/
irc.go
214 lines (178 loc) · 4.05 KB
/
irc.go
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package main
import (
"bufio"
"fmt"
"github.com/wsxiaoys/colors"
"net"
"os"
"strings"
"time"
"./redis_handler"
)
type User struct {
name string
user_field string
}
func (u User) register(s *IRCServer) (err error) {
s.user = &u
s.Write <- "NICK " + u.name
s.Write <- "USER " + u.user_field
return nil
}
type Channel struct {
name string
server *IRCServer
in_channel bool
}
func (c Channel) part() (err error) {
c.server.Write <- ("PART" + " " + c.name)
c.in_channel = false
return nil
}
func (c Channel) join() (err error) {
if c.in_channel {
fmt.Println("Already in channel.")
} else {
c.server.Write <- ("JOIN" + " " + c.name)
}
return nil
}
func NewChannel(server *IRCServer, arg_name string) (c *Channel) {
return &Channel{name: arg_name, server: server, in_channel: false}
}
type IRCServerOptions struct {
auto_reconnect bool
}
/* system code */
func handle_cli_args(this_server *IRCServer) {
switch len(os.Args) {
case 2:
this_server.hostname = os.Args[1]
return
case 3:
this_server.hostname = os.Args[1]
this_server.port = os.Args[2]
return
}
fmt.Println("No cli arguments specified.")
}
func check_error(err error) {
if err != nil {
fmt.Println(err)
os.Exit(2)
}
}
/* server code */
type IRCServer struct {
port string
hostname string
tcpaddr *net.TCPAddr
tcpconn net.Conn
Write, Read chan string
Messages chan string
user *User
redis_handler *redis_handler.RedisHandler
}
func NewIRCServer() *IRCServer {
write := make(chan string)
read := make(chan string)
messages := make(chan string)
our_redis := redis_handler.NewRedisHandler("tcp:127.0.0.1:6379", "irc_channel")
return &IRCServer{Read: read, Write: write, Messages: messages, redis_handler: our_redis}
}
func (s *IRCServer) initiate_connection(options ...IRCServerOptions) {
fmt.Println("Connections to: ", s.hostname, "on port", s.port)
conn, err := net.Dial("tcp", s.hostname+":"+s.port)
s.tcpconn = conn
check_error(err)
}
func (s *IRCServer) HandleIOConn() {
//both loop internally
fmt.Println("Handling connection:")
r := bufio.NewReader(s.tcpconn)
w := bufio.NewWriter(s.tcpconn)
go s.handle_input(r)
go s.handle_parsing(w)
go s.handle_output(w)
go s.handle_messages()
time.Sleep(3000 * time.Millisecond)
//user
user := User{name: "test_name", user_field: "Gammy * * *"}
user.register(s)
this_chan := NewChannel(s, "##subreddit")
this_chan.join()
s.handle_terminal_io()
}
func (s *IRCServer) close() {
close(s.Read)
close(s.Write)
os.Exit(0)
}
func (s *IRCServer) find_connection_info() (err error) {
string_ip, err := net.ResolveIPAddr("ip4", s.hostname)
formatted_ip_port := (string_ip.String() + ":" + s.port) //in format 127.0.0.1:6667
fmt.Println("Host has ip: ", string_ip)
s.tcpaddr, err = net.ResolveTCPAddr("tcp4", formatted_ip_port)
return
}
func (s *IRCServer) handle_terminal_io() {
for {
str, ok := <-s.Read
if ok {
fmt.Println(str)
}
}
}
func (s *IRCServer) handle_parsing(w *bufio.Writer) {
}
func (s *IRCServer) handle_input(r *bufio.Reader) {
for {
if str, err := r.ReadString('\n'); err != nil {
check_error(err)
} else {
was_ping := s.check_for_pong(string(str))
//fmt.Println(string(str))
if !was_ping {
s.Messages <- string(str)
s.Read <- string(str)
}
}
}
}
func (s *IRCServer) handle_output(w *bufio.Writer) {
for {
str, ok := <-s.Write
if ok {
colors.Println("@rSending:", str, "@w")
w.WriteString((str + "\r\n"))
w.Flush()
}
}
}
func (s *IRCServer) handle_messages() {
for {
msg, ok := <-s.Messages
if ok {
s.redis_handler.Push(msg)
}
}
}
func (s *IRCServer) check_for_pong(str_arr ...string) (was_pong bool){
found_pong := false
for _, str := range str_arr {
if strings.HasPrefix(str, "PING") {
s.Write <- ("PONG" + str[4:len(str)-2])
colors.Println("@g" + str + "@w")
found_pong = true
break
}
}
return found_pong
}
/* main code */
func main() {
this_IRCServer := NewIRCServer()
handle_cli_args(this_IRCServer)
this_IRCServer.initiate_connection()
this_IRCServer.HandleIOConn()
}