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const jwt = require("jsonwebtoken");
const uuidv4 = require("uuid/v4");
const WebSocket = require("ws");
wss = new WebSocket.Server({ clientTracking: false, noServer: true });
/* eslint-disable-next-line */
const pick = (O, ...K) => K.reduce((o, k) => ((o[k] = O[k]), o), {});
sockets = {};
emit = (username, type, data) => {
if (data.username !== undefined) data = pick(data, ...whitelist);
if (!sockets[username]) return;
for (id in sockets[username]) {
const ws = sockets[username][id];
ws.send(JSON.stringify({ type, data }));
}
};
broadcast = (type, data) => {
for (const username in sockets) {
for (const id in sockets[username]) {
const ws = sockets[username][id];
ws.send(JSON.stringify({ type, data }));
}
}
};
server.on("upgrade", function (req, socket, head) {
wss.handleUpgrade(req, socket, head, function (ws) {
wss.emit("connection", ws, req);
});
});
const names = {};
wss.on("connection", function (ws, req) {
const id = uuidv4();
setTimeout(() => ws.ok || ws.close(), 2000);
ws.on("message", async (token) => {
if (!token || token === "null") return;
try {
const username = jwt.decode(token).username;
if (!sockets[username]) sockets[username] = {};
sockets[username][id] = ws;
names[id] = username;
ws.ok = true;
ws.send(JSON.stringify({ type: "networks", data: networks }));
ws.send(JSON.stringify({ type: "rates", data: app.get("rates") }));
ws.send(JSON.stringify({ type: "login", data: await getUser(username) }));
l.info("socket open", username, id);
} catch (e) {
ws.close();
l.error("problem opening socket", token, e.message, id, req.connection.remoteAddress);
}
});
ws.on("close", function () {
try {
const username = names[id];
if (sockets[username] && sockets[username][id]) delete sockets[username][id];
l.info("socket closed", username, id);
} catch(e) {
l.error("problem closing socket", e.message);
}
});
});
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