Musare/backend/index.js

"use strict";

const util = require("util");

process.env.NODE_CONFIG_DIR = `${__dirname}/config`;

const config = require("config");

process.on("uncaughtException", (err) => {
    if (err.code === "ECONNREFUSED" || err.code === "UNCERTAIN_STATE") return;
    console.log(`UNCAUGHT EXCEPTION: ${err.stack}`);
});

const fancyConsole = config.get("fancyConsole");

// class ModuleManager {
// 	constructor() {
// 		this.modules = {};
// 		this.modulesInitialized = 0;
// 		this.totalModules = 0;
// 		this.modulesLeft = [];
// 		this.i = 0;
// 		this.lockdown = false;
// 		this.fancyConsole = fancyConsole;
// 	}

// 	addModule(moduleName) {
// 		console.log("add module", moduleName);
// 		const moduleClass = new require(`./logic/${moduleName}`);
// 		this.modules[moduleName] = new moduleClass(moduleName, this);
// 		this.totalModules++;
// 		this.modulesLeft.push(moduleName);
// 	}

// 	initialize() {
// 		if (!this.modules["logger"]) return console.error("There is no logger module");
// 		this.logger = this.modules["logger"];
// 		if (this.fancyConsole) {
// 			this.replaceConsoleWithLogger();
// 			this.logger.reservedLines = Object.keys(this.modules).length + 5;
// 		}

// 		for (let moduleName in this.modules) {
// 			let module = this.modules[moduleName];
// 			if (this.lockdown) break;

// 			module._onInitialize().then(() => {
// 				this.moduleInitialized(moduleName);
// 			});

// 			let dependenciesInitializedPromises = [];

// 			module.dependsOn.forEach(dependencyName => {
// 				let dependency = this.modules[dependencyName];
// 				dependenciesInitializedPromises.push(dependency._onInitialize());
// 			});

// 			module.lastTime = Date.now();

// 			Promise.all(dependenciesInitializedPromises).then((res, res2) => {
// 				if (this.lockdown) return;
// 				this.logger.info("MODULE_MANAGER", `${moduleName} dependencies have been completed`);
// 				module._initialize();
// 			});
// 		}
// 	}

// 	async printStatus() {
// 		try { await Promise.race([this.logger._onInitialize(), this.logger._isInitialized()]); } catch { return; }
// 		if (!this.fancyConsole) return;

// 		let colors = this.logger.colors;

// 		const rows = process.stdout.rows;

// 		process.stdout.cursorTo(0, rows - this.logger.reservedLines);
// 		process.stdout.clearScreenDown();

// 		process.stdout.cursorTo(0, (rows - this.logger.reservedLines) + 2);

// 		process.stdout.write(`${colors.FgYellow}Modules${colors.FgWhite}:\n`);

// 		for (let moduleName in this.modules) {
// 			let module = this.modules[moduleName];
// 			let tabsAmount = Math.max(0, Math.ceil(2 - (moduleName.length / 8)));

// 			let tabs = Array(tabsAmount).fill(`\t`).join("");

// 			let timing = module.timeDifferences.map((timeDifference) => {
// 				return `${colors.FgMagenta}${timeDifference}${colors.FgCyan}ms${colors.FgWhite}`;
// 			}).join(", ");

// 			let stateColor;
// 			if (module.state === "NOT_INITIALIZED") stateColor = colors.FgWhite;
// 			else if (module.state === "INITIALIZED") stateColor = colors.FgGreen;
// 			else if (module.state === "LOCKDOWN" && !module.failed) stateColor = colors.FgRed;
// 			else if (module.state === "LOCKDOWN" && module.failed) stateColor = colors.FgMagenta;
// 			else stateColor = colors.FgYellow;

// 			process.stdout.write(`${moduleName}${tabs}${stateColor}${module.state}\t${colors.FgYellow}Stage: ${colors.FgRed}${module.stage}${colors.FgWhite}. ${colors.FgYellow}Timing${colors.FgWhite}: [${timing}]${colors.FgWhite}${colors.FgWhite}. ${colors.FgYellow}Total time${colors.FgWhite}: ${colors.FgRed}${module.totalTimeInitialize}${colors.FgCyan}ms${colors.Reset}\n`);
// 		}
// 	}

