react-mapfilter/fixtures/transform.js

const fc = require('./example_fc.json')
const fs = require('fs')
const path = require('path')
const LoremIpsum = require('lorem-ipsum').LoremIpsum

const lorem = new LoremIpsum({
  sentencesPerParagraph: {
    max: 3,
    min: 1
  },
  wordsPerSentence: {
    max: 9,
    min: 4
  }
})

const observations = fc.features.map(f => {
  const observation = {
    id: f.id,
    lon: f.geometry && f.geometry.coordinates[0],
    lat: f.geometry && f.geometry.coordinates[1],
    created_at: f.properties.start,
    attachments: Array(randomInt(5))
      .fill()
      .map(() => ({
        id: randomId() + '.jpg',
        type: 'image/jpg'
      })),
    tags: {}
  }
  const omit = ['id', 'picture', 'pictures']

  for (const key in f.properties) {
    if (omit.includes(key)) continue
    if (Array.isArray(f.properties[key])) continue
    observation.tags[key] = f.properties[key]
  }
  observation.tags.notes = lorem.generateParagraphs(1)
  if (f.properties.happening && f.properties.happening[0]) {
    observation.tags.categoryId = f.properties.happening[0]
  }

  return observation
})

function randomInt(max) {
  return Math.ceil(Math.random() * max)
}

function randomId() {
  return Math.ceil(Math.random() * Math.pow(2, 32)).toString(16)
}

fs.writeFileSync(
  path.join(__dirname, '/observations.json'),
  JSON.stringify(observations, null, 2)
)