.socket.Write([]byte(b))
+
+			// Past blocking write, bin timeout
+			var zero time.Time
+			irc.socket.SetWriteDeadline(zero)
+
+			if err != nil {
+				errChan <- err
+				return
+			}
+		}
+	}
+	return
+}
+
+// Pings the server if we have not received any messages for 5 minutes
+// to keep the connection alive. To be used as a goroutine.
+func (irc *Connection) pingLoop() {
+	defer irc.Done()
+	ticker := time.NewTicker(1 * time.Minute) // Tick every minute for monitoring
+	ticker2 := time.NewTicker(irc.PingFreq)   // Tick at the ping frequency.
+	for {
+		select {
+		case <-ticker.C:
+			//Ping if we haven't received anything from the server within the keep alive period
+			if time.Since(irc.lastMessage) >= irc.KeepAlive {
+				irc.SendRawf("PING %d", time.Now().UnixNano())
+			}
+		case <-ticker2.C:
+			//Ping at the ping frequency
+			irc.SendRawf("PING %d", time.Now().UnixNano())
+			//Try to recapture nickname if it's not as configured.
+			if irc.nick != irc.nickcurrent {
+				irc.nickcurrent = irc.nick
+				irc.SendRawf("NICK %s", irc.nick)
+			}
+		case <-irc.end:
+			ticker.Stop()
+			ticker2.Stop()
+			return
+		}
+	}
+}
+
+// Main loop to control the connection.
+func (irc *Connection) Loop() {
+	errChan := irc.ErrorChan()
+	for !irc.quit {
+		err := <-errChan
+		irc.Log.Printf("Error, disconnected: %s\n", err)
+		for !irc.quit {
+			if err = irc.Reconnect(); err != nil {
+				irc.Log.Printf("Error while reconnecting: %s\n", err)
+				time.Sleep(60 * time.Second)
+			} else {
+				errChan = irc.ErrorChan()
+				break
+			}
+		}
+	}
+}
+
+// Quit the current connection and disconnect from the server
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.1.6
+func (irc *Connection) Quit() {
+	quit := "QUIT"
+
+	if irc.QuitMessage != "" {
+		quit = fmt.Sprintf("QUIT :%s", irc.QuitMessage)
+	}
+
+	irc.SendRaw(quit)
+	irc.stopped = true
+	irc.quit = true
+}
+
+// Use the connection to join a given channel.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.2.1
+func (irc *Connection) Join(channel string) {
+	irc.pwrite <- fmt.Sprintf("JOIN %s\r\n", channel)
+}
+
+// Leave a given channel.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.2.2
+func (irc *Connection) Part(channel string) {
+	irc.pwrite <- fmt.Sprintf("PART %s\r\n", channel)
+}
+
+// Send a notification to a nickname. This is similar to Privmsg but must not receive replies.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.4.2
+func (irc *Connection) Notice(target, message string) {
+	irc.pwrite <- fmt.Sprintf("NOTICE %s :%s\r\n", target, message)
+}
+
+// Send a formated notification to a nickname.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.4.2
+func (irc *Connection) Noticef(target, format string, a ...interface{}) {
+	irc.Notice(target, fmt.Sprintf(format, a...))
+}
+
+// Send (action) message to a target (channel or nickname).
+// No clear RFC on this one...
+func (irc *Connection) Action(target, message string) {
+	irc.pwrite <- fmt.Sprintf("PRIVMSG %s :\001ACTION %s\001\r\n", target, message)
+}
+
+// Send formatted (action) message to a target (channel or nickname).
+func (irc *Connection) Actionf(target, format string, a ...interface{}) {
+	irc.Action(target, fmt.Sprintf(format, a...))
+}
+
+// Send (private) message to a target (channel or nickname).
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.4.1
+func (irc *Connection) Privmsg(target, message string) {
+	irc.pwrite <- fmt.Sprintf("PRIVMSG %s :%s\r\n", target, message)
+}
+
+// Send formated string to specified target (channel or nickname).
+func (irc *Connection) Privmsgf(target, format string, a ...interface{}) {
+	irc.Privmsg(target, fmt.Sprintf(format, a...))