// 	moduleInitialized(moduleName) {
// 		this.modulesInitialized++;
// 		this.modulesLeft.splice(this.modulesLeft.indexOf(moduleName), 1);

// 		this.logger.info("MODULE_MANAGER", `Initialized: ${this.modulesInitialized}/${this.totalModules}.`);

// 		if (this.modulesLeft.length === 0) this.allModulesInitialized();
// 	}

// 	allModulesInitialized() {
// 		this.logger.success("MODULE_MANAGER", "All modules have started!");
// 		this.modules["discord"].sendAdminAlertMessage("The backend server started successfully.", "#00AA00", "Startup", false, []);
// 	}

// 	aModuleFailed(failedModule) {
// 		this.logger.error("MODULE_MANAGER", `A module has failed, locking down. Module: ${failedModule.name}`);
// 		this.modules["discord"].sendAdminAlertMessage(`The backend server failed to start due to a failing module: ${failedModule.name}.`, "#AA0000", "Startup", false, []);

// 		this._lockdown();
// 	}

// 	replaceConsoleWithLogger() {
// 		this.oldConsole = {
// 			log: console.log,
// 			debug: console.debug,
// 			info: console.info,
// 			warn: console.warn,
// 			error: console.error
// 		};
// 		console.log = (...args) => this.logger.debug(args.map(arg => util.format(arg)));
// 		console.debug = (...args) => this.logger.debug(args.map(arg => util.format(arg)));
// 		console.info = (...args) => this.logger.debug(args.map(arg => util.format(arg)));
// 		console.warn = (...args) => this.logger.debug(args.map(arg => util.format(arg)));
// 		console.error = (...args) => this.logger.error("CONSOLE", args.map(arg => util.format(arg)));
// 	}

// 	replaceLoggerWithConsole() {
// 		console.log = this.oldConsole.log;
// 		console.debug = this.oldConsole.debug;
// 		console.info = this.oldConsole.info;
// 		console.warn = this.oldConsole.warn;
// 		console.error = this.oldConsole.error;
// 	}

// 	_lockdown() {
// 		this.lockdown = true;

// 		for (let moduleName in this.modules) {
// 			let module = this.modules[moduleName];
// 			if (module.lockdownImmune) continue;
// 			module._lockdown();
// 		}
// 	}
// }

// const moduleManager = new ModuleManager();

// module.exports = moduleManager;

// moduleManager.addModule("cache");
// moduleManager.addModule("db");
// moduleManager.addModule("mail");
// moduleManager.addModule("api");
// moduleManager.addModule("app");
// moduleManager.addModule("discord");
// moduleManager.addModule("io");
// moduleManager.addModule("logger");
// moduleManager.addModule("notifications");
// moduleManager.addModule("activities");
// moduleManager.addModule("playlists");
// moduleManager.addModule("punishments");
// moduleManager.addModule("songs");
// moduleManager.addModule("spotify");
// moduleManager.addModule("stations");
// moduleManager.addModule("tasks");
// moduleManager.addModule("utils");

// moduleManager.initialize();

// process.stdin.on("data", function (data) {
//     if(data.toString() === "lockdown\r\n"){
//         console.log("Locking down.");
//        	moduleManager._lockdown();
//     }
// });

// if (fancyConsole) {
// 	const rows = process.stdout.rows;

