/* eslint-disable no-underscore-dangle */
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'use strict';
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const { Transform } = require('stream');
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class JSONParser extends Transform {
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constructor(options = {}) {
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super({ readableObjectMode: true });
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this.chunks = [];
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this.globalOptions = { ...options };
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}
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_transform(chunk, encoding, callback) {
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this.chunks.push(String(chunk)); // todo consider using a string decoder
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callback();
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}
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_flush(callback) {
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try {
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const fields = JSON.parse(this.chunks.join(''));
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Object.keys(fields).forEach((key) => {
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const value = fields[key];
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this.push({ key, value });
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});
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} catch (e) {
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callback(e);
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return;
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}
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this.chunks = null;
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callback();
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}
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}
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module.exports = JSONParser;
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