feat: added backend, added socket.io to backend and frontend

.gitignore

@@ -1 +1,3 @@
-node_modules
+node_modules
+log/
+default.json

backend/config/template.json

@@ -0,0 +1,3 @@
+{
+	"fancyConsole": true
+}

backend/core.js

@@ -0,0 +1,85 @@
+const EventEmitter = require('events');
+
+const bus = new EventEmitter();
+
+bus.setMaxListeners(1000);
+
+module.exports = class {
+	constructor(name, moduleManager) {
+		this.name = name;
+		this.moduleManager = moduleManager;
+		this.lockdown = false;
+		this.dependsOn = [];
+		this.eventHandlers = [];
+		this.state = "NOT_INITIALIZED";
+		this.stage = 0;
+		this.lastTime = 0;
+		this.totalTimeInitialize = 0;
+		this.timeDifferences = [];
+		this.failed = false;
+	}
+
+	_initialize() {
+		this.logger = this.moduleManager.modules["logger"];
+		this.setState("INITIALIZING");
+
+		this.initialize().then(() => {
+			this.setState("INITIALIZED");
+			this.setStage(0);
+			this.moduleManager.printStatus();
+		}).catch(async (err) => {			
+			this.failed = true;
+
+			this.logger.error(err.stack);
+
+			this.moduleManager.aModuleFailed(this);
+		});
+	}
+
+	_onInitialize() {
+		return new Promise(resolve => bus.once(`stateChange:${this.name}:INITIALIZED`, resolve));
+	}
+
+	_isInitialized() {
+		return new Promise(resolve => {
+			if (this.state === "INITIALIZED") resolve();
+		});
+	}
+
+	_isNotLocked() {
+		return new Promise((resolve, reject) => {
+			if (this.state === "LOCKDOWN") reject();
+			else resolve();
+		});
+	}
+
+	setState(state) {
+		this.state = state;
+		bus.emit(`stateChange:${this.name}:${state}`);
+		this.logger.info(`MODULE_STATE`, `${state}: ${this.name}`);
+	}
+
+	setStage(stage) {
+		if (stage !== 1)
+			this.totalTimeInitialize += (Date.now() - this.lastTime);
+		//this.timeDifferences.push(this.stage + ": " + (Date.now() - this.lastTime) + "ms");
+		this.timeDifferences.push(Date.now() - this.lastTime);
+
+		this.lastTime = Date.now();
+		this.stage = stage;
+		this.moduleManager.printStatus();
+	}
+
+	_validateHook() {
+		return Promise.race([this._onInitialize(), this._isInitialized()]).then(
+			() => this._isNotLocked()
+		);
+	}
+
+	_lockdown() {
+		if (this.lockdown) return;
+		this.lockdown = true;
+		this.setState("LOCKDOWN");
+		this.moduleManager.printStatus();
+	}
+}

backend/index.js

@@ -0,0 +1,180 @@
+'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!");
+	}
+
+	aModuleFailed(failedModule) {
+		this.logger.error("MODULE_MANAGER", `A module has failed, locking down. Module: ${failedModule.name}`);
+
+		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("logger");
+moduleManager.addModule("io");
+
+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");
+	}
+}

backend/logic/io.js

@@ -0,0 +1,61 @@
+'use strict';
+
+// This file contains all the logic for Socket.IO
+
+const coreClass = require("../core");
+
+const async = require("async");
+const config = require("config");
+
+const express = require("express");
+const http = require("http");
+const socketio = require('socket.io');
+
+module.exports = class extends coreClass {
+	/*constructor(name, moduleManager) {
+		super(name, moduleManager);
+
+		//this.dependsOn = ["app", "db", "cache", "utils"];
+	}*/
+
+	initialize() {
+		return new Promise(resolve => {
+			this.setStage(1);
+			
+			const app = express();
+			const server = http.createServer(app);
+			const io = socketio(server);
+
+			this.handlers = {
+				"getAccounts": cb => {
+					cb({
+						accounts: []
+					});
+				}
+			}
+
+			io.on('connection', (socket) => {
+				console.log('a user connected');
+
+				Object.keys(this.handlers).forEach(handlerName => {
+					socket.on(handlerName, (...args) => {
+						let cb = args[args.length - 1];
+						if (typeof cb !== "function")
+							cb = () => {
+								this.logger.info("IO_MODULE", `There was no callback provided for ${name}.`);
+							}
+						else args.pop();
+
+						this.handlers[handlerName].apply(null, [cb].concat(args));
+					});
+				});
+			});
+
+			server.listen(8080, function(){
+				console.log('listening on *:8080');
+
+				resolve();
+			});
+		});
+	}
+}

