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/** PURE_IMPORTS_START tslib,_util_tryCatch,_util_errorObject,_OuterSubscriber,_util_subscribeToResult PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { tryCatch } from '../util/tryCatch';
import { errorObject } from '../util/errorObject';
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
export function expand(project, concurrent, scheduler) {
if (concurrent === void 0) {
concurrent = Number.POSITIVE_INFINITY;
}
if (scheduler === void 0) {
scheduler = undefined;
}
concurrent = (concurrent || 0) < 1 ? Number.POSITIVE_INFINITY : concurrent;
return function (source) { return source.lift(new ExpandOperator(project, concurrent, scheduler)); };
}
var ExpandOperator = /*@__PURE__*/ (function () {
function ExpandOperator(project, concurrent, scheduler) {
this.project = project;
this.concurrent = concurrent;
this.scheduler = scheduler;
}
ExpandOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new ExpandSubscriber(subscriber, this.project, this.concurrent, this.scheduler));
};
return ExpandOperator;
}());
export { ExpandOperator };
var ExpandSubscriber = /*@__PURE__*/ (function (_super) {
tslib_1.__extends(ExpandSubscriber, _super);
function ExpandSubscriber(destination, project, concurrent, scheduler) {
var _this = _super.call(this, destination) || this;
_this.project = project;
_this.concurrent = concurrent;
_this.scheduler = scheduler;
_this.index = 0;
_this.active = 0;
_this.hasCompleted = false;
if (concurrent < Number.POSITIVE_INFINITY) {
_this.buffer = [];
}
return _this;
}
ExpandSubscriber.dispatch = function (arg) {
var subscriber = arg.subscriber, result = arg.result, value = arg.value, index = arg.index;
subscriber.subscribeToProjection(result, value, index);
};
ExpandSubscriber.prototype._next = function (value) {
var destination = this.destination;
if (destination.closed) {
this._complete();
return;
}
var index = this.index++;
if (this.active < this.concurrent) {
destination.next(value);
var result = tryCatch(this.project)(value, index);
if (result === errorObject) {
destination.error(errorObject.e);
}
else if (!this.scheduler) {
this.subscribeToProjection(result, value, index);
}
else {
var state = { subscriber: this, result: result, value: value, index: index };
var destination_1 = this.destination;
destination_1.add(this.scheduler.schedule(ExpandSubscriber.dispatch, 0, state));
}
}
else {
this.buffer.push(value);
}
};
ExpandSubscriber.prototype.subscribeToProjection = function (result, value, index) {
this.active++;
var destination = this.destination;
destination.add(subscribeToResult(this, result, value, index));
};
ExpandSubscriber.prototype._complete = function () {
this.hasCompleted = true;
if (this.hasCompleted && this.active === 0) {
this.destination.complete();
}
this.unsubscribe();
};
ExpandSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
this._next(innerValue);
};
ExpandSubscriber.prototype.notifyComplete = function (innerSub) {
var buffer = this.buffer;
var destination = this.destination;
destination.remove(innerSub);
this.active--;
if (buffer && buffer.length > 0) {
this._next(buffer.shift());
}
if (this.hasCompleted && this.active === 0) {
this.destination.complete();
}
};
return ExpandSubscriber;
}(OuterSubscriber));
export { ExpandSubscriber };
//# sourceMappingURL=expand.js.map
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