1 | import { Observable } from "observable-fns";
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2 | export { Observable };
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3 | const $observers = Symbol("observers");
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4 |
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5 |
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6 |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 |
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13 | export class Subject extends Observable {
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14 | constructor() {
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15 | super(observer => {
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16 | this[$observers] = [
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17 | ...(this[$observers] || []),
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18 | observer
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19 | ];
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20 | const unsubscribe = () => {
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21 | this[$observers] = this[$observers].filter(someObserver => someObserver !== observer);
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22 | };
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23 | return unsubscribe;
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24 | });
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25 | this[$observers] = [];
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26 | }
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27 | complete() {
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28 | this[$observers].forEach(observer => observer.complete());
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29 | }
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30 | error(error) {
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31 | this[$observers].forEach(observer => observer.error(error));
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32 | }
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33 | next(value) {
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34 | this[$observers].forEach(observer => observer.next(value));
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35 | }
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36 | }
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