wishthis/node_modules/rxjs/dist/esm/internal/operators/timeout.js

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2022-04-07 07:06:43 +00:00
import { asyncScheduler } from '../scheduler/async';
import { isValidDate } from '../util/isDate';
import { operate } from '../util/lift';
import { innerFrom } from '../observable/innerFrom';
import { createErrorClass } from '../util/createErrorClass';
import { createOperatorSubscriber } from './OperatorSubscriber';
import { executeSchedule } from '../util/executeSchedule';
export const TimeoutError = createErrorClass((_super) => function TimeoutErrorImpl(info = null) {
_super(this);
this.message = 'Timeout has occurred';
this.name = 'TimeoutError';
this.info = info;
});
export function timeout(config, schedulerArg) {
const { first, each, with: _with = timeoutErrorFactory, scheduler = schedulerArg !== null && schedulerArg !== void 0 ? schedulerArg : asyncScheduler, meta = null, } = (isValidDate(config) ? { first: config } : typeof config === 'number' ? { each: config } : config);
if (first == null && each == null) {
throw new TypeError('No timeout provided.');
}
return operate((source, subscriber) => {
let originalSourceSubscription;
let timerSubscription;
let lastValue = null;
let seen = 0;
const startTimer = (delay) => {
timerSubscription = executeSchedule(subscriber, scheduler, () => {
try {
originalSourceSubscription.unsubscribe();
innerFrom(_with({
meta,
lastValue,
seen,
})).subscribe(subscriber);
}
catch (err) {
subscriber.error(err);
}
}, delay);
};
originalSourceSubscription = source.subscribe(createOperatorSubscriber(subscriber, (value) => {
timerSubscription === null || timerSubscription === void 0 ? void 0 : timerSubscription.unsubscribe();
seen++;
subscriber.next((lastValue = value));
each > 0 && startTimer(each);
}, undefined, undefined, () => {
if (!(timerSubscription === null || timerSubscription === void 0 ? void 0 : timerSubscription.closed)) {
timerSubscription === null || timerSubscription === void 0 ? void 0 : timerSubscription.unsubscribe();
}
lastValue = null;
}));
!seen && startTimer(first != null ? (typeof first === 'number' ? first : +first - scheduler.now()) : each);
});
}
function timeoutErrorFactory(info) {
throw new TimeoutError(info);
}
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