Add many eslint rules and fix all linting issues

.eslintrc.json

@@ -4,15 +4,106 @@
   "plugins": [
     "@typescript-eslint"
   ],
+  "parserOptions": {
+    "project": [
+      "./tsconfig.json",
+      "./tsconfig.test.json"
+    ]
+  },
   "extends": [
     "eslint:recommended",
     "plugin:@typescript-eslint/recommended"
   ],
   "rules": {
-    "@typescript-eslint/no-inferrable-types": 0
+    "indent": [
+      "error",
+      4,
+      {
+        "SwitchCase": 1
+      }
+    ],
+    "no-trailing-spaces": "error",
+    "max-len": [
+      "error",
+      {
+        "code": 120,
+        "ignoreTemplateLiterals": true,
+        "ignoreRegExpLiterals": true
+      }
+    ],
+    "semi": "off",
+    "@typescript-eslint/semi": [
+      "error"
+    ],
+    "no-extra-semi": "error",
+    "eol-last": "error",
+    "comma-dangle": "off",
+    "@typescript-eslint/comma-dangle": [
+      "error",
+      {
+        "arrays": "always-multiline",
+        "objects": "always-multiline",
+        "imports": "always-multiline",
+        "exports": "always-multiline",
+        "functions": "always-multiline",
+        "enums": "always-multiline",
+        "generics": "always-multiline",
+        "tuples": "always-multiline"
+      }
+    ],
+    "no-extra-parens": "off",
+    "@typescript-eslint/no-extra-parens": [
+      "error"
+    ],
+    "no-nested-ternary": "error",
+    "@typescript-eslint/no-inferrable-types": "off",
+    "@typescript-eslint/explicit-module-boundary-types": "error",
+    "@typescript-eslint/no-unnecessary-condition": "error",
+    "@typescript-eslint/no-unused-vars": [
+      "error",
+      {
+        "argsIgnorePattern": "^_"
+      }
+    ],
+    "@typescript-eslint/no-non-null-assertion": "error",
+    "no-useless-return": "error",
+    "no-useless-constructor": "off",
+    "@typescript-eslint/no-useless-constructor": [
+      "error"
+    ],
+    "no-return-await": "off",
+    "@typescript-eslint/return-await": [
+      "error",
+      "always"
+    ],
+    "@typescript-eslint/explicit-member-accessibility": [
+      "error",
+      {
+        "accessibility": "explicit"
+      }
+    ]
   },
   "ignorePatterns": [
     "jest.config.js",
-    "dist/**/*"
+    "dist/**/*",
+    "config/**/*"
+  ],
+  "overrides": [
+    {
+      "files": [
+        "test/**/*"
+      ],
+      "rules": {
+        "max-len": [
+          "error",
+          {
+            "code": 120,
+            "ignoreTemplateLiterals": true,
+            "ignoreRegExpLiterals": true,
+            "ignoreStrings": true
+          }
+        ]
+      }
+    }
   ]
 }

jest.config.js

@@ -1,4 +1,9 @@
 module.exports = {
+    globals: {
+        'ts-jest': {
+            tsconfig: 'tsconfig.test.json',
+        }
+    },
     transform: {
         "^.+\\.ts$": "ts-jest"
     },
@@ -10,5 +15,5 @@ module.exports = {
     testMatch: [
         '**/test/**/*.test.ts'
     ],
-    testEnvironment: 'node'
+    testEnvironment: 'node',
 };

src/Application.ts

@@ -6,7 +6,7 @@ import WebSocketListener from "./WebSocketListener";
 import ApplicationComponent from "./ApplicationComponent";
 import Controller from "./Controller";
 import MysqlConnectionManager from "./db/MysqlConnectionManager";
-import Migration from "./db/Migration";
+import Migration, {MigrationType} from "./db/Migration";
 import {Type} from "./Utils";
 import LogRequestsComponent from "./components/LogRequestsComponent";
 import {ValidationBag} from "./db/Validator";
@@ -19,7 +19,7 @@ import RedisComponent from "./components/RedisComponent";
 import Extendable from "./Extendable";
 import TemplateError = lib.TemplateError;
 
-export default abstract class Application implements Extendable<ApplicationComponent> {
+export default abstract class Application implements Extendable<ApplicationComponent | WebSocketListener<Application>> {
     private readonly version: string;
     private readonly ignoreCommandLine: boolean;
     private readonly controllers: Controller[] = [];
@@ -34,11 +34,11 @@ export default abstract class Application implements Extendable<ApplicationCompo
         this.ignoreCommandLine = ignoreCommandLine;
     }
 
-    protected abstract getMigrations(): Type<Migration>[];
+    protected abstract getMigrations(): MigrationType<Migration>[];
 
     protected abstract async init(): Promise<void>;
 
-    protected use(thing: Controller | WebSocketListener<this> | ApplicationComponent) {
+    protected use(thing: Controller | WebSocketListener<this> | ApplicationComponent): void {
         if (thing instanceof Controller) {
             thing.setApp(this);
             this.controllers.push(thing);
@@ -88,7 +88,7 @@ export default abstract class Application implements Extendable<ApplicationCompo
         app.use(handleRouter);
 
         // Error handlers
-        app.use((err: any, req: Request, res: Response, next: NextFunction) => {
+        app.use((err: unknown, req: Request, res: Response, next: NextFunction) => {
             if (res.headersSent) return next(err);
 
             if (err instanceof ValidationBag) {
@@ -104,17 +104,18 @@ export default abstract class Application implements Extendable<ApplicationCompo
                     },
                     text: () => {
                         res.status(401);
-                        res.send('Error: ' + err.getMessages())
+                        res.send('Error: ' + err.getMessages());
                     },
                     html: () => {
-                        req.flash('validation', err.getMessages());
+                        req.flash('validation', err.getMessages().toString());
                         res.redirectBack();
                     },
                 });
                 return;
             }
 
