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* Arcade session manager
* Handles database operations and validation for arcade sessions
*/
import { eq, and } from 'drizzle-orm'
import { db, schema } from '@/db'
import { buildPlayerOwnershipMap, type PlayerOwnershipMap } from './player-ownership'
import { getValidator, type GameName } from './validators'
import type { GameMove } from './validation/types'
/**
* Namespaced game state structure.
* Each game's state is stored under its game name key.
* This allows switching games without losing state.
*/
export type NamespacedGameState = {
[gameName: string]: unknown
}
/**
* Check if gameState is in the new namespaced format.
* Old format: flat state object
* New format: { [gameName]: state }
*/
function isNamespacedState(gameState: unknown): gameState is NamespacedGameState {
if (!gameState || typeof gameState !== 'object') return false
// Check if it looks like a namespaced state (has game name keys)
// The old format would have keys like 'gamePhase', 'regionsFound', etc.
// The new format has keys like 'know-your-world', 'matching', etc.
const keys = Object.keys(gameState)
// If it has typical game state keys, it's the old format
const oldFormatKeys = ['gamePhase', 'currentPrompt', 'cards', 'board', 'score']
return !keys.some((key) => oldFormatKeys.includes(key))
}
/**
* Extract a game's state from the session, handling both old and new formats.
* @param session - The arcade session
* @param gameName - The game to extract state for
* @returns The game-specific state, or undefined if not found
*/
export function getGameStateFromSession(
session: schema.ArcadeSession,
gameName: string
): unknown | undefined {
const gameState = session.gameState as unknown
const isNamespaced = isNamespacedState(gameState)
if (isNamespaced) {
// New format: extract from namespace
return (gameState as NamespacedGameState)[gameName]
}
// Old format: if currentGame matches, return the flat state
// This provides backward compatibility during migration
if (session.currentGame === gameName) {
return gameState
}
// Game mismatch with old format - no state available
return undefined
}
/**
* Create a namespaced game state object with the given game's state.
* Preserves existing game states when updating.
*/
export function setGameStateInNamespace(
existingState: unknown,
gameName: string,
newState: unknown
): NamespacedGameState {
const namespaced: NamespacedGameState = isNamespacedState(existingState)
? { ...existingState }
: {}
namespaced[gameName] = newState
return namespaced
}
export interface CreateSessionOptions {
userId: string // User who owns/created the session (typically room creator)
gameName: GameName
gameUrl: string
initialState: unknown
activePlayers: string[] // Player IDs (UUIDs)
roomId: string // Required - PRIMARY KEY, one session per room
}
export interface SessionUpdateResult {
success: boolean
error?: string
session?: schema.ArcadeSession
versionConflict?: boolean
}
const TTL_HOURS = 24
/**
* Get arcade session by room ID (for room-based multiplayer games)
* Returns the shared session for all room members
* @param roomId - The room ID (primary key)
*/
export async function getArcadeSessionByRoom(
roomId: string
): Promise<schema.ArcadeSession | undefined> {
// roomId is now the PRIMARY KEY, so direct lookup
const [session] = await db
.select()
.from(schema.arcadeSessions)
.where(eq(schema.arcadeSessions.roomId, roomId))
.limit(1)
if (!session) return undefined
// Check if session has expired
if (session.expiresAt < new Date()) {
// Clean up expired room session
await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.roomId, roomId))
return undefined
}
return session
}
/**
* Create a new arcade session
* For room-based games, roomId is the PRIMARY KEY ensuring one session per room
*/
export async function createArcadeSession(
options: CreateSessionOptions
): Promise<schema.ArcadeSession> {
const now = new Date()
const expiresAt = new Date(now.getTime() + TTL_HOURS * 60 * 60 * 1000)
// Check if session already exists for this room (roomId is PRIMARY KEY)
const existingRoomSession = await getArcadeSessionByRoom(options.roomId)
if (existingRoomSession) {
return existingRoomSession
}
// Look up user by database user.id (the client always sends users.id now)
