@jsonlines/core/es/stringify.js

parse and stringify jsonlines files through streams

import 'core-js/modules/es.array.iterator';
import 'core-js/modules/es.promise';
import { b as getLineSepString, _ as _classPrivateFieldSet, a as _classPrivateFieldGet } from './_chunks/line-sep-6e4e0e79.js';
import { Transform } from 'stream';
import { A as AsyncDuplexBase } from './_chunks/duplex-base-32ed1b65.js';

var _stringify = new WeakMap();

class JsonLinesStringifyStream extends Transform {
  constructor(options) {
    var _options$lineSep, _options$stringify;

    super({
      writableObjectMode: true
    });

    _stringify.set(this, {
      writable: true,
      value: void 0
    });

    this.encoding = options === null || options === void 0 ? void 0 : options.encoding;
    this.lineSep = getLineSepString((_options$lineSep = options === null || options === void 0 ? void 0 : options.lineSep) !== null && _options$lineSep !== void 0 ? _options$lineSep : "lf");

    _classPrivateFieldSet(this, _stringify, (_options$stringify = options === null || options === void 0 ? void 0 : options.stringify) !== null && _options$stringify !== void 0 ? _options$stringify : JSON.stringify);
  }

  async _transformAsync(chunk) {
    const str = await _classPrivateFieldGet(this, _stringify).call(this, chunk);
    const buf = Buffer.from(str + this.lineSep, this.encoding);
    this.push(buf);
  }

  _transform(chunk, encoding, callback) {
    this._transformAsync(chunk).then(() => callback()).catch(err => callback(err));
  }

}
class JsonLinesStringifyStreamWithGzip extends AsyncDuplexBase {
  constructor(options) {
    const gzip = options === null || options === void 0 ? void 0 : options.gzip;
    const stringifyStream = new JsonLinesStringifyStream(options);
    super({
      readable: gzip ? () => import('zlib').then(zlib => {
        const gzipStream = zlib.createGzip(gzip === true ? undefined : gzip);
        stringifyStream.pipe(gzipStream);
        return gzipStream;
      }) : stringifyStream,
      writable: stringifyStream
    }, {
      readableObjectMode: false,
      writableObjectMode: true
    });
  }

}
function stringify(options) {
  if (options === null || options === void 0 ? void 0 : options.gzip) {
    return new JsonLinesStringifyStreamWithGzip(options);
  } else {
    return new JsonLinesStringifyStream(options);
  }
}

export { JsonLinesStringifyStream, JsonLinesStringifyStreamWithGzip, stringify };
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