Convert Inkdrop backup file to TextBundle for importing to Bear

inkdrop2textbundle

#!/usr/bin/env ruby
# Convert Inkdrop backup files (.json) to TextBundle v2 (.textbundle).for importing to Bear
# Usage: inkdrop2textbundle note:*.json

require "json"
require "tmpdir"
require "fileutils"
require "base64"

def inkdrop_to_textbundle(src)
  src = File.expand_path(src)
  src_dir = File.dirname(src)

  # read note
  inkdrop = JSON.parse(File.read(src))
  raise "Unknown doctype: #{inkdrop["doctype"].inspect}" unless inkdrop["doctype"] == "markdown"
  text = inkdrop["body"]

  Dir.mktmpdir do |tmpdir|
    # create $(tmpdir)/foo.textbundle
    textbundle = File.join(tmpdir, File.basename(src).gsub(/\.json$/, ".textbundle"))
    Dir.mkdir(textbundle)
    Dir.chdir(textbundle) do
      Dir.mkdir("assets")

      # copy asset, replace path
      text.gsub!(%r{\(inkdrop://(file:.+?)\)}){
        id = $1
        file = JSON.parse(File.read("#{src_dir}/#{id}.json"))

        extension = case file["contentType"]
        when "image/jpeg"
          ".jpeg"
        when "image/png"
          ".png"
        else
          raise "Unknown image type: #{mime.inspect}"
        end

        data = Base64.decode64(file["_attachments"]["index"]["data"])

        file_name = "assets/#{id}#{extension}"

        File.write(file_name, data)
        "(#{file_name})"
      }

      tags = inkdrop["tags"].map{|id|
        tag = JSON.parse(File.read("#{src_dir}/#{id}.json"))
        tag["name"]
      }
      tag_line = tags.empty? ? nil : (tags.map{|t| "##{t}" }.join(" ") + "\n")

      text =  [
        "# " + inkdrop["title"] + "\n",
        tag_line,
        text,
      ].compact.join("\n")

      File.write("text.markdown", text)
      File.write("info.json", {
        "transient" => true,
        "type" => "net.daringfireball.markdown",
        "creatorIdentifier" => "net.shinyfrog.bear",
        "version" => 2,
      }.to_json)
    end

    dest = "#{src_dir}/#{File.basename(textbundle)}"
    FileUtils.cp_r(textbundle, dest)
    FileUtils.touch(dest, mtime: Time.at(inkdrop["updatedAt"] / 1000.0).utc)
  end
end

ARGV.each{|f| inkdrop_to_textbundle(f) }