const user = await db.query.users.findFirst({
where: eq(schema.users.id, options.userId),
})
if (!user) {
throw new Error(`User not found: ${options.userId}`)
}
// Delete any existing sessions for this user (to handle UNIQUE constraint on userId)
// This ensures the user can start a new game session
await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.userId, user.id))
// Store game state in namespaced format: { [gameName]: state }
// This allows switching games without losing state
const namespacedState: NamespacedGameState = {
[options.gameName]: options.initialState,
}
const newSession: schema.NewArcadeSession = {
roomId: options.roomId, // PRIMARY KEY - one session per room
userId: user.id, // Use the actual database ID, not the guestId
currentGame: options.gameName,
gameUrl: options.gameUrl,
gameState: namespacedState as any,
activePlayers: options.activePlayers as any,
startedAt: now,
lastActivityAt: now,
expiresAt,
isActive: true,
version: 1,
}
try {
const [session] = await db.insert(schema.arcadeSessions).values(newSession).returning()
return session
} catch (error) {
// Handle PRIMARY KEY constraint violation (UNIQUE constraint on roomId)
// This can happen if two users try to create a session for the same room simultaneously
if (error instanceof Error && error.message.includes('UNIQUE constraint failed')) {
const existingSession = await getArcadeSessionByRoom(options.roomId)
if (existingSession) {
return existingSession
}
}
// Re-throw other errors
throw error
}
}
/**
* Get active arcade session for a user
* @param userId - The database user.id
*/
export async function getArcadeSession(userId: string): Promise<schema.ArcadeSession | undefined> {
const [session] = await db
.select()
.from(schema.arcadeSessions)
.where(eq(schema.arcadeSessions.userId, userId))
.limit(1)
if (!session) return undefined
// Check if session has expired
if (session.expiresAt < new Date()) {
await deleteArcadeSessionByRoom(session.roomId)
return undefined
}
// Verify the room still exists (roomId is now required/PRIMARY KEY)
const room = await db.query.arcadeRooms.findFirst({
where: eq(schema.arcadeRooms.id, session.roomId),
})
if (!room) {
await deleteArcadeSessionByRoom(session.roomId)
return undefined
}
return session
}
/**
* Apply a game move to the session (with validation)
* @param userId - The database user.id of the player making the move
* @param move - The game move to apply
* @param roomId - Optional room ID for room-based games (enables shared session)
*/
export async function applyGameMove(
userId: string,
move: GameMove,
roomId?: string
): Promise<SessionUpdateResult> {
// For room-based games, look up the shared room session
// For solo games, look up the user's personal session
const session = roomId ? await getArcadeSessionByRoom(roomId) : await getArcadeSession(userId)
if (!session) {
return {
success: false,
error: 'No active session found',
}
}
if (!session.isActive) {
return {
success: false,
error: 'Session is not active',
}
}
// Get the validator for this game
const gameName = session.currentGame as GameName
const validator = await getValidator(gameName)
// Extract the current game's state from the namespaced storage
const currentGameState = getGameStateFromSession(session, gameName)
if (currentGameState === undefined) {
console.error(
`[SessionManager] No state found for game ${gameName} in session ${session.roomId}`
)
return {
success: false,
error: `No state found for game ${gameName}`,
}
}
// Fetch player ownership for authorization checks (room-based games)
let playerOwnership: PlayerOwnershipMap | undefined
if (session.roomId) {
try {
playerOwnership = await buildPlayerOwnershipMap(session.roomId)
} catch (error) {
console.error('[SessionManager] Failed to fetch player ownership:', error)
}
}
// Validate the move with authorization context
const validationResult = await validator.validateMove(currentGameState, move, {
userId,
playerOwnership,
})
if (!validationResult.valid) {
return {
success: false,
error: validationResult.error || 'Invalid move',
}
}
// Update the session with new state (using optimistic locking)
// Store the new state in the namespaced format, preserving other games' states
const updatedNamespacedState = setGameStateInNamespace(
session.gameState,
gameName,
validationResult.newState
)
const now = new Date()