backend/logic/logger.js

@@ -0,0 +1,164 @@
+'use strict';
+
+const coreClass = require("../core");
+
+const fs = require('fs');
+
+const twoDigits = (num) => {
+	return (num < 10) ? '0' + num : num;
+};
+
+const getTime = () => {
+	let time = new Date();
+	return {
+		year: time.getFullYear(),
+		month: time.getMonth() + 1,
+		day: time.getDate(),
+		hour: time.getHours(),
+		minute: time.getMinutes(),
+		second: time.getSeconds()
+	}
+};
+
+const getTimeFormatted = () => {
+	let time = getTime();
+	return `${time.year}-${twoDigits(time.month)}-${twoDigits(time.day)} ${twoDigits(time.hour)}:${twoDigits(time.minute)}:${twoDigits(time.second)}`;
+}
+
+module.exports = class extends coreClass {
+	constructor(name, moduleManager) {
+		super(name, moduleManager);
+		this.lockdownImmune = true;
+	}
+
+	initialize() {
+		return new Promise((resolve, reject) => {
+			this.setStage(1);
+
+			this.configDirectory = `${__dirname}/../../log`;
+
+			if (!fs.existsSync(`${this.configDirectory}`))
+				fs.mkdirSync(this.configDirectory);
+
+			let time = getTimeFormatted();
+
+			this.logCbs = [];
+
+			this.colors = {
+				Reset: "\x1b[0m",
+				Bright: "\x1b[1m",
+				Dim: "\x1b[2m",
+				Underscore: "\x1b[4m",
+				Blink: "\x1b[5m",
+				Reverse: "\x1b[7m",
+				Hidden: "\x1b[8m",
+
+				FgBlack: "\x1b[30m",
+				FgRed: "\x1b[31m",
+				FgGreen: "\x1b[32m",
+				FgYellow: "\x1b[33m",
+				FgBlue: "\x1b[34m",
+				FgMagenta: "\x1b[35m",
+				FgCyan: "\x1b[36m",
+				FgWhite: "\x1b[37m",
+
+				BgBlack: "\x1b[40m",
+				BgRed: "\x1b[41m",
+				BgGreen: "\x1b[42m",
+				BgYellow: "\x1b[43m",
+				BgBlue: "\x1b[44m",
+				BgMagenta: "\x1b[45m",
+				BgCyan: "\x1b[46m",
+				BgWhite: "\x1b[47m"
+			};
+
+			fs.appendFile(this.configDirectory + '/all.log', `${time} BACKEND_RESTARTED\n`, ()=>{});
+			fs.appendFile(this.configDirectory + '/success.log', `${time} BACKEND_RESTARTED\n`, ()=>{});
+			fs.appendFile(this.configDirectory + '/error.log', `${time} BACKEND_RESTARTED\n`, ()=>{});
+			fs.appendFile(this.configDirectory + '/info.log', `${time} BACKEND_RESTARTED\n`, ()=>{});
+
+			if (this.moduleManager.fancyConsole) {
+				process.stdout.write(Array(this.reservedLines).fill(`\n`).join(""));
+			}
+
+			resolve();
+		});
+	}
+
+	async success(type, text, display = true) {
+		try { await this._validateHook(); } catch { return; }
+
+		const time = getTimeFormatted();
+		const message = `${time} SUCCESS - ${type} - ${text}`;
+
+		this.writeFile('all.log', message);
+		this.writeFile('success.log', message);
+
+		if (display) this.log(this.colors.FgGreen, message);
+	}
+
+	async error(type, text, display = true) {
+		try { await this._validateHook(); } catch { return; }
+
+		const time = getTimeFormatted();
+		const message = `${time} ERROR - ${type} - ${text}`;
+
+		this.writeFile('all.log', message);
+		this.writeFile('error.log', message);
+
+		if (display) this.log(this.colors.FgRed, message);
+	}
+
+	async info(type, text, display = true) {
+		try { await this._validateHook(); } catch { return; }
+
+		const time = getTimeFormatted();
+		const message = `${time} INFO - ${type} - ${text}`;
+
+		this.writeFile('all.log', message);
+		this.writeFile('info.log', message);
+		if (display) this.log(this.colors.FgCyan, message);
+	}
+
+	async debug(text, display = true) {
+		try { await this._validateHook(); } catch { return; }
+
+		const time = getTimeFormatted();
+		const message = `${time} DEBUG - ${text}`;
+
+		if (display) this.log(this.colors.FgMagenta, message);
+	}
+
+	log(color, message) {
+		if (this.moduleManager.fancyConsole) {
+			const rows = process.stdout.rows;
+			const columns = process.stdout.columns;
+			const lineNumber = rows - this.reservedLines;
+
+			
+			let lines = 0;
+			
+			message.split("\n").forEach((line) => {
+				lines += Math.floor(line.replace("\t", "    ").length / columns) + 1;
+			});
+
+			if (lines > this.logger.reservedLines)
+				lines = this.logger.reservedLines;
+
+			process.stdout.cursorTo(0, rows - this.logger.reservedLines);
+			process.stdout.clearScreenDown();
+
+			process.stdout.cursorTo(0, lineNumber);
+			process.stdout.write(`${color}${message}${this.colors.Reset}\n`);
+
+			process.stdout.cursorTo(0, process.stdout.rows);
+			process.stdout.write(Array(lines).fill(`\n!`).join(""));
+
+			this.moduleManager.printStatus();
+		} else console.log(`${color}${message}${this.colors.Reset}`);
+	}
+
+	writeFile(fileName, message) {
+		fs.appendFile(`${this.configDirectory}/${fileName}`, `${message}\n`, ()=>{});
+	}
+}