-            let errorID: string = LogRequestsComponent.logRequest(req, res, err, '500 Internal Error', err instanceof BadRequestError || err instanceof ServiceUnavailableHttpError);
+            const errorId: string = LogRequestsComponent.logRequest(req, res, err, '500 Internal Error',
+                err instanceof BadRequestError || err instanceof ServiceUnavailableHttpError);
 
             let httpError: HttpError;
 
@@ -123,7 +124,7 @@ export default abstract class Application implements Extendable<ApplicationCompo
             } else if (err instanceof TemplateError && err.cause instanceof HttpError) {
                 httpError = err.cause;
             } else {
-                httpError = new ServerError('Internal server error.', err);
+                httpError = new ServerError('Internal server error.', err instanceof Error ? err : undefined);
             }
 
             res.status(httpError.errorCode);
@@ -133,7 +134,7 @@ export default abstract class Application implements Extendable<ApplicationCompo
                         error_code: httpError.errorCode,
                         error_message: httpError.message,
                         error_instructions: httpError.instructions,
-                        error_id: errorID,
+                        error_id: errorId,
                     });
                 },
                 json: () => {
@@ -142,12 +143,12 @@ export default abstract class Application implements Extendable<ApplicationCompo
                         code: httpError.errorCode,
                         message: httpError.message,
                         instructions: httpError.instructions,
-                        error_id: errorID,
+                        error_id: errorId,
                     });
                 },
                 default: () => {
-                    res.type('txt').send(`${httpError.errorCode} - ${httpError.message}\n\n${httpError.instructions}\n\nError ID: ${errorID}`);
-                }
+                    res.type('txt').send(`${httpError.errorCode} - ${httpError.message}\n\n${httpError.instructions}\n\nError ID: ${errorId}`);
+                },
             });
         });
 
@@ -262,18 +263,20 @@ export default abstract class Application implements Extendable<ApplicationCompo
         return this.webSocketListeners;
     }
 
-    public getCache(): CacheProvider | undefined {
-        return this.cacheProvider;
+    public getCache(): CacheProvider | null {
+        return this.cacheProvider || null;
     }
 
-    public as<C extends ApplicationComponent>(type: Type<C>): C {
-        const component = this.components.find(component => component.constructor === type);
-        if (!component) throw new Error(`This app doesn't have a ${type.name} component.`);
-        return component as C;
+    public as<C extends ApplicationComponent | WebSocketListener<Application>>(type: Type<C>): C {
+        const module = this.components.find(component => component.constructor === type) ||
+            Object.values(this.webSocketListeners).find(listener => listener.constructor === type);
+        if (!module) throw new Error(`This app doesn't have a ${type.name} component.`);
+        return module as C;
     }
 
-    public asOptional<C extends ApplicationComponent>(type: Type<C>): C | null {
-        const component = this.components.find(component => component.constructor === type);
-        return component ? component as C : null;
+    public asOptional<C extends ApplicationComponent | WebSocketListener<Application>>(type: Type<C>): C | null {
+        const module = this.components.find(component => component.constructor === type) ||
+            Object.values(this.webSocketListeners).find(listener => listener.constructor === type);
+        return module ? module as C : null;
     }
 }

src/ApplicationComponent.ts

@@ -1,10 +1,10 @@
 import {Express, Router} from "express";
 import Logger from "./Logger";
-import {sleep, Type} from "./Utils";
+import {sleep} from "./Utils";
 import Application from "./Application";
 import config from "config";
 import SecurityError from "./SecurityError";
-import Middleware from "./Middleware";
+import Middleware, {MiddlewareType} from "./Middleware";
 
 export default abstract class ApplicationComponent {
     private currentRouter?: Router;
@@ -28,16 +28,16 @@ export default abstract class ApplicationComponent {
                 err = null;
             } catch (e) {
                 err = e;
-                Logger.error(err, `${name} failed to prepare; retrying in 5s...`)
+                Logger.error(err, `${name} failed to prepare; retrying in 5s...`);
                 await sleep(5000);
             }
         } while (err);
         Logger.info(`${name} ready!`);
     }
 
-    protected async close(thingName: string, thing: any, fn: Function): Promise<void> {
+    protected async close(thingName: string, fn: (callback: (err?: Error | null) => void) => void): Promise<void> {
         try {
-            await new Promise((resolve, reject) => fn.call(thing, (err: any) => {
+            await new Promise((resolve, reject) => fn((err?: Error | null) => {
                 if (err) reject(err);
                 else resolve();
             }));
@@ -48,13 +48,13 @@ export default abstract class ApplicationComponent {
         }
     }
 
-    protected checkSecurityConfigField(field: string) {
+    protected checkSecurityConfigField(field: string): void {
         if (!config.has(field) || config.get<string>(field) === 'default') {
             throw new SecurityError(`${field} field not configured.`);
         }
     }
 
-    protected use<M extends Middleware>(middleware: Type<M>): void {
+    protected use<M extends Middleware>(middleware: MiddlewareType<M>): void {
         if (!this.currentRouter) throw new Error('Cannot call this method outside init() and handle().');
 
         const instance = new middleware(this.getApp());
@@ -67,10 +67,6 @@ export default abstract class ApplicationComponent {
         });
     }
 
-    protected getCurrentRouter(): Router | null {
-        return this.currentRouter || null;
-    }
-
     public setCurrentRouter(router: Router | null): void {
         this.currentRouter = router || undefined;
     }
@@ -80,7 +76,7 @@ export default abstract class ApplicationComponent {
         return this.app;
     }
 
-    public setApp(app: Application) {
+    public setApp(app: Application): void {
         this.app = app;
     }
 }

src/CacheProvider.ts

@@ -11,4 +11,4 @@ export default interface CacheProvider {
      * @param ttl in ms
      */
     remember(key: string, value: string, ttl: number): Promise<void>;
-}
+}

src/Controller.ts

@@ -6,14 +6,18 @@ import Validator, {ValidationBag} from "./db/Validator";
 import FileUploadMiddleware from "./FileUploadMiddleware";
 import * as querystring from "querystring";
 import {ParsedUrlQueryInput} from "querystring";
-import Middleware from "./Middleware";
-import {Type} from "./Utils";
+import Middleware, {MiddlewareType} from "./Middleware";
 import Application from "./Application";
 
 export default abstract class Controller {
-    private static readonly routes: { [p: string]: string } = {};
-
-    public static route(route: string, params: RouteParams = [], query: ParsedUrlQueryInput = {}, absolute: boolean = false): string {
+    private static readonly routes: { [p: string]: string | undefined } = {};
+
+    public static route(
+        route: string,
+        params: RouteParams = [],
+        query: ParsedUrlQueryInput = {},
+        absolute: boolean = false,
+    ): string {
         let path = this.routes[route];
         if (path === undefined) throw new Error(`Unknown route for name ${route}.`);
 
