fix: resolve nil pubsub preventing live game updates

v.PubSub() was captured at startup before v.Start() initialized NATS,
so both stores held nil and notify() silently no-oped. Replace the
PubSub interface with a callback that evaluates v.PubSub() lazily at
call time.

game/store.go

@@ -6,10 +6,6 @@ import (
 	"sync"
 )
 
-type PubSub interface {
-	Publish(subject string, data []byte) error
-}
-
 type PlayerSession struct {
 	Player *Player
 }
@@ -26,7 +22,7 @@ type GameStore struct {
 	games     map[string]*GameInstance
 	gamesMu   sync.RWMutex
 	persister  Persister
-	pubsub    PubSub
+	notifyFunc func(gameID string)
 }
 
 func NewGameStore() *GameStore {
@@ -39,14 +35,14 @@ func (gs *GameStore) SetPersister(p Persister) {
 	gs.persister = p
 }
 
-func (gs *GameStore) SetPubSub(ps PubSub) {
-	gs.pubsub = ps
+func (gs *GameStore) SetNotifyFunc(f func(gameID string)) {
+	gs.notifyFunc = f
 }
 
 func (gs *GameStore) makeNotify(gameID string) func() {
 	return func() {
-		if gs.pubsub != nil {
-			gs.pubsub.Publish("game."+gameID, nil)
+		if gs.notifyFunc != nil {
+			gs.notifyFunc(gameID)
 		}
 	}
 }

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/joho/godotenv v1.5.1
 	github.com/pressly/goose/v3 v3.26.0
-	github.com/ryanhamamura/via v0.19.0
+	github.com/ryanhamamura/via v0.23.0
 	golang.org/x/crypto v0.47.0
 	modernc.org/sqlite v1.44.0
 )

go.sum

@@ -78,8 +78,10 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qq
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
 github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY=
 github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ=
-github.com/ryanhamamura/via v0.19.0 h1:mNQLOZAkforeiSVaoIUX5Mc1kDYvNKDhL33jV/0sArM=
-github.com/ryanhamamura/via v0.19.0/go.mod h1:rpJewNVG6tgginZN7Be3qqRuol70+v1sFCKD4UjHsQo=
+github.com/ryanhamamura/via v0.21.2 h1:osR6peY/mZSl9SNPeEv6IvzGU0akkQfQzQJgA74+7mk=
+github.com/ryanhamamura/via v0.21.2/go.mod h1:rpJewNVG6tgginZN7Be3qqRuol70+v1sFCKD4UjHsQo=
+github.com/ryanhamamura/via v0.23.0 h1:0e7nytisazcWq7uxs6T27GM3FwzosCMenkxJd+78Lko=
+github.com/ryanhamamura/via v0.23.0/go.mod h1:rpJewNVG6tgginZN7Be3qqRuol70+v1sFCKD4UjHsQo=
 github.com/sethvargo/go-retry v0.3.0 h1:EEt31A35QhrcRZtrYFDTBg91cqZVnFL2navjDrah2SE=
 github.com/sethvargo/go-retry v0.3.0/go.mod h1:mNX17F0C/HguQMyMyJxcnU471gOZGxCLyYaFyAZraas=
 github.com/starfederation/datastar-go v1.0.3 h1:DnzgsJ6tDHDM6y5Nxsk0AGW/m8SyKch2vQg3P1xGTcU=

main.go

@@ -76,15 +76,17 @@ func main() {
 		ServerAddress:       ":" + port(),
 		SessionManager:      sessionManager,
 		Plugins:             []via.Plugin{DaisyUIPlugin},
-		ContextSuspendAfter: 5 * time.Minute,
-		ContextTTL:          30 * time.Minute,
 	})
 
 	subFS, _ := fs.Sub(assets, "assets")
 	v.StaticFS("/assets/", subFS)
 
-	store.SetPubSub(v.PubSub())
-	snakeStore.SetPubSub(v.PubSub())
+	store.SetNotifyFunc(func(gameID string) {
+		v.PubSub().Publish("game."+gameID, nil)
+	})
+	snakeStore.SetNotifyFunc(func(gameID string) {
+		v.PubSub().Publish("snake."+gameID, nil)
+	})
 
 	// Home page - tabbed lobby
 	v.Page("/", func(c *via.Context) {

snake/store.go

@@ -6,10 +6,6 @@ import (
 	"sync"
 )
 
-type PubSub interface {
-	Publish(subject string, data []byte) error
-}
-
 type Persister interface {
 	SaveSnakeGame(sg *SnakeGame) error
 	LoadSnakeGame(id string) (*SnakeGame, error)
@@ -22,7 +18,7 @@ type SnakeStore struct {
 	games     map[string]*SnakeGameInstance
 	gamesMu   sync.RWMutex
 	persister  Persister
-	pubsub    PubSub
+	notifyFunc func(gameID string)
 }
 
 func NewSnakeStore() *SnakeStore {
@@ -35,14 +31,14 @@ func (ss *SnakeStore) SetPersister(p Persister) {
 	ss.persister = p
 }
 
-func (ss *SnakeStore) SetPubSub(ps PubSub) {
-	ss.pubsub = ps
+func (ss *SnakeStore) SetNotifyFunc(f func(gameID string)) {
+	ss.notifyFunc = f
 }
 
 func (ss *SnakeStore) makeNotify(gameID string) func() {
 	return func() {
-		if ss.pubsub != nil {
-			ss.pubsub.Publish("snake."+gameID, nil)
+		if ss.notifyFunc != nil {
+			ss.notifyFunc(gameID)
 		}
 	}
 }