// 	for(let i = 0; i < rows; i++) {
// 		process.stdout.write("\n");
// 	}
// }

class ModuleManager {
    constructor() {
        this.modules = {};
        this.modulesNotInitialized = [];
        this.i = 0;
        this.lockdown = false;
        this.fancyConsole = fancyConsole;
    }

    addModule(moduleName) {
        console.log("add module", moduleName);
        const module = require(`./logic/${moduleName}`);
        this.modules[moduleName] = module;
        this.modulesNotInitialized.push(module);
    }

    initialize() {
        // if (!this.modules["logger"]) return console.error("There is no logger module");
        // this.logger = this.modules["logger"];
        // if (this.fancyConsole) {
        // this.replaceConsoleWithLogger();
        this.reservedLines = Object.keys(this.modules).length + 5;
        // }

        for (let moduleName in this.modules) {
            let module = this.modules[moduleName];
            module.setModuleManager(this);

            if (this.lockdown) break;

            module._initialize();

            // let dependenciesInitializedPromises = [];

            // module.dependsOn.forEach(dependencyName => {
            // 	let dependency = this.modules[dependencyName];
            // 	dependenciesInitializedPromises.push(dependency._onInitialize());
            // });

            // module.lastTime = Date.now();

            // Promise.all(dependenciesInitializedPromises).then((res, res2) => {
            // 	if (this.lockdown) return;
            // 	this.logger.info("MODULE_MANAGER", `${moduleName} dependencies have been completed`);
            // 	module._initialize();
            // });
        }
    }

    onInitialize(module) {
        if (this.modulesNotInitialized.indexOf(module) !== -1) {
            this.modulesNotInitialized.splice(
                this.modulesNotInitialized.indexOf(module),
                1
            );

            console.log(
                "MODULE_MANAGER",
                `Initialized: ${Object.keys(this.modules).length -
                    this.modulesNotInitialized.length}/${
                    Object.keys(this.modules).length
                }.`
            );

            if (this.modulesNotInitialized.length === 0)
                this.onAllModulesInitialized();
        }
    }

    onFail(module) {
        if (this.modulesNotInitialized.indexOf(module) !== -1) {
            console.log("A module failed to initialize!");
        }
    }

    onAllModulesInitialized() {
        console.log("All modules initialized!");
        this.modules["discord"].runJob("SEND_ADMIN_ALERT_MESSAGE", {
            message: "The backend server started successfully.",
            color: "#00AA00",
            type: "Startup",
            critical: false,
            extraFields: [],
        });
    }
}

const moduleManager = new ModuleManager();

moduleManager.addModule("cache");
moduleManager.addModule("db");
moduleManager.addModule("mail");
moduleManager.addModule("activities");
moduleManager.addModule("api");
moduleManager.addModule("app");
moduleManager.addModule("discord");
moduleManager.addModule("io");
moduleManager.addModule("notifications");
moduleManager.addModule("playlists");
moduleManager.addModule("punishments");
moduleManager.addModule("songs");
moduleManager.addModule("spotify");
moduleManager.addModule("stations");
moduleManager.addModule("tasks");
moduleManager.addModule("utils");

moduleManager.initialize();

process.stdin.on("data", function(data) {
    if (data.toString() === "lockdown\r\n") {
        console.log("Locking down.");
        moduleManager._lockdown();
    }
    if (data.toString() === "status\r\n") {
        console.log("Status:");

        for (let moduleName in moduleManager.modules) {
            let module = moduleManager.modules[moduleName];
            const tabsNeeded = 4 - Math.ceil((moduleName.length + 1) / 8);
            console.log(
                `${moduleName.toUpperCase()}${Array(tabsNeeded).join(
                    "\t"
                )}${module.getStatus()}. Jobs in queue: ${module.jobQueue.length()}. Jobs in progress: ${module.jobQueue.running()}. Concurrency: ${
                    module.jobQueue.concurrency
                }. Stage: ${module.getStage()}`
            );
        }
        // moduleManager._lockdown();
    }
    if (data.toString().startsWith("running")) {
        const parts = data
            .toString()
            .substr(0, data.toString().length - 2)
            .split(" ");

        console.log(moduleManager.modules[parts[1]].runningJobs);
    }
    if (data.toString().startsWith("stats")) {
        const parts = data
            .toString()
            .substr(0, data.toString().length - 2)
            .split(" ");

        console.log(moduleManager.modules[parts[1]].jobStatistics);
    }
});

module.exports = moduleManager;