kannon-client/kannon-client.js

const packageJSON = require('./package.json');
const path = require('path');

const Connection = require('./classes/Connection.js');
const Logger = require('./classes/Logger.js');
const Player = require('./classes/Player.js');

const INTERRUPTS = ['beforeExit', 'SIGINT', 'SIGTERM'];

main();

async function main() {
    global.reconnects = 0;
    global.logger = new Logger();
    let configPath = path.resolve(process.argv[2] || __dirname + '/config.json');
    try {
        global.config = require(configPath);
        global.logger.setLogLevel(global.config.log?.level);
        global.logger.setTimestamp(global.config.log?.timestamp);
    } catch (err) {
        exit('could not read config file at \'' + configPath + '\'');
    }
    handleExit();
    global.constants = require('./libs/constants.js');
    global.logger.info("launching " + packageJSON.name + " " + packageJSON.version + "...");
    global.player = new Player();
    global.connection = new Connection();
    while (true) {
        try {
            await global.connection.initialize();
            global.reconnects = 0;
        } catch (err) {
            const limit = global.config.reconnect?.limit;
            if (isNaN(limit) || (global.reconnects >= limit && limit > 0)) {
                return exit(err);
            }
            global.logger.error(err);
            const delay = global.config.reconnect?.delay || 1000;
            global.reconnects++;
            global.logger.warn('retry ' + global.reconnects + '/' + limit + " in " + delay + 'ms...');
            await new Promise((resolve, reject) => {
                setTimeout(resolve, delay);
            })
        }
    }
};

function handleExit() {
    for (var index = 0; index < INTERRUPTS.length; index++) {
        process.on(INTERRUPTS[index], (code) => {
            exit(undefined, code);
        });
    }
}

function exit(err, code) {
    if (code === undefined) {
        code = 0;
        if (err !== undefined) {
            code = 1;
        }
    }
    if (err) {
        global.logger.error(err);
        global.logger.error(packageJSON.name + ' ' + packageJSON.version + ' ended due to an error');
    } else {
        global.logger.info(packageJSON.name + ' ' + packageJSON.version + ' shutting down gracefully')
    }
    process.exit(code);
}