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import { get } from 'svelte/store';
import { rate, user, token, invoices, preferredCurrency } from '$lib/store';
let interval, socket;
export const auth = () => {
let t = get(token);
if (t) send('login', t);
};
export const send = (type, data) => {
socket?.readyState === 1 && socket.send(JSON.stringify({ type, data }));
};
export const messages = (data) => ({
rate() {
rate.set(data);
},
payment() {
invoices.set({ ...get(invoices), [data.invoice.uuid]: data.invoice });
},
connected: auth,
login() {
user.set(data);
preferredCurrency.set('USD');
}
});
const initialReconnectDelay = 1000;
const maxReconnectDelay = 16000;
let currentReconnectDelay = initialReconnectDelay;
export function connect() {
clearInterval(interval);
if (socket) return auth();
socket = new WebSocket('ws://localhost:3119/ws');
socket.addEventListener('open', onWebsocketOpen);
socket.addEventListener('close', onWebsocketClose);
socket.addEventListener('message', onWebsocketMessage);
interval = setInterval(() => send('heartbeat'), 5000);
}
export function close() {
if (socket) socket.close();
}
function onWebsocketMessage(msg) {
let { type, data } = JSON.parse(msg.data);
messages(data)[type] && messages(data)[type]();
}
function onWebsocketOpen() {
currentReconnectDelay = initialReconnectDelay;
}
function onWebsocketClose() {
socket = null;
setTimeout(() => {
reconnectToWebsocket();
}, currentReconnectDelay + Math.floor(Math.random() * 3000));
}
function reconnectToWebsocket() {
if (currentReconnectDelay < maxReconnectDelay) {
currentReconnectDelay *= 2;
}
connect();
}
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