From cf7a05f80f68b5b1c8bcc0089679dd497cec2506 Mon Sep 17 00:00:00 2001
From: =Corey Hulen <corey@hulen.com>
Date: Sun, 14 Jun 2015 23:53:32 -0800
Subject: first commit

---
 api/web_conn.go | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 api/web_conn.go

(limited to 'api/web_conn.go')

diff --git a/api/web_conn.go b/api/web_conn.go
new file mode 100644
index 000000000..751f6f407
--- /dev/null
+++ b/api/web_conn.go
@@ -0,0 +1,132 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package api
+
+import (
+	l4g "code.google.com/p/log4go"
+	"github.com/gorilla/websocket"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/store"
+	"time"
+)
+
+const (
+	WRITE_WAIT  = 10 * time.Second
+	PONG_WAIT   = 60 * time.Second
+	PING_PERIOD = (PONG_WAIT * 9) / 10
+	MAX_SIZE    = 512
+	REDIS_WAIT  = 60 * time.Second
+)
+
+type WebConn struct {
+	WebSocket          *websocket.Conn
+	Send               chan *model.Message
+	TeamId             string
+	UserId             string
+	ChannelAccessCache map[string]bool
+}
+
+func NewWebConn(ws *websocket.Conn, teamId string, userId string, sessionId string) *WebConn {
+	go func() {
+		achan := Srv.Store.User().UpdateUserAndSessionActivity(userId, sessionId, model.GetMillis())
+		pchan := Srv.Store.User().UpdateLastPingAt(userId, model.GetMillis())
+
+		if result := <-achan; result.Err != nil {
+			l4g.Error("Failed to update LastActivityAt for user_id=%v and session_id=%v, err=%v", userId, sessionId, result.Err)
+		}
+
+		if result := <-pchan; result.Err != nil {
+			l4g.Error("Failed to updated LastPingAt for user_id=%v, err=%v", userId, result.Err)
+		}
+	}()
+
+	return &WebConn{Send: make(chan *model.Message, 64), WebSocket: ws, UserId: userId, TeamId: teamId, ChannelAccessCache: make(map[string]bool)}
+}
+
+func (c *WebConn) readPump() {
+	defer func() {
+		hub.Unregister(c)
+		c.WebSocket.Close()
+	}()
+	c.WebSocket.SetReadLimit(MAX_SIZE)
+	c.WebSocket.SetReadDeadline(time.Now().Add(PONG_WAIT))
+	c.WebSocket.SetPongHandler(func(string) error {
+		c.WebSocket.SetReadDeadline(time.Now().Add(PONG_WAIT))
+
+		go func() {
+			if result := <-Srv.Store.User().UpdateLastPingAt(c.UserId, model.GetMillis()); result.Err != nil {
+				l4g.Error("Failed to updated LastPingAt for user_id=%v, err=%v", c.UserId, result.Err)
+			}
+		}()
+
+		return nil
+	})
+
+	for {
+		var msg model.Message
+		if err := c.WebSocket.ReadJSON(&msg); err != nil {
+			return
+		} else {
+			msg.TeamId = c.TeamId
+			msg.UserId = c.UserId
+			store.PublishAndForget(&msg)
+		}
+	}
+}
+
+func (c *WebConn) writePump() {
+	ticker := time.NewTicker(PING_PERIOD)
+
+	defer func() {
+		ticker.Stop()
+		c.WebSocket.Close()
+	}()
+
+	for {
+		select {
+		case msg, ok := <-c.Send:
+			if !ok {
+				c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
+				c.WebSocket.WriteMessage(websocket.CloseMessage, []byte{})
+				return
+			}
+
+			if len(msg.ChannelId) > 0 {
+				allowed, ok := c.ChannelAccessCache[msg.ChannelId]
+				if !ok {
+					allowed = hasPermissionsToChannel(Srv.Store.Channel().CheckPermissionsTo(c.TeamId, msg.ChannelId, c.UserId))
+					c.ChannelAccessCache[msg.ChannelId] = allowed
+				}
+
+				if allowed {
+					c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
+					if err := c.WebSocket.WriteJSON(msg); err != nil {
+						return
+					}
+				}
+			} else {
+				c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
+				if err := c.WebSocket.WriteJSON(msg); err != nil {
+					return
+				}
+			}
+
+		case <-ticker.C:
+			c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
+			if err := c.WebSocket.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
+				return
+			}
+		}
+	}
+}
+
+func hasPermissionsToChannel(sc store.StoreChannel) bool {
+	if cresult := <-sc; cresult.Err != nil {
+		return false
+	} else if cresult.Data.(int64) != 1 {
+		return false
+	}
+
+	return true
+}
-- 
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