@@ -29,10 +33,8 @@ export default abstract class Controller {
             }
             path = path.replace(/\/+/g, '/');
         } else {
-            for (const key in params) {
-                if (params.hasOwnProperty(key)) {
-                    path = path.replace(new RegExp(`:${key}\\??`), params[key]);
-                }
+            for (const key of Object.keys(params)) {
+                path = path.replace(new RegExp(`:${key}\\??`), params[key]);
             }
         }
 
@@ -64,10 +66,7 @@ export default abstract class Controller {
 
     public abstract routes(): void;
 
-    public setupRoutes(): {
-        mainRouter: Router,
-        fileUploadFormRouter: Router
-    } {
+    public setupRoutes(): { mainRouter: Router, fileUploadFormRouter: Router } {
         this.routes();
         return {
             mainRouter: this.router,
@@ -75,23 +74,43 @@ export default abstract class Controller {
         };
     }
 
-    protected use(handler: RequestHandler) {
+    protected use(handler: RequestHandler): void {
         this.router.use(handler);
     }
 
-    protected get(path: PathParams, handler: RequestHandler, routeName?: string, ...middlewares: (Type<Middleware>)[]) {
+    protected get(
+        path: PathParams,
+        handler: RequestHandler,
+        routeName?: string,
+        ...middlewares: (MiddlewareType<Middleware>)[]
+    ): void {
         this.handle('get', path, handler, routeName, ...middlewares);
     }
 
-    protected post(path: PathParams, handler: RequestHandler, routeName?: string, ...middlewares: (Type<Middleware>)[]) {
+    protected post(
+        path: PathParams,
+        handler: RequestHandler,
+        routeName?: string,
+        ...middlewares: (MiddlewareType<Middleware>)[]
+    ): void {
         this.handle('post', path, handler, routeName, ...middlewares);
     }
 
-    protected put(path: PathParams, handler: RequestHandler, routeName?: string, ...middlewares: (Type<Middleware>)[]) {
+    protected put(
+        path: PathParams,
+        handler: RequestHandler,
+        routeName?: string,
+        ...middlewares: (MiddlewareType<Middleware>)[]
+    ): void {
         this.handle('put', path, handler, routeName, ...middlewares);
     }
 
-    protected delete(path: PathParams, handler: RequestHandler, routeName?: string, ...middlewares: (Type<Middleware>)[]) {
+    protected delete(
+        path: PathParams,
+        handler: RequestHandler,
+        routeName?: string,
+        ...middlewares: (MiddlewareType<Middleware>)[]
+    ): void {
         this.handle('delete', path, handler, routeName, ...middlewares);
     }
 
@@ -100,7 +119,7 @@ export default abstract class Controller {
         path: PathParams,
         handler: RequestHandler,
         routeName?: string,
-        ...middlewares: (Type<Middleware>)[]
+        ...middlewares: (MiddlewareType<Middleware>)[]
     ): void {
         this.registerRoutes(path, handler, routeName);
         for (const middleware of middlewares) {
@@ -152,18 +171,19 @@ export default abstract class Controller {
         }
     }
 
-    protected async validate(validationMap: { [p: string]: Validator<any> }, body: any): Promise<void> {
+    protected async validate(
+        validationMap: { [p: string]: Validator<unknown> },
+        body: { [p: string]: unknown },
+    ): Promise<void> {
         const bag = new ValidationBag();
 
-        for (const p in validationMap) {
-            if (validationMap.hasOwnProperty(p)) {
-                try {
-                    await validationMap[p].execute(p, body[p], false);
-                } catch (e) {
-                    if (e instanceof ValidationBag) {
-                        bag.addBag(e);
-                    } else throw e;
-                }
+        for (const p of Object.keys(validationMap)) {
+            try {
+                await validationMap[p].execute(p, body[p], false);
+            } catch (e) {
+                if (e instanceof ValidationBag) {
+                    bag.addBag(e);
+                } else throw e;
             }
         }
 
@@ -175,7 +195,7 @@ export default abstract class Controller {
         return this.app;
     }
 
-    public setApp(app: Application) {
+    public setApp(app: Application): void {
         this.app = app;
     }
 }

src/Extendable.ts

@@ -4,4 +4,4 @@ export default interface Extendable<ComponentClass> {
     as<C extends ComponentClass>(type: Type<C>): C;
 
     asOptional<C extends ComponentClass>(type: Type<C>): C | null;
-}
+}

src/FileUploadMiddleware.ts

@@ -11,7 +11,7 @@ export default abstract class FileUploadMiddleware extends Middleware {
     public async handle(req: Request, res: Response, next: NextFunction): Promise<void> {
         const form = this.makeForm();
         try {
-            await new Promise<any>((resolve, reject) => {
+            await new Promise<void>((resolve, reject) => {
                 form.parse(req, (err, fields, files) => {
                     if (err) {
                         reject(err);
@@ -32,4 +32,4 @@ export default abstract class FileUploadMiddleware extends Middleware {
         }
         next();
     }
-}
+}

src/HttpError.ts

@@ -8,7 +8,7 @@ export abstract class HttpError extends WrappingError {
         this.instructions = instructions;
     }
 
-    get name(): string {
+    public get name(): string {
         return this.constructor.name;
     }
 
@@ -18,87 +18,83 @@ export abstract class HttpError extends WrappingError {
 export class BadRequestError extends HttpError {
     public readonly url: string;
 
