| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| import { localStorageGet, LocalStorageKeys, localStorageSet } from '../utils'; |
| |
| export class LocalStorageBackedArray<T> { |
| key: LocalStorageKeys; |
| storedArray: T[]; |
| |
| constructor(key: LocalStorageKeys, array?: T[]) { |
| this.key = key; |
| if (!Array.isArray(array)) { |
| this.storedArray = this.getDataFromStorage(); |
| } else { |
| this.storedArray = array; |
| this.setDataInStorage(); |
| } |
| } |
| |
| private getDataFromStorage(): T[] { |
| try { |
| const possibleArray: any = JSON.parse(String(localStorageGet(this.key))); |
| if (!Array.isArray(possibleArray)) return []; |
| return possibleArray; |
| } catch { |
| return []; |
| } |
| } |
| |
| private setDataInStorage(): void { |
| localStorageSet(this.key, JSON.stringify(this.storedArray)); |
| } |
| |
| toggle(value: T): LocalStorageBackedArray<T> { |
| let toggledArray; |
| if (this.storedArray.includes(value)) { |
| toggledArray = this.storedArray.filter(c => c !== value); |
| } else { |
| toggledArray = this.storedArray.concat(value); |
| } |
| return new LocalStorageBackedArray<T>(this.key, toggledArray); |
| } |
| |
| exists(value: T): boolean { |
| return !this.storedArray.includes(value); |
| } |
| } |