79 lines
No EOL
2.4 KiB
JavaScript
79 lines
No EOL
2.4 KiB
JavaScript
import { Action } from './Action';
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import { intervalProvider } from './intervalProvider';
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import { arrRemove } from '../util/arrRemove';
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export class AsyncAction extends Action {
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constructor(scheduler, work) {
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super(scheduler, work);
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this.scheduler = scheduler;
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this.work = work;
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this.pending = false;
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}
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schedule(state, delay = 0) {
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if (this.closed) {
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return this;
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}
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this.state = state;
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const id = this.id;
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const scheduler = this.scheduler;
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if (id != null) {
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this.id = this.recycleAsyncId(scheduler, id, delay);
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}
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this.pending = true;
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this.delay = delay;
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this.id = this.id || this.requestAsyncId(scheduler, this.id, delay);
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return this;
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}
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requestAsyncId(scheduler, _id, delay = 0) {
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return intervalProvider.setInterval(scheduler.flush.bind(scheduler, this), delay);
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}
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recycleAsyncId(_scheduler, id, delay = 0) {
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if (delay != null && this.delay === delay && this.pending === false) {
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return id;
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}
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intervalProvider.clearInterval(id);
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return undefined;
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}
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execute(state, delay) {
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if (this.closed) {
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return new Error('executing a cancelled action');
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}
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this.pending = false;
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const error = this._execute(state, delay);
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if (error) {
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return error;
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}
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else if (this.pending === false && this.id != null) {
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this.id = this.recycleAsyncId(this.scheduler, this.id, null);
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}
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}
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_execute(state, _delay) {
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let errored = false;
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let errorValue;
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try {
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this.work(state);
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}
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catch (e) {
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errored = true;
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errorValue = e ? e : new Error('Scheduled action threw falsy error');
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}
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if (errored) {
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this.unsubscribe();
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return errorValue;
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}
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}
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unsubscribe() {
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if (!this.closed) {
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const { id, scheduler } = this;
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const { actions } = scheduler;
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this.work = this.state = this.scheduler = null;
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this.pending = false;
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arrRemove(actions, this);
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if (id != null) {
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this.id = this.recycleAsyncId(scheduler, id, null);
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}
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this.delay = null;
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super.unsubscribe();
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}
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}
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}
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//# sourceMappingURL=AsyncAction.js.map
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