Convert TWiki markup format to Confluence markup, for some kind of import thing.

Convert from TWiki to Confluence markup.rb

# I copied this from somewhere, I wish I knew where.

def convert_from_twiki_to_confluence(old_page_text)
  new_page_text = ""
  
  # shifting the tables over
  while (true)
    if (old_page_text.index(/\n\|/).nil?)
      new_page_text += old_page_text
      break
    end
        
    # table extraction
    table_index = old_page_text.index("\n|")
    first_chunk = old_page_text.slice!(0..table_index)
    table_chunk = ""
    old_page_text.each_line do |line|
      if line[0..0] == '|'
        table_chunk += line
      else
        break
      end
    end
    old_page_text.slice!(table_chunk)
    
    # table conversion
    # table_chunk.gsub!(/\|/, "||")
    # table_chunk.gsub!(/\|\|\s*$/, "\n|-")
    # table_chunk.gsub!(/^\|\|/, "|")
    # table_chunk.gsub!(/\|-\s*\Z/, "|}")
    # table_chunk.gsub!(/\A\|/, "{|class=\"wikitable sortable\"\n|")
    
    # process new table looking for headings
    new_table_chunk = ""
    table_chunk.each_line do |line|
      if line.match(/\*\s.*\s\*/)
        line.gsub!(/\|/, "||")
        # line.gsub!(/^\|/, "||")
        line.gsub!("*", '')
      end
      
      new_table_chunk += line
    end
    
    new_page_text += first_chunk + new_table_chunk
  end
  
  # bold
  # new_page_text.gsub!(/(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/, "\\1'''\\2'''\\3")
  # italic bold
  # new_page_text.gsub!(/(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/, "\\1''<b>\\2<\/b>''\\3") 
  # italic
  # new_page_text.gsub!(/(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/, "\\1''\\2''\\3")
  new_page_text.gsub!(/<\/?[Pp][Rr][Ee]>/, "{code}")
  new_page_text.gsub!(/<\/[Cc][Oo][Dd][Ee]>/, "}}")
  new_page_text.gsub!(/<[Cc][Oo][Dd][Ee]>/, "{{")
  
  new_page_text.gsub!(/<[Hh][Rr]\/?>/, "----")
  new_page_text.gsub!(/<[Bb][Rr]\/?>/, "")
  
  # monospaced bold
  new_page_text.gsub!(/(^|[\s\(])==([^ ].*?[^ ])==([\s\)\.\,\:\;\!\?]|$)/, "\\1*{{\\2}}*\\3")
  # monospaced
  new_page_text.gsub!(/(^|[\s\(])=([^ ].*?[^ ])=([\s\)\.\,\:\;\!\?]|$)/, "\\1{{\\2}}\\3")
  # H6
  new_page_text.gsub!(/(^|[\n\r])---\+\+\+\+\+\+([^\n\r]*)/, "\\1h6. \\2")
  # H5
  new_page_text.gsub!(/(^|[\n\r])---\+\+\+\+\+([^\n\r]*)/, "\\1h5. \\2")
  # H4
  new_page_text.gsub!(/(^|[\n\r])---\+\+\+\+([^\n\r]*)/, "\\1h4. \\2")
  # H3
  new_page_text.gsub!(/(^|[\n\r])---\+\+\+([^\n\r]*)/, "\\1h3. \\2")
  # H2
  new_page_text.gsub!(/(^|[\n\r])---\+\+([^\n\r]*)/, "\\1h2. \\2")
  # H1
  new_page_text.gsub!(/(^|[\n\r])---\+([^\n\r]*)/, "\\1h1. \\2")
  # external link
  new_page_text.gsub!(/\[\[(https?\:.*?)\]\[(.*?)\]\]/, "\[\\2|\\1\]")
  # internal link [[WikiWord][WikiWord]]
  new_page_text.gsub!(/\[\[([^\]]*)\]\]/, "\[\[\\1\|\\1\]\]")
  # internal lnk [[WikiWord][label]]
  new_page_text.gsub!(/\[\[([^\]]*)\]\[(.*?)\]\]/, "\[\[\\1\|\\2\]\]")
  # level 1 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{3}\* /, "\\1* ")
  # level 2 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{6}\* /, "\\1** ")
  # level 3 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{9}\* /, "\\1*** ")
  # level 4 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{12}\* /, "\\1**** ")
  # level 5 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{15}\* /, "\\1***** ")
  # level 6 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{18}\* /, "\\1****** ")
  # level 7 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{21}\* /, "\\1******* ")
  # level 8 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{24}\* /, "\\1******** ")
  # level 9 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{27}\* /, "\\1********* ")
  # level 10 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{30}\* /, "\\1********** ")
  # level 1 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{3}[0-9]\.? /, "\\1# ")
  # level 2 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{6}[0-9]\.? /, "\\1## ")
  # level 3 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{9}[0-9]\.? /, "\\1### ")
  # level 4 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{12}[0-9]\.? /, "\\1#### ")
  # level 5 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{15}[0-9]\.? /, "\\1##### ")
  # level 6 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{18}[0-9]\.? /, "\\1###### ")
  # level 7 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{21}[0-9]\.? /, "\\1####### ")
  # level 8 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{24}[0-9]\.? /, "\\1######## ")
  # level 9 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{27}[0-9]\.? /, "\\1######### ")
  # level 10 bullet
  new_page_text.gsub!(/(^|[\n\r])[ ]{30}[0-9]\.? /, "\\1########## ")
    
  
  new_page_text
end

puts convert_from_twiki_to_confluence(STDIN.read)