-    constructor(message: string, instructions: string, url: string, cause?: Error) {
+    public constructor(message: string, instructions: string, url: string, cause?: Error) {
         super(message, instructions, cause);
         this.url = url;
     }
 
-    get errorCode(): number {
+    public get errorCode(): number {
         return 400;
     }
 }
 
 export class UnauthorizedHttpError extends BadRequestError {
-    constructor(message: string, url: string, cause?: Error) {
+    public constructor(message: string, url: string, cause?: Error) {
         super(message, '', url, cause);
     }
 
-    get errorCode(): number {
+    public get errorCode(): number {
         return 401;
     }
 }
 
 export class ForbiddenHttpError extends BadRequestError {
-    constructor(thing: string, url: string, cause?: Error) {
+    public constructor(thing: string, url: string, cause?: Error) {
         super(
             `You don't have access to this ${thing}.`,
             `${url} doesn't belong to *you*.`,
             url,
-            cause
+            cause,
         );
     }
 
-    get errorCode(): number {
+    public get errorCode(): number {
         return 403;
     }
 }
 
 export class NotFoundHttpError extends BadRequestError {
-    constructor(thing: string, url: string, cause?: Error) {
+    public constructor(thing: string, url: string, cause?: Error) {
         super(
             `${thing.charAt(0).toUpperCase()}${thing.substr(1)} not found.`,
             `${url} doesn't exist or was deleted.`,
             url,
-            cause
+            cause,
         );
     }
 
-    get errorCode(): number {
+    public get errorCode(): number {
         return 404;
     }
 }
 
 export class TooManyRequestsHttpError extends BadRequestError {
-    constructor(retryIn: number, cause?: Error) {
+    public constructor(retryIn: number, cause?: Error) {
         super(
             `You're making too many requests!`,
             `We need some rest. Please retry in ${Math.floor(retryIn / 1000)} seconds.`,
             '',
-            cause
+            cause,
         );
     }
 
-    get errorCode(): number {
+    public get errorCode(): number {
         return 429;
     }
 }
 
 export class ServerError extends HttpError {
-    constructor(message: string, cause?: Error) {
+    public constructor(message: string, cause?: Error) {
         super(message, `Maybe you should contact us; see instructions below.`, cause);
     }
 
-    get errorCode(): number {
+    public get errorCode(): number {
         return 500;
     }
 }
 
 export class ServiceUnavailableHttpError extends ServerError {
-    constructor(message: string, cause?: Error) {
-        super(message, cause);
-    }
-
-    get errorCode(): number {
+    public get errorCode(): number {
         return 503;
     }
-}
+}

src/Logger.ts

@@ -1,17 +1,31 @@
 import config from "config";
 import {v4 as uuid} from "uuid";
 import Log from "./models/Log";
-import {bufferToUUID} from "./Utils";
+import {bufferToUuid} from "./Utils";
+import ModelFactory from "./db/ModelFactory";
 
+export enum LogLevel {
+    ERROR,
+    WARN,
+    INFO,
+    DEBUG,
+    DEV,
+}
+
+export type LogLevelKeys = keyof typeof LogLevel;
+
+/**
+ * TODO: make logger not static
+ */
 export default class Logger {
-    private static logLevel: LogLevelKeys = <LogLevelKeys>config.get<string>('log.level');
-    private static dbLogLevel: LogLevelKeys = <LogLevelKeys>config.get<string>('log.db_level');
+    private static logLevel: LogLevel = LogLevel[<LogLevelKeys>config.get<string>('log.level')];
+    private static dbLogLevel: LogLevel = LogLevel[<LogLevelKeys>config.get<string>('log.db_level')];
     private static verboseMode: boolean = config.get<boolean>('log.verbose');
 
-    public static verbose() {
+    public static verbose(): void {
         this.verboseMode = true;
-        this.logLevel = <LogLevelKeys>LogLevel[LogLevel[this.logLevel] + 1] || this.logLevel;
-        this.dbLogLevel = <LogLevelKeys>LogLevel[LogLevel[this.dbLogLevel] + 1] || this.dbLogLevel;
+        if (LogLevel[this.logLevel + 1]) this.logLevel++;
+        if (LogLevel[this.dbLogLevel + 1]) this.dbLogLevel++;
         Logger.info('Verbose mode');
     }
 
@@ -19,46 +33,45 @@ export default class Logger {
         return this.verboseMode;
     }
 
-    public static silentError(error: Error, ...message: any[]): string {
-        return this.log('ERROR', message, error, true) || '';
+    public static silentError(error: Error, ...message: unknown[]): string {
+        return this.log(LogLevel.ERROR, message, error, true) || '';
     }
 
-    public static error(error: Error, ...message: any[]): string {
-        return this.log('ERROR', message, error) || '';
+    public static error(error: Error, ...message: unknown[]): string {
+        return this.log(LogLevel.ERROR, message, error) || '';
     }
 
-    public static warn(...message: any[]) {
-        this.log('WARN', message);
+    public static warn(...message: unknown[]): void {
+        this.log(LogLevel.WARN, message);
     }
 
-    public static info(...message: any[]) {
-        this.log('INFO', message);
+    public static info(...message: unknown[]): void {
+        this.log(LogLevel.INFO, message);
     }
 
-    public static debug(...message: any[]) {
-        this.log('DEBUG', message);
+    public static debug(...message: unknown[]): void {
+        this.log(LogLevel.DEBUG, message);
     }
 
-    public static dev(...message: any[]) {
-        this.log('DEV', message);
+    public static dev(...message: unknown[]): void {
+        this.log(LogLevel.DEV, message);
     }
 
