Module: Arkaan::Concerns::MimeTypable::ClassMethods

Defined in:
lib/arkaan/concerns/mime_typable.rb

Overview

Submodule holding all the static methods add to the current subclass.

Author:

Instance Method Summary collapse

Instance Method Details

#mime_type(values) ⇒ Object

Defines the MIME type attribute with the given possible MIME types.

Parameters:

  • values (Array<String>) —

    the possible MIME types, * can be used as wild cards.



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# File 'lib/arkaan/concerns/mime_typable.rb', line 15

def mime_type(values)
  # @!attribute [rw] mime_type
  #   @return [String] the MIME type of the file, obtained from the uploaded file.
  field :mime_type, type: String

  validates :mime_type, presence: { message: 'required' }

  validate :mime_type_validity, if: :mime_type?

  mime_type_check(values)
end

#mime_type_check(values) ⇒ Object 



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# File 'lib/arkaan/concerns/mime_typable.rb', line 27

def mime_type_check(values)
  # Validates the validity of the MIME type by checking if it respects any of the given mime types.
  # If it does not respect any MIME types possible, it adds an error to the mime_type field and invalidates.
  define_method :mime_type_validity do
    checked_types = parse_values(values)
    return true if checked_types.empty?

    checked_types.each do |type|
      type_regex = ::Regexp.new("^#{type.sub(/\*/, '(.+)')}$")
      return true unless type_regex.match(mime_type).nil?
    end
    errors.add(:mime_type, 'pattern')
  end
end

#parse_values(values) ⇒ Object 



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# File 'lib/arkaan/concerns/mime_typable.rb', line 42

def parse_values(values)
  values.is_a?(Symbol) ? send(values) : values
rescue StandardError
  []
end