@activejs/core
Version:
Pragmatic, Reactive State Management for JavaScript Apps
36 lines • 8.15 kB
JavaScript
import { GenericUnit } from './generic-unit';
import { BoolUnit } from './bool-unit';
import { generateAsyncSystemIds } from '../utils/funcs';
import { AsyncSystemBase } from './async-system-base';
import { Configuration } from './configuration';
/**
* AsyncSystem is a reactive storage System, to store, replay and wait for simple async tasks.
*
* An AsyncSystem is a systematic combination of four Units.
* one each for every aspect of an asynchronous task or API, \
* e.g.: XHR, fetch or a third party abstraction like Angular's HttpClient.
*
* See {@link https://docs.activejs.dev/fundamentals/systems/asyncsystem} for more details.
*
* - AsyncSystem extends {@link AsyncSystemBase},
* which further extends {@link Base} and `Observable`
*
* @category 3. Systems
*/
export class AsyncSystem extends AsyncSystemBase {
constructor(config) {
super(...(() => {
config = Object.assign(Object.assign({}, Configuration.ASYNC_SYSTEM), config);
const { id: systemId, initialValue, QUERY_UNIT, DATA_UNIT, ERROR_UNIT, PENDING_UNIT, UNITS, } = config;
const { queryUnitId, dataUnitId, errorUnitId, pendingUnitId } = generateAsyncSystemIds(systemId, QUERY_UNIT, DATA_UNIT, ERROR_UNIT, PENDING_UNIT);
// no need to check these, as Units ignore undefined as initialValue anyway
const { query, data, error, pending } = initialValue || {};
const queryUnit = new GenericUnit(Object.assign(Object.assign(Object.assign({ initialValue: query }, UNITS), QUERY_UNIT), { id: queryUnitId }));
const dataUnit = new GenericUnit(Object.assign(Object.assign(Object.assign({ initialValue: data }, UNITS), DATA_UNIT), { id: dataUnitId }));
const errorUnit = new GenericUnit(Object.assign(Object.assign(Object.assign({ initialValue: error }, UNITS), ERROR_UNIT), { id: errorUnitId }));
const pendingUnit = new BoolUnit(Object.assign(Object.assign(Object.assign({ initialValue: pending }, UNITS), PENDING_UNIT), { id: pendingUnitId }));
return [queryUnit, dataUnit, errorUnit, pendingUnit, config];
})());
}
}
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