react-inline-for-rix-loader/lib/utils/DiskCache.js

for developing webpack rix-loader, folk from https://github.com/martinandert/react-inline

'use strict';

var _classCallCheck = require('babel-runtime/helpers/class-call-check')['default'];

var _Object$keys = require('babel-runtime/core-js/object/keys')['default'];

var _interopRequireDefault = require('babel-runtime/helpers/interop-require-default')['default'];

exports.__esModule = true;

var _fs = require('fs');

var _fs2 = _interopRequireDefault(_fs);

var _path = require('path');

var _path2 = _interopRequireDefault(_path);

var _mkdirp = require('mkdirp');

var _mkdirp2 = _interopRequireDefault(_mkdirp);

var hasOwnProperty = Object.prototype.hasOwnProperty;

function remove(filePath) {
  if (_fs2['default'].existsSync(filePath)) {
    _fs2['default'].unlinkSync(filePath);
  }
}

function load(filePath) {
  if (!_fs2['default'].existsSync(filePath)) {
    _mkdirp2['default'].sync(_path2['default'].dirname(filePath));
    store({}, filePath);
    return {};
  }

  var data = _fs2['default'].readFileSync(filePath, { encoding: 'utf8' });

  return JSON.parse(data);
}

function store(data, filePath) {
  _fs2['default'].writeFileSync(filePath, JSON.stringify(data));
}

var DiskCache = (function () {
  function DiskCache(name, options) {
    _classCallCheck(this, DiskCache);

    this.filePath = _path2['default'].resolve(_path2['default'].join(options.cacheDir, name + '.json'));

    this.fetch.bind(this);
    this.clear.bind(this);
  }

  DiskCache.prototype.fetch = function fetch(key, miss) {
    var cache = load(this.filePath);

    if (hasOwnProperty.call(cache, key)) {
      return cache[key];
    }

    cache[key] = miss(_Object$keys(cache));

    store(cache, this.filePath);

    return cache[key];
  };

  DiskCache.prototype.clear = function clear() {
    remove(this.filePath);
  };

  return DiskCache;
})();

exports['default'] = DiskCache;
module.exports = exports['default'];