shotgun/lobby/lobby.go

package lobby

import (
	"sync"

	"github.com/google/uuid"

	"git.sunturtle.xyz/studio/shotgun/game"
	"git.sunturtle.xyz/studio/shotgun/player"
	"git.sunturtle.xyz/studio/shotgun/serve"
)

type GameID = serve.GameID

// Lobby is a set of active games.
type Lobby struct {
	mu sync.Mutex
	// games is the set of all active games in the lobby.
	games map[GameID]*game.Game
}

func New() *Lobby {
	return &Lobby{
		games: make(map[GameID]*game.Game),
	}
}

// Game returns the game with the given ID.
func (l *Lobby) Game(id GameID) *game.Game {
	l.mu.Lock()
	defer l.mu.Unlock()
	return l.games[id]
}

// Start begins a new game in the lobby.
// The caller must be able to distinguish the dealer's and challenger's conns
// in order to provide correct game start DTOs to each.
func (l *Lobby) Start(dealer, challenger player.ID) GameID {
	id := uuid.New()
	g := game.New(dealer, challenger)
	l.mu.Lock()
	defer l.mu.Unlock()
	l.games[id] = g
	return id
}

// Finish removes a game from the lobby.
func (l *Lobby) Finish(id GameID) {
	l.mu.Lock()
	defer l.mu.Unlock()
	delete(l.games, id)
}