+}
+
+// Kick <user> from <channel> with <msg>. For no message, pass empty string ("")
+func (irc *Connection) Kick(user, channel, msg string) {
+	var cmd bytes.Buffer
+	cmd.WriteString(fmt.Sprintf("KICK %s %s", channel, user))
+	if msg != "" {
+		cmd.WriteString(fmt.Sprintf(" :%s", msg))
+	}
+	cmd.WriteString("\r\n")
+	irc.pwrite <- cmd.String()
+}
+
+// Kick all <users> from <channel> with <msg>. For no message, pass
+// empty string ("")
+func (irc *Connection) MultiKick(users []string, channel string, msg string) {
+	var cmd bytes.Buffer
+	cmd.WriteString(fmt.Sprintf("KICK %s %s", channel, strings.Join(users, ",")))
+	if msg != "" {
+		cmd.WriteString(fmt.Sprintf(" :%s", msg))
+	}
+	cmd.WriteString("\r\n")
+	irc.pwrite <- cmd.String()
+}
+
+// Send raw string.
+func (irc *Connection) SendRaw(message string) {
+	irc.pwrite <- message + "\r\n"
+}
+
+// Send raw formated string.
+func (irc *Connection) SendRawf(format string, a ...interface{}) {
+	irc.SendRaw(fmt.Sprintf(format, a...))
+}
+
+// Set (new) nickname.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.1.2
+func (irc *Connection) Nick(n string) {
+	irc.nick = n
+	irc.SendRawf("NICK %s", n)
+}
+
+// Determine nick currently used with the connection.
+func (irc *Connection) GetNick() string {
+	return irc.nickcurrent
+}
+
+// Query information about a particular nickname.
+// RFC 1459: https://tools.ietf.org/html/rfc1459#section-4.5.2
+func (irc *Connection) Whois(nick string) {
+	irc.SendRawf("WHOIS %s", nick)
+}
+
+// Query information about a given nickname in the server.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.5.1
+func (irc *Connection) Who(nick string) {
+	irc.SendRawf("WHO %s", nick)
+}
+
+// Set different modes for a target (channel or nickname).
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.2.3
+func (irc *Connection) Mode(target string, modestring ...string) {
+	if len(modestring) > 0 {
+		mode := strings.Join(modestring, " ")
+		irc.SendRawf("MODE %s %s", target, mode)
+		return
+	}
+	irc.SendRawf("MODE %s", target)
+}
+
+func (irc *Connection) ErrorChan() chan error {
+	return irc.Error
+}
+
+// Returns true if the connection is connected to an IRC server.
+func (irc *Connection) Connected() bool {
+	return !irc.stopped
+}
+
+// A disconnect sends all buffered messages (if possible),
+// stops all goroutines and then closes the socket.
+func (irc *Connection) Disconnect() {
+	for event := range irc.events {
+		irc.ClearCallback(event)
+	}
+	if irc.end != nil {
+		close(irc.end)
+	}
+
+	irc.end = nil
+
+	if irc.pwrite != nil {
+		close(irc.pwrite)
+	}
+
+	irc.Wait()
+	if irc.socket != nil {
+		irc.socket.Close()
+	}
+	irc.socket = nil
+	irc.ErrorChan() <- ErrDisconnected
+}
+
+// Reconnect to a server using the current connection.
+func (irc *Connection) Reconnect() error {
+	if irc.end != nil {
+		close(irc.end)
+	}
+
+	irc.end = nil
+
+	irc.Wait() //make sure that wait group is cleared ensuring that all spawned goroutines have completed
+
+	irc.end = make(chan struct{})
+	return irc.Connect(irc.Server)
+}
+
+// Connect to a given server using the current connection configuration.
+// This function also takes care of identification if a password is provided.
