1 | /** PURE_IMPORTS_START tslib,_Subscriber PURE_IMPORTS_END */
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2 | import * as tslib_1 from "tslib";
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3 | import { Subscriber } from '../Subscriber';
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4 | export function defaultIfEmpty(defaultValue) {
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5 | if (defaultValue === void 0) {
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6 | defaultValue = null;
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7 | }
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8 | return function (source) { return source.lift(new DefaultIfEmptyOperator(defaultValue)); };
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9 | }
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10 | var DefaultIfEmptyOperator = /*@__PURE__*/ (function () {
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11 | function DefaultIfEmptyOperator(defaultValue) {
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12 | this.defaultValue = defaultValue;
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13 | }
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14 | DefaultIfEmptyOperator.prototype.call = function (subscriber, source) {
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15 | return source.subscribe(new DefaultIfEmptySubscriber(subscriber, this.defaultValue));
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16 | };
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17 | return DefaultIfEmptyOperator;
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18 | }());
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19 | var DefaultIfEmptySubscriber = /*@__PURE__*/ (function (_super) {
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20 | tslib_1.__extends(DefaultIfEmptySubscriber, _super);
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21 | function DefaultIfEmptySubscriber(destination, defaultValue) {
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22 | var _this = _super.call(this, destination) || this;
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23 | _this.defaultValue = defaultValue;
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24 | _this.isEmpty = true;
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25 | return _this;
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26 | }
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27 | DefaultIfEmptySubscriber.prototype._next = function (value) {
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28 | this.isEmpty = false;
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29 | this.destination.next(value);
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30 | };
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31 | DefaultIfEmptySubscriber.prototype._complete = function () {
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32 | if (this.isEmpty) {
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33 | this.destination.next(this.defaultValue);
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34 | }
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35 | this.destination.complete();
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36 | };
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37 | return DefaultIfEmptySubscriber;
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38 | }(Subscriber));
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39 | //# sourceMappingURL=defaultIfEmpty.js.map
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