Feature/enforce license notice in each file via eslint rule (#304)

* [ESLint] Add "eslint-plugin-header" as dev dependency

* [ESLint::eslint-plugin-header] Setup rule

* [ESLint::eslint-plugin-header] Fix errors

src/util/client.tsx

@@ -3,7 +3,8 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
 
 import axios from 'axios';
 import useSWR, { SWRConfiguration, SWRResponse } from 'swr';

src/util/cloneObject.tsx

@@ -3,7 +3,8 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
 
 export default function cloneObject<T extends object>(obj: T) {
     return JSON.parse(JSON.stringify(obj)) as T;

src/util/date.ts

@@ -5,6 +5,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  */
+
 import { t } from 'i18next';
 
 export const isWithinLastXMillis = (date: Date, timeMS: number) => {

src/util/language.tsx

@@ -3,7 +3,9 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 import { t } from 'i18next';
 
 export enum DefaultLanguage {

src/util/localStorage.tsx

@@ -3,7 +3,8 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
 
 function getItem<T>(key: string, defaultValue: T): T {
     const item = window.localStorage.getItem(key);

src/util/searchSettings.ts

@@ -1,3 +1,11 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 import { useQuery } from 'util/client';
 import { getMetadataFrom } from 'util/metadata';
 import { Metadata, ISearchSettings } from 'typings';

src/util/useBackTo.ts

@@ -3,7 +3,8 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
 
 import { useNavBarContext } from 'components/context/NavbarContext';
 import { useLocation } from 'react-router-dom';

src/util/useLocalStorage.tsx

@@ -3,7 +3,8 @@
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
 
 import React, { useState, Dispatch, SetStateAction, useReducer, Reducer, useCallback } from 'react';
 import storage from 'util/localStorage';