/** PURE_IMPORTS_START tslib,_innerSubscribe PURE_IMPORTS_END */
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import * as tslib_1 from "tslib";
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import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
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export function mergeScan(accumulator, seed, concurrent) {
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if (concurrent === void 0) {
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concurrent = Number.POSITIVE_INFINITY;
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}
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return function (source) { return source.lift(new MergeScanOperator(accumulator, seed, concurrent)); };
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}
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var MergeScanOperator = /*@__PURE__*/ (function () {
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function MergeScanOperator(accumulator, seed, concurrent) {
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this.accumulator = accumulator;
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this.seed = seed;
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this.concurrent = concurrent;
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}
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MergeScanOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new MergeScanSubscriber(subscriber, this.accumulator, this.seed, this.concurrent));
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};
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return MergeScanOperator;
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}());
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export { MergeScanOperator };
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var MergeScanSubscriber = /*@__PURE__*/ (function (_super) {
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tslib_1.__extends(MergeScanSubscriber, _super);
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function MergeScanSubscriber(destination, accumulator, acc, concurrent) {
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var _this = _super.call(this, destination) || this;
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_this.accumulator = accumulator;
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_this.acc = acc;
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_this.concurrent = concurrent;
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_this.hasValue = false;
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_this.hasCompleted = false;
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_this.buffer = [];
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_this.active = 0;
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_this.index = 0;
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return _this;
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}
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MergeScanSubscriber.prototype._next = function (value) {
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if (this.active < this.concurrent) {
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var index = this.index++;
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var destination = this.destination;
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var ish = void 0;
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try {
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var accumulator = this.accumulator;
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ish = accumulator(this.acc, value, index);
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}
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catch (e) {
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return destination.error(e);
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}
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this.active++;
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this._innerSub(ish);
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}
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else {
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this.buffer.push(value);
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}
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};
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MergeScanSubscriber.prototype._innerSub = function (ish) {
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var innerSubscriber = new SimpleInnerSubscriber(this);
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var destination = this.destination;
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destination.add(innerSubscriber);
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var innerSubscription = innerSubscribe(ish, innerSubscriber);
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if (innerSubscription !== innerSubscriber) {
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destination.add(innerSubscription);
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}
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};
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MergeScanSubscriber.prototype._complete = function () {
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this.hasCompleted = true;
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if (this.active === 0 && this.buffer.length === 0) {
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if (this.hasValue === false) {
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this.destination.next(this.acc);
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}
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this.destination.complete();
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}
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this.unsubscribe();
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};
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MergeScanSubscriber.prototype.notifyNext = function (innerValue) {
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var destination = this.destination;
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this.acc = innerValue;
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this.hasValue = true;
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destination.next(innerValue);
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};
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MergeScanSubscriber.prototype.notifyComplete = function () {
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var buffer = this.buffer;
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this.active--;
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if (buffer.length > 0) {
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this._next(buffer.shift());
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}
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else if (this.active === 0 && this.hasCompleted) {
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if (this.hasValue === false) {
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this.destination.next(this.acc);
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}
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this.destination.complete();
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}
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};
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return MergeScanSubscriber;
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}(SimpleOuterSubscriber));
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export { MergeScanSubscriber };
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//# sourceMappingURL=mergeScan.js.map
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