module TrustyCms::Taggable::Util

def self.strip_leading_whitespace(text)
  text = text.dup
  text.gsub!("\t", '  ')
  lines = text.split("\n")
  leading = lines.map do |line|
    unless line =~ /^\s*$/
      line.match(/^(\s*)/)[0].length
    end
  end.compact.min
  lines.inject([]) { |ary, line| ary << line.sub(/^[ ]{#{leading}}/, '') }.join("\n")
end

def self.tags_in_array(array)
  array.grep(/^tag:/).map { |name| name[4..-1] }.sort
end