file-state-monitor/dist/states/SizeState.js

Completely customizable file monitoring using states

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _fs = _interopRequireDefault(require("fs"));

var _BaseFileState = _interopRequireDefault(require("./BaseFileState"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * A file state using size of the file to detect changes
 */
class SizeState extends _BaseFileState.default {
  /**
   * Constructs a new file size aware state
   *
   * @param {Object} fileInfo Object containing existing state data
   */
  constructor(fileInfo) {
    super(fileInfo);

    if (Object.keys(fileInfo).length === 1) {
      let stat = _fs.default.statSync(this.path);

      this._size = stat.size;
    }
  }
  /**
   * Gets the size of the file
   *
   * @return {number} Size of the file in bytes
   */


  get size() {
    return this._size;
  }
  /**
   * Checks if this file state is different than another by comparing their
   * file size
   *
   * @param {BaseFileState} otherState Other file state to check against
   * @return {boolean} True if the two file states are different, false if not
   */


  isDifferentThan(otherState) {
    if (this.path !== otherState.path) {
      throw new Error(`Can only compare files with the same path, but tried to compare ${this._path} with ${otherState.path}`);
    }

    return this.size !== otherState.size;
  }
  /**
   * @inheritdoc
   */


  toJson() {
    return {
      path: this.path,
      size: this.size
    };
  }

}

exports.default = SizeState;