#!/usr/bin/env ruby

require "date"
require "fileutils"
require "json"
require "pathname"
require "nokogiri"

MICROBLOG_JSON_FILE = "_import/microblog/feed.json"

json = File.read(MICROBLOG_JSON_FILE)

data = JSON.parse(json)

data["items"].each do |item|
  images = []

  categories = ["microblog"]

  published_at = DateTime.parse(item["date_published"])

  body = item["content_text"]

  title = item["title"] || body.split(/(\n|\.)/).first

  parsed = Nokogiri::HTML.parse(body)
  parsed.css("img").each do |tag|
    images << tag[:src]
    photo_filename = tag[:src].split("/").last
    FileUtils.cp(
      "_import/microblog/#{tag[:src]}",
      "_pictures/blog/microblog/#{photo_filename}",
    )

    body = body.gsub(/<a.+img.+src="#{tag[:src]}".+\/a>/, <<~PICTURE)
      <figure class="photo">
        {% picture photo-square blog/microblog/#{photo_filename} alt="" %}
      </figure>
    PICTURE

    categories << "photos" unless categories.include?("photos")
  end

  categories << "blog" unless categories.include?("photos")

  contents = <<~MD
    ---
    title: #{title}
    date: #{published_at}
    layout: micropost
    categories: #{categories}
    #{images.first ? "image: \"blog/microblog/#{images.first&.split("/")&.last}\"\n" : ""}---

    #{body}
  MD

  if title.nil?
    slug = "untitled"
  else
    slug = title.downcase.gsub(/[^a-z0-9]+/, " ").strip.gsub(" ", "-")
  end

  post_filename = "_posts/#{published_at.strftime('%Y-%m-%d')}-#{slug}.md"

  File.open(post_filename, 'w') do |file|
    file.write(contents)
  end
end