class Chronic::Repeater

def self.scan_for_day_portions(token)
  scanner = {/^ams?$/ => :am,
             /^pms?$/ => :pm,
             /^mornings?$/ => :morning,
             /^afternoons?$/ => :afternoon,
             /^evenings?$/ => :evening,
             /^(night|nite)s?$/ => :night}
  scanner.keys.each do |scanner_item|
    return Chronic::RepeaterDayPortion.new(scanner[scanner_item]) if scanner_item =~ token.word
  end
  return nil
end