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/** PURE_IMPORTS_START tslib,_scheduler_async,_util_isDate,_Subscriber,_Notification PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { async } from '../scheduler/async';
import { isDate } from '../util/isDate';
import { Subscriber } from '../Subscriber';
import { Notification } from '../Notification';
export function delay(delay, scheduler) {
if (scheduler === void 0) {
scheduler = async;
}
var absoluteDelay = isDate(delay);
var delayFor = absoluteDelay ? (+delay - scheduler.now()) : Math.abs(delay);
return function (source) { return source.lift(new DelayOperator(delayFor, scheduler)); };
}
var DelayOperator = /*@__PURE__*/ (function () {
function DelayOperator(delay, scheduler) {
this.delay = delay;
this.scheduler = scheduler;
}
DelayOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new DelaySubscriber(subscriber, this.delay, this.scheduler));
};
return DelayOperator;
}());
var DelaySubscriber = /*@__PURE__*/ (function (_super) {
tslib_1.__extends(DelaySubscriber, _super);
function DelaySubscriber(destination, delay, scheduler) {
var _this = _super.call(this, destination) || this;
_this.delay = delay;
_this.scheduler = scheduler;
_this.queue = [];
_this.active = false;
_this.errored = false;
return _this;
}
DelaySubscriber.dispatch = function (state) {
var source = state.source;
var queue = source.queue;
var scheduler = state.scheduler;
var destination = state.destination;
while (queue.length > 0 && (queue[0].time - scheduler.now()) <= 0) {
queue.shift().notification.observe(destination);
}
if (queue.length > 0) {
var delay_1 = Math.max(0, queue[0].time - scheduler.now());
this.schedule(state, delay_1);
}
else {
this.unsubscribe();
source.active = false;
}
};
DelaySubscriber.prototype._schedule = function (scheduler) {
this.active = true;
this.add(scheduler.schedule(DelaySubscriber.dispatch, this.delay, {
source: this, destination: this.destination, scheduler: scheduler
}));
};
DelaySubscriber.prototype.scheduleNotification = function (notification) {
if (this.errored === true) {
return;
}
var scheduler = this.scheduler;
var message = new DelayMessage(scheduler.now() + this.delay, notification);
this.queue.push(message);
if (this.active === false) {
this._schedule(scheduler);
}
};
DelaySubscriber.prototype._next = function (value) {
this.scheduleNotification(Notification.createNext(value));
};
DelaySubscriber.prototype._error = function (err) {
this.errored = true;
this.queue = [];
this.destination.error(err);
};
DelaySubscriber.prototype._complete = function () {
this.scheduleNotification(Notification.createComplete());
};
return DelaySubscriber;
}(Subscriber));
var DelayMessage = /*@__PURE__*/ (function () {
function DelayMessage(time, notification) {
this.time = time;
this.notification = notification;
}
return DelayMessage;
}());
//# sourceMappingURL=delay.js.map
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