Class: Mutations::StringFilter

Inherits:
AdditionalFilter show all
Defined in:
lib/mutations/string_filter.rb

Instance Attribute Summary

Attributes inherited from InputFilter

#options

Instance Method Summary collapse

Methods inherited from AdditionalFilter

inherited

Methods inherited from InputFilter

#default, default_options, #discard_empty?, #discard_invalid?, #discard_nils?, #has_default?, #initialize

Constructor Details

This class inherits a constructor from Mutations::InputFilter

Instance Method Details

#filter(data) ⇒ Object 



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# File 'lib/mutations/string_filter.rb', line 17

def filter(data)
  # Handle nil case
  if data.nil?
    return [nil, nil] if options[:nils]
    return [nil, :nils]
  end

  # At this point, data is not nil. If it's not a string, convert it to a string for some standard classes
  data = data.to_s if !options[:strict] && [TrueClass, FalseClass, Integer, Float, BigDecimal, Symbol].any? { |klass| data.is_a?(klass) }

  # Now ensure it's a string:
  return [data, :string] unless data.is_a?(String)

  # At this point, data is a string. Now remove control characters from the string:
  data = data.gsub(/((?=[[:cntrl:]])[^\t\r\n])+/, ' ') unless options[:allow_control_characters]

  # Transform it using strip:
  data = data.strip if options[:strip]

  # Now check if it's blank:
  if data == ""
    if options[:empty_is_nil]
      return [nil, (:nils unless options[:nils])]
    elsif options[:empty]
      return [data, nil]
    else
      return [data, :empty]
    end
  end

  # Now check to see if it's the correct size:
  return [data, :min_length] if options[:min_length] && data.length < options[:min_length]
  return [data, :max_length] if options[:max_length] && data.length > options[:max_length]

  # Ensure it match
  return [data, :in] if options[:in] && !options[:in].include?(data)

  # Ensure it matches the regexp
  return [data, :matches] if options[:matches] && (options[:matches] !~ data)

  # We win, it's valid!
  [data, nil]
end