hook.io microservice for generating fake data for 100ideas/storyprinter

hookio-fakerjs-storyprinter.js

// Simple microservice for generating fake data for 100ideas/storyprinter
// https://hook.io/100ideas/fakerjs-storyprinter?numstories=5
//
// faker.js docs - http://github.com/marak/faker.js 

module['exports'] = function fakeData (hook) {
  let faker = require('faker');
  let params = hook.params;
  let numStories = hook.params.numstories || 15;

  // Get random number from Poisson distribution (lambda=1). Handy for mocking 
  // user activity volume.
  //   - https://stackoverflow.com/a/1241605
  const simplePoisson = function() {
    let L = Math.exp(-1);
    let p = 1.0;
    let k = 0;
    do {
      console.log(`L: ${L}, p: ${p}, k: ${k}`)
      k++;
      p *= Math.random();
    } while (p > L);
    console.log(`DONE. L: ${L}, p: ${p}, k: ${k}`)
    return k -1
  }

  const randImgH = () => Math.floor(Math.random() * (800-384) + 384)
  
  // supports multiple locales
  faker.locale = 'en'; // try: 'de', 'es'
  
  let result = [];
 
  for(let i=numStories; i>0; i--){
    result.push({
      ID: faker.random.uuid(),
      author: {
        name: faker.name.firstName(),
        avatarImg: faker.internet.avatar(),
      },
      role: `As a ${faker.name.jobTitle()},`,
      need: `I need ${faker.company.bs()},`,
      benefit: `so we can ${faker.company.bsBuzz()} our ${faker.company.catchPhrase()}`,
      category: faker.company.bsAdjective(),
      comments: new Array(simplePoisson()).fill('').map(x => faker.hacker.phrase()),
      createdAt: faker.date.past(),
      updatedAt: faker.date.recent(),
//       rasterizedImg: faker.image.business(384, 700, true),
      rasterizedImg: faker.image.business(384, randImgH(), true),
      printed: faker.random.boolean()
    })
  }
  
  hook.res.end(JSON.stringify(result, true, 2));
};

schema.js

{
  "numstories": {
    "type": "number",
    "min": 0,
    "max": 64
  }
}