room.go

   1 /*
   2 goircd -- minimalistic simple Internet Relay Chat (IRC) server
   3 Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18 package main
  19
  20 import (
  21         "fmt"
  22         "log"
  23         "regexp"
  24         "sort"
  25         "strings"
  26 )
  27
  28 var (
  29         RERoom = regexp.MustCompile("^#[^\x00\x07\x0a\x0d ,:/]{1,200}$")
  30 )
  31
  32 // Sanitize room's name. It can consist of 1 to 50 ASCII symbols
  33 // with some exclusions. All room names will have "#" prefix.
  34 func RoomNameValid(name string) bool {
  35         return RERoom.MatchString(name)
  36 }
  37
  38 type Room struct {
  39         Verbose   bool
  40         name      string
  41         topic     string
  42         key       string
  43         members   map[*Client]bool
  44         hostname  string
  45         logSink   chan<- LogEvent
  46         stateSink chan<- StateEvent
  47 }
  48
  49 func (r Room) String() string {
  50         return r.name
  51 }
  52
  53 func NewRoom(hostname, name string, logSink chan<- LogEvent, stateSink chan<- StateEvent) *Room {
  54         room := Room{name: name}
  55         room.members = make(map[*Client]bool)
  56         room.topic = ""
  57         room.key = ""
  58         room.hostname = hostname
  59         room.logSink = logSink
  60         room.stateSink = stateSink
  61         return &room
  62 }
  63
  64 func (room *Room) SendTopic(client *Client) {
  65         if room.topic == "" {
  66                 client.ReplyNicknamed("331", room.name, "No topic is set")
  67         } else {
  68                 client.ReplyNicknamed("332", room.name, room.topic)
  69         }
  70 }
  71
  72 // Send message to all room's subscribers, possibly excluding someone
  73 func (room *Room) Broadcast(msg string, clientToIgnore ...*Client) {
  74         for member := range room.members {
  75                 if (len(clientToIgnore) > 0) && member == clientToIgnore[0] {
  76                         continue
  77                 }
  78                 member.Msg(msg)
  79         }
  80 }
  81
  82 func (room *Room) StateSave() {
  83         room.stateSink <- StateEvent{room.name, room.topic, room.key}
  84 }
  85
  86 func (room *Room) Processor(events <-chan ClientEvent) {
  87         var client *Client
  88         for event := range events {
  89                 client = event.client
  90                 switch event.eventType {
  91                 case EventNew:
  92                         room.members[client] = true
  93                         if room.Verbose {
  94                                 log.Println(client, "joined", room.name)
  95                         }
  96                         room.SendTopic(client)
  97                         room.Broadcast(fmt.Sprintf(":%s JOIN %s", client, room.name))
  98                         room.logSink <- LogEvent{room.name, client.nickname, "joined", true}
  99                         nicknames := []string{}
 100                         for member := range room.members {
 101                                 nicknames = append(nicknames, member.nickname)
 102                         }
 103                         sort.Strings(nicknames)
 104                         client.ReplyNicknamed("353", "=", room.name, strings.Join(nicknames, " "))
 105                         client.ReplyNicknamed("366", room.name, "End of NAMES list")
 106                 case EventDel:
 107                         if _, subscribed := room.members[client]; !subscribed {
 108                                 client.ReplyNicknamed("442", room.name, "You are not on that channel")
 109                                 continue
 110                         }
 111                         delete(room.members, client)
 112                         msg := fmt.Sprintf(":%s PART %s :%s", client, room.name, client.nickname)
 113                         room.Broadcast(msg)
 114                         room.logSink <- LogEvent{room.name, client.nickname, "left", true}
 115                 case EventTopic:
 116                         if _, subscribed := room.members[client]; !subscribed {
 117                                 client.ReplyParts("442", room.name, "You are not on that channel")
 118                                 continue
 119                         }
 120                         if event.text == "" {
 121                                 go room.SendTopic(client)
 122                                 continue
 123                         }
 124                         room.topic = strings.TrimLeft(event.text, ":")
 125                         msg := fmt.Sprintf(":%s TOPIC %s :%s", client, room.name, room.topic)
 126                         go room.Broadcast(msg)
 127                         room.logSink <- LogEvent{room.name, client.nickname, "set topic to " + room.topic, true}
 128                         room.StateSave()
 129                 case EventWho:
 130                         for m := range room.members {
 131                                 client.ReplyNicknamed("352", room.name, m.username, m.conn.RemoteAddr().String(), room.hostname, m.nickname, "H", "0 "+m.realname)
 132                         }
 133                         client.ReplyNicknamed("315", room.name, "End of /WHO list")
 134                 case EventMode:
 135                         if event.text == "" {
 136                                 mode := "+"
 137                                 if room.key != "" {
 138                                         mode = mode + "k"
 139                                 }
 140                                 client.Msg(fmt.Sprintf("324 %s %s %s", client.nickname, room.name, mode))
 141                                 continue
 142                         }
 143                         if strings.HasPrefix(event.text, "-k") || strings.HasPrefix(event.text, "+k") {
 144                                 if _, subscribed := room.members[client]; !subscribed {
 145                                         client.ReplyParts("442", room.name, "You are not on that channel")
 146                                         continue
 147                                 }
 148                         } else {
 149                                 client.ReplyNicknamed("472", event.text, "Unknown MODE flag")
 150                                 continue
 151                         }
 152                         var msg string
 153                         var msgLog string
 154                         if strings.HasPrefix(event.text, "+k") {
 155                                 cols := strings.Split(event.text, " ")
 156                                 if len(cols) == 1 {
 157                                         client.ReplyNotEnoughParameters("MODE")
 158                                         continue
 159                                 }
 160                                 room.key = cols[1]
 161                                 msg = fmt.Sprintf(":%s MODE %s +k %s", client, room.name, room.key)
 162                                 msgLog = "set channel key to " + room.key
 163                         } else if strings.HasPrefix(event.text, "-k") {
 164                                 room.key = ""
 165                                 msg = fmt.Sprintf(":%s MODE %s -k", client, room.name)
 166                                 msgLog = "removed channel key"
 167                         }
 168                         go room.Broadcast(msg)
 169                         room.logSink <- LogEvent{room.name, client.nickname, msgLog, true}
 170                         room.StateSave()
 171                 case EventMsg:
 172                         sep := strings.Index(event.text, " ")
 173                         room.Broadcast(fmt.Sprintf(":%s %s %s :%s", client, event.text[:sep], room.name, event.text[sep+1:]), client)
 174                         room.logSink <- LogEvent{room.name, client.nickname, event.text[sep+1:], false}
 175                 }
 176         }
 177 }