Fixes prometheus gauges

Fix session close. Now PWD gets disconnected from network before
deleting it.

services/client.go

@@ -4,20 +4,8 @@ import (
 	"log"
 
 	"github.com/googollee/go-socket.io"
-	"github.com/prometheus/client_golang/prometheus"
 )
 
-var (
-	clientsGauge = prometheus.NewGauge(prometheus.GaugeOpts{
-		Name: "clients",
-		Help: "Clients",
-	})
-)
-
-func init() {
-	prometheus.MustRegister(clientsGauge)
-}
-
 type ViewPort struct {
 	Rows uint
 	Cols uint
@@ -35,7 +23,6 @@ func (c *Client) ResizeViewPort(cols, rows uint) {
 }
 
 func NewClient(so socketio.Socket, session *Session) *Client {
-	clientsGauge.Inc()
 	so.Join(session.Id)
 
 	c := &Client{so: so, Id: so.Id()}
@@ -67,7 +54,6 @@ func NewClient(so socketio.Socket, session *Session) *Client {
 	})
 
 	so.On("disconnection", func() {
-		clientsGauge.Dec()
 		// Client has disconnected. Remove from session and recheck terminal sizes.
 		for i, cl := range session.clients {
 			if cl.Id == c.Id {
@@ -83,6 +69,7 @@ func NewClient(so socketio.Socket, session *Session) *Client {
 				instance.ResizeTerminal(vp.Cols, vp.Rows)
 			}
 		}
+		setGauges()
 	})
 	return c
 }