-    private static log(level: LogLevelKeys, message: any[], error?: Error, silent: boolean = false): string | null {
-        const levelIndex = LogLevel[level];
-        if (levelIndex <= LogLevel[this.logLevel]) {
+    private static log(level: LogLevel, message: unknown[], error?: Error, silent: boolean = false): string | null {
+        if (level <= this.logLevel) {
             if (error) {
-                if (levelIndex > LogLevel.ERROR) this.warn(`Wrong log level ${level} with attached error.`);
+                if (level > LogLevel.ERROR) this.warn(`Wrong log level ${level} with attached error.`);
             } else {
-                if (levelIndex <= LogLevel.ERROR) this.warn(`No error attached with log level ${level}.`);
+                if (level <= LogLevel.ERROR) this.warn(`No error attached with log level ${level}.`);
             }
 
             const computedMsg = message.map(v => {
                 if (typeof v === 'string') {
                     return v;
                 } else {
-                    return JSON.stringify(v, (key: string, value: any) => {
-                        if (value instanceof Object) {
-                            if (value.type === 'Buffer') {
+                    return JSON.stringify(v, (key: string, value: string | unknown[] | Record<string, unknown>) => {
+                        if (!Array.isArray(value) && value instanceof Object) {
+                            if (value.type === 'Buffer' && typeof value.data === 'string') {
                                 return `Buffer<${Buffer.from(value.data).toString('hex')}>`;
                             } else if (value !== v) {
                                 return `[object Object]`;
@@ -72,65 +85,56 @@ export default class Logger {
                 }
             }).join(' ');
 
-            const shouldSaveToDB = levelIndex <= LogLevel[this.dbLogLevel];
+            const shouldSaveToDB = level <= this.dbLogLevel;
 
             let output = `[${level}] `;
             const pad = output.length;
 
-            const logID = Buffer.alloc(16);
-            uuid({}, logID);
-            let strLogID = bufferToUUID(logID);
-            if (shouldSaveToDB) output += `${strLogID} - `;
+            const logId = Buffer.alloc(16);
+            uuid({}, logId);
+            const strLogId = bufferToUuid(logId);
+            if (shouldSaveToDB) output += `${strLogId} - `;
 
             output += computedMsg.replace(/\n/g, '\n' + ' '.repeat(pad));
 
             switch (level) {
-                case "ERROR":
+                case LogLevel.ERROR:
                     if (silent || !error) {
                         console.error(output);
                     } else {
                         console.error(output, error);
                     }
                     break;
-                case "WARN":
+                case LogLevel.WARN:
                     console.warn(output);
                     break;
-                case "INFO":
+                case LogLevel.INFO:
                     console.info(output);
                     break;
-                case "DEBUG":
-                case "DEV":
+                case LogLevel.DEBUG:
+                case LogLevel.DEV:
                     console.debug(output);
                     break;
             }
 
-            if (shouldSaveToDB) {
+            if (shouldSaveToDB && ModelFactory.has(Log)) {
                 const log = Log.create({});
                 log.setLevel(level);
                 log.message = computedMsg;
                 log.setError(error);
-                log.setLogID(logID);
+                log.setLogId(logId);
                 log.save().catch(err => {
                     if (!silent && err.message.indexOf('ECONNREFUSED') < 0) {
                         console.error({save_err: err, error});
                     }
                 });
             }
-            return strLogID;
+            return strLogId;
         }
         return null;
     }
 
     private constructor() {
+        // disable constructor
     }
 }
-
-export enum LogLevel {
-    ERROR,
-    WARN,
-    INFO,
-    DEBUG,
-    DEV,
-}
-
-export type LogLevelKeys = keyof typeof LogLevel;

src/Mail.ts

@@ -7,9 +7,10 @@ import {WrappingError} from "./Utils";
 import mjml2html from "mjml";
 import Logger from "./Logger";
 import Controller from "./Controller";
+import {ParsedUrlQueryInput} from "querystring";
 
 export default class Mail {
-    private static transporter: Transporter;
+    private static transporter?: Transporter;
 
     private static getTransporter(): Transporter {
         if (!this.transporter) throw new MailError('Mail system was not prepared.');
@@ -26,8 +27,8 @@ export default class Mail {
                 pass: config.get('mail.password'),
             },
             tls: {
-                rejectUnauthorized: !config.get('mail.allow_invalid_tls')
-            }
+                rejectUnauthorized: !config.get('mail.allow_invalid_tls'),
+            },
         });
 
         try {
@@ -40,11 +41,11 @@ export default class Mail {
         Logger.info(`Mail ready to be distributed via ${config.get('mail.host')}:${config.get('mail.port')}`);
     }
 
-    public static end() {
+    public static end(): void {
         if (this.transporter) this.transporter.close();
     }
 
-    public static parse(template: string, data: any, textOnly: boolean): string {
+    public static parse(template: string, data: { [p: string]: unknown }, textOnly: boolean): string {
         data.text = textOnly;
         const nunjucksResult = nunjucks.render(template, data);
         if (textOnly) return nunjucksResult;
@@ -60,9 +61,9 @@ export default class Mail {
 
     private readonly template: MailTemplate;
     private readonly options: Options = {};
-    private readonly data: { [p: string]: any };
+    private readonly data: ParsedUrlQueryInput;
 
-    constructor(template: MailTemplate, data: { [p: string]: any } = {}) {
+    public constructor(template: MailTemplate, data: ParsedUrlQueryInput = {}) {
         this.template = template;
         this.data = data;
         this.options.subject = this.template.getSubject(data);
@@ -97,7 +98,8 @@ export default class Mail {
             // Set data
             this.data.mail_subject = this.options.subject;
             this.data.mail_to = this.options.to;
-            this.data.mail_link = config.get<string>('base_url') + Controller.route('mail', [this.template.template], this.data);
+            this.data.mail_link = config.get<string>('base_url') +
+                Controller.route('mail', [this.template.template], this.data);
             this.data.app = config.get('app');
 
             // Log
@@ -117,9 +119,9 @@ export default class Mail {
 
 export class MailTemplate {
     private readonly _template: string;
-    private readonly subject: (data: any) => string;
+    private readonly subject: (data: { [p: string]: unknown }) => string;
 
-    constructor(template: string, subject: (data: any) => string) {
+    public constructor(template: string, subject: (data: { [p: string]: unknown }) => string) {
         this._template = template;
         this.subject = subject;
     }
@@ -128,13 +130,13 @@ export class MailTemplate {
         return this._template;
     }
 
