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import { operate } from '../util/lift';
import { noop } from '../util/noop';
import { createOperatorSubscriber } from './OperatorSubscriber';
import { innerFrom } from '../observable/innerFrom';
export function debounce(durationSelector) {
return operate(function (source, subscriber) {
var hasValue = false;
var lastValue = null;
var durationSubscriber = null;
var emit = function () {
durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();
durationSubscriber = null;
if (hasValue) {
hasValue = false;
var value = lastValue;
lastValue = null;
subscriber.next(value);
}
};
source.subscribe(createOperatorSubscriber(subscriber, function (value) {
durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();
hasValue = true;
lastValue = value;
durationSubscriber = createOperatorSubscriber(subscriber, emit, noop);
innerFrom(durationSelector(value)).subscribe(durationSubscriber);
}, function () {
emit();
subscriber.complete();
}, undefined, function () {
lastValue = durationSubscriber = null;
}));
});
}
//# sourceMappingURL=debounce.js.map
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