backend/package.json

@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "async": "^3.1.0",
+    "config": "^3.2.2",
+    "express": "^4.17.1",
+    "socket.io": "^2.3.0"
+  }
+}

backend/yarn.lock

@@ -0,0 +1,643 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+accepts@~1.3.4, accepts@~1.3.7:
+  version "1.3.7"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.7.tgz#531bc726517a3b2b41f850021c6cc15eaab507cd"
+  integrity sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==
+  dependencies:
+    mime-types "~2.1.24"
+    negotiator "0.6.2"
+
+after@0.8.2:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/after/-/after-0.8.2.tgz#fedb394f9f0e02aa9768e702bda23b505fae7e1f"
+  integrity sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=
+
+array-flatten@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/array-flatten/-/array-flatten-1.1.1.tgz#9a5f699051b1e7073328f2a008968b64ea2955d2"
+  integrity sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=
+
+arraybuffer.slice@~0.0.7:
+  version "0.0.7"
+  resolved "https://registry.yarnpkg.com/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz#3bbc4275dd584cc1b10809b89d4e8b63a69e7675"
+  integrity sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog==
+
+async-limiter@^1.0.0, async-limiter@~1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
+  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
+
+async@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/async/-/async-3.1.0.tgz#42b3b12ae1b74927b5217d8c0016baaf62463772"
+  integrity sha512-4vx/aaY6j/j3Lw3fbCHNWP0pPaTCew3F6F3hYyl/tHs/ndmV1q7NW9T5yuJ2XAGwdQrP+6Wu20x06U4APo/iQQ==
+
+backo2@1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/backo2/-/backo2-1.0.2.tgz#31ab1ac8b129363463e35b3ebb69f4dfcfba7947"
+  integrity sha1-MasayLEpNjRj41s+u2n038+6eUc=
+
+base64-arraybuffer@0.1.5:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz#73926771923b5a19747ad666aa5cd4bf9c6e9ce8"
+  integrity sha1-c5JncZI7Whl0etZmqlzUv5xunOg=
+
+base64id@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/base64id/-/base64id-2.0.0.tgz#2770ac6bc47d312af97a8bf9a634342e0cd25cb6"
+  integrity sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog==
+
+better-assert@~1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/better-assert/-/better-assert-1.0.2.tgz#40866b9e1b9e0b55b481894311e68faffaebc522"
+  integrity sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=
+  dependencies:
+    callsite "1.0.0"
+
+blob@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/blob/-/blob-0.0.5.tgz#d680eeef25f8cd91ad533f5b01eed48e64caf683"
+  integrity sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig==
+
+body-parser@1.19.0:
+  version "1.19.0"
+  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"
+  integrity sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==
+  dependencies:
+    bytes "3.1.0"
+    content-type "~1.0.4"
+    debug "2.6.9"
+    depd "~1.1.2"
+    http-errors "1.7.2"
+    iconv-lite "0.4.24"
+    on-finished "~2.3.0"
+    qs "6.7.0"
+    raw-body "2.4.0"
+    type-is "~1.6.17"
+
+bytes@3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
+  integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
+
+callsite@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/callsite/-/callsite-1.0.0.tgz#280398e5d664bd74038b6f0905153e6e8af1bc20"
+  integrity sha1-KAOY5dZkvXQDi28JBRU+borxvCA=
+
+component-bind@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/component-bind/-/component-bind-1.0.0.tgz#00c608ab7dcd93897c0009651b1d3a8e1e73bbd1"
+  integrity sha1-AMYIq33Nk4l8AAllGx06jh5zu9E=
+
+component-emitter@1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
+  integrity sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=
+
+component-inherit@0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/component-inherit/-/component-inherit-0.0.3.tgz#645fc4adf58b72b649d5cae65135619db26ff143"
+  integrity sha1-ZF/ErfWLcrZJ1crmUTVhnbJv8UM=
+
+config@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/config/-/config-3.2.2.tgz#c7d31bb2a9d30013a905ff420101e3b1ba58eead"
+  integrity sha512-rOsfIOAcG82AWouK4/vBS/OKz3UPl2T/kP0irExmXJJOoWg2CmdfPLdx56bCoMUMFNh+7soQkQWCUC8DyemiwQ==
+  dependencies:
+    json5 "^1.0.1"
+
+content-disposition@0.5.3:
