1// Copyright 2022 The Pigweed Authors 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); you may not 4// use this file except in compliance with the License. You may obtain a copy of 5// the License at 6// 7// https://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12// License for the specific language governing permissions and limitations under 13// the License. 14 15export default class LocalStorageArray { 16 data: string[] = []; 17 maxSize: number; 18 key = '__pw_repl_history'; 19 20 constructor(maxSize = 4) { 21 this.maxSize = maxSize; 22 const curHistory = localStorage.getItem(this.key); 23 if (curHistory) { 24 this.data = JSON.parse(localStorage.getItem(this.key)!); 25 } 26 } 27 28 unshift(data: string) { 29 this.data.unshift(data); 30 if (this.data.length > this.maxSize) { 31 this.data = this.data.slice(0, this.maxSize); 32 } 33 localStorage.setItem(this.key, JSON.stringify(this.data)); 34 } 35 36 clear() { 37 this.data = []; 38 localStorage.removeItem(this.key); 39 } 40} 41