planet.rb

###
#  to run use
#     ruby ./planet.rb

require 'pluto/models'     ## see https://rubygems.org/gems/pluto-models


class Planet

  VERSION = '1.0.0'

  def self.banner
    "planet.rb/#{VERSION} on Ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}) [#{RUBY_PLATFORM}]"
  end

  
  def initialize
    puts self.class.banner     ##  print banner / say hello

    puts "db settings:"

    @db_config = {
      adapter: 'sqlite3',
      database: './planet.db'
    }

    pp @db_config
  end


  def run
    Pluto.connect( @db_config )

    Pluto::Model::Item.latest.limit(10).each_with_index do |item,i|
      puts "[#{i+1}] #{item.title}"
  
      generate_blog_post( item )
    end
  end

private
  def generate_blog_post( item )

    posts_root = "./_posts"

    FileUtils.mkdir_p( posts_root )  ## make sure path exists

    ## note:
    ##  jekyll pattern for blogs must follow
    ##    2020-12-21-  e.g. must include trailing dash (-)
    fn = "#{posts_root}/#{item.published.strftime('%Y-%m-%d')}-#{title_to_key(item.title)}.html"

    frontmatter = {
      'title'      => item.title,
      'created_at' => item.published,
      'author'     => item.feed.title,
      'layout'     => 'post'
    }

    frontmatter['original_link'] = item.url    unless item.url.empty?


    File.open( fn, 'w:utf-8' ) do |f|
      f.write frontmatter.to_yaml   # note: to_vaml starts yaml "document" with ---
      f.write "---\n\n"

      if item.content
        f.write item.content
      elsif item.summary
        f.write item.summary
      else
        ## warn: no content found for feed
      end
    end
  end

  def title_to_key( title )
    key = title.downcase
    key = key.gsub( /[^a-z0-9 -]/, '' )  ## for now remove all chars except a-z, 0-9, space and dash (-)
    key = key.strip
    key = key.gsub( /[ ]+/, '_' )
  
    ## note: might result in null string (use hash)
    key = "post#{Digest::MD5.hexdigest( title )}"   if key.empty?

    key
  end
  
end  ## class Planet



##############################
#  main entry - let's run

Planet.new.run      if __FILE__ == $0