threefunkymonkeys/chist

class ChistApp::IRCParser

  def self.parse(log)
    #scan for participants
    participants = log.scan(/<([^>]+)>/).uniq.collect! { |scan| scan.first }
    #map usernames
    classes = Hash.new
    participants.each_with_index { |username, key| classes[username] = "<span class=\"username_#{key}\">#{username}</span>"}
    #identify links
    log.gsub! /(https?:\/\/[^\s\n]*)/, '<a href="\1" target="_blank">\1</a>'
    #identify messages
    log.gsub! /(<[^>]+>)(.*)/, '\1<span class="message">\2</span>'
    #apply class to usernames
    classes.each do |k,v|
      log.gsub! /(<)#{Regexp.escape(k)}(>)/, '<span class="open-close">\1</span>' + v + '<span class="open-close">\2</span>'
    end
    #add outter div and identify channel info lines
    output = ""
    log.split(/\n\r?/).each do |line|
      output += "<div class=\"line\">" + line.gsub(/^(\*.+)$/, '<span class="channel-info">\1</span>') + "</div>\r\n"
    end

    output
  end
end