@ezs/basics/lib/zip-extract.js

Basics statements for EZS

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = ZIPExtract;
var _unzipper = _interopRequireDefault(require("unzipper"));
var _micromatch = _interopRequireDefault(require("micromatch"));
var _streamWrite = _interopRequireDefault(require("stream-write"));
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
/**
 * Take the content of a zip file, extract some files.
 * The JSON object is sent to the output stream for each file.
 * It returns to the output stream
 *
 * ```json
 * {
 *    "id": "file name",
 *    "value": "file contents"
 * }
 * ```
 *
 * @name ZIPExtract
 * @param {String} [path="**\/*.json"] Regex to select the files to extract
 * @returns {{id: String, value: String}[]}
 */
function ZIPExtract(data, feed) {
  const filesPatern = this.getParam('path', '**/*.json');
  if (this.isFirst()) {
    const {
      ezs
    } = this;
    this.input = ezs.createStream(ezs.objectMode());
    this.output = ezs.createStream(ezs.objectMode());
    this.whenEnd = this.input.pipe(_unzipper.default.Parse()).on('entry', async entry => {
      if (_micromatch.default.isMatch(entry.path, filesPatern)) {
        const content = await entry.buffer();
        return (0, _streamWrite.default)(this.output, {
          id: entry.path,
          value: content
        }, () => entry.autodrain());
      }
      return entry.autodrain();
    }).promise();
    this.whenFinish = feed.flow(this.output);
  }
  if (this.isLast()) {
    this.whenEnd.finally(() => this.output.end());
    this.whenFinish.finally(() => feed.close());
    this.input.end();
  } else {
    (0, _streamWrite.default)(this.input, data, () => feed.end());
  }
}