1 | 'use strict';
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2 |
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3 | class CancelError extends Error {
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4 | constructor(message) {
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5 | super(message);
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6 | this.name = 'CancelError';
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7 | }
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8 | }
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9 |
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10 | const createDelay = willResolve => (ms, value) => {
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11 | let timeoutId;
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12 | let internalReject;
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13 |
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14 | const delayPromise = new Promise((resolve, reject) => {
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15 | internalReject = reject;
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16 |
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17 | timeoutId = setTimeout(() => {
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18 | const settle = willResolve ? resolve : reject;
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19 | settle(value);
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20 | }, ms);
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21 | });
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22 |
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23 | delayPromise.cancel = () => {
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24 | if (timeoutId) {
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25 | clearTimeout(timeoutId);
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26 | timeoutId = null;
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27 | internalReject(new CancelError('Delay canceled'));
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28 | }
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29 | };
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30 |
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31 | return delayPromise;
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32 | };
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33 |
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34 | module.exports = createDelay(true);
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35 | module.exports.reject = createDelay(false);
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36 | module.exports.CancelError = CancelError;
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