module AutomagicalValidations

# File lib/automagical_validations.rb, line 2
def automagically_validate(*types_to_validate)
  return unless self.table_exists?

  validation_settings = {}

  if types_to_validate.first.is_a? Hash
    validation_settings = types_to_validate.first
    validation_settings.symbolize_keys!
  else
    types_to_validate.each do |type|
      validation_settings[type.to_sym] = {}
    end
  end

  columns.each do |column|
    # Do not touch the columns not specified
    next unless validation_settings[column.type]

    # Do not define validator on columns that have no limit information, even if asked to
    next unless column.limit

    # Do not define additional length validators if any are already in place
    next if validators_on(column.name).any? do |validator|
      validator.is_a?(ActiveModel::Validations::LengthValidator) && validator.options[:maximum]
    end

    validates_length_of column.name, validation_settings[column.type].merge({:maximum => column.limit})
  end
end