A 1Writer action for adding a reference link to a Markdown document.

1writer-add_reference_link.js

// Main Steps

let text = editor.getText()

const range = editor.getSelectedRange()
const selection = editor.getSelectedText()

process(text, range, selection)

// Function Definitions

async function process(text, range, selection) {
  const reference = await input_reference()
  const url = await input_url()

  text = insertReference(text, range[0], range[1], selection, reference)
  text = insertDefinition(text, range[0], reference, url)

  editor.setText(text)
  moveCursor(text, reference)
}

function input_reference() {
  return new Promise(resolve => {
    ui.input('Link Reference', '', 'Enter the link reference', resolve)
  })
}

function input_url() {
  return new Promise(resolve => {
    ui.input('Link URL', '', 'Enter the link URL', 'url', resolve)
  })
}

function insertReference(text, start, end, selection, reference) {
  const label = `[${selection}][${reference}]`
  return text.slice(0, start) + label + text.slice(end)
}

function insertDefinition(text, start, reference, url) {
  const paragraph_end = text.indexOf('\n\n', start)
  const pos = (paragraph_end === -1) ? text.length : paragraph_end
  const definition = `\n\n[${reference}]: ${url}`
  return text.slice(0, pos) + definition + text.slice(pos)
}

function moveCursor(text, reference) {
  const pattern = `\]\[${reference}\]`
  const label = text.match(new RegExp(pattern))
  const pos = label.index + reference.length + 3
  editor.setSelectedRange(pos)
}