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/* eslint-disable no-console */
/* eslint-disable no-param-reassign */
import crypto from 'crypto';
import APIError from '../../helpers/error';
import { t } from '../../helpers/i18n';
const DEBUG = true;
let agentsIo;
let agentModel;
// Global queue
const queueError = {};
const STATUS = {
CONNECTED: 'connected',
DISCONNECTED: 'disconnected',
};
const TIMEOUT_SEND_EVENT = 10000; // 10 seconds
const TIMEOUT_QUEUE_PROCESS = 5000; // 5 seconds
// Get Sockets
const getSockets = async () => {
if (agentsIo) {
const sockets = await agentsIo.fetchSockets();
return sockets;
}
return [];
};
const getAgentByCode = async (code) => {
if (code) {
const sockets = await getSockets();
return sockets.find(
(socket) => socket.data.dataModel && socket.data.dataModel.code === code
);
}
return null;
};
const sleep = (time = 100) =>
new Promise((resolve) => {
setTimeout(() => resolve(), time);
});
const generateUniqueId = () => crypto.randomBytes(16).toString('hex');
// Adiciona na fila para tratar erros de conexao
const queueMessage = (socket, data) => {
try {
const uniqueMessageId = generateUniqueId();
queueError[uniqueMessageId] = {
hasError: false,
id: uniqueMessageId,
socket,
data,
};
const timeoutError = setTimeout(() => {
if (queueError[uniqueMessageId]) {
queueError[uniqueMessageId].hasError = true;
}
}, TIMEOUT_SEND_EVENT);
return { timeoutError, uniqueMessageId };
} catch (e) {
console.log('queueMessageError', e.message);
}
return {};
};
// Remove da fila pois recebeu mensagem de retorno callback
const queueRemoveMessage = (queueMessageObj = {}) => {
try {
const { timeoutError, uniqueMessageId } = queueMessageObj;
if (timeoutError) clearTimeout(timeoutError);
if (uniqueMessageId && queueError[uniqueMessageId]) {
delete queueError[uniqueMessageId];
}
} catch (e) {
console.log('queueRemoveMessageError', e.message);
}
};
const sendPrinterEvent = (socket, data) => {
if (!socket)
throw new APIError('', t('BEE3509' /* Agente não localizado! */));
return new Promise((resolve, reject) => {
// Adiciona na queue para tratar erros de conexao e reenvio da mensagem
const queueMessageObject = queueMessage(socket, data);
socket
.timeout(TIMEOUT_SEND_EVENT)
.emit('printer-event', data, (err, response) => {
// Remove da fila pois recebeu retorno
queueRemoveMessage(queueMessageObject);
if (err) {
reject(err);
} else {
resolve(response);
}
});
});
};
const disconnectAgent = async (code) => {
try {
if (code) {
const sockets = await getSockets();
const socketFinded = sockets.find(
(socket) => socket.data.dataModel && socket.data.dataModel.code === code
);
if (socketFinded) socketFinded.disconnect(true);
}
} catch (e) {
console.log('SOCKET AGENT ERROR disconnectAgent => ', e);
}
return null;
};
// Processa a fila de impressao que contem erros
const queueProcessLoop = async () => {
while (true) {
try {
Object.entries(queueError).forEach((itemQueue) => {
if (itemQueue.hasError) {
const { socket, data, id } = itemQueue;
// Remove da fila para nao ser reprocessado
delete queueError[id];
sendPrinterEvent(socket, data);
}
});
} catch (e) {
console.log('queueProcessLoop', e.message);
}
await sleep(TIMEOUT_QUEUE_PROCESS);
}
};
const initialize = async (io, models) => {
agentModel = models.Agent;
// Initialize disconnect all sockets
await agentModel.update(
{ status: STATUS.DISCONNECTED },
{ where: { status: STATUS.CONNECTED } }
);
agentModel.afterDestroy((agent) => {
disconnectAgent(agent.code);
});
agentModel.afterUpdate((agent) => {
let bDisconnectAgent = false;
if (agent.changed('active') && !agent.active) bDisconnectAgent = true;
else if (agent.changed('token')) bDisconnectAgent = true;
if (bDisconnectAgent) disconnectAgent(agent.code);
});
if (io) {
agentsIo = io.of('/agents');
// Authorization Bearer Middleware
agentsIo.use(async (socket, next) => {
try {
const authHeader = socket.handshake.headers.authorization;
const code = socket.handshake.headers.appcode || '';
let token =
authHeader &&
authHeader.startsWith('Bearer ') &&
authHeader.substring(7).trim();
if (token) {
const agentModelToken = await agentModel.findOne({
attributes: ['token'],
where: { code, token, active: true },
raw: true,
});
token =
agentModelToken && agentModelToken.token
? agentModelToken.token
: null;
}
if (token) {
socket.data.token = token;
next();
} else {
next(new Error('Invalid token Or Agent Inactived'));
}
} catch (e) {
console.log('SOCKET AGENT ERROR auth => ', e);
next(new Error('Invalid token Or Agent Inactived'));
}
});
// ###############################
// Listeners
agentsIo.on('connection', (socket) => {
if (DEBUG)
console.log(
'[Agent connected] ',
(socket.data &&
socket.data.dataModel &&
socket.data.dataModel.code) ||
socket.id
);
socket.on('disconnect', async (/* reason */) => {
try {
if (DEBUG)
console.log(
'[Agent disconnected] ',
(socket.data &&
socket.data.dataModel &&
socket.data.dataModel.code) ||
socket.id
);
await agentModel.update(
{ status: STATUS.DISCONNECTED },
{ where: { token: socket.data.token } }
);
} catch (e) {
console.log('SOCKET AGENT ERROR disconnect => ', e);
}
});
socket.on('initialized', async (data) => {
try {
if (data) {
const agentModelToken = await agentModel.findOne({
where: { token: socket.data.token, active: true },
});
await agentModelToken.update({
osData: data,
status: STATUS.CONNECTED,
});
socket.data.dataModel = agentModelToken.toJSON();
}
} catch (e) {
console.log('SOCKET AGENT ERROR initialized => ', e);
}
});
socket.emit('initialized');
});
// Loop de processo para fila com erro de impressao
queueProcessLoop();
// #########
}
};
export default {
initialize,
getAgentByCode,
sendPrinterEvent,
STATUS,
};
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