ngx-webstorage
Version:
This library provides an easy to use service to manage the web storages (local and session) from your Angular application. It provides also two decorators to synchronize the component attributes and the web storages.
50 lines • 6.36 kB
JavaScript
import { of, Subject } from 'rxjs';
import { CompatHelper } from '../helpers/compat';
export class BaseSyncStorageStrategy {
constructor(storage, cache) {
this.storage = storage;
this.cache = cache;
this.keyChanges = new Subject();
}
get isAvailable() {
if (this._isAvailable === undefined)
this._isAvailable = CompatHelper.isStorageAvailable(this.storage);
return this._isAvailable;
}
get(key) {
let data = this.cache.get(this.name, key);
if (data !== undefined)
return of(data);
try {
const item = this.storage.getItem(key);
if (item !== null) {
data = JSON.parse(item);
this.cache.set(this.name, key, data);
}
}
catch (err) {
console.warn(err);
}
return of(data);
}
set(key, value) {
const data = JSON.stringify(value);
this.storage.setItem(key, data);
this.cache.set(this.name, key, value);
this.keyChanges.next(key);
return of(value);
}
del(key) {
this.storage.removeItem(key);
this.cache.del(this.name, key);
this.keyChanges.next(key);
return of(null);
}
clear() {
this.storage.clear();
this.cache.clear(this.name);
this.keyChanges.next(null);
return of(null);
}
}
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