markdown_to_yaml.rb

def prepare_files
  unless File.exists?('original') && File.file?('original') && File.readable?('original')
    abort('There is not `original` file in current directory.')
  end
  File.delete('yaml') if File.exists?('yaml')
  [File.open('original'), File.new('yaml', 'w+')]
end

def translate_to_yml(original, yaml)
  original.each_line do |line|
    next if line == ("\n")
    translate_line(yaml, line)
  end
end

def translate_line(yaml, line)
  if /##/ =~ line
    yaml.puts(line.gsub(' ', '_').gsub('##_', '  ').gsub(/\n/, "").downcase + ':')
  elsif /#/ =~ line
    yaml.puts(line.gsub(' ', '_').gsub('#_', '').gsub(/\n/, "").downcase + ':')
  elsif /  \* \[/ =~ line
    translate_link(yaml, line, '  ')
  elsif /\* \[/ =~ line
    translate_link(yaml, line, '')
  elsif /\*/ =~ line
    yaml.puts(line.gsub(' ', '_').gsub('*_', '    ').gsub(/:\n/, ":").gsub(/\n/, "").downcase)
  else
    puts("#{line} cant`t be identified.")
  end
end

def translate_link(yaml, line, tab)
  name_beginning, name_ending = [line =~ /\[/, line =~ /\]/]
  yaml.puts("#{tab}    - name: " + line.slice(name_beginning + 1...name_ending))
  link_beginning, link_ending = [line =~ /\(/, line =~ /\)/]
  yaml.puts("#{tab}      link: " + line.slice(link_beginning + 1...link_ending))
  description_beginning, description_ending = [line =~ /- /, line =~ /\n/]
  yaml.puts("#{tab}      description: " + line.slice(description_beginning + 1...description_ending))
end

begin
  original, yaml = prepare_files
  translate_to_yml(original, yaml)
  yaml.close
  original.close
end