generate-data.js

'use strict';

/***
  * dreamjs - fake data generator - https://github.com/adleroliveira/dreamjs
  * jsonfile - module for writing json data to file - https://www.npmjs.com/package/jsonfile
***/
const dream = require('dreamjs');
const jsonfile = require('jsonfile');

/***
  * path - output for generated file
  * amount - number of generated objects
  * phraseLength - number of words for phrase property
  * images - array of all available images
***/

const config = {
  path: './public/data.json',
  amount: 150,
  phraseLength: 15,
  images: ['cat', 'dog', 'fox', 'koala', 'lion', 'owl', 'penguin', 'pig', 'raccoon', 'sheep']
};

dream.customType('user-image', function (helper) {
  return helper.oneOf(config.images);
});

dream.customType('user-phrase', function (helper) {
  return helper.chance.sentence({words: config.phraseLength});
});

dream.customType('incrementalId', function(helper){
    return helper.previousItem ? helper.previousItem.id+1 : 0;
});

dream.schema('user', {
  id: 'incrementalId',
  name: 'name',
  age: 'age',
  phone: 'phone',
  image: 'user-image',
  phrase: 'user-phrase'
});

dream.useSchema('user')
  .generateRnd(config.amount)
  .output((err, result) => {
    jsonfile.writeFile(config.path, result, function(err) {
      console.log(err ? err : `Data was generated and placed to ${config.path}`);
    });
  });