/
gotrigga.go
135 lines (119 loc) · 2.19 KB
/
gotrigga.go
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package gotrigga
import(
"net"
"encoding/json"
"github.com/opesun/trigga/binhelper"
"sync"
"time"
)
type Connection struct {
conn net.Conn
chans map[string]map[int64]chan[]byte
mut sync.RWMutex
}
func (c *Connection) sendOnChans(msg map[string]interface{}) {
c.mut.Lock()
defer c.mut.Unlock()
m, ok := c.chans[msg["r"].(string)]
if !ok {
return
}
for _, v := range m {
v <- []byte(msg["m"].(string))
}
}
func (c *Connection) read() {
for {
msg, err := binhelper.ReadMsg(c.conn)
if err != nil {
panic(err)
}
var v interface{}
err = json.Unmarshal(msg, &v)
if err != nil {
panic(err)
}
c.sendOnChans(v.(map[string]interface{}))
}
}
func (c *Connection) Close() {
c.conn.Close()
}
type Room struct {
name string
c *Connection
}
func (c *Connection) Room(roomName string) *Room {
return &Room{
roomName,
c,
}
}
func (r *Room) Subscribe() error {
cmd := map[string]interface{}{
"r": r.name,
"c": "s",
}
return r.send(cmd)
}
func (r *Room) Unsubscribe() error {
cmd := map[string]interface{}{
"r": r.name,
"c": "u",
}
return r.send(cmd)
}
func (r *Room) Publish(msg string) error {
cmd := map[string]interface{}{
"r": r.name,
"c": "p",
"m": msg,
}
return r.send(cmd)
}
func (r *Room) send(cmd map[string]interface{}) error {
b, err := json.Marshal(cmd)
if err != nil {
return err
}
return binhelper.WriteMsg(r.c.conn, b)
}
func (r *Room) regChan(id int64, c chan[]byte) {
r.c.mut.Lock()
defer r.c.mut.Unlock()
m, ok := r.c.chans[r.name]
if !ok {
m = map[int64]chan[]byte{}
}
m[id] = c
r.c.chans[r.name] = m
}
func (r *Room) unregChan(id int64, c chan[]byte) {
r.c.mut.Lock()
defer r.c.mut.Unlock()
delete(r.c.chans[r.name], id)
if len(r.c.chans[r.name]) == 0 {
delete(r.c.chans, r.name)
}
}
func (r *Room) Read() ([]byte, error) {
id := time.Now().UnixNano()
ch := make(chan[]byte)
r.regChan(id, ch) // I bet it's costly...
defer r.unregChan(id, ch)
msg := <- ch
return msg, nil
}
func Connect(addr string) (*Connection, error) {
conn, err := net.Dial("tcp", addr)
if err != nil {
return nil, err
}
ret := &Connection {
conn,
map[string]map[int64]chan[]byte{},
sync.RWMutex{},
}
go ret.read()
return ret, nil
}