@ngx-pwa/local-storage
Version:
Efficient local storage module for Angular: simple API based on native localStorage API, but internally stored via the asynchronous IndexedDB API for performance, and wrapped in RxJS observables to be homogeneous with other Angular modules.
82 lines • 7.9 kB
JavaScript
import { Injectable } from '@angular/core';
import { of, from } from 'rxjs';
import * as i0 from "@angular/core";
export class MemoryDatabase {
constructor() {
/**
* Memory storage
*/
this.memoryStorage = new Map();
}
/**
* Number of items in memory
*/
get size() {
/* Wrap in a RxJS `Observable` to be consistent with other storages */
return of(this.memoryStorage.size);
}
/**
* Gets an item value in memory
* @param key The item's key
* @returns The item's value if the key exists, `undefined` otherwise, wrapped in a RxJS `Observable`
*/
get(key) {
const rawData = this.memoryStorage.get(key);
/* Wrap in a RxJS `Observable` to be consistent with other storages */
return of(rawData);
}
/**
* Sets an item in memory
* @param key The item's key
* @param data The item's value
* @returns A RxJS `Observable` to wait the end of the operation
*/
set(key, data) {
this.memoryStorage.set(key, data);
/* Wrap in a RxJS `Observable` to be consistent with other storages */
return of(undefined);
}
/**
* Deletes an item in memory
* @param key The item's key
* @returns A RxJS `Observable` to wait the end of the operation
*/
delete(key) {
this.memoryStorage.delete(key);
/* Wrap in a RxJS `Observable` to be consistent with other storages */
return of(undefined);
}
/**
* Deletes all items in memory
* @returns A RxJS `Observable` to wait the end of the operation
*/
clear() {
this.memoryStorage.clear();
/* Wrap in a RxJS `Observable` to be consistent with other storages */
return of(undefined);
}
/**
* Get all keys in memory
* @returns A RxJS `Observable` iterating on keys
*/
keys() {
/* Create an `Observable` from keys */
return from(this.memoryStorage.keys());
}
/**
* Check if a key exists in memory
* @param key Key name
* @returns a RxJS `Observable` telling if the key exists or not
*/
has(key) {
/* Wrap in a RxJS `Observable` to be consistent with other storages */
return of(this.memoryStorage.has(key));
}
}
MemoryDatabase.ɵprov = i0.ɵɵdefineInjectable({ factory: function MemoryDatabase_Factory() { return new MemoryDatabase(); }, token: MemoryDatabase, providedIn: "root" });
MemoryDatabase.decorators = [
{ type: Injectable, args: [{
providedIn: 'root'
},] }
];
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lmIHRoZSBrZXkgZXhpc3RzIG9yIG5vdFxuICAgKi9cbiAgaGFzKGtleTogc3RyaW5nKTogT2JzZXJ2YWJsZTxib29sZWFuPiB7XG5cbiAgICAvKiBXcmFwIGluIGEgUnhKUyBgT2JzZXJ2YWJsZWAgdG8gYmUgY29uc2lzdGVudCB3aXRoIG90aGVyIHN0b3JhZ2VzICovXG4gICAgcmV0dXJuIG9mKHRoaXMubWVtb3J5U3RvcmFnZS5oYXMoa2V5KSk7XG5cbiAgfVxuXG59XG4iXX0=