Move WebSocket API to it's own package and add websocket v4 endpoint (#5881)

wsapi/system.go

@@ -0,0 +1,27 @@
+// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package wsapi
+
+import (
+	l4g "github.com/alecthomas/log4go"
+	"github.com/mattermost/platform/app"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/utils"
+)
+
+func InitSystem() {
+	l4g.Debug(utils.T("wsapi.system.init.debug"))
+
+	app.Srv.WebSocketRouter.Handle("ping", ApiWebSocketHandler(ping))
+}
+
+func ping(req *model.WebSocketRequest) (map[string]interface{}, *model.AppError) {
+	data := map[string]interface{}{}
+	data["text"] = "pong"
+	data["version"] = model.CurrentVersion
+	data["server_time"] = model.GetMillis()
+	data["node_id"] = ""
+
+	return data, nil
+}