fix: added linting

.eslintignore

@@ -0,0 +1,4 @@
+node_modules/
+storybook-static/
+dist/
+scripts/

.eslintrc.cjs

@@ -0,0 +1,46 @@
+module.exports = {
+    'env': {
+        'browser': true,
+        'es2021': true,
+        'node': true
+    },
+    'extends': [
+        'eslint:recommended',
+        'plugin:@typescript-eslint/recommended',
+        'prettier',
+    ],
+    'overrides': [
+    ],
+    'parser': '@typescript-eslint/parser',
+    'parserOptions': {
+        'ecmaVersion': 'latest',
+        'sourceType': 'module'
+    },
+    'plugins': [
+        '@typescript-eslint',
+        "prettier",
+        "prefer-arrow",
+        "functional",
+    ],
+    'rules': {
+        "no-var": "error",
+        "prettier/prettier": ["warn"],
+        "prefer-arrow/prefer-arrow-functions": "error",
+        "functional/immutable-data": "error",
+        "functional/no-let": "error",
+        "functional/no-class": "error",
+        "functional/no-mixed-type": "error",
+        "functional/no-this-expression": "error",
+        "functional/no-loop-statement": "error",
+        "functional/no-promise-reject": "error",
+        'no-unused-vars': [
+            'warn',
+            {
+                args: "none",
+                argsIgnorePattern: '^_',
+                varsIgnorePattern: '^_',
+                caughtErrorsIgnorePattern: '^_',
+            },
+        ]
+    }
+}

.yarnrc

@@ -0,0 +1,2 @@
+# .yarnrc
+save-exact true

package.json

@@ -20,6 +20,7 @@
     "dist/"
   ],
   "scripts": {
+    "lint": "eslint .",
     "build": "rollup -c",
     "start": "rollup -c -w",
     "test": "jest"
@@ -43,11 +44,19 @@
     "@types/jsonwebtoken": "^8.5.8",
     "@types/react": "react@^17.0.2 || ^18.0.0-0",
     "@types/react-dom": "react@^17.0.2 || ^18.0.0-0",
+    "@typescript-eslint/eslint-plugin": "^5.36.2",
+    "@typescript-eslint/parser": "^5.36.2",
     "dotenv": "^16.0.0",
+    "eslint": "8.22.0",
+    "eslint-config-prettier": "^8.5.0",
+    "eslint-plugin-functional": "^4.3.0",
+    "eslint-plugin-prefer-arrow": "^1.2.3",
+    "eslint-plugin-prettier": "^4.2.1",
     "jest": "^27.5.1",
     "jest-express": "^1.12.0",
     "node-mocks-http": "^1.11.0",
     "oauth2-mock-server": "^4.3.1",
+    "prettier": "^2.7.1",
     "require": "^2.4.20",
     "rollup": "^2.78.0",
     "rollup-plugin-dts": "4.2.1",
@@ -57,7 +66,8 @@
     "rollup-plugin-typescript2": "^0.31.1",
     "rollup-plugin-visualizer": "^5.6.0",
     "ts-jest": "^27.1.4",
-    "typescript": "^4.7.4"
+    "tsutils": "^3.21.0",
+    "typescript": "^4.8.3"
   },
   "peerDependencies": {}
 }

prettier.config.cjs

@@ -0,0 +1,8 @@
+module.exports = {
+  bracketSpacing: true,
+  printWidth: 80,
+  semi: false,
+  singleQuote: true,
+  trailingComma: 'all',
+  singleAttributePerLine: true,
+}

rollup.config.js

@@ -6,8 +6,7 @@ import commonjs from '@rollup/plugin-commonjs';
 import {visualizer} from 'rollup-plugin-visualizer'
 import summary from "rollup-plugin-summary";
 import json from '@rollup/plugin-json';
-
-const packageJson = require('./package.json');
+import packageJson from './package.json'
 
 export default ({
     input: `./src/index.ts`,

src/storyblok-auth-api/grant/authorized-handler.ts

@@ -1,5 +1,4 @@
 import http from "http";
-// @ts-ignore
 import makeSessionParser from "grant/lib/session";
 import {appendQueryParams} from "@src/utils/query-params/append-query-params";
 import {AppSession, AppSessionQueryParams} from "@src/session/app-session";

src/storyblok-auth-api/storyblok-issuer.ts

@@ -1,11 +1,11 @@
 import {Issuer} from "openid-client";
 
-export const oauthEndpoint = 'https://app.storyblok.com/oauth'
+const oauthEndpoint = 'https://app.storyblok.com/oauth'
 export const profile_url = `${oauthEndpoint}/user_info`
 
 export const storyblokIssuer = new Issuer({
-    issuer: 'storyblok',
-    authorization_endpoint: require('grant/config/oauth.json').storyblok.authorize_url,
-    token_endpoint: require('grant/config/oauth.json').storyblok.access_url,
-    userinfo_endpoint: profile_url,
+  issuer: 'storyblok',
+  authorization_endpoint: 'https://app.storyblok.com/oauth/authorize',
+  token_endpoint: "https://app.storyblok.com/oauth/token",
+  userinfo_endpoint: profile_url,
 })

src/utils/cookie/get-cookie.ts

@@ -1,29 +1,18 @@
 import http from "http";
 
-
-/**
- * Cache for generated name regular expressions.
- */
-
-const REGEXP_CACHE = Object.create(null)
-
 /**
  * RegExp to match all characters to escape in a RegExp.
  */
 
 const REGEXP_ESCAPE_CHARS_REGEXP = /[\^$\\.*+?()[\]{}|]/g
 
-function getPattern (name: string) {
-  if (!REGEXP_CACHE[name]) {
-    REGEXP_CACHE[name] = new RegExp(
-      '(?:^|;) *' +
-      name.replace(REGEXP_ESCAPE_CHARS_REGEXP, '\\$&') +
-      '=([^;]*)'
-    )
-  }
-
-  return REGEXP_CACHE[name]
-}
+const getPattern = (name: string) => (
+  new RegExp(
+    '(?:^|;) *' +
+    name.replace(REGEXP_ESCAPE_CHARS_REGEXP, '\\$&') +
+    '=([^;]*)'
+  )
+)
 
 export const getCookie = (request: http.IncomingMessage, name: string): string | undefined => {
   const header = request.headers["cookie"]