Add worker callbacks to account UI

ui/account.go

@@ -11,11 +11,12 @@ import (
 )
 
 type AccountTab struct {
-	Config  *config.AccountConfig
-	Worker  worker.Worker
-	Parent  *UIState
-	logger  *log.Logger
-	counter int
+	Config    *config.AccountConfig
+	Worker    worker.Worker
+	Parent    *UIState
+	logger    *log.Logger
+	counter   int
+	callbacks map[types.WorkerMessage]func(msg types.WorkerMessage)
 }
 
 func NewAccountTab(conf *config.AccountConfig,
@@ -26,13 +27,21 @@ func NewAccountTab(conf *config.AccountConfig,
 		return nil, err
 	}
 	go work.Run()
-	work.PostAction(types.Configure{Config: conf})
-	work.PostAction(types.Connect{})
-	return &AccountTab{
-		Config: conf,
-		Worker: work,
-		logger: logger,
-	}, nil
+	acc := &AccountTab{
+		Config:    conf,
+		Worker:    work,
+		logger:    logger,
+		callbacks: make(map[types.WorkerMessage]func(msg types.WorkerMessage)),
+	}
+	acc.postAction(types.Configure{Config: conf}, nil)
+	acc.postAction(types.Connect{}, func(msg types.WorkerMessage) {
+		if _, ok := msg.(types.Ack); ok {
+			acc.logger.Println("Connected.")
+		} else {
+			acc.logger.Println("Connection failed.")
+		}
+	})
+	return acc, nil
 }
 
 func (acc *AccountTab) Name() string {
@@ -62,13 +71,21 @@ func (acc *AccountTab) GetChannel() chan types.WorkerMessage {
 	return acc.Worker.GetMessages()
 }
 
-func (acc *AccountTab) postAction(msg types.WorkerMessage) {
+func (acc *AccountTab) postAction(msg types.WorkerMessage,
+	cb func(msg types.WorkerMessage)) {
+
 	acc.logger.Printf("-> %T\n", msg)
 	acc.Worker.PostAction(msg)
+	if cb != nil {
+		acc.callbacks[msg] = cb
+	}
 }
 
 func (acc *AccountTab) HandleMessage(msg types.WorkerMessage) {
 	acc.logger.Printf("<- %T\n", msg)
+	if cb, ok := acc.callbacks[msg.InResponseTo()]; ok {
+		cb(msg)
+	}
 	switch msg.(type) {
 	case types.Ack:
 		// no-op
@@ -77,10 +94,10 @@ func (acc *AccountTab) HandleMessage(msg types.WorkerMessage) {
 		acc.logger.Println("Approving certificate")
 		acc.postAction(types.Ack{
 			Message: types.RespondTo(msg),
-		})
+		}, nil)
 	default:
 		acc.postAction(types.Unsupported{
 			Message: types.RespondTo(msg),
-		})
+		}, nil)
 	}
 }