add skeleton for triggers and triggered actions

1 files changed, 46 insertions, 1 deletions

diff --git a/go/game/state.go b/go/game/state.go
index 49ee0c06..6bb3dbf0 100644
--- a/go/game/state.go
+++ b/go/game/state.go
@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"golang.org/x/exp/slices"
+	"muhq.space/muhqs-game/go/utils"
 )
 
 type State struct {
@@ -24,6 +25,8 @@ type State struct {
 	Rand                 *rand.Rand
 	eotEffects           []effect
 	outstandingEquipment []*Card
+	events               []Event
+	triggers             []Trigger
 }
 
 func NewState() *State {
@@ -96,6 +99,39 @@ func (s *State) Loop() []*Player {
 	return winners
 }
 
+func (s *State) removeTriggers(triggers []Trigger) {
+	for _, t := range triggers {
+		s.triggers = utils.RemoveFromUnorderedSlice(s.triggers, t)
+	}
+}
+
+func (s *State) handleTriggers() {
+	var actions []Action
+	var triggersToRemove []Trigger
+
+	for _, e := range s.events {
+		for _, t := range s.triggers {
+			a, remove := t.trigger(s, e)
+			if a != nil {
+				actions = append(actions, a...)
+			}
+			if remove {
+				triggersToRemove = append(triggersToRemove, t)
+			}
+		}
+	}
+
+	// Reset occured events
+	s.events = nil
+
+	s.removeTriggers(triggersToRemove)
+
+	orderedActions := s.orderTriggeredActions(actions)
+	for _, a := range orderedActions {
+		s.declareAction(a)
+	}
+}
+
 func (s *State) stateBasedActions() {
 	for _, p := range s.Permanents {
 		p.Card().Impl.stateBasedActions(s, p)
@@ -104,6 +140,8 @@ func (s *State) stateBasedActions() {
 			s.destroyPermanent(p)
 		}
 	}
+
+	s.handleTriggers()
 }
 
 func (s *State) IsValidPlay(a *PlayAction) error {
@@ -322,6 +360,11 @@ func (s *State) declareAction(a Action) {
 	s.broadcastNotification(newDeclaredActionNotification(a, err))
 }
 
+func (s *State) orderTriggeredActions(actions []Action) []Action {
+	// TODO: implement ordering
+	return actions
+}
+
 func (s *State) allPassing(skipFirst bool) bool {
 	nPlayers := len(s.Players)
 	i := 0
@@ -600,6 +643,8 @@ func (s *State) endOfTurn() {
 	for _, e := range s.eotEffects {
 		e.end(s)
 	}
+	s.eotEffects = nil
 
-	s.eotEffects = []effect{}
+	s.events = append(s.events, newEotEvent())
+	s.stateBasedActions()
 }