Read a file in FuseJS (or create it if it doesn't exist)

read_a_file.js

var Storage = require('FuseJS/Storage');
var Observable = require('FuseJS/Observable');
var shots = Observable();
var readSuccessful;

var readFun = function (result) {
  readSuccessful = true;
  var parsed = JSON.parse(result);
  var count = parsed.length;
  shots.replaceAll(parsed.map(function (it) { return new Shot(it) }));
};

var readCatchFun = function (err) {
  readSuccessful = false;
  if (/File does not exist/i.test(err)) {
    console.log('Storage file did not exist, creating one (with dummy stuff included).');

    var _shots = [
      new Shot({ name: 'dummy', iso: 100, exposure: 0.125, aperture: 2.8 }).toJSON(),
      new Shot({ name: 'Another', iso: 200, exposure: 0.005, aperture: 8 }).toJSON(),
      new Shot({ name: 'Third', iso: 800, exposure: 30, aperture: 16 }).toJSON()
    ];

    Storage.write(settings.stores.shotStore, JSON.stringify(_shots)).then(function (result) {
      if (result) console.log('Successfully created new storage file; ' + settings.stores.shotStore);
    }).catch(function (_err) {
      console.log('Failed to create storage file; ' + _err);
    })
  }
};

var read = function () {
  Storage
    .read(settings.stores.shotStore)
    .then(readFun)
    .catch(readCatchFun);
}

read();