Allow to disable invition requests

README.md

@@ -4,6 +4,8 @@ About cats
 
 Inspired from https://github.com/go-chat-bot/plugins/blob/master/catfacts/catfacts.go
 
+## Build
+
 ```go
 go build
 ```
@@ -15,3 +17,10 @@ export IRC_PASS="passw0rd"
 export IRC_URL="localhost:6667"
 ./ctf2021_ircbot | tee bot.log
 ```
+
+## Commands
+
+```
+cat|meow|etc - show cat fact or gif
+nyastat - show #ctf channel stats
+```

main.go

@@ -8,11 +8,14 @@ import (
 	"net/http"
 	"os"
 	"regexp"
+	"strings"
 	"sync"
 	"time"
 
 	"log"
 
+	"strconv"
+
 	irc "github.com/thoj/go-ircevent"
 )
 
@@ -20,7 +23,7 @@ var channel = "#ctf"
 var sendHi = ""
 
 const (
-	pattern   = "(?i)\\b(cat|gato|miau|meow|garfield|lolcat|кот|кошк)[s|z]{0,1}\\b"
+	pattern   = "(?i)\\b(cat|gato|miau|meow|garfield|lolcat)[s|z]{0,1}\\b"
 	nyastat   = "nyastat"
 	msgPrefix = "I love cats! Here's a fact: %s ^_^"
 	gifPrefix = "Meow! Here's a gif: %s ^_^"
@@ -28,12 +31,13 @@ const (
 
 // environment variables
 const (
-	userEnv  = "IRC_USER"
+	userEnv      = "IRC_USER"
-	nickEnv  = "IRC_NICK"
+	nickEnv      = "IRC_NICK"
-	himsgEnv = "IRC_SEY_HI"
+	himsgEnv     = "IRC_SAY_HI"
-	passEnv  = "IRC_PASS"
+	passEnv      = "IRC_PASS"
-	chanEnv  = "IRC_CHAN"
+	chanEnv      = "IRC_CHAN"
-	urlEnv   = "IRC_URL"
+	urlEnv       = "IRC_URL"
+	invitionsEnv = "IRC_ENABLE_INVITIONS"
 )
 
 type catFact struct {
@@ -48,12 +52,14 @@ var (
 
 type stats struct {
 	userMessages map[string]uint
+	invites      map[string]bool
 	mux          *sync.Mutex
 }
 
 func newStats() *stats {
 	return &stats{
 		userMessages: make(map[string]uint),
+		invites:      make(map[string]bool),
 		mux:          &sync.Mutex{},
 	}
 }
@@ -79,10 +85,10 @@ func (s *stats) online(e *irc.Event) int {
 }
 
 func (s *stats) realStats(e *irc.Event) {
-	e.Connection.Privmsg(channel, "🙀🙀🙀 WoW 🙀🙀🙀 NYAStat 🙀🙀🙀")
+	e.Connection.Privmsg(e.Nick, "🙀🙀🙀 WoW 🙀🙀🙀 NYAStat 🙀🙀🙀")
 	t := "User %s sent %d messages"
 	for u, v := range s.userMessages {
-		e.Connection.Privmsg(channel, fmt.Sprintf(t, u, v))
+		e.Connection.Privmsg(e.Nick, fmt.Sprintf(t, u, v))
 	}
 }
 
@@ -91,6 +97,22 @@ func (s *stats) printStats(e *irc.Event) {
 	s.realStats(e)
 }
 
+func (s *stats) invitionRequest(e *irc.Event) {
+	s.mux.Lock()
+	defer s.mux.Unlock()
+
+	if !isInvitionsEnabled() {
+		return
+	}
+
+	if sended, ok := s.invites[e.Nick]; !ok || !sended {
+		log.Printf("Sending invite request to %s", e.Nick)
+
+		s.invites[e.Nick] = true
+		e.Connection.Privmsg(e.Nick, fmt.Sprintf("Привет, %s! В тиму 0х0 нужны два опытных человека. + в приват @difrex", e.Nick))
+	}
+}
+
 func addCallbacks(irccon *irc.Connection, s *stats) {
 	irccon.AddCallback("001", func(e *irc.Event) {
 		log.Println("Welcome message:", e.Message())
@@ -101,16 +123,19 @@ func addCallbacks(irccon *irc.Connection, s *stats) {
 		// Join to channel
 		e.Connection.Join(channel)
 
+		e.Connection.Action(channel, "=^_^= https://gitea.difrex.ru/CTF2021/irc_bot")
+
 		// Greetings
 		if sendHi != "" {
 			e.Connection.Privmsg(channel, `Hi!`)
 			e.Connection.Privmsg(channel, `I'm a cat facts bot!`)
-			e.Connection.Privmsg(channel, `Try cat /etc/passwd :p`)
