A part of claytext.rb from artagnon/clayoven

claytext.rb

def process!(body)
  htmlescape_rules = {
    "&" => "&",
    "\"" => """,
    "'" => "'",
    "<" => "&lt;",
    ">" => "&gt;"
  }.freeze

  paragraph_types = [:plain, :emailquote, :codeblock, :header, :footer]
  paragraph_rules = {
    Proc.new { |line| line.start_with? "&gt; " } => lambda { |paragraph|
      paragraph.type = :emailquote },
    Proc.new { |line| line.start_with? "    " } => lambda { |paragraph|
      paragraph.type = :codeblock },
    Proc.new { |line| /^\[\d+\]: / =~ line } => lambda { |paragraph|
      paragraph.content.gsub!(%r{^(\[\d+\]:) (.*://(.*))}) {
        "#{$1} <a href=\"#{$2}\">#{$3[0, 64]}#{%{...} if $3.length > 67}</a>"
      }
      paragraph.type = :footer
    }
  }.freeze

  # First, htmlescape the body text
  body.gsub!(/[&"'<>]/, htmlescape_rules)

  # ... and it continues
end