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.3.tgz#e130caf7e7279087c5616c2007d0485698984fbd"
+  integrity sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==
+  dependencies:
+    safe-buffer "5.1.2"
+
+content-type@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
+  integrity sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==
+
+cookie-signature@1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"
+  integrity sha1-4wOogrNCzD7oylE6eZmXNNqzriw=
+
+cookie@0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
+  integrity sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=
+
+cookie@0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.0.tgz#beb437e7022b3b6d49019d088665303ebe9c14ba"
+  integrity sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==
+
+debug@2.6.9:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
+  integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
+  dependencies:
+    ms "2.0.0"
+
+debug@~3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
+  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
+  dependencies:
+    ms "2.0.0"
+
+debug@~4.1.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+  dependencies:
+    ms "^2.1.1"
+
+depd@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
+  integrity sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=
+
+destroy@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/destroy/-/destroy-1.0.4.tgz#978857442c44749e4206613e37946205826abd80"
+  integrity sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=
+
+ee-first@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
+  integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
+
+encodeurl@~1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
+  integrity sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=
+
+engine.io-client@~3.4.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/engine.io-client/-/engine.io-client-3.4.0.tgz#82a642b42862a9b3f7a188f41776b2deab643700"
+  integrity sha512-a4J5QO2k99CM2a0b12IznnyQndoEvtA4UAldhGzKqnHf42I3Qs2W5SPnDvatZRcMaNZs4IevVicBPayxYt6FwA==
+  dependencies:
+    component-emitter "1.2.1"
+    component-inherit "0.0.3"
+    debug "~4.1.0"
+    engine.io-parser "~2.2.0"
+    has-cors "1.1.0"
+    indexof "0.0.1"
+    parseqs "0.0.5"
+    parseuri "0.0.5"
+    ws "~6.1.0"
+    xmlhttprequest-ssl "~1.5.4"
+    yeast "0.1.2"
+
+engine.io-parser@~2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/engine.io-parser/-/engine.io-parser-2.2.0.tgz#312c4894f57d52a02b420868da7b5c1c84af80ed"
+  integrity sha512-6I3qD9iUxotsC5HEMuuGsKA0cXerGz+4uGcXQEkfBidgKf0amsjrrtwcbwK/nzpZBxclXlV7gGl9dgWvu4LF6w==
+  dependencies:
+    after "0.8.2"
+    arraybuffer.slice "~0.0.7"
+    base64-arraybuffer "0.1.5"
+    blob "0.0.5"
+    has-binary2 "~1.0.2"
+
+engine.io@~3.4.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/engine.io/-/engine.io-3.4.0.tgz#3a962cc4535928c252759a00f98519cb46c53ff3"
+  integrity sha512-XCyYVWzcHnK5cMz7G4VTu2W7zJS7SM1QkcelghyIk/FmobWBtXE7fwhBusEKvCSqc3bMh8fNFMlUkCKTFRxH2w==
+  dependencies:
+    accepts "~1.3.4"
+    base64id "2.0.0"
+    cookie "0.3.1"
+    debug "~4.1.0"
+    engine.io-parser "~2.2.0"
+    ws "^7.1.2"
+
+escape-html@~1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
+  integrity sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=
+
+etag@~1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
+  integrity sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
+
+express@^4.17.1:
+  version "4.17.1"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.17.1.tgz#4491fc38605cf51f8629d39c2b5d026f98a4c134"
+  integrity sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==
+  dependencies:
+    accepts "~1.3.7"
+    array-flatten "1.1.1"
+    body-parser "1.19.0"
+    content-disposition "0.5.3"
+    content-type "~1.0.4"
+    cookie "0.4.0"
+    cookie-signature "1.0.6"
+    debug "2.6.9"
+    depd "~1.1.2"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    etag "~1.8.1"
+    finalhandler "~1.1.2"
+    fresh "0.5.2"
+    merge-descriptors "1.0.1"
+    methods "~1.1.2"
+    on-finished "~2.3.0"
+    parseurl "~1.3.3"
+    path-to-regexp "0.1.7"
+    proxy-addr "~2.0.5"
+    qs "6.7.0"
+    range-parser "~1.2.1"
