Simplify codebase and fix Enter key on home page

- Enter key now triggers createGame action on home page
- Remove redundant setNickname action from home page
- Remove unused code: join channel, Leave(), Stop() methods
- Consolidate ID generation into game.GenerateID()
- Remove unused CreatedAt field from Game struct

game/store.go

@@ -28,7 +28,7 @@ func NewGameStore() *GameStore {
 }
 
 func (gs *GameStore) Create() *GameInstance {
-	id := generateGameID()
+	id := GenerateID(4)
 	gi := NewGameInstance(id)
 	gs.gamesMu.Lock()
 	gs.games[id] = gi
@@ -44,8 +44,8 @@ func (gs *GameStore) Get(id string) (*GameInstance, bool) {
 	return gi, ok
 }
 
-func generateGameID() string {
+func GenerateID(size int) string {
-	b := make([]byte, 4)
+	b := make([]byte, size)
 	rand.Read(b)
 	return hex.EncodeToString(b)
 }
@@ -55,7 +55,6 @@ type GameInstance struct {
 	gameMu    sync.RWMutex
 	players   map[PlayerID]Syncable
 	playersMu sync.RWMutex
-	join      chan *PlayerSession
 	leave     chan PlayerID
 	done      chan struct{}
 	dirty     bool
@@ -65,7 +64,6 @@ func NewGameInstance(id string) *GameInstance {
 	return &GameInstance{
 		game:    NewGame(id),
 		players: make(map[PlayerID]Syncable),
-		join:    make(chan *PlayerSession, 5),
 		leave:   make(chan PlayerID, 5),
 		done:    make(chan struct{}),
 	}
@@ -101,10 +99,6 @@ func (gi *GameInstance) Join(ps *PlayerSession) bool {
 	return true
 }
 
-func (gi *GameInstance) Leave(pid PlayerID) {
-	gi.leave <- pid
-}
-
 func (gi *GameInstance) GetGame() *Game {
 	gi.gameMu.RLock()
 	defer gi.gameMu.RUnlock()
@@ -186,7 +180,3 @@ func (gi *GameInstance) publish() {
 		sync.Sync()
 	}
 }
-
-func (gi *GameInstance) Stop() {
-	close(gi.done)
-}

game/types.go

@@ -1,7 +1,5 @@
 package game
 
-import "time"
-
 type PlayerID string
 
 type Player struct {
@@ -27,7 +25,6 @@ type Game struct {
 	Status       GameStatus
 	Winner       *Player
 	WinningCells [][2]int // Coordinates of winning 4 cells for highlighting
-	CreatedAt    time.Time
 }
 
 func NewGame(id string) *Game {
@@ -36,6 +33,5 @@ func NewGame(id string) *Game {
 		Board:       [6][7]int{},
 		CurrentTurn: 1, // Red goes first
 		Status:      StatusWaitingForPlayer,
-		CreatedAt:   time.Now(),
 	}
 }

go.mod

@@ -2,16 +2,12 @@ module github.com/ryanhamamura/c4
 
 go 1.25.4
 
-require (
+require github.com/ryanhamamura/via v0.2.3
-	github.com/go-via/via-plugin-picocss v0.1.1
-	github.com/ryanhamamura/via v0.2.3
-)
 
 require (
 	github.com/CAFxX/httpcompression v0.0.9 // indirect
 	github.com/alexedwards/scs/v2 v2.9.0 // indirect
 	github.com/andybalholm/brotli v1.2.0 // indirect
-	github.com/go-via/via v0.1.4 // indirect
 	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/starfederation/datastar-go v1.0.3 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect

go.sum

@@ -8,10 +8,6 @@ github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUS
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-via/via v0.1.4 h1:Fz9fwaT5+TBqcetiVM33SxkuysAeFDOiiASFu3GW7WY=
-github.com/go-via/via v0.1.4/go.mod h1:Y8oddRwP6SWX15Xb6UQj4HtLZwxTYI1HbWBmELtB/f8=
-github.com/go-via/via-plugin-picocss v0.1.1 h1:rbA9wL9eEanT8HOOfX1b4Mr2L2VjaDrsIrUECDxV73k=
-github.com/go-via/via-plugin-picocss v0.1.1/go.mod h1:npvsvG2FWeIPkzHzSSzW+uBGE0m5gnIAdlePqKcfuAQ=
 github.com/google/brotli/go/cbrotli v0.0.0-20230829110029-ed738e842d2f h1:jopqB+UTSdJGEJT8tEqYyE29zN91fi2827oLET8tl7k=
 github.com/google/brotli/go/cbrotli v0.0.0-20230829110029-ed738e842d2f/go.mod h1:nOPhAkwVliJdNTkj3gXpljmWhjc4wCaVqbMJcPKWP4s=
 github.com/klauspost/compress v1.16.7/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=

main.go

@@ -1,9 +1,6 @@
 package main
 
 import (
-	"crypto/rand"
-	"encoding/hex"
-
 	"github.com/ryanhamamura/c4/game"
 	"github.com/ryanhamamura/c4/ui"
 	"github.com/ryanhamamura/via"
@@ -29,14 +26,6 @@ func main() {
 	v.Page("/", func(c *via.Context) {
 		nickname := c.Signal("")
 
