Add transfer logging output (#77)

Co-authored-by: Dane Everitt <dane@daneeveritt.com>

router/websocket/listeners.go

@@ -45,6 +45,8 @@ var e = []string{
 	server.InstallCompletedEvent,
 	server.DaemonMessageEvent,
 	server.BackupCompletedEvent,
+	server.TransferLogsEvent,
+	server.TransferStatusEvent,
 }
 
 // Listens for different events happening on a server and sends them along

router/websocket/websocket.go

@@ -28,6 +28,7 @@ const (
 	PermissionSendPowerRestart = "control.restart"
 	PermissionReceiveErrors    = "admin.websocket.errors"
 	PermissionReceiveInstall   = "admin.websocket.install"
+	PermissionReceiveTransfer  = "admin.websocket.transfer"
 	PermissionReceiveBackups   = "backup.read"
 )
 
@@ -149,6 +150,13 @@ func (h *Handler) SendJson(v *Message) error {
 				return nil
 			}
 		}
+
+		// If we are sending transfer output, only send it to the user if they have the required permissions.
+		if v.Event == server.TransferLogsEvent {
+			if !j.HasPermission(PermissionReceiveTransfer) {
+				return nil
+			}
+		}
 	}
 
 	if err := h.unsafeSendJson(v); err != nil {
@@ -320,13 +328,15 @@ func (h *Handler) HandleInbound(m Message) error {
 			// Only send the current disk usage if the server is offline, if docker container is running,
 			// Environment#EnableResourcePolling() will send this data to all clients.
 			if state == environment.ProcessOfflineState {
-				_ = h.server.Filesystem().HasSpaceAvailable(false)
+				if !h.server.IsInstalling() && !h.server.IsTransferring() {
+					_ = h.server.Filesystem().HasSpaceAvailable(false)
 
-				b, _ := json.Marshal(h.server.Proc())
-				h.SendJson(&Message{
-					Event: server.StatsEvent,
-					Args:  []string{string(b)},
-				})
+					b, _ := json.Marshal(h.server.Proc())
+					h.SendJson(&Message{
+						Event: server.StatsEvent,
+						Args:  []string{string(b)},
+					})
+				}
 			}
 
 			return nil