tap.js
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import { isFunction } from '../util/isFunction';
import { operate } from '../util/lift';
import { createOperatorSubscriber } from './OperatorSubscriber';
import { identity } from '../util/identity';
export function tap(observerOrNext, error, complete) {
var tapObserver = isFunction(observerOrNext) || error || complete
?
{ next: observerOrNext, error: error, complete: complete }
: observerOrNext;
return tapObserver
? operate(function (source, subscriber) {
var _a;
(_a = tapObserver.subscribe) === null || _a === void 0 ? void 0 : _a.call(tapObserver);
var isUnsub = true;
source.subscribe(createOperatorSubscriber(subscriber, function (value) {
var _a;
(_a = tapObserver.next) === null || _a === void 0 ? void 0 : _a.call(tapObserver, value);
subscriber.next(value);
}, function () {
var _a;
isUnsub = false;
(_a = tapObserver.complete) === null || _a === void 0 ? void 0 : _a.call(tapObserver);
subscriber.complete();
}, function (err) {
var _a;
isUnsub = false;
(_a = tapObserver.error) === null || _a === void 0 ? void 0 : _a.call(tapObserver, err);
subscriber.error(err);
}, function () {
var _a, _b;
if (isUnsub) {
(_a = tapObserver.unsubscribe) === null || _a === void 0 ? void 0 : _a.call(tapObserver);
}
(_b = tapObserver.finalize) === null || _b === void 0 ? void 0 : _b.call(tapObserver);
}));
})
:
identity;
}
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