-		setNickname := c.Action(func() {
-			name := nickname.String()
-			if name != "" {
-				c.Session().Set("nickname", name)
-				c.Sync()
-			}
-		})
-
 		createGame := c.Action(func() {
 			name := nickname.String()
 			if name == "" {
@@ -51,7 +40,7 @@ func main() {
 		c.View(func() h.H {
 			return ui.LobbyView(
 				nickname.Bind(),
-				setNickname.OnKeyDown("Enter"),
+				createGame.OnKeyDown("Enter"),
 				createGame.OnClick(),
 			)
 		})
@@ -66,8 +55,6 @@ func main() {
 		colSignal := c.Signal(0)
 
 		var gi *game.GameInstance
-		var player *game.Player
-		var playerJoined bool
 		var gameExists bool
 
 		// Look up game (may not exist during warmup or invalid ID)
@@ -75,6 +62,13 @@ func main() {
 			gi, gameExists = store.Get(gameID)
 		}
 
+		// Generate a stable player ID for this session
+		playerID := game.PlayerID(c.Session().GetString("player_id"))
+		if playerID == "" {
+			playerID = game.PlayerID(game.GenerateID(8))
+			c.Session().Set("player_id", string(playerID))
+		}
+
 		setNickname := c.Action(func() {
 			if gi == nil {
 				return
@@ -85,12 +79,13 @@ func main() {
 			}
 			c.Session().Set("nickname", name)
 
-			if !playerJoined {
+			// Try to join if not already in game
-				player = &game.Player{
+			if gi.GetPlayerColor(playerID) == 0 {
-					ID:       game.PlayerID(generatePlayerID()),
+				player := &game.Player{
+					ID:       playerID,
 					Nickname: name,
 				}
-				playerJoined = gi.Join(&game.PlayerSession{
+				gi.Join(&game.PlayerSession{
 					Player: player,
 					Sync:   c,
 				})
@@ -99,20 +94,25 @@ func main() {
 		})
 
 		dropPiece := c.Action(func() {
-			if gi == nil || player == nil {
+			if gi == nil {
+				return
+			}
+			myColor := gi.GetPlayerColor(playerID)
+			if myColor == 0 {
 				return
 			}
 			col := colSignal.Int()
-			gi.DropPiece(col, player.Color)
+			gi.DropPiece(col, myColor)
+			c.Sync()
 		})
 
 		// If nickname exists in session and game exists, join immediately
-		if gameExists && sessionNickname != "" {
+		if gameExists && sessionNickname != "" && gi.GetPlayerColor(playerID) == 0 {
-			player = &game.Player{
+			player := &game.Player{
-				ID:       game.PlayerID(generatePlayerID()),
+				ID:       playerID,
 				Nickname: sessionNickname,
 			}
-			playerJoined = gi.Join(&game.PlayerSession{
+			gi.Join(&game.PlayerSession{
 				Player: player,
 				Sync:   c,
 			})
@@ -125,8 +125,10 @@ func main() {
 				return h.Div()
 			}
 
-			// Need nickname first
+			myColor := gi.GetPlayerColor(playerID)
-			if !playerJoined {
+
+			// Need nickname first / not joined yet
+			if myColor == 0 {
 				return ui.NicknamePrompt(
 					nickname.Bind(),
 					setNickname.OnKeyDown("Enter"),
@@ -135,7 +137,6 @@ func main() {
 			}
 
 			g := gi.GetGame()
-			myColor := player.Color
 
 			// Create column click function
 			columnClick := func(col int) h.H {
@@ -164,12 +165,6 @@ func main() {
 	v.Start()
 }
 
-func generatePlayerID() string {
-	b := make([]byte, 8)
-	rand.Read(b)
-	return hex.EncodeToString(b)
-}
-
 const gameCSS = `
 	body { margin: 0; }
 

ui/lobby.go

@@ -4,7 +4,7 @@ import (
 	"github.com/ryanhamamura/via/h"
 )
 
-func LobbyView(nicknameBind, setNicknameKeyDown, createGameClick h.H) h.H {
+func LobbyView(nicknameBind, createGameKeyDown, createGameClick h.H) h.H {
 	return h.Main(h.Class("container"),
 		h.Div(h.Class("lobby"),
 			h.H1(h.Text("Connect 4")),
@@ -18,7 +18,7 @@ func LobbyView(nicknameBind, setNicknameKeyDown, createGameClick h.H) h.H {
 						h.Placeholder("Enter your nickname"),
 						nicknameBind,
 						h.Attr("required"),
-						setNicknameKeyDown,
+						createGameKeyDown,
 					),
 				),
 				h.Button(