decimal-numbering/index.js

number hierarchical document parts like "Section 1.5.3"

var alpha = require('lower-alpha')

module.exports = function decimal (numbering, shortForm) {
  return (
    (shortForm ? '' : 'Section\u00a0') +
    numbering
      .map(function (component) {
        var element = component.element
        var series = component.series
        return series.of > 1
          ? (alpha(series.number) + '-' + element.number)
          : element.number
      })
      .join('.')
      .toUpperCase() +
    (shortForm ? '.' : '')
  )
}