+    safe-buffer "5.1.2"
+    send "0.17.1"
+    serve-static "1.14.1"
+    setprototypeof "1.1.1"
+    statuses "~1.5.0"
+    type-is "~1.6.18"
+    utils-merge "1.0.1"
+    vary "~1.1.2"
+
+finalhandler@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.1.2.tgz#b7e7d000ffd11938d0fdb053506f6ebabe9f587d"
+  integrity sha512-aAWcW57uxVNrQZqFXjITpW3sIUQmHGG3qSb9mUah9MgMC4NeWhNOlNjXEYq3HjRAvL6arUviZGGJsBg6z0zsWA==
+  dependencies:
+    debug "2.6.9"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    on-finished "~2.3.0"
+    parseurl "~1.3.3"
+    statuses "~1.5.0"
+    unpipe "~1.0.0"
+
+forwarded@~0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.2.tgz#98c23dab1175657b8c0573e8ceccd91b0ff18c84"
+  integrity sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ=
+
+fresh@0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
+  integrity sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=
+
+has-binary2@~1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has-binary2/-/has-binary2-1.0.3.tgz#7776ac627f3ea77250cfc332dab7ddf5e4f5d11d"
+  integrity sha512-G1LWKhDSvhGeAQ8mPVQlqNcOB2sJdwATtZKl2pDKKHfpf/rYj24lkinxf69blJbnsvtqqNU+L3SL50vzZhXOnw==
+  dependencies:
+    isarray "2.0.1"
+
+has-cors@1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/has-cors/-/has-cors-1.1.0.tgz#5e474793f7ea9843d1bb99c23eef49ff126fff39"
+  integrity sha1-XkdHk/fqmEPRu5nCPu9J/xJv/zk=
+
+http-errors@1.7.2:
+  version "1.7.2"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.7.2.tgz#4f5029cf13239f31036e5b2e55292bcfbcc85c8f"
+  integrity sha512-uUQBt3H/cSIVfch6i1EuPNy/YsRSOUBXTVfZ+yR7Zjez3qjBz6i9+i4zjNaoqcoFVI4lQJ5plg63TvGfRSDCRg==
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.3"
+    setprototypeof "1.1.1"
+    statuses ">= 1.5.0 < 2"
+    toidentifier "1.0.0"
+
+http-errors@~1.7.2:
+  version "1.7.3"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.7.3.tgz#6c619e4f9c60308c38519498c14fbb10aacebb06"
+  integrity sha512-ZTTX0MWrsQ2ZAhA1cejAwDLycFsd7I7nVtnkT3Ol0aqodaKW+0CTZDQ1uBv5whptCnc8e8HeRRJxRs0kmm/Qfw==
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.4"
+    setprototypeof "1.1.1"
+    statuses ">= 1.5.0 < 2"
+    toidentifier "1.0.0"
+
+iconv-lite@0.4.24:
+  version "0.4.24"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
+  integrity sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3"
+
+indexof@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/indexof/-/indexof-0.0.1.tgz#82dc336d232b9062179d05ab3293a66059fd435d"
+  integrity sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10=
+
+inherits@2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
+
+inherits@2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
+
+ipaddr.js@1.9.0:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.9.0.tgz#37df74e430a0e47550fe54a2defe30d8acd95f65"
+  integrity sha512-M4Sjn6N/+O6/IXSJseKqHoFc+5FdGJ22sXqnjTpdZweHK64MzEPAyQZyEU3R/KRv2GLoa7nNtg/C2Ev6m7z+eA==
+
+isarray@2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-2.0.1.tgz#a37d94ed9cda2d59865c9f76fe596ee1f338741e"
+  integrity sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4=
+
+json5@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-1.0.1.tgz#779fb0018604fa854eacbf6252180d83543e3dbe"
+  integrity sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==
+  dependencies:
+    minimist "^1.2.0"
+
+media-typer@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
+  integrity sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=
+
+merge-descriptors@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/merge-descriptors/-/merge-descriptors-1.0.1.tgz#b00aaa556dd8b44568150ec9d1b953f3f90cbb61"
+  integrity sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E=
+
+methods@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/methods/-/methods-1.1.2.tgz#5529a4d67654134edcc5266656835b0f851afcee"
+  integrity sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4=
+
+mime-db@1.40.0:
+  version "1.40.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.40.0.tgz#a65057e998db090f732a68f6c276d387d4126c32"
+  integrity sha512-jYdeOMPy9vnxEqFRRo6ZvTZ8d9oPb+k18PKoYNYUe2stVEBPPwsln/qWzdbmaIvnhZ9v2P+CuecK+fpUfsV2mA==
+
+mime-types@~2.1.24:
