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