1// Copyright 2023 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 15import { TableColumn } from './interfaces'; 16import { ViewNode } from './view-node'; 17 18export interface LogViewerState { 19 rootNode: ViewNode; 20} 21 22export interface LogViewState { 23 searchText?: string; 24 columnData?: TableColumn[]; 25 viewTitle?: string; 26 wordWrap?: boolean; 27} 28 29interface StateStorage { 30 loadState(): LogViewerState | undefined; 31 saveState(state: LogViewerState): void; 32} 33 34export class LocalStateStorage implements StateStorage { 35 private readonly STATE_STORAGE_KEY = 'logViewerState'; 36 37 loadState(): LogViewerState | undefined { 38 const storedStateString = localStorage.getItem(this.STATE_STORAGE_KEY); 39 if (storedStateString) { 40 return JSON.parse(storedStateString); 41 } 42 return undefined; 43 } 44 45 saveState(state: LogViewerState) { 46 localStorage.setItem(this.STATE_STORAGE_KEY, JSON.stringify(state)); 47 } 48} 49 50export class StateService { 51 private store: StateStorage; 52 53 constructor(store: StateStorage) { 54 this.store = store; 55 } 56 57 loadState(): LogViewerState | undefined { 58 return this.store.loadState(); 59 } 60 61 saveState(state: LogViewerState) { 62 this.store.saveState(state); 63 } 64} 65