+// RFC 1459 details: https://tools.ietf.org/html/rfc1459#section-4.1
+func (irc *Connection) Connect(server string) error {
+	irc.Server = server
+	// mark Server as stopped since there can be an error during connect
+	irc.stopped = true
+
+	// make sure everything is ready for connection
+	if len(irc.Server) == 0 {
+		return errors.New("empty 'server'")
+	}
+	if strings.Count(irc.Server, ":") != 1 {
+		return errors.New("wrong number of ':' in address")
+	}
+	if strings.Index(irc.Server, ":") == 0 {
+		return errors.New("hostname is missing")
+	}
+	if strings.Index(irc.Server, ":") == len(irc.Server)-1 {
+		return errors.New("port missing")
+	}
+	// check for valid range
+	ports := strings.Split(irc.Server, ":")[1]
+	port, err := strconv.Atoi(ports)
+	if err != nil {
+		return errors.New("extracting port failed")
+	}
+	if !((port >= 0) && (port <= 65535)) {
+		return errors.New("port number outside valid range")
+	}
+	if irc.Log == nil {
+		return errors.New("'Log' points to nil")
+	}
+	if len(irc.nick) == 0 {
+		return errors.New("empty 'nick'")
+	}
+	if len(irc.user) == 0 {
+		return errors.New("empty 'user'")
+	}
+
+	if irc.UseTLS {
+		dialer := &net.Dialer{Timeout: irc.Timeout}
+		irc.socket, err = tls.DialWithDialer(dialer, "tcp", irc.Server, irc.TLSConfig)
+	} else {
+		irc.socket, err = net.DialTimeout("tcp", irc.Server, irc.Timeout)
+	}
+	if err != nil {
+		return err
+	}
+
+	irc.stopped = false
+	irc.Log.Printf("Connected to %s (%s)\n", irc.Server, irc.socket.RemoteAddr())
+
+	irc.pwrite = make(chan string, 10)
+	irc.Error = make(chan error, 2)
+	irc.Add(3)
+	go irc.readLoop()
+	go irc.writeLoop()
+	go irc.pingLoop()
+	if len(irc.Password) > 0 {
+		irc.pwrite <- fmt.Sprintf("PASS %s\r\n", irc.Password)
+	}
+	irc.pwrite <- fmt.Sprintf("NICK %s\r\n", irc.nick)
+	irc.pwrite <- fmt.Sprintf("USER %s 0.0.0.0 0.0.0.0 :%s\r\n", irc.user, irc.user)
+	return nil
+}
+
+// Create a connection with the (publicly visible) nickname and username.
+// The nickname is later used to address the user. Returns nil if nick
+// or user are empty.
+func IRC(nick, user string) *Connection {
+	// catch invalid values
+	if len(nick) == 0 {
+		return nil
+	}
+	if len(user) == 0 {
+		return nil
+	}
+
+	irc := &Connection{
+		nick:        nick,
+		nickcurrent: nick,
+		user:        user,
+		Log:         log.New(os.Stdout, "", log.LstdFlags),
+		end:         make(chan struct{}),
+		Version:     VERSION,
+		KeepAlive:   4 * time.Minute,
+		Timeout:     1 * time.Minute,
+		PingFreq:    15 * time.Minute,
+		QuitMessage: "",
+	}
+	irc.setupCallbacks()
+	return irc
+}
diff --git a/vendor/github.com/thoj/go-ircevent/irc_callback.go b/vendor/github.com/thoj/go-ircevent/irc_callback.go
new file mode 100644
index 00000000..109cbb1f
--- /dev/null
+++ b/vendor/github.com/thoj/go-ircevent/irc_callback.go
@@ -0,0 +1,221 @@
+package irc
+
+import (
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Register a callback to a connection and event code. A callback is a function
+// which takes only an Event pointer as parameter. Valid event codes are all
+// IRC/CTCP commands and error/response codes. This function returns the ID of
+// the registered callback for later management.
+func (irc *Connection) AddCallback(eventcode string, callback func(*Event)) int {
+	eventcode = strings.ToUpper(eventcode)
+	id := 0
+	if _, ok := irc.events[eventcode]; !ok {
+		irc.events[eventcode] = make(map[int]func(*Event))
+		id = 0
+	} else {
+		id = len(irc.events[eventcode])
+	}
+	irc.events[eventcode][id] = callback
+	return id
+}
+
+// Remove callback i (ID) from the given event code. This functions returns
+// true upon success, false if any error occurs.
+func (irc *Connection) RemoveCallback(eventcode string, i int) bool {
+	eventcode = strings.ToUpper(eventcode)
+
+	if event, ok := irc.events[eventcode]; ok {
+		if _, ok := event[i]; ok {
+			delete(irc.events[eventcode], i)
+			return true
+		}
+		irc.Log.Printf("Event found, but no callback found at id %s\n", i)
+		return false
+	}
+
+	irc.Log.Println("Event not found")
+	return false
+}
+
+// Remove all callbacks from a given event code. It returns true
+// if given event code is found and cleared.
+func (irc *Connection) ClearCallback(eventcode string) bool {
+	eventcode = strings.ToUpper(eventcode)
+
+	if _, ok := irc.events[eventcode]; ok {
+		irc.events[eventcode] = make(map[int]func(*Event))
+		return true
+	}
+
+	irc.Log.Println("Event not found")
+	return false
+}
+
+// Replace callback i (ID) associated with a given event code with a new callback function.
