mime-chat/src/background/session.ts
2021-02-15 08:56:19 -06:00

170 lines
4 KiB
TypeScript

"use strict";
import WebSocket from 'ws';
import { backgroundMitt } from './emitter';
import { ipcMain } from "electron";
interface RenderMessage {
content: string;
context: string;
subContext: string;
modifier: string;
time: string;
id: string;
}
interface UserCreds {
email: string;
password: string;
}
interface TextMessage {
audio: 0;
content: string;
}
const ip = 'ws://127.0.0.1';
const port = 8081;
const reconnectTimeout = 3000; //ms
let socket: WebSocket;
let success = false;
let auth = false;
const authSession = async (_event, payload: string | UserCreds | null): Promise<string> => {
return new Promise((resolve, reject) => {
console.log('authenticating...');
backgroundMitt.once('auth-res', (res: string) => {
if (res === 'locked') {
reject(res);
} else {
console.log('Success!');
auth = true;
resolve(res);
}
});
if (!payload) {
socket.send('no-token');
} else if (payload instanceof String || typeof payload === 'string') {
socket.send(payload);
} else {
socket.send(JSON.stringify(payload));
}
});
};
const receiveMessage = (message: string): void => {
while (!auth) {
backgroundMitt.emit('auth-res', message);
return;
}
const parsed: RenderMessage = JSON.parse(message);
if (parsed.modifier === "sf") {
backgroundMitt.emit('message-res', parsed);
} else if (parsed.modifier === "ai") {
backgroundMitt.emit('ipc-renderer', {
endpoint: 'render-message',
message: parsed
});
}
};
const asyncSend = (_event?, payload: TextMessage | Buffer): Promise<RenderMessage> => {
return new Promise((resolve, reject) => {
backgroundMitt.once('message-res', (res: RenderMessage) => {
console.log(res)
if (res.content) {
resolve(res);
} else {
reject('ERROR: NO MESSAGE');
}
});
if (payload instanceof Buffer) {
socket.send(payload);
} else if (payload) {
socket.send(JSON.stringify(payload));
}
});
}
export const sendAudio = async (content: Buffer) => {
const res = await asyncSend(null, content);
backgroundMitt.emit('ipc-renderer', {
endpoint: 'render-message',
message: res
});
}
// Run every time we want to connect to backend.
export const initSession = () => {
// Close existing sockets.
if (socket) {
socket.removeAllListeners();
socket.terminate();
socket.close();
success = false;
}
// Init new socket.
socket = new WebSocket(`${ip}:${port}`);
socket.binaryType = 'arraybuffer';
// handle renderer auth-token event
ipcMain.removeHandler('auth-session'); // avoid setting duplicate handlers
ipcMain.handle('auth-session', authSession);
// handle renderer send-message event
ipcMain.removeHandler('message'); // avoid setting duplicate handlers
ipcMain.handle('message', asyncSend);
// Connect to the backend.
socket.on('open', () => {
console.log('Connected to Crimata Servers.');
// call auth renderer event on connection
backgroundMitt.emit('ipc-renderer', {
endpoint: 'auth',
message: null
});
success = true;
});
// Handle for failed connect, try again.
socket.on('error', (_e) => {
console.log('ERROR: Failed to connect.');
socket.removeAllListeners();
socket.close();
setTimeout(() => {
if (!success) {
console.log('Reconnecting...');
initSession();
}
}, reconnectTimeout);
});
socket.on('close', () => {
console.log('Connection droped! Restarting...')
initSession();
});
socket.on("message", receiveMessage);
};