-    public getSubject(data: any): string {
+    public getSubject(data: { [p: string]: unknown }): string {
         return `${config.get('app.name')} - ${this.subject(data)}`;
     }
 }
 
 class MailError extends WrappingError {
-    constructor(message: string = 'An error occurred while sending mail.', cause?: Error) {
+    public constructor(message: string = 'An error occurred while sending mail.', cause?: Error) {
         super(message, cause);
     }
-}
+}

src/Mails.ts

@@ -3,12 +3,12 @@ import {MailTemplate} from "./Mail";
 
 export const MAGIC_LINK_MAIL = new MailTemplate(
     'magic_link',
-    data => data.type === 'register' ? 'Registration' : 'Login magic link'
+    data => data.type === 'register' ? 'Registration' : 'Login magic link',
 );
 
 export const ACCOUNT_REVIEW_NOTICE_MAIL_TEMPLATE: MailTemplate = new MailTemplate(
     'account_review_notice',
-    data => `Your account was ${data.approved ? 'approved' : 'rejected'}.`
+    data => `Your account was ${data.approved ? 'approved' : 'rejected'}.`,
 );
 
 export const PENDING_ACCOUNT_REVIEW_MAIL_TEMPLATE: MailTemplate = new MailTemplate(

src/Middleware.ts

@@ -1,6 +1,7 @@
 import {RequestHandler} from "express";
 import {NextFunction, Request, Response} from "express-serve-static-core";
 import Application from "./Application";
+import {Type} from "./Utils";
 
 export default abstract class Middleware {
     public constructor(
@@ -26,3 +27,7 @@ export default abstract class Middleware {
         };
     }
 }
+
+export interface MiddlewareType<M extends Middleware> extends Type<M> {
+    new(app: Application): M;
+}

src/Pagination.ts

@@ -6,7 +6,7 @@ export default class Pagination<T extends Model> {
     public readonly perPage: number;
     public readonly totalCount: number;
 
-    constructor(models: T[], page: number, perPage: number, totalCount: number) {
+    public constructor(models: T[], page: number, perPage: number, totalCount: number) {
         this.models = models;
         this.page = page;
         this.perPage = perPage;
@@ -21,4 +21,4 @@ export default class Pagination<T extends Model> {
         return this.models.length >= this.perPage && this.page * this.perPage < this.totalCount;
     }
 
-}
+}

src/SecurityError.ts

@@ -5,4 +5,4 @@ export default class SecurityError implements Error {
     public constructor(message: string) {
         this.message = message;
     }
-}
+}

src/Throttler.ts

@@ -1,7 +1,7 @@
 import {TooManyRequestsHttpError} from "./HttpError";
 
 export default class Throttler {
-    private static readonly throttles: { [throttleName: string]: Throttle } = {};
+    private static readonly throttles: Record<string, Throttle | undefined> = {};
 
     /**
      * Throttle function; will throw a TooManyRequestsHttpError when the threshold is reached.
@@ -16,13 +16,21 @@ export default class Throttler {
      * @param holdPeriod time in ms after each call before the threshold begins to decrease.
      * @param jailPeriod time in ms for which the throttle will throw when it is triggered.
      */
-    public static throttle(action: string, max: number, resetPeriod: number, id: string, holdPeriod: number = 100, jailPeriod: number = 30 * 1000) {
+    public static throttle(
+        action: string,
+        max: number,
+        resetPeriod: number,
+        id: string,
+        holdPeriod: number = 100,
+        jailPeriod: number = 30 * 1000,
+    ): void {
         let throttle = this.throttles[action];
         if (!throttle) throttle = this.throttles[action] = new Throttle(max, resetPeriod, holdPeriod, jailPeriod);
         throttle.trigger(id);
     }
 
     private constructor() {
+        // Disable constructor
     }
 }
 
@@ -31,15 +39,13 @@ class Throttle {
     private readonly resetPeriod: number;
     private readonly holdPeriod: number;
     private readonly jailPeriod: number;
-    private readonly triggers: {
-        [id: string]: {
-            count: number,
-            lastTrigger?: number,
-            jailed?: number;
-        }
-    } = {};
+    private readonly triggers: Record<string, {
+        count: number,
+        lastTrigger?: number,
+        jailed?: number;
+    } | undefined> = {};
 
-    constructor(max: number, resetPeriod: number, holdPeriod: number, jailPeriod: number) {
+    public constructor(max: number, resetPeriod: number, holdPeriod: number, jailPeriod: number) {
         this.max = max;
         this.resetPeriod = resetPeriod;
         this.holdPeriod = holdPeriod;
@@ -51,12 +57,10 @@ class Throttle {
         let trigger = this.triggers[id];
         if (!trigger) trigger = this.triggers[id] = {count: 0};
 
-        let currentDate = new Date().getTime();
+        const currentDate = new Date().getTime();
 
-        if (trigger.jailed && currentDate - trigger.jailed < this.jailPeriod) {
-            this.throw((trigger.jailed + this.jailPeriod) - currentDate);
-            return;
-        }
+        if (trigger.jailed && currentDate - trigger.jailed < this.jailPeriod)
+            return this.throw(trigger.jailed + this.jailPeriod - currentDate);
 
         if (trigger.lastTrigger) {
             let timeDiff = currentDate - trigger.lastTrigger;
@@ -71,12 +75,11 @@ class Throttle {
 
         if (trigger.count > this.max) {
             trigger.jailed = currentDate;
-            this.throw((trigger.jailed + this.jailPeriod) - currentDate);
-            return;
+            return this.throw(trigger.jailed + this.jailPeriod - currentDate);
         }
     }
 
     protected throw(unjailedIn: number) {
         throw new TooManyRequestsHttpError(unjailedIn);
     }
-}
+}

src/Utils.ts

@@ -18,7 +18,7 @@ export abstract class WrappingError extends Error {
         }
     }
 
