| 1 | "use strict";
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| 2 | Object.defineProperty(exports, "__esModule", { value: true });
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| 3 | const stream_1 = require("stream");
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| 4 | const WAIT_THRESHOLD = 500;
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| 5 | class BatchStream extends stream_1.Transform {
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| 6 | constructor(options = {}) {
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| 7 | super();
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| 8 | this.bufferedBatch = null;
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| 9 | this.timeout = null;
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| 10 | this.waitThreshold = 0;
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| 11 | this.waitThreshold = options.wait || WAIT_THRESHOLD;
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| 12 | }
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| 13 | flush() {
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| 14 | if (this.bufferedBatch) {
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| 15 | this.push(this.bufferedBatch);
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| 16 | this.bufferedBatch = null;
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| 17 | }
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| 18 | if (this.timeout) {
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| 19 | clearTimeout(this.timeout);
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| 20 | this.timeout = null;
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| 21 | }
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| 22 | }
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| 23 | _transform(chunk, encoding, callback) {
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| 24 | if (this.bufferedBatch) {
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| 25 | this.bufferedBatch = Buffer.concat([this.bufferedBatch, chunk]);
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| 26 | }
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| 27 | else {
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| 28 | this.bufferedBatch = chunk;
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| 29 | }
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| 30 | if (this.timeout) {
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| 31 | clearTimeout(this.timeout);
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| 32 | }
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| 33 | this.timeout = setTimeout(() => {
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| 34 | this.flush();
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| 35 | }, this.waitThreshold);
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| 36 | callback();
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| 37 | }
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| 38 | _flush(callback) {
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| 39 | this.flush();
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| 40 | callback();
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| 41 | }
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| 42 | }
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| 43 | exports.default = BatchStream;
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