lint: lib/utils.ts

- install @types/mime-types
- add typing annotate

Author: a60814billy

lib/utils.ts

@@ -1,26 +1,30 @@
+import {NextFunction, Request, Response} from "express";
 import * as fs from "fs";
 import * as path from "path";
 
 import mime from "mime-types";
 import bodyParser from "body-parser";
 
-export function isSQLite(sequelize) {
+export function isSQLite(sequelize): boolean {
   return sequelize.options.dialect === 'sqlite'
 }
 
-export function getImageMimeType(imagePath) {
+export function getImageMimeType(imagePath: string): string | boolean {
   return mime.lookup(path.extname(imagePath))
 }
 
-export function isRevealTheme(theme) {
+export function isRevealTheme(theme: string): string | undefined {
   if (fs.existsSync(path.join(__dirname, '..', 'public', 'build', 'reveal.js', 'css', 'theme', theme + '.css'))) {
     return theme
   }
   return undefined
 }
 
-export function wrap(innerHandler) {
-  return (req, res, next) => innerHandler(req, res).catch(err => next(err))
+export function wrap<T>(innerHandler: (req?: Request, res?: Response, next?: NextFunction) => Promise<T>) {
+  return (req: Request, res: Response, next: NextFunction): void => {
+    innerHandler(req, res)
+      .catch(err => next(err));
+  }
 }
 
 // create application/x-www-form-urlencoded parser

package-lock.json

@@ -115,6 +115,7 @@
     "@types/express-flash": "0.0.2",
     "@types/express-session": "^1.17.3",
     "@types/lodash": "^4.14.170",
+    "@types/mime-types": "^2.1.0",
     "@types/minio": "^7.0.7",
     "@types/node": "~12.20.15",
     "@types/passport-google-oauth20": "^2.0.8",