class Coupdoeil::Hovercard::Option::Placement

def parse(value)
  values = value.to_s.split(",")
  4.times.sum do |index|
    next 0 unless (placement = values[index])
    placement.strip!
    placement_index = INDEX_BY_VALUES[placement]
    placement_index << (index * 4)
  end
end

def validate!
  values = value.to_s.split(",")
  values.each do |placement_value|
    next if placement_value.strip.in?(VALUES)
    values_sentence = VALUES.to_sentence(last_word_connector: " or ")
    raise_invalid_option "Value must be one of: #{values_sentence}"
  end
end