const expiresAt = new Date(now.getTime() + TTL_HOURS * 60 * 60 * 1000)
try {
const [updatedSession] = await db
.update(schema.arcadeSessions)
.set({
gameState: updatedNamespacedState as any,
lastActivityAt: now,
expiresAt,
version: session.version + 1,
})
.where(
and(
eq(schema.arcadeSessions.roomId, session.roomId), // Use roomId (PRIMARY KEY)
eq(schema.arcadeSessions.version, session.version) // Optimistic locking
)
)
.returning()
if (!updatedSession) {
// Version conflict - another move was processed first
// Query the current state to see what version we're at now
const [currentSession] = await db
.select()
.from(schema.arcadeSessions)
.where(eq(schema.arcadeSessions.roomId, session.roomId))
.limit(1)
const versionDiff = currentSession ? currentSession.version - session.version : 'unknown'
console.warn(
`[SessionManager] VERSION_CONFLICT room=${session.roomId} game=${session.currentGame} expected_v=${session.version} actual_v=${currentSession?.version} diff=${versionDiff} move=${move.type} user=${userId}`
)
return {
success: false,
error: 'Version conflict - please retry',
versionConflict: true,
}
}
return {
success: true,
session: updatedSession,
}
} catch (error) {
console.error('Error updating session:', error)
return {
success: false,
error: 'Database error',
}
}
}
/**
* Delete an arcade session by room ID
* @param roomId - The room ID (PRIMARY KEY)
*/
export async function deleteArcadeSessionByRoom(roomId: string): Promise<void> {
await db.delete(schema.arcadeSessions).where(eq(schema.arcadeSessions.roomId, roomId))
}
/**
* Delete an arcade session by user (finds the user's session first)
* @param userId - The database user.id
*/
export async function deleteArcadeSession(userId: string): Promise<void> {
// First find the session to get its roomId
const session = await getArcadeSession(userId)
if (!session) return
// Delete by roomId (PRIMARY KEY)
await deleteArcadeSessionByRoom(session.roomId)
}
/**
* Update session activity timestamp (keep-alive)
* @param userId - The database user.id
*/
export async function updateSessionActivity(userId: string): Promise<void> {
// First find the session to get its roomId
const session = await getArcadeSession(userId)
if (!session) return
const now = new Date()
const expiresAt = new Date(now.getTime() + TTL_HOURS * 60 * 60 * 1000)
// Update using roomId (PRIMARY KEY)
await db
.update(schema.arcadeSessions)
.set({
lastActivityAt: now,
expiresAt,
})
.where(eq(schema.arcadeSessions.roomId, session.roomId))
}
/**
* Update session's active players (only if game hasn't started)
* Used when new members join a room
* @param roomId - The room ID (PRIMARY KEY)
* @param playerIds - Array of player IDs to set as active players
* @returns true if updated, false if game already started or session not found
*/
export async function updateSessionActivePlayers(
roomId: string,
playerIds: string[]
): Promise<boolean> {
const session = await getArcadeSessionByRoom(roomId)
if (!session) return false
// Extract the current game's state
const gameName = session.currentGame as string
const currentGameState = getGameStateFromSession(session, gameName) as Record<string, unknown>
if (!currentGameState) {
console.error(
`[SessionManager] No state found for game ${gameName} when updating active players`
)
return false
}
// Only update if game is in setup phase (not started yet)
if (currentGameState.gamePhase !== 'setup') {
return false
}
// Update the game state with new player IDs
const updatedGameState = {
...currentGameState,
activePlayers: playerIds,
}
// Store back in namespaced format
const updatedNamespacedState = setGameStateInNamespace(
session.gameState,
gameName,
updatedGameState
)
const now = new Date()
await db
.update(schema.arcadeSessions)
.set({
activePlayers: playerIds as any,
gameState: updatedNamespacedState as any,
lastActivityAt: now,
version: session.version + 1,
})
.where(eq(schema.arcadeSessions.roomId, roomId))
return true
}
/**
* Clean up expired sessions (should be called periodically)
*/
export async function cleanupExpiredSessions(): Promise<number> {
const now = new Date()
const result = await db
.delete(schema.arcadeSessions)
.where(eq(schema.arcadeSessions.expiresAt, now))
.returning()
return result.length
}
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