/
ws.go
239 lines (195 loc) · 4.42 KB
/
ws.go
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package main
import (
"encoding/json"
"time"
"github.com/bbhmakerlab/openinnovation/debug"
"github.com/bbhmakerlab/openinnovation/store"
"github.com/gorilla/websocket"
)
const (
// Time allowed to write a message to the peer.
writeWait = 10 * time.Second
// Time allowed to read the next pong message from the peer.
pongWait = 10 * time.Second
// Send pings to peer with this period. Must be less than pongWait.
pingPeriod = (pongWait * 9) / 10
// Maximum message size allowed from peer.
maxMessageSize = 512
)
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
// connection is an middleman between the websocket connection and the hub.
type connection struct {
// The websocket connection.
ws *websocket.Conn
// Buffered channel of outbound messages.
send chan []byte
// User ID
userID int64
}
// readPump pumps messages from the websocket connection to the hub.
func (c *connection) readPump() {
defer func() {
h.unregister <- c
c.ws.Close()
}()
c.ws.SetReadLimit(maxMessageSize)
c.ws.SetReadDeadline(time.Now().Add(pongWait))
c.ws.SetPongHandler(func(string) error { c.ws.SetReadDeadline(time.Now().Add(pongWait)); return nil })
for {
_, _, err := c.ws.ReadMessage()
if err != nil {
break
}
// h.process(c, message)
}
}
// write writes a message with the given message type and payload.
func (c *connection) write(mt int, payload []byte) error {
c.ws.SetWriteDeadline(time.Now().Add(writeWait))
return c.ws.WriteMessage(mt, payload)
}
// writePump pumps messages from the hub to the websocket connection.
func (c *connection) writePump() {
ticker := time.NewTicker(pingPeriod)
defer func() {
ticker.Stop()
c.ws.Close()
}()
for {
select {
case message, ok := <-c.send:
if !ok {
c.write(websocket.CloseMessage, []byte{})
return
}
if err := c.write(websocket.TextMessage, message); err != nil {
return
}
case <-ticker.C:
if err := c.write(websocket.PingMessage, []byte{}); err != nil {
return
}
}
}
}
// hub maintains the set of active connections and broadcasts messages to the
// connections.
type hub struct {
// Registered connections.
connections map[int64]*connection
// Register requests from the connections.
register chan *connection
// Unregister requests from connections.
unregister chan *connection
}
var h = hub{
register: make(chan *connection),
unregister: make(chan *connection),
connections: make(map[int64]*connection),
}
func (h *hub) run() {
for {
select {
case c := <-h.register:
h.connections[c.userID] = c
h.notifyRelatedUsers(c.userID, "userConnected", c.userID)
case c := <-h.unregister:
if _, ok := h.connections[c.userID]; ok {
delete(h.connections, c.userID)
close(c.send)
}
h.notifyRelatedUsers(c.userID, "userDisconnected", c.userID)
}
}
}
// func (h *hub) process(c *connection, m []byte) {
// }
type message struct {
Type string `json:"type"`
Data interface{} `json:"data"`
}
func (h *hub) notifyUser(userID, otherUserID int64, typ string, v interface{}) {
m := message{typ, v}
c, ok := h.connections[userID]
if !ok {
return
}
b, err := json.Marshal(m)
if err != nil {
debug.Warn(err)
return
}
c.send <- b
// chatting with yourself so just send the message once
if userID == otherUserID {
return
}
d, ok := h.connections[otherUserID]
if !ok {
return
}
d.send <- b
}
func (h *hub) notifyProject(projectID int64, typ string, v interface{}) {
m := message{typ, v}
ids, err := store.GetMemberIDs(projectID)
if err != nil {
debug.Warn(err)
return
}
b, err := json.Marshal(m)
if err != nil {
debug.Warn(err)
return
}
for _, id := range ids {
c, ok := h.connections[id]
if !ok {
continue
}
c.send <- b
}
}
func (h *hub) notifyFriends(userID int64, typ string, v interface{}) {
m := message{typ, v}
ids, err := store.GetFriendIDs(userID)
if err != nil {
debug.Warn(err)
return
}
b, err := json.Marshal(m)
if err != nil {
debug.Warn(err)
return
}
for _, id := range ids {
c, ok := h.connections[id]
if !ok {
continue
}
c.send <- b
}
}
func (h *hub) notifyRelatedUsers(userID int64, typ string, v interface{}) {
m := message{typ, v}
ids, err := store.GetRelatedUserIDs(userID)
if err != nil {
debug.Warn(err)
return
}
b, err := json.Marshal(m)
if err != nil {
debug.Warn(err)
return
}
for _, id := range ids {
c, ok := h.connections[id]
if !ok {
continue
}
c.send <- b
}
}