1 files changed, 92 insertions, 0 deletions
diff --git a/go/game/playerControl.go b/go/game/playerControl.go
new file mode 100644
index 00000000..e62d91b3
--- /dev/null
+++ b/go/game/playerControl.go
@@ -0,0 +1,92 @@
+package game
+
+type PlayerNotificationType int
+
+const (
+	DeclaredActionNotification = iota
+	ResolvedActionNotification
+	PriorityNotification
+	UpkeepPrompt
+	BuyPrompt
+	HandCardSelectionPrompt
+)
+
+func (n PlayerNotification) IsPriorityNotification() bool {
+	return n.Notification == PriorityNotification
+}
+
+type PlayerNotification struct {
+	Notification PlayerNotificationType
+	Context      interface{}
+	Error        error
+}
+
+func NewPriorityNotification() PlayerNotification {
+	return PlayerNotification{PriorityNotification, nil, nil}
+}
+
+func NewDeclaredActionNotification(a Action, err error) PlayerNotification {
+	return PlayerNotification{DeclaredActionNotification, a, err}
+}
+
+func NewResolvedActionNotification(a Action, err error) PlayerNotification {
+	return PlayerNotification{ResolvedActionNotification, a, err}
+}
+
+func NewUpkeepPrompt(u *Unit) PlayerNotification {
+	return PlayerNotification{ResolvedActionNotification, u, nil}
+}
+
+func NewBuyPrompt() PlayerNotification {
+	return PlayerNotification{BuyPrompt, nil, nil}
+}
+
+func NewHandCardSelectionPrompt(min, max int) PlayerNotification {
+	return PlayerNotification{HandCardSelectionPrompt, []int{min, max}, nil}
+}
+
+type PlayerControl interface {
+	RecvAction() Action
+	SendNotification(PlayerNotification)
+}
+
+type DummyPlayerControl struct{ P *Player }
+
+func (c *DummyPlayerControl) RecvAction() Action                { return NewPassPriority(c.P) }
+func (*DummyPlayerControl) SendNotification(PlayerNotification) {}
+
+type ChanPlayerControl struct {
+	Actions       chan Action
+	Notifications chan PlayerNotification
+}
+
+func (c *ChanPlayerControl) SendAction(a Action)                   { c.Actions <- a }
+func (c *ChanPlayerControl) RecvAction() Action                    { return <-c.Actions }
+func (c *ChanPlayerControl) SendNotification(n PlayerNotification) { c.Notifications <- n }
+func (c *ChanPlayerControl) RecvNotification() *PlayerNotification {
+	select {
+	case n := <-c.Notifications:
+		return &n
+	default:
+		return nil
+	}
+}
+
+func NewChanPlayerControl() *ChanPlayerControl {
+	a := make(chan Action)
+	n := make(chan PlayerNotification)
+	return &ChanPlayerControl{a, n}
+}
+
+func prompt(ctrl PlayerControl, notification PlayerNotification) Action {
+	ctrl.SendNotification(NewPriorityNotification())
+	return ctrl.RecvAction()
+}
+
+func promptBuy(ctrl PlayerControl) Action {
+	return prompt(ctrl, NewBuyPrompt())
+}
+
+func promptAction(ctrl PlayerControl) Action {
+	return prompt(ctrl, NewPriorityNotification())
+}