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|
package chat
import (
"errors"
)
type Room struct {
Messages chan Message
Buddies map[string]*Buddy
}
func NewRoom() (r *Room) {
r = new(Room)
r.Messages = make(chan Message)
r.Buddies = make(map[string]*Buddy)
go r.Broadcast()
return
}
func (r *Room) Leave(nick string) {
if _, ok := r.Buddies[nick]; !ok {
return
}
delete(r.Buddies, nick)
if len(r.Buddies) == 0 {
close(r.Messages)
} else {
r.Messages <- Message{
Type: MsgLeave,
User: nick,
}
}
}
func (r *Room) Broadcast() {
for m := range r.Messages {
for _, buddy := range r.Buddies {
buddy.Push(m)
}
}
}
func (r *Room) ListBuddies() (buddies []string) {
for nick := range r.Buddies {
buddies = append(buddies, nick)
}
return
}
var (
rooms map[string]*Room
perroom int
)
func InitRooms(room_limit int) {
rooms = make(map[string]*Room)
perroom = room_limit
}
func Join(room, nick string) (*Buddy, *Room, error) {
r, ok := rooms[room]
if !ok {
r = NewRoom()
rooms[room] = r
}
if _, there := r.Buddies[nick]; there {
return nil, nil, errors.New("Nickname is already in use")
}
if len(r.Buddies) >= perroom {
return nil, nil, errors.New("Room is full")
}
r.Messages <- Message{
Type: MsgJoin,
User: nick,
}
b := NewBuddy(nick, r)
r.Buddies[nick] = b
return b, r, nil
}
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