ludo-web-multiplayer/backend/handlers/gameHandler.js
2023-11-12 13:35:47 +01:00

89 lines
2.8 KiB
JavaScript

const Room = require('../schemas/room');
const { getPawnPositionAfterMove } = require('../utils/functions');
module.exports = (io, socket) => {
const req = socket.request;
const handleMovePawn = async pawnId => {
const room = await getRoom();
const pawn = room.getPawn(pawnId);
if (isMoveValid(pawn, room)) {
const newPositionOfMovedPawn = getPawnPositionAfterMove(room.rolledNumber, pawn);
room.changePositionOfPawn(pawn, newPositionOfMovedPawn);
room.beatPawns(newPositionOfMovedPawn, req.session.color);
handleChangeOfPlayer(room);
}
};
const handleRollDice = async () => {
const rolledNumber = rollDice();
const room = await updateRoom({ rolledNumber: rolledNumber });
if (!canPlayerMove(room, rolledNumber)) {
handleChangeOfPlayer(room);
}
};
const rollDice = () => {
const rolledNumber = Math.ceil(Math.random() * 6);
sendToPlayersRolledNumber(rolledNumber);
return rolledNumber;
};
const canPlayerMove = (room, rolledNumber) => {
const playerPawns = room.getPlayerPawns(req.session.color);
for (const pawn of playerPawns) {
if (pawn.canMove(rolledNumber)) return true;
}
return false;
};
const isMoveValid = (pawn, room) => {
if (req.session.color !== pawn.color) {
return false;
}
if (req.session.playerId !== room.getCurrentlyMovingPlayer()._id.toString()) {
return false;
}
return true;
};
const handleChangeOfPlayer = async room => {
room.changeMovingPlayer();
room.timeoutID = setTimeout(makeRandomMove, 15000, room);
await updateRoom(room);
};
const makeRandomMove = async room => {
if (room.rolledNumber === null) room.rolledNumber = rollDice();
const pawnsThatCanMove = room.getPawnsThatCanMove()
if (pawnsThatCanMove.length > 0) {
const randomPawn = pawnsThatCanMove[Math.floor(Math.random() * pawnsThatCanMove.length)];
room.movePawn(randomPawn);
}
await handleChangeOfPlayer(room);
};
Room.watch().on('change', async () => {
sendToPlayersData(await getRoom());
});
const getRoom = async () => {
return await Room.findOne({ _id: req.session.roomId }).exec();
};
const updateRoom = async room => {
return await Room.findOneAndUpdate({ _id: req.session.roomId }, room).exec();
};
const sendToPlayersRolledNumber = rolledNumber => {
io.to(req.session.roomId).emit('game:roll', rolledNumber);
};
const sendToPlayersData = room => {
io.to(req.session.roomId).emit('room:data', JSON.stringify(room));
};
socket.on('game:roll', handleRollDice);
socket.on('game:move', handleMovePawn);
};