+  version "2.1.24"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.24.tgz#b6f8d0b3e951efb77dedeca194cff6d16f676f81"
+  integrity sha512-WaFHS3MCl5fapm3oLxU4eYDw77IQM2ACcxQ9RIxfaC3ooc6PFuBMGZZsYpvoXS5D5QTWPieo1jjLdAm3TBP3cQ==
+  dependencies:
+    mime-db "1.40.0"
+
+mime@1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+  integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
+
+minimist@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
+  integrity sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=
+
+ms@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+  integrity sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=
+
+ms@2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
+  integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
+
+ms@^2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+  integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
+
+negotiator@0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.2.tgz#feacf7ccf525a77ae9634436a64883ffeca346fb"
+  integrity sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw==
+
+object-component@0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/object-component/-/object-component-0.0.3.tgz#f0c69aa50efc95b866c186f400a33769cb2f1291"
+  integrity sha1-8MaapQ78lbhmwYb0AKM3acsvEpE=
+
+on-finished@~2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"
+  integrity sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=
+  dependencies:
+    ee-first "1.1.1"
+
+parseqs@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/parseqs/-/parseqs-0.0.5.tgz#d5208a3738e46766e291ba2ea173684921a8b89d"
+  integrity sha1-1SCKNzjkZ2bikbouoXNoSSGouJ0=
+  dependencies:
+    better-assert "~1.0.0"
+
+parseuri@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/parseuri/-/parseuri-0.0.5.tgz#80204a50d4dbb779bfdc6ebe2778d90e4bce320a"
+  integrity sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=
+  dependencies:
+    better-assert "~1.0.0"
+
+parseurl@~1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
+  integrity sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ==
+
+path-to-regexp@0.1.7:
+  version "0.1.7"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
+  integrity sha1-32BBeABfUi8V60SQ5yR6G/qmf4w=
+
+proxy-addr@~2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.5.tgz#34cbd64a2d81f4b1fd21e76f9f06c8a45299ee34"
+  integrity sha512-t/7RxHXPH6cJtP0pRG6smSr9QJidhB+3kXu0KgXnbGYMgzEnUxRQ4/LDdfOwZEMyIh3/xHb8PX3t+lfL9z+YVQ==
+  dependencies:
+    forwarded "~0.1.2"
+    ipaddr.js "1.9.0"
+
+qs@6.7.0:
+  version "6.7.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.7.0.tgz#41dc1a015e3d581f1621776be31afb2876a9b1bc"
+  integrity sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ==
+
+range-parser@~1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
+  integrity sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==
+
+raw-body@2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.4.0.tgz#a1ce6fb9c9bc356ca52e89256ab59059e13d0332"
+  integrity sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==
+  dependencies:
+    bytes "3.1.0"
+    http-errors "1.7.2"
+    iconv-lite "0.4.24"
+    unpipe "1.0.0"
+
+safe-buffer@5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+
+"safer-buffer@>= 2.1.2 < 3":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+  integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
+
+send@0.17.1:
+  version "0.17.1"
+  resolved "https://registry.yarnpkg.com/send/-/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"
+  integrity sha512-BsVKsiGcQMFwT8UxypobUKyv7irCNRHk1T0G680vk88yf6LBByGcZJOTJCrTP2xVN6yI+XjPJcNuE3V4fT9sAg==
+  dependencies:
+    debug "2.6.9"
+    depd "~1.1.2"
+    destroy "~1.0.4"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    etag "~1.8.1"
+    fresh "0.5.2"
+    http-errors "~1.7.2"
+    mime "1.6.0"
+    ms "2.1.1"
+    on-finished "~2.3.0"
+    range-parser "~1.2.1"
+    statuses "~1.5.0"
+
+serve-static@1.14.1:
+  version "1.14.1"
+  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-1.14.1.tgz#666e636dc4f010f7ef29970a88a674320898b2f9"
+  integrity sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==
+  dependencies:
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    parseurl "~1.3.3"
+    send "0.17.1"
+
