const pixie = require('pixie')

function pixieModel (template, model) {
  const result = []
  if (template[0].length > template[1].length) {
    result[0] = { key: '', value: template[0][0] }
    for (let i = template[1].length; i--;) {
      let e = i + 1
      result[e] = { key: model[template[1][i]], value: template[0][e] }
    }
  } else {
    for (let i = template[1].length; i--;) {
      result[i] = { key: model[template[1][i]], value: template[0][i] }
    }
  }
  return result
}

const input = '{1}One{2}Two{2}Three{3}Four{1}'
const model = { 1: 'circle', 2: 'check', 3: 'bonus' }
const template = pixie.parse(input, '{', '}')

console.log(
  pixieModel(template, model)
)