sync.rb

require 'algoliasearch'
require 'redcarpet'
require 'redcarpet'

module Middleman
  # utility class for syncing articles with algolia
  class AlgoliaSync < ::Middleman::Extension
    def initialize(app, options_hash = {}, &block)
      env_vars = YAML.safe_load(File.open('secrets.yml').read)
      Algolia.init application_id: env_vars['application_id'],
                   api_key: env_vars['api_key']
      @algolia_index = Algolia::Index.new('posts')
      @redcarpet = Redcarpet::Markdown.new(Redcarpet::Render::HTML)
      super
    end

    def after_build(builder)
      Dir.glob('source/articles/*/*.markdown') do |markdown_file|
        markdown_post = File.open(markdown_file).read
        article_meta_data = YAML.safe_load(markdown_post.lines[1..3].join("\n"))
        title = article_meta_data['title']
        sanatized_title = title.downcase.tr(' ', '-').tr('/', '-')
        article_link = "/#{sanatized_title}.html"
        tags = article_meta_data['tags'].split(',')
        date = article_meta_data['date']
        unix_time = Date.parse(date).to_time.to_i
        markdown_body = markdown_post.lines[5..-1].join("\n")
        body_html = @redcarpet.render(markdown_body).tr("\n\n", ' ')
        text = Nokogiri::HTML(body_html).text.squeeze(' ')
        post =
          { objectID: Base64.encode64(title),
            title: title, article_link: article_link,
            tags: tags, text: text, date: unix_time }
        begin
          @algolia_index.save_object(post)
        rescue => e
          puts "error: #{e}"
        end
      end
    end
  end
end

::Middleman::Extensions.register(:sync, ::Middleman::AlgoliaSync)