+setprototypeof@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.1.tgz#7e95acb24aa92f5885e0abef5ba131330d4ae683"
+  integrity sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==
+
+socket.io-adapter@~1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/socket.io-adapter/-/socket.io-adapter-1.1.1.tgz#2a805e8a14d6372124dd9159ad4502f8cb07f06b"
+  integrity sha1-KoBeihTWNyEk3ZFZrUUC+MsH8Gs=
+
+socket.io-client@2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/socket.io-client/-/socket.io-client-2.3.0.tgz#14d5ba2e00b9bcd145ae443ab96b3f86cbcc1bb4"
+  integrity sha512-cEQQf24gET3rfhxZ2jJ5xzAOo/xhZwK+mOqtGRg5IowZsMgwvHwnf/mCRapAAkadhM26y+iydgwsXGObBB5ZdA==
+  dependencies:
+    backo2 "1.0.2"
+    base64-arraybuffer "0.1.5"
+    component-bind "1.0.0"
+    component-emitter "1.2.1"
+    debug "~4.1.0"
+    engine.io-client "~3.4.0"
+    has-binary2 "~1.0.2"
+    has-cors "1.1.0"
+    indexof "0.0.1"
+    object-component "0.0.3"
+    parseqs "0.0.5"
+    parseuri "0.0.5"
+    socket.io-parser "~3.3.0"
+    to-array "0.1.4"
+
+socket.io-parser@~3.3.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.3.0.tgz#2b52a96a509fdf31440ba40fed6094c7d4f1262f"
+  integrity sha512-hczmV6bDgdaEbVqhAeVMM/jfUfzuEZHsQg6eOmLgJht6G3mPKMxYm75w2+qhAQZ+4X+1+ATZ+QFKeOZD5riHng==
+  dependencies:
+    component-emitter "1.2.1"
+    debug "~3.1.0"
+    isarray "2.0.1"
+
+socket.io-parser@~3.4.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.4.0.tgz#370bb4a151df2f77ce3345ff55a7072cc6e9565a"
+  integrity sha512-/G/VOI+3DBp0+DJKW4KesGnQkQPFmUCbA/oO2QGT6CWxU7hLGWqU3tyuzeSK/dqcyeHsQg1vTe9jiZI8GU9SCQ==
+  dependencies:
+    component-emitter "1.2.1"
+    debug "~4.1.0"
+    isarray "2.0.1"
+
+socket.io@^2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-2.3.0.tgz#cd762ed6a4faeca59bc1f3e243c0969311eb73fb"
+  integrity sha512-2A892lrj0GcgR/9Qk81EaY2gYhCBxurV0PfmmESO6p27QPrUK1J3zdns+5QPqvUYK2q657nSj0guoIil9+7eFg==
+  dependencies:
+    debug "~4.1.0"
+    engine.io "~3.4.0"
+    has-binary2 "~1.0.2"
+    socket.io-adapter "~1.1.0"
+    socket.io-client "2.3.0"
+    socket.io-parser "~3.4.0"
+
+"statuses@>= 1.5.0 < 2", statuses@~1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
+  integrity sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
+
+to-array@0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/to-array/-/to-array-0.1.4.tgz#17e6c11f73dd4f3d74cda7a4ff3238e9ad9bf890"
+  integrity sha1-F+bBH3PdTz10zaek/zI46a2b+JA=
+
+toidentifier@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
+  integrity sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==
+
+type-is@~1.6.17, type-is@~1.6.18:
+  version "1.6.18"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
+  integrity sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==
+  dependencies:
+    media-typer "0.3.0"
+    mime-types "~2.1.24"
+
+unpipe@1.0.0, unpipe@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
+  integrity sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=
+
+utils-merge@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
+  integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
+
+vary@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
+  integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=
+
+ws@^7.1.2:
+  version "7.1.2"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.1.2.tgz#c672d1629de8bb27a9699eb599be47aeeedd8f73"
+  integrity sha512-gftXq3XI81cJCgkUiAVixA0raD9IVmXqsylCrjRygw4+UOOGzPoxnQ6r/CnVL9i+mDncJo94tSkyrtuuQVBmrg==
+  dependencies:
+    async-limiter "^1.0.0"
+
+ws@~6.1.0:
+  version "6.1.4"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-6.1.4.tgz#5b5c8800afab925e94ccb29d153c8d02c1776ef9"
+  integrity sha512-eqZfL+NE/YQc1/ZynhojeV8q+H050oR8AZ2uIev7RU10svA9ZnJUddHcOUZTJLinZ9yEfdA2kSATS2qZK5fhJA==
+  dependencies:
+    async-limiter "~1.0.0"
+
+xmlhttprequest-ssl@~1.5.4:
+  version "1.5.5"
+  resolved "https://registry.yarnpkg.com/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz#c2876b06168aadc40e57d97e81191ac8f4398b3e"
+  integrity sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=
+
+yeast@0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/yeast/-/yeast-0.1.2.tgz#008e06d8094320c372dbc2f8ed76a0ca6c8ac419"
+  integrity sha1-AI4G2AlDIMNy28L47XagymyKxBk=

