| 1 | import { throttle } from 'async-agent';
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| 2 | import { Queue } from 'type-enforcer';
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| 3 |
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| 4 | export default class PriorityQueue extends Queue {
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| 5 | constructor() {
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| 6 | super();
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| 7 |
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| 8 | const self = this;
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| 9 | self._currentCallTotal = 0;
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| 10 | self._check = throttle(
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| 11 | () => {
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| 12 | if (self._currentCallTotal === 0 && self.length !== 0) {
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| 13 | self.triggerFirst();
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| 14 | }
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| 15 | },
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| 16 | 50,
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| 17 | { leading: false }
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| 18 | );
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| 19 | }
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| 20 |
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| 21 | add(callback) {
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| 22 | super.add(callback);
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| 23 | this._check();
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| 24 | }
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| 25 |
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| 26 | callStarted() {
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| 27 | ++this._currentCallTotal;
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| 28 | }
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| 29 |
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| 30 | callDone() {
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| 31 | --this._currentCallTotal;
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| 32 | this._check();
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| 33 | }
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| 34 | }
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