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* 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;
Eif (!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);
}
}
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