class Chronic::Repeater

def self.scan_for_day_names(token)
  scanner = {/^m[ou]n(day)?$/ => :monday,
             /^t(ue|eu|oo|u|)s(day)?$/ => :tuesday,
             /^tue$/ => :tuesday,
             /^we(dnes|nds|nns)day$/ => :wednesday,
             /^wed$/ => :wednesday,
             /^th(urs|ers)day$/ => :thursday,
             /^thu$/ => :thursday,
             /^fr[iy](day)?$/ => :friday,
             /^sat(t?[ue]rday)?$/ => :saturday,
             /^su[nm](day)?$/ => :sunday}
  scanner.keys.each do |scanner_item|
    return Chronic::RepeaterDayName.new(scanner[scanner_item]) if scanner_item =~ token.word
  end
  return nil
end