node_modules/remark-stringify/lib/visitors/link-reference.js

'use strict'

var copy = require('../util/copy-identifier-encoding')
var label = require('../util/label')

module.exports = linkReference

var leftSquareBracket = '['
var rightSquareBracket = ']'

var shortcut = 'shortcut'
var collapsed = 'collapsed'

function linkReference(node) {
  var self = this
  var type = node.referenceType
  var exit = self.enterLinkReference(self, node)
  var value = self.all(node).join('')

  exit()

  if (type === shortcut || type === collapsed) {
    value = copy(value, node.label || node.identifier)
  }

  return leftSquareBracket + value + rightSquareBracket + label(node)
}