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|
package game
import (
"context"
"log"
"time"
"github.com/jackc/pgx/v5/pgtype"
"github.com/nsfisis/iosdc-2024-albatross/backend/api"
"github.com/nsfisis/iosdc-2024-albatross/backend/db"
)
type playerClientState int
const (
playerClientStateWaitingEntries playerClientState = iota
playerClientStateEntried
playerClientStateReady
)
type gameHub struct {
ctx context.Context
game *game
q *db.Queries
players map[*playerClient]playerClientState
registerPlayer chan *playerClient
unregisterPlayer chan *playerClient
playerC2SMessages chan *playerMessageC2SWithClient
watchers map[*watcherClient]bool
registerWatcher chan *watcherClient
unregisterWatcher chan *watcherClient
}
func newGameHub(ctx context.Context, game *game, q *db.Queries) *gameHub {
return &gameHub{
ctx: ctx,
game: game,
q: q,
players: make(map[*playerClient]playerClientState),
registerPlayer: make(chan *playerClient),
unregisterPlayer: make(chan *playerClient),
playerC2SMessages: make(chan *playerMessageC2SWithClient),
watchers: make(map[*watcherClient]bool),
registerWatcher: make(chan *watcherClient),
unregisterWatcher: make(chan *watcherClient),
}
}
func (hub *gameHub) run() {
ticker := time.NewTicker(10 * time.Second)
defer func() {
ticker.Stop()
}()
for {
select {
case player := <-hub.registerPlayer:
hub.players[player] = playerClientStateWaitingEntries
case player := <-hub.unregisterPlayer:
if _, ok := hub.players[player]; ok {
hub.closePlayerClient(player)
}
case watcher := <-hub.registerWatcher:
hub.watchers[watcher] = true
case watcher := <-hub.unregisterWatcher:
if _, ok := hub.watchers[watcher]; ok {
hub.closeWatcherClient(watcher)
}
case message := <-hub.playerC2SMessages:
switch message.message.(type) {
case *playerMessageC2SEntry:
log.Printf("entry: %v", message.message)
// TODO: assert state is waiting_entries
hub.players[message.client] = playerClientStateEntried
entriedPlayerCount := 0
for _, state := range hub.players {
if playerClientStateEntried <= state {
entriedPlayerCount++
}
}
if entriedPlayerCount == 2 {
for player := range hub.players {
player.s2cMessages <- &playerMessageS2CPrepare{
Type: playerMessageTypeS2CPrepare,
Data: playerMessageS2CPreparePayload{
Problem: api.Problem{
ProblemId: 1,
Title: "the answer",
Description: "print 42",
},
},
}
}
err := hub.q.UpdateGameState(hub.ctx, db.UpdateGameStateParams{
GameID: int32(hub.game.gameID),
State: string(gameStatePrepare),
})
if err != nil {
log.Fatalf("failed to set game state: %v", err)
}
hub.game.state = gameStatePrepare
}
case *playerMessageC2SReady:
log.Printf("ready: %v", message.message)
// TODO: assert state is prepare
hub.players[message.client] = playerClientStateReady
readyPlayerCount := 0
for _, state := range hub.players {
if playerClientStateReady <= state {
readyPlayerCount++
}
}
if readyPlayerCount == 2 {
startAt := time.Now().Add(11 * time.Second).UTC()
for player := range hub.players {
player.s2cMessages <- &playerMessageS2CStart{
Type: playerMessageTypeS2CStart,
Data: playerMessageS2CStartPayload{
StartAt: int(startAt.Unix()),
},
}
}
err := hub.q.UpdateGameStartedAt(hub.ctx, db.UpdateGameStartedAtParams{
GameID: int32(hub.game.gameID),
StartedAt: pgtype.Timestamp{
Time: startAt,
InfinityModifier: pgtype.Finite,
Valid: true,
},
})
if err != nil {
log.Fatalf("failed to set game state: %v", err)
}
hub.game.startedAt = &startAt
err = hub.q.UpdateGameState(hub.ctx, db.UpdateGameStateParams{
GameID: int32(hub.game.gameID),
State: string(gameStateStarting),
})
if err != nil {
log.Fatalf("failed to set game state: %v", err)
}
hub.game.state = gameStateStarting
}
default:
log.Fatalf("unexpected message type: %T", message.message)
}
case <-ticker.C:
if hub.game.state == gameStateGaming {
if time.Now().After(hub.game.startedAt.Add(time.Duration(hub.game.durationSeconds) * time.Second)) {
err := hub.q.UpdateGameState(hub.ctx, db.UpdateGameStateParams{
GameID: int32(hub.game.gameID),
State: string(gameStateFinished),
})
if err != nil {
log.Fatalf("failed to set game state: %v", err)
}
hub.game.state = gameStateFinished
}
hub.close()
return
}
}
}
}
func (hub *gameHub) close() {
for client := range hub.players {
hub.closePlayerClient(client)
}
close(hub.registerPlayer)
close(hub.unregisterPlayer)
close(hub.playerC2SMessages)
for watcher := range hub.watchers {
hub.closeWatcherClient(watcher)
}
close(hub.registerWatcher)
close(hub.unregisterWatcher)
}
func (hub *gameHub) closePlayerClient(player *playerClient) {
delete(hub.players, player)
close(player.s2cMessages)
}
func (hub *gameHub) closeWatcherClient(watcher *watcherClient) {
delete(hub.watchers, watcher)
close(watcher.s2cMessages)
}
type GameHubs struct {
hubs map[int]*gameHub
q *db.Queries
}
func NewGameHubs(q *db.Queries) *GameHubs {
return &GameHubs{
hubs: make(map[int]*gameHub),
q: q,
}
}
func (hubs *GameHubs) Close() {
for _, hub := range hubs.hubs {
hub.close()
}
}
func (hubs *GameHubs) RestoreFromDB(ctx context.Context) error {
games, err := hubs.q.ListGames(ctx)
if err != nil {
return err
}
for _, row := range games {
var startedAt *time.Time
if row.StartedAt.Valid {
startedAt = &row.StartedAt.Time
}
var problem_ *problem
if row.ProblemID.Valid {
if !row.Title.Valid || !row.Description.Valid {
panic("inconsistent data")
}
problem_ = &problem{
problemID: int(row.ProblemID.Int32),
title: row.Title.String,
description: row.Description.String,
}
}
hubs.hubs[int(row.GameID)] = newGameHub(ctx, &game{
gameID: int(row.GameID),
durationSeconds: int(row.DurationSeconds),
state: gameState(row.State),
displayName: row.DisplayName,
startedAt: startedAt,
problem: problem_,
}, hubs.q)
}
return nil
}
func (hubs *GameHubs) Run() {
for _, hub := range hubs.hubs {
go hub.run()
}
}
func (hubs *GameHubs) SockHandler() *sockHandler {
return newSockHandler(hubs)
}
|
