All files / web/src/app/api/arcade/rooms/[roomId]/leave route.ts

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import { NextResponse } from 'next/server'
import { getRoomById } from '@/lib/arcade/room-manager'
import { getRoomMembers, isMember, removeMember } from '@/lib/arcade/room-membership'
import { getRoomActivePlayers } from '@/lib/arcade/player-manager'
import { withAuth } from '@/lib/auth/withAuth'
import { getUserId } from '@/lib/viewer'
import { getSocketIO } from '@/lib/socket-io'

/**
 * POST /api/arcade/rooms/:roomId/leave
 * Leave a room
 */
export const POST = withAuth(async (_request, { params }) => {
  try {
    const { roomId } = (await params) as { roomId: string }
    const userId = await getUserId()

    // Get room
    const room = await getRoomById(roomId)
    if (!room) {
      return NextResponse.json({ error: 'Room not found' }, { status: 404 })
    }

    // Check if member - if not, return success (idempotent: already left)
    const isMemberOfRoom = await isMember(roomId, userId)
    if (!isMemberOfRoom) {
      // Already not a member - return success since desired state is achieved
      // This handles the case where user was auto-left from creating/joining another room
      return NextResponse.json({ success: true, alreadyLeft: true })
    }

    // Remove member
    await removeMember(roomId, userId)

    // Broadcast to all remaining users in the room via socket
    const io = await getSocketIO()
    if (io) {
      try {
        const members = await getRoomMembers(roomId)
        const memberPlayers = await getRoomActivePlayers(roomId)

        // Convert memberPlayers Map to object for JSON serialization
        const memberPlayersObj: Record<string, any[]> = {}
        for (const [uid, players] of memberPlayers.entries()) {
          memberPlayersObj[uid] = players
        }

        // Broadcast to all users in this room
        io.to(`room:${roomId}`).emit('member-left', {
          roomId,
          userId: userId,
          members,
          memberPlayers: memberPlayersObj,
        })

        console.log(`[Leave API] Broadcasted member-left for user ${userId} in room ${roomId}`)
      } catch (socketError) {
        // Log but don't fail the request if socket broadcast fails
        console.error('[Leave API] Failed to broadcast member-left:', socketError)
      }
    }

    return NextResponse.json({ success: true })
  } catch (error) {
    console.error('Failed to leave room:', error)
    return NextResponse.json({ error: 'Failed to leave room' }, { status: 500 })
  }
})