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 TestTypesValidator < ActiveModel::Validator
    def validate(record)
      for field in options[:fields]
        value = record.attributes[field]
        valid = value.is_a?(String) and value.split(",").is_a?(Array) rescue false
        record.errors.add(field, "#{field} must be a comma delimited string of one of more test id's' like so: \"test_type1\" or \"test_type1, test_type2\" ") unless valid
      end
    end
  end

  # A valid date for the orders is a little different that usual .. so take note '%Y%m%d'
  # has no slashes or dashes .. so a date is valid that looks like:  '20111202'
  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