-    get name(): string {
+    public get name(): string {
         return this.constructor.name;
     }
 }
@@ -28,15 +28,15 @@ export function cryptoRandomDictionary(size: number, dictionary: string): string
     const output = new Array(size);
 
     for (let i = 0; i < size; i++) {
-        output[i] = dictionary[Math.floor((randomBytes[i] / 255) * dictionary.length)];
+        output[i] = dictionary[Math.floor(randomBytes[i] / 255 * dictionary.length)];
     }
 
     return output.join('');
 }
 
-export type Type<T> = { new(...args: any[]): T };
+export type Type<T> = { new(...args: never[]): T };
 
-export function bufferToUUID(buffer: Buffer): string {
+export function bufferToUuid(buffer: Buffer): string {
     const chars = buffer.toString('hex');
     let out = '';
     let i = 0;
@@ -48,12 +48,12 @@ export function bufferToUUID(buffer: Buffer): string {
     return out;
 }
 
-export function getMethods<T>(obj: T): (string)[] {
-    let properties = new Set()
-    let currentObj = obj
+export function getMethods<T extends { [p: string]: unknown }>(obj: T): string[] {
+    const properties = new Set<string>();
+    let currentObj: T | unknown = obj;
     do {
-        Object.getOwnPropertyNames(currentObj).map(item => properties.add(item))
-    } while ((currentObj = Object.getPrototypeOf(currentObj)))
-    // @ts-ignore
-    return [...properties.keys()].filter(item => typeof obj[item] === 'function')
+        Object.getOwnPropertyNames(currentObj).map(item => properties.add(item));
+        currentObj = Object.getPrototypeOf(currentObj);
+    } while (currentObj);
+    return [...properties.keys()].filter(item => typeof obj[item] === 'function');
 }

src/WebSocketListener.ts

@@ -15,5 +15,9 @@ export default abstract class WebSocketListener<T extends Application> {
 
     public abstract path(): string;
 
-    public abstract async handle(socket: WebSocket, request: IncomingMessage, session: Express.Session | null): Promise<void>;
-}
+    public abstract async handle(
+        socket: WebSocket,
+        request: IncomingMessage,
+        session: Express.Session | null,
+    ): Promise<void>;
+}

src/auth/AuthComponent.ts

@@ -31,7 +31,7 @@ export class AuthMiddleware extends Middleware {
     protected async handle(req: Request, res: Response, next: NextFunction): Promise<void> {
         this.authGuard = this.app.as(AuthComponent).getAuthGuard();
 
-        const proof = await this.authGuard.isAuthenticated(req.session!);
+        const proof = await this.authGuard.isAuthenticated(req.getSession());
         if (proof) {
             this.user = await proof.getResource();
             res.locals.user = this.user;
@@ -76,7 +76,7 @@ export class RequireAuthMiddleware extends Middleware {
         }
 
         // Via session
-        if (!await authGuard.isAuthenticated(req.session!)) {
+        if (!await authGuard.isAuthenticated(req.getSession())) {
             req.flash('error', `You must be logged in to access ${req.url}.`);
             res.redirect(Controller.route('auth', undefined, {
                 redirect_uri: req.url,
@@ -90,7 +90,7 @@ export class RequireAuthMiddleware extends Middleware {
 
 export class RequireGuestMiddleware extends Middleware {
     protected async handle(req: Request, res: Response, next: NextFunction): Promise<void> {
-        if (await req.as(AuthMiddleware).getAuthGuard().isAuthenticated(req.session!)) {
+        if (await req.as(AuthMiddleware).getAuthGuard().isAuthenticated(req.getSession())) {
             res.redirectBack();
             return;
         }

src/auth/AuthController.ts

@@ -7,14 +7,14 @@ export default abstract class AuthController extends Controller {
         return '/auth';
     }
 
-    public routes() {
+    public routes(): void {
         this.get('/', this.getAuth, 'auth', RequireGuestMiddleware);
         this.post('/', this.postAuth, 'auth', RequireGuestMiddleware);
         this.get('/check', this.getCheckAuth, 'check_auth');
         this.post('/logout', this.postLogout, 'logout', RequireAuthMiddleware);
     }
 
-    protected async getAuth(req: Request, res: Response, next: NextFunction): Promise<void> {
+    protected async getAuth(req: Request, res: Response, _next: NextFunction): Promise<void> {
         const registerEmail = req.flash('register_confirm_email');
         res.render('auth/auth', {
             register_confirm_email: registerEmail.length > 0 ? registerEmail[0] : null,
@@ -25,11 +25,11 @@ export default abstract class AuthController extends Controller {
 
     protected abstract async getCheckAuth(req: Request, res: Response, next: NextFunction): Promise<void>;
 
-    protected async postLogout(req: Request, res: Response, next: NextFunction): Promise<void> {
+    protected async postLogout(req: Request, res: Response, _next: NextFunction): Promise<void> {
         const proof = await req.as(AuthMiddleware).getAuthGuard().getProof(req);
         await proof?.revoke();
         req.flash('success', 'Successfully logged out.');
         res.redirect(req.query.redirect_uri?.toString() || '/');
     }
 
-}
+}

src/auth/AuthGuard.ts

@@ -11,7 +11,7 @@ import config from "config";
 export default abstract class AuthGuard<P extends AuthProof<User>> {
     protected abstract async getProofForSession(session: Express.Session): Promise<P | null>;
 
-    protected async getProofForRequest(req: Request): Promise<P | null> {
+    protected async getProofForRequest(_req: Request): Promise<P | null> {
         return null;
     }
 
@@ -52,7 +52,7 @@ export default abstract class AuthGuard<P extends AuthProof<User>> {
         session: Express.Session,
         proof: P,
         onLogin?: (user: User) => Promise<void>,
-        onRegister?: (connection: Connection, user: User) => Promise<RegisterCallback[]>
+        onRegister?: (connection: Connection, user: User) => Promise<RegisterCallback[]>,
     ): Promise<User> {
         if (!await proof.isValid()) throw new InvalidAuthProofError();
         if (!await proof.isAuthorized()) throw new UnauthorizedAuthProofError();
@@ -63,27 +63,24 @@ export default abstract class AuthGuard<P extends AuthProof<User>> {
         if (!user) {
             const callbacks: RegisterCallback[] = [];
 
