graphdb/lib/util/file-utils.js

Javascript client library supporting GraphDB and RDF4J REST API.

"use strict";

function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
var fs = require('fs');
var StringUtils = require('../util/string-utils');

/**
 * Utilities related to working with files and the file system.
 *
 * @class
 * @author Mihail Radkov
 * @author Svilen Velikov
 */
var FileUtils = /*#__PURE__*/function () {
  function FileUtils() {
    _classCallCheck(this, FileUtils);
  }
  return _createClass(FileUtils, null, [{
    key: "getReadStream",
    value:
    /**
     * Opens a readable stream from a file located at the provided file path.
     *
     * If the file path is blank or points to non existent file, the method will
     * result in an error.
     *
     * @param {string} filePath path to the file to be read
     * @return {ReadableStream} stream with the file data
     * @throws {Error} if the file path is not provided or no file exists for it
     */
    function getReadStream(filePath) {
      if (StringUtils.isBlank(filePath)) {
        throw new Error('File path is required');
      }
      if (!fs.existsSync(filePath)) {
        throw new Error('File does not exist for path=' + filePath);
      }
      return fs.createReadStream(filePath);
    }
  }]);
}();
module.exports = FileUtils;