+func (irc *Connection) ReplaceCallback(eventcode string, i int, callback func(*Event)) {
+	eventcode = strings.ToUpper(eventcode)
+
+	if event, ok := irc.events[eventcode]; ok {
+		if _, ok := event[i]; ok {
+			event[i] = callback
+			return
+		}
+		irc.Log.Printf("Event found, but no callback found at id %s\n", i)
+	}
+	irc.Log.Printf("Event not found. Use AddCallBack\n")
+}
+
+// Execute all callbacks associated with a given event.
+func (irc *Connection) RunCallbacks(event *Event) {
+	msg := event.Message()
+	if event.Code == "PRIVMSG" && len(msg) > 2 && msg[0] == '\x01' {
+		event.Code = "CTCP" //Unknown CTCP
+
+		if i := strings.LastIndex(msg, "\x01"); i > 0 {
+			msg = msg[1:i]
+		} else {
+			irc.Log.Printf("Invalid CTCP Message: %s\n", strconv.Quote(msg))
+			return
+		}
+
+		if msg == "VERSION" {
+			event.Code = "CTCP_VERSION"
+
+		} else if msg == "TIME" {
+			event.Code = "CTCP_TIME"
+
+		} else if strings.HasPrefix(msg, "PING") {
+			event.Code = "CTCP_PING"
+
+		} else if msg == "USERINFO" {
+			event.Code = "CTCP_USERINFO"
+
+		} else if msg == "CLIENTINFO" {
+			event.Code = "CTCP_CLIENTINFO"
+
+		} else if strings.HasPrefix(msg, "ACTION") {
+			event.Code = "CTCP_ACTION"
+			if len(msg) > 6 {
+				msg = msg[7:]
+			} else {
+				msg = ""
+			}
+		}
+
+		event.Arguments[len(event.Arguments)-1] = msg
+	}
+
+	if callbacks, ok := irc.events[event.Code]; ok {
+		if irc.VerboseCallbackHandler {
+			irc.Log.Printf("%v (%v) >> %#v\n", event.Code, len(callbacks), event)
+		}
+
+		for _, callback := range callbacks {
+			callback(event)
+		}
+	} else if irc.VerboseCallbackHandler {
+		irc.Log.Printf("%v (0) >> %#v\n", event.Code, event)
+	}
+
+	if callbacks, ok := irc.events["*"]; ok {
+		if irc.VerboseCallbackHandler {
+			irc.Log.Printf("%v (0) >> %#v\n", event.Code, event)
+		}
+
+		for _, callback := range callbacks {
+			callback(event)
+		}
+	}
+}
+
+// Set up some initial callbacks to handle the IRC/CTCP protocol.
+func (irc *Connection) setupCallbacks() {
+	irc.events = make(map[string]map[int]func(*Event))
+
+	//Handle error events. This has to be called in a new thred to allow
+	//readLoop to exit
+	irc.AddCallback("ERROR", func(e *Event) { go irc.Disconnect() })
+
+	//Handle ping events
+	irc.AddCallback("PING", func(e *Event) { irc.SendRaw("PONG :" + e.Message()) })
+
+	//Version handler
+	irc.AddCallback("CTCP_VERSION", func(e *Event) {
+		irc.SendRawf("NOTICE %s :\x01VERSION %s\x01", e.Nick, irc.Version)
+	})
+
+	irc.AddCallback("CTCP_USERINFO", func(e *Event) {
+		irc.SendRawf("NOTICE %s :\x01USERINFO %s\x01", e.Nick, irc.user)
+	})
+
+	irc.AddCallback("CTCP_CLIENTINFO", func(e *Event) {
+		irc.SendRawf("NOTICE %s :\x01CLIENTINFO PING VERSION TIME USERINFO CLIENTINFO\x01", e.Nick)
+	})
+
+	irc.AddCallback("CTCP_TIME", func(e *Event) {
+		ltime := time.Now()
+		irc.SendRawf("NOTICE %s :\x01TIME %s\x01", e.Nick, ltime.String())
+	})
+
+	irc.AddCallback("CTCP_PING", func(e *Event) { irc.SendRawf("NOTICE %s :\x01%s\x01", e.Nick, e.Message()) })
+
+	// 437: ERR_UNAVAILRESOURCE "<nick/channel> :Nick/channel is temporarily unavailable"
+	// Add a _ to current nick. If irc.nickcurrent is empty this cannot
+	// work. It has to be set somewhere first in case the nick is already
+	// taken or unavailable from the beginning.
