module Medivo
  class ArrayValidator < ActiveModel::Validator
    def validate(record)
      for field in options[:fields]
        value = record.attributes[field]
        record.errors.add(field, "#{field} must be an array") unless value.is_a? Array
      end
    end
  end

  class DateValidator < ActiveModel::Validator
    def validate(record)
      for field in options[:fields]
        value = record.attributes[field]
        date = Date.strptime(value, '%Y%m%d') rescue nil
        record.errors.add(field, "invalid #{field}. needs to be in '%Y%m%d' format") unless date
      end
    end
  end
end