sortby/index.js

const sortby = (properties) => (a, b) => {
  // 'base' treat accent as there base character
  const collator = new Intl.Collator('en', { numeric: true, sensitivity: 'base' })

  // if items is {prop1:value1, prop2:value2}
  // then sort(['prop1', 'desc', 'prop2'])
  // will sort by prop1 desc and prop2
  for (let i = 0; i < properties.length; i++) {
    const property = properties[i]

    let order = -1
    if (i + 1 < properties.length) {
      const next = properties[i + 1]

      if (next === 'desc') {
        order = 1
        i++
      } else if (next === 'asc') {
        i++
      }
    }

    const compare = collator.compare(a[property], b[property])
    if (compare < 0) return order
    if (compare > 0) return -order

  }

  return 0
}

export { sortby }