-            await MysqlConnectionManager.wrapTransaction(async connection => {
-                user = User.create({});
+            user = await MysqlConnectionManager.wrapTransaction(async connection => {
+                const user = User.create({});
                 await user.save(connection, c => callbacks.push(c));
                 if (onRegister) {
                     (await onRegister(connection, user)).forEach(c => callbacks.push(c));
                 }
+                return user;
             });
 
             for (const callback of callbacks) {
                 await callback();
             }
 
-            if (user) {
-                if (!user!.isApproved()) {
-                    await new Mail(PENDING_ACCOUNT_REVIEW_MAIL_TEMPLATE, {
-                        username: user!.name,
-                        link: config.get<string>('base_url') + Controller.route('accounts-approval'),
-                    }).send(config.get<string>('app.contact_email'));
-                }
-            } else {
-                throw new Error('Unable to register user.');
+            if (!user.isApproved()) {
+                await new Mail(PENDING_ACCOUNT_REVIEW_MAIL_TEMPLATE, {
+                    username: (await user.mainEmail.get())?.getOrFail('email'),
+                    link: config.get<string>('base_url') + Controller.route('accounts-approval'),
+                }).send(config.get<string>('app.contact_email'));
             }
         }
 
@@ -102,28 +99,25 @@ export default abstract class AuthGuard<P extends AuthProof<User>> {
 }
 
 export class AuthError extends Error {
-    constructor(message: string) {
-        super(message);
-    }
 }
 
 export class AuthProofError extends AuthError {
 }
 
 export class InvalidAuthProofError extends AuthProofError {
-    constructor() {
+    public constructor() {
         super('Invalid auth proof.');
     }
 }
 
 export class UnauthorizedAuthProofError extends AuthProofError {
-    constructor() {
+    public constructor() {
         super('Unauthorized auth proof.');
     }
 }
 
 export class PendingApprovalAuthError extends AuthError {
-    constructor() {
+    public constructor() {
         super(`User is not approved.`);
     }
 }

src/auth/AuthProof.ts

@@ -2,8 +2,8 @@
  * This class is most commonly used for authentication. It can be more generically used to represent a verification
  * state of whether a given resource is owned by a session.
  *
- * Any auth system should consider this auth proof valid if and only if both {@code isValid()} and {@code isAuthorized()}
- * both return {@code true}.
+ * Any auth system should consider this auth proof valid if and only if both {@code isValid()} and
+ * {@code isAuthorized()} both return {@code true}.
  *
  * @type <R> The resource type this AuthProof authorizes.
  */
@@ -34,7 +34,8 @@ export default interface AuthProof<R> {
      * - {@code isAuthorized} returns {@code false}
      * - There is no way to re-authorize this proof (i.e. {@code isAuthorized} can never return {@code true} again)
      *
-     * Additionally, this method should delete any stored data that could lead to restoration of this AuthProof instance.
+     * Additionally, this method should delete any stored data that could lead to restoration of this AuthProof
+     * instance.
      */
     revoke(): Promise<void>;
-}
+}

src/auth/MailController.ts

@@ -3,12 +3,12 @@ import Controller from "../Controller";
 import Mail from "../Mail";
 
 export default class MailController extends Controller {
-    routes(): void {
+    public routes(): void {
         this.get("/mail/:template", this.getMail, 'mail');
     }
 
-    private async getMail(request: Request, response: Response) {
+    protected async getMail(request: Request, response: Response): Promise<void> {
         const template = request.params['template'];
         response.send(Mail.parse(`mails/${template}.mjml.njk`, request.query, false));
     }
-}
+}

src/auth/magic_link/MagicLinkAuthController.ts

@@ -15,38 +15,40 @@ import User from "../models/User";
 
 export default abstract class MagicLinkAuthController extends AuthController {
     public static async checkAndAuth(req: Request, res: Response, magicLink: MagicLink): Promise<User | null> {
-        if (magicLink.getSessionID() !== req.sessionID!) throw new BadOwnerMagicLink();
+        const session = req.getSession();
+        if (magicLink.getOrFail('session_id') !== session.id) throw new BadOwnerMagicLink();
         if (!await magicLink.isAuthorized()) throw new UnauthorizedMagicLink();
         if (!await magicLink.isValid()) throw new InvalidMagicLink();
 
         // Auth
         try {
-            return await req.as(AuthMiddleware).getAuthGuard().authenticateOrRegister(req.session!, magicLink, undefined, async (connection, user) => {
-                const callbacks: RegisterCallback[] = [];
-
-                const userEmail = UserEmail.create({
-                    user_id: user.id,
-                    email: magicLink.getEmail(),
+            return await req.as(AuthMiddleware).getAuthGuard().authenticateOrRegister(
+                session, magicLink, undefined, async (connection, user) => {
+                    const callbacks: RegisterCallback[] = [];
+
+                    const userEmail = UserEmail.create({
+                        user_id: user.id,
+                        email: magicLink.getOrFail('email'),
+                    });
+                    await userEmail.save(connection, c => callbacks.push(c));
+                    user.main_email_id = userEmail.id;
+                    await user.save(connection, c => callbacks.push(c));
+
+                    return callbacks;
                 });
-                await userEmail.save(connection, c => callbacks.push(c));
-                user.main_email_id = userEmail.id;
-                await user.save(connection, c => callbacks.push(c));
-
-                return callbacks;
-            });
         } catch (e) {
             if (e instanceof PendingApprovalAuthError) {
                 res.format({
                     json: () => {
                         res.json({
                             'status': 'warning',
-                            'message': `Your account is pending review. You'll receive an email once you're approved.`
+                            'message': `Your account is pending review. You'll receive an email once you're approved.`,
                         });
                     },
                     html: () => {
                         req.flash('warning', `Your account is pending review. You'll receive an email once you're approved.`);
                         res.redirect('/');
-                    }
+                    },
                 });
                 return null;
             } else {
@@ -65,7 +67,8 @@ export default abstract class MagicLinkAuthController extends AuthController {
     }
 
     protected async getAuth</