A 1Writer action for adding Jekyll frontmatter to a Markdown document.

1writer-format_for_jekyll.js

// Main Steps

let text = editor.getText()

text = addFrontMatter(text)
text = removeTitle(text)

editor.setText(text)

moveCursor(text)

// Function Definitions

function addFrontMatter(text) {
  const frontMatter = 
`---
title: ${getTitle(text)}
layout: ${getLayout()}
date: ${getDateTime()}
excerpt: ${getExcerpt()}
category: ${getCategory()}
tags: ${getTags()}
---`
  return frontMatter + text
}

function getTitle(text) {
  const title_re = /# ([^\n]+)/
  const title_match = text.match(title_re)
  const title = (title_match === null) ? '' : title_match[1]
  return `${title}`
}

function getLayout() {
  return `post`
}

function getDateTime() {
  const now = new Date()
  const date = now.toJSON().slice(0,10)
  const time = now.getHours().toString().padStart(2, '0') + ":" + now.getMinutes().toString().padStart(2, '0') + ":" + now.getSeconds().toString().padStart(2, '0')
  const offset = now.getTimezoneOffset() / 60 * -100
  const tz = ((offset < 0) ? '-' : '+') + offset.toString().padStart(4, '0')
  return `${date} ${time} ${tz}`
}

function getExcerpt() {
  return ``
}

function getCategory() {
  return ``
}

function getTags() {
  return ``
}

function removeTitle(text) {
  const title_re = /# [^\n]+/
  const title = text.match(title_re)
  return text.substring(0, title.index) + text.substring(title.index + title[0].length)  
}

function moveCursor(text) {
  const excerpt_re = /excerpt:.*/
  const excerpt = text.match(excerpt_re)
  editor.setSelectedRange(excerpt.index + excerpt[0].length)
}