 			e.Connection.Privmsg(channel, `Source code and issue tracker: https://gitea.difrex.ru/CTF2021/irc_bot`)
 			e.Connection.Privmsg(channel, `Now with gifs! ^_^`)
 		}
 	})
 
+	irccon.AddCallback("JOIN", s.invitionRequest)
+
 	irccon.AddCallback("PRIVMSG", func(e *irc.Event) {
 		log.Printf("Message from %s received: %s", e.Nick, e.Message())
 		s.addUser(e.Nick)
@@ -138,11 +163,29 @@ func main() {
 	irccon.Loop()
 }
 
+func isHelpCommand(command string, e *irc.Event) bool {
+	if e.Nick != channel && strings.ToLower(command) == "help" {
+		return true
+	}
+	return false
+}
+
+func showHelp(e *irc.Event) {
+	e.Connection.Privmsg(e.Nick, "HELP -- show this help")
+	e.Connection.Privmsg(e.Nick, "cat|meow|etc -- show cat fact or gif")
+	e.Connection.Privmsg(e.Nick, "nyastat -- show #ctf channel stats")
+}
+
 func doCommand(command string, e *irc.Event, s *stats) {
-	// if ok := statCommand(command); ok {
+	if ok := statCommand(command); ok {
-	// 	s.printStats(e)
+		s.printStats(e)
-	// 	return
+		return
-	// }
+	}
+
+	if isHelpCommand(command, e) {
+		showHelp(e)
+		return
+	}
 
 	if ok := checkCommad(command, e.Connection); !ok {
 		return
@@ -152,10 +195,11 @@ func doCommand(command string, e *irc.Event, s *stats) {
 	i := rand.Intn(50)
 	fmt.Println(i)
 	if i > 30 {
-		catGif(e.Connection)
+		catGif(e)
 		return
 	}
-	catFacts(e.Connection)
+
+	catFacts(e)
 }
 
 func statCommand(command string) bool {
@@ -166,18 +210,16 @@ func statCommand(command string) bool {
 }
 
 func checkCommad(command string, con *irc.Connection) bool {
-	if !re.MatchString(command) {
+	return re.MatchString(command)
-		return false
-	}
-	return true
 }
 
-func catGif(con *irc.Connection) (string, error) {
+func catGif(e *irc.Event) (string, error) {
 	res, err := http.Get("http://thecatapi.com/api/images/get?format=src&type=gif")
 	if err != nil {
 		return "", err
 	}
-	con.Privmsg(channel, fmt.Sprintf(gifPrefix, res.Request.URL.String()))
+	log.Println("Send gif")
+	e.Connection.Privmsg(channel, fmt.Sprintf(gifPrefix, res.Request.URL.String()))
 	return fmt.Sprintf(gifPrefix, res.Request.URL.String()), nil
 }
 
@@ -196,8 +238,8 @@ func getJson(url string, v interface{}) error {
 	return json.Unmarshal(body, v)
 }
 
-func catFacts(con *irc.Connection) (string, error) {
+func catFacts(e *irc.Event) (string, error) {
-
+	log.Println("Send fact")
 	data := &catFact{}
 	err := getJson(catFactsURL, data)
 	if err != nil {
@@ -208,10 +250,31 @@ func catFacts(con *irc.Connection) (string, error) {
 		return "", nil
 	}
 
-	con.Privmsg(channel, fmt.Sprintf(msgPrefix, data.Fact))
+	e.Connection.Privmsg(channel, fmt.Sprintf(msgPrefix, data.Fact))
 	return fmt.Sprintf(msgPrefix, data.Fact), nil
 }
 
+func getChanName(e *irc.Event) string {
+	c := channel
+	if _, err := strconv.Atoi(e.Nick); err != nil {
+		c = e.Nick
+	}
+
+	return c
+}
+
+func isInvitionsEnabled() bool {
+	enabled := os.Getenv(invitionsEnv)
+	if strings.ToLower(enabled) == "yes" {
+		return true
+	}
+	return false
+}
+
+func getNick() string {
+	return os.Getenv(nickEnv)
+}
+
 func init() {
 	ch := os.Getenv(chanEnv)
 	if ch != "" {