forked from mengelbart/moqtransport
/
room.go
105 lines (96 loc) · 2.08 KB
/
room.go
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package chat
import (
"encoding"
"errors"
"fmt"
"log"
"sync"
moqtransport "github.com/danielpfeifer02/priority-moqtransport"
)
type room struct {
id string
participants *chatalog
publishers map[string]*publisher
subscribers map[string]*moqtransport.SendTrack
lock sync.Mutex
closeCh chan struct{}
closeWG sync.WaitGroup
ch chan encoding.BinaryMarshaler
subscribeCh chan *subscriber
}
func newChat(id string) *room {
c := &room{
id: id,
participants: &chatalog{
version: 0,
participants: map[string]struct{}{},
},
publishers: map[string]*publisher{},
subscribers: map[string]*moqtransport.SendTrack{},
lock: sync.Mutex{},
closeCh: make(chan struct{}),
closeWG: sync.WaitGroup{},
ch: make(chan encoding.BinaryMarshaler),
subscribeCh: make(chan *subscriber),
}
go c.broadcast()
return c
}
func (r *room) join(username string, p *moqtransport.Peer) error {
r.lock.Lock()
defer r.lock.Unlock()
if _, ok := r.publishers[username]; ok {
return errors.New("username already taken")
}
t, err := p.Subscribe(fmt.Sprintf("moq-chat/%v/%v", r.id, username))
if err != nil {
return err
}
pub := newPublisher(t)
r.publishers[username] = pub
r.participants.participants[username] = struct{}{}
delta := &delta{
joined: []string{username},
left: []string{},
}
r.ch <- delta
return nil
}
func (r *room) subscribe(name string, t *moqtransport.SendTrack) error {
_, err := t.Write([]byte(r.participants.serialize()))
if err != nil {
return err
}
r.subscribeCh <- &subscriber{
name: name,
track: t,
}
return nil
}
func (r *room) close() {
close(r.closeCh)
r.closeWG.Wait()
}
func (r *room) broadcast() {
r.closeWG.Add(1)
defer r.closeWG.Done()
for {
select {
case msg := <-r.ch:
data, err := msg.MarshalBinary()
if err != nil {
log.Println(err)
}
for _, s := range r.subscribers {
_, err = s.Write(data)
if err != nil {
log.Println(err)
}
}
case s := <-r.subscribeCh:
r.subscribers[s.name] = s.track
case <-r.closeCh:
return
}
}
}