inkdrop-import-utils/index.js

Helper methods for importing files to Inkdrop

const truncateToBinarySize = require('./truncate-to-binary-size')
const fs = require('fs')
const path = require('path')
const extractImages = require('./remark-extract-images')

/**
 * Extract title and body from the given path and data of the Markdown file
 *
 * @param {string} fn - The filename
 * @param {string} md - The Markdown content
 * @returns {title: string, body: string} Returns an object that has the title and body data
 */
function getTitleAndBodyFromMarkdown(fn, md) {
  const yaml = require('js-yaml')
  const lines = md.split('\n')
  let title = ''
  let yamlBlockStart = -1
  for (let i = 0; i < lines.length; ++i) {
    const line = lines[i]
    if (line === '---') {
      if (i === 0) {
        yamlBlockStart = i
      } else if (yamlBlockStart >= 0) {
        try {
          const frontmatter = yaml.safeLoad(
            lines.slice(yamlBlockStart + 1, i).join('\n')
          )
          title = frontmatter.title || frontmatter.subject || ''
        } catch (e) {
          // do nothing for invalid frontmatters
        }
        yamlBlockStart = -1
      }
      continue
    }
    if (yamlBlockStart < 0 && line.match(/^#+\s/)) {
      title = truncateToBinarySize(line.replace(/^#+\s*/, ''), 128)
      lines.splice(i, 1)
      break
    }
  }
  if (!title) title = path.basename(fn, path.extname(fn))
  return { title: title, body: lines.join('\n') }
}

/**
 * Get meta information from file
 *
 * @param {string} fn - The filename
 * @returns {tags: [], createdAt: number, updatedAt: number} Returns an object with `tags`, `createdAt` and `updatedAt`
 */
function getMetaFromMarkdown(fn) {
  const stats = fs.statSync(fn)
  const meta = {
    tags: [],
    createdAt: stats.mtimeMs,
    updatedAt: stats.birthtimeMs
  }
  return meta
}

module.exports = {
  getTitleAndBodyFromMarkdown,
  getMetaFromMarkdown,
  extractImages
}