+	irc.AddCallback("437", func(e *Event) {
+		// If irc.nickcurrent hasn't been set yet, set to irc.nick
+		if irc.nickcurrent == "" {
+			irc.nickcurrent = irc.nick
+		}
+
+		if len(irc.nickcurrent) > 8 {
+			irc.nickcurrent = "_" + irc.nickcurrent
+		} else {
+			irc.nickcurrent = irc.nickcurrent + "_"
+		}
+		irc.SendRawf("NICK %s", irc.nickcurrent)
+	})
+
+	// 433: ERR_NICKNAMEINUSE "<nick> :Nickname is already in use"
+	// Add a _ to current nick.
+	irc.AddCallback("433", func(e *Event) {
+		// If irc.nickcurrent hasn't been set yet, set to irc.nick
+		if irc.nickcurrent == "" {
+			irc.nickcurrent = irc.nick
+		}
+
+		if len(irc.nickcurrent) > 8 {
+			irc.nickcurrent = "_" + irc.nickcurrent
+		} else {
+			irc.nickcurrent = irc.nickcurrent + "_"
+		}
+		irc.SendRawf("NICK %s", irc.nickcurrent)
+	})
+
+	irc.AddCallback("PONG", func(e *Event) {
+		ns, _ := strconv.ParseInt(e.Message(), 10, 64)
+		delta := time.Duration(time.Now().UnixNano() - ns)
+		if irc.Debug {
+			irc.Log.Printf("Lag: %vs\n", delta)
+		}
+	})
+
+	// NICK Define a nickname.
+	// Set irc.nickcurrent to the new nick actually used in this connection.
+	irc.AddCallback("NICK", func(e *Event) {
+		if e.Nick == irc.nick {
+			irc.nickcurrent = e.Message()
+		}
+	})
+
+	// 1: RPL_WELCOME "Welcome to the Internet Relay Network <nick>!<user>@<host>"
+	// Set irc.nickcurrent to the actually used nick in this connection.
+	irc.AddCallback("001", func(e *Event) {
+		irc.nickcurrent = e.Arguments[0]
+	})
+}
diff --git a/vendor/github.com/thoj/go-ircevent/irc_struct.go b/vendor/github.com/thoj/go-ircevent/irc_struct.go
new file mode 100644
index 00000000..3e4a438f
--- /dev/null
+++ b/vendor/github.com/thoj/go-ircevent/irc_struct.go
@@ -0,0 +1,68 @@
+// Copyright 2009 Thomas Jager <mail@jager.no>  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package irc
+
+import (
+	"crypto/tls"
+	"log"
+	"net"
+	"sync"
+	"time"
+)
+
+type Connection struct {
+	sync.WaitGroup
+	Debug     bool
+	Error     chan error
+	Password  string
+	UseTLS    bool
+	TLSConfig *tls.Config
+	Version   string
+	Timeout   time.Duration
+	PingFreq  time.Duration
+	KeepAlive time.Duration
+	Server    string
+
+	socket net.Conn
+	pwrite chan string
+	end    chan struct{}
+
+	nick        string //The nickname we want.
+	nickcurrent string //The nickname we currently have.
+	user        string
+	registered  bool
+	events      map[string]map[int]func(*Event)
+
+	QuitMessage string
+	lastMessage time.Time
+
+	VerboseCallbackHandler bool
+	Log                    *log.Logger
+
+	stopped bool
+	quit    bool
+}
+
+// A struct to represent an event.
+type Event struct {
+	Code       string
+	Raw        string
+	Nick       string //<nick>
+	Host       string //<nick>!<usr>@<host>
+	Source     string //<host>
+	User       string //<usr>
+	Arguments  []string
+	Connection *Connection
+}
+
+// Retrieve the last message from Event arguments.
+// This function  leaves the arguments untouched and
+// returns an empty string if there are none.
+func (e *Event) Message() string {
+	if len(e.Arguments) == 0 {
+		return ""
+	}
+	return e.Arguments[len(e.Arguments)-1]
+}
diff --git a/vendor/github.com/thoj/go-ircevent/irc_test_fuzz.go b/vendor/github.com/thoj/go-ircevent/irc_test_fuzz.go
new file mode 100644
index 00000000..82202e1c
--- /dev/null
+++ b/vendor/github.com/thoj/go-ircevent/irc_test_fuzz.go
@@ -0,0 +1,14 @@
+// +build gofuzz
+
+package irc
+
+func Fuzz(data []byte) int {
+	b := bytes.NewBuffer(data)
+	event, err := parseToEvent(b.String())
+	if err == nil {
+		irc := IRC("go-eventirc", "go-eventirc")
+		irc.RunCallbacks(event)
+		return 1
+	}
+	return 0
+}