frontend/dist/index.tpl.html

@@ -5,6 +5,8 @@
 
     <!--script src="https://code.jquery.com/jquery-3.4.1.min.js"></script-->
 
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.dev.js" integrity="sha256-OgiHfllOBEOiWQ2OcBsDncRG2k7QBW9Rs1dB7MH2N2s=" crossorigin="anonymous"></script>
+
     <link href='https://fonts.googleapis.com/css?family=Roboto:100,400|Pacifico' rel='stylesheet'>
     <link href='https://fonts.googleapis.com/icon?family=Material+Icons' rel='stylesheet'>
 </head>

frontend/io.js

@@ -0,0 +1,92 @@
+const callbacks = {
+	general: {
+		temp: [],
+		persist: []
+	},
+	onConnect: {
+		temp: [],
+		persist: []
+	},
+	onDisconnect: {
+		temp: [],
+		persist: []
+	},
+	onConnectError: {
+		temp: [],
+		persist: []
+	}
+};
+
+export default {
+	ready: false,
+
+	socket: null,
+
+	getSocket(...args) {
+		if (args[0] === true) {
+			if (this.ready) args[1](this.socket);
+			else callbacks.general.persist.push(args[1]);
+		} else if (this.ready) args[0](this.socket);
+		else callbacks.general.temp.push(args[0]);
+	},
+
+	onConnect(...args) {
+		if (args[0] === true) callbacks.onConnect.persist.push(args[1]);
+		else callbacks.onConnect.temp.push(args[0]);
+	},
+
+	onDisconnect(...args) {
+		if (args[0] === true) callbacks.onDisconnect.persist.push(args[1]);
+		else callbacks.onDisconnect.temp.push(args[0]);
+	},
+
+	onConnectError(...args) {
+		if (args[0] === true) callbacks.onDisconnect.persist.push(args[1]);
+		else callbacks.onConnectError.temp.push(args[0]);
+	},
+
+	clear: () => {
+		Object.keys(callbacks).forEach(type => {
+			callbacks[type].temp = [];
+		});
+	},
+
+	removeAllListeners() {
+		Object.keys(this.socket._callbacks).forEach(id => {
+			if (
+				id.indexOf("$event:") !== -1 &&
+				id.indexOf("$event:keep.") === -1
+			)
+				delete this.socket._callbacks[id];
+		});
+	},
+
+	init(url) {
+		this.socket = window.socket = io(url);
+
+		this.socket.on("connect", () => {
+			callbacks.onConnect.temp.forEach(cb => cb());
+			callbacks.onConnect.persist.forEach(cb => cb());
+		});
+
+		this.socket.on("disconnect", () => {
+			console.log("IO: SOCKET DISCONNECTED");
+			callbacks.onDisconnect.temp.forEach(cb => cb());
+			callbacks.onDisconnect.persist.forEach(cb => cb());
+		});
+
+		this.socket.on("connect_error", () => {
+			console.log("IO: SOCKET CONNECT ERROR");
+			callbacks.onConnectError.temp.forEach(cb => cb());
+			callbacks.onConnectError.persist.forEach(cb => cb());
+		});
+
+		this.ready = true;
+
+		callbacks.general.temp.forEach(callback => callback(this.socket));
+		callbacks.general.persist.forEach(callback => callback(this.socket));
+
+		callbacks.general.temp = [];
+		callbacks.general.persist = [];
+	}
+};

frontend/main.js

@@ -4,6 +4,8 @@ import VueRouter from "vue-router";
 
 import App from "./vue/App.vue";
 
+import io from "./io.js";
+
 Vue.use(VueRouter);
 
 const router = new VueRouter({
@@ -16,6 +18,8 @@ const router = new VueRouter({
 	]
 });
 
+io.init("http://localhost:8080");
+
 new Vue({
 	router,
 	el: "#root",

frontend/vue/pages/Homepage.vue

@@ -16,6 +16,8 @@
 <script>
 import Field from '../components/Field.vue';
 
+import io from "../../io.js";
+
 export default {
 	components: { Field },
 	data: () => {
@@ -110,13 +112,20 @@ export default {
 					]
 				}
 			],
+			accounts: []
 		}
 	},
 	methods: {
 		
 	},
 	mounted() {
-		
+		io.getSocket(socket => {
+			this.socket = socket;
+
+			socket.emit("getAccounts", res => {
+				this.accounts = res.accounts;
+			});
+		});
 	}
 };
 </script>