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room.go
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room.go
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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"fmt"
"log"
"regexp"
"sort"
"strings"
)
var (
RE_ROOM = regexp.MustCompile("^#[^\x00\x07\x0a\x0d ,:/]{1,200}$")
)
// Sanitize room's name. It can consist of 1 to 50 ASCII symbols
// with some exclusions. All room names will have "#" prefix.
func RoomNameValid(name string) bool {
return RE_ROOM.MatchString(name)
}
type Room struct {
Verbose bool
name string
topic string
key string
members map[*Client]bool
hostname string
log_sink chan<- LogEvent
state_sink chan<- StateEvent
}
func NewRoom(hostname, name string, log_sink chan<- LogEvent, state_sink chan<- StateEvent) *Room {
room := Room{name: name}
room.members = make(map[*Client]bool)
room.topic = ""
room.key = ""
room.hostname = hostname
room.log_sink = log_sink
room.state_sink = state_sink
return &room
}
func (room *Room) SendTopic(client *Client) {
if room.topic == "" {
client.ReplyNicknamed("331", room.name, "No topic is set")
} else {
client.ReplyNicknamed("332", room.name, room.topic)
}
}
// Send message to all room's subscribers, possibly excluding someone
func (room *Room) Broadcast(msg string, client_to_ignore ...*Client) {
for member := range room.members {
if (len(client_to_ignore) > 0) && member == client_to_ignore[0] {
continue
}
member.Msg(msg)
}
}
func (room *Room) StateSave() {
room.state_sink <- StateEvent{room.name, room.topic, room.key}
}
func (room *Room) Processor(events <-chan ClientEvent) {
var client *Client
for event := range events {
client = event.client
switch event.event_type {
case EVENT_NEW:
room.members[client] = true
if room.Verbose {
log.Println(client, "joined", room.name)
}
room.SendTopic(client)
room.Broadcast(fmt.Sprintf(":%s JOIN %s", client, room.name))
room.log_sink <- LogEvent{room.name, client.nickname, "joined", true}
nicknames := []string{}
for member := range room.members {
nicknames = append(nicknames, member.nickname)
}
sort.Strings(nicknames)
client.ReplyNicknamed("353", "=", room.name, strings.Join(nicknames, " "))
client.ReplyNicknamed("366", room.name, "End of NAMES list")
case EVENT_DEL:
if _, subscribed := room.members[client]; !subscribed {
client.ReplyNicknamed("442", room.name, "You are not on that channel")
continue
}
delete(room.members, client)
msg := fmt.Sprintf(":%s PART %s :%s", client, room.name, client.nickname)
go room.Broadcast(msg)
room.log_sink <- LogEvent{room.name, client.nickname, "left", true}
case EVENT_TOPIC:
if _, subscribed := room.members[client]; !subscribed {
client.ReplyParts("442", room.name, "You are not on that channel")
continue
}
if event.text == "" {
go room.SendTopic(client)
continue
}
room.topic = strings.TrimLeft(event.text, ":")
msg := fmt.Sprintf(":%s TOPIC %s :%s", client, room.name, room.topic)
go room.Broadcast(msg)
room.log_sink <- LogEvent{room.name, client.nickname, "set topic to " + room.topic, true}
room.StateSave()
case EVENT_WHO:
for m := range room.members {
client.ReplyNicknamed("352", room.name, m.username, m.conn.RemoteAddr().String(), room.hostname, m.nickname, "H", "0 "+m.realname)
}
client.ReplyNicknamed("315", room.name, "End of /WHO list")
case EVENT_MODE:
if event.text == "" {
mode := "+"
if room.key != "" {
mode = mode + "k"
}
client.Msg(fmt.Sprintf("324 %s %s %s", client.nickname, room.name, mode))
continue
}
if strings.HasPrefix(event.text, "-k") || strings.HasPrefix(event.text, "+k") {
if _, subscribed := room.members[client]; !subscribed {
client.ReplyParts("442", room.name, "You are not on that channel")
continue
}
} else {
client.ReplyNicknamed("472", event.text, "Unknown MODE flag")
continue
}
var msg string
var msg_log string
if strings.HasPrefix(event.text, "+k") {
cols := strings.Split(event.text, " ")
if len(cols) == 1 {
client.ReplyNotEnoughParameters("MODE")
continue
}
room.key = cols[1]
msg = fmt.Sprintf(":%s MODE %s +k %s", client, room.name, room.key)
msg_log = "set channel key to " + room.key
} else if strings.HasPrefix(event.text, "-k") {
room.key = ""
msg = fmt.Sprintf(":%s MODE %s -k", client, room.name)
msg_log = "removed channel key"
}
go room.Broadcast(msg)
room.log_sink <- LogEvent{room.name, client.nickname, msg_log, true}
room.StateSave()
case EVENT_MSG:
sep := strings.Index(event.text, " ")
room.Broadcast(fmt.Sprintf(":%s %s %s :%s", client, event.text[:sep], room.name, event.text[sep+1:]), client)
room.log_sink <- LogEvent{room.name, client.nickname, event.text[sep+1:], false}
}
}
}