Class: Id3Taginator::Frames::Text::LanguageFrame

Inherits:
Id3v2Frame
  • Object
show all
Includes:
HasId
Defined in:
lib/id3taginator/frames/text/tlan_language_frame.rb

Constant Summary

Constants inherited from Id3v2Frame

Id3v2Frame::HEADER_SIZE_V_2, Id3v2Frame::HEADER_SIZE_V_3_4

Constants included from Extensions::Encodable

Extensions::Encodable::ISO8859_1, Extensions::Encodable::UNICODE_ZERO, Extensions::Encodable::UTF_16, Extensions::Encodable::UTF_16BE, Extensions::Encodable::UTF_8, Extensions::Encodable::ZERO

Instance Attribute Summary collapse

Attributes inherited from Id3v2Frame

#frame_id, #options

Class Method Summary collapse

Instance Method Summary collapse

Methods included from HasId

#frame_info, included, #supported?

Methods inherited from Id3v2Frame

build_id3_flags, build_v2_frame, build_v3_frame, build_v4_frame, #compression?, #encryption?, #file_alter_preservation?, #frame_size, #group_identity?, #initialize, #re_calc_payload_size, #read_only?, #tag_alter_preservation?, #to_bytes

Methods included from Extensions::ArgumentCheck

#argument_between_num, #argument_boolean, #argument_exactly_chars, #argument_less_than_chars, #argument_more_than_chars, #argument_not_empty, #argument_not_nil, #argument_sym, included

Methods included from Extensions::Encodable

#decode, #decode_using_encoding_byte, #default_encoding_destination_byte, #encode, #encode_and_add_encoding_byte, #encode_string, #find_encoding, #find_encoding_byte, included, #merge, #pad_left, #pad_right, #read_stream_until, #remove_trailing_zeros, #zero_byte

Constructor Details

This class inherits a constructor from Id3Taginator::Frames::Id3v2Frame

Instance Attribute Details

#languages ⇒ Object

Returns the value of attribute languages.



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# File 'lib/id3taginator/frames/text/tlan_language_frame.rb', line 11

def languages
  @languages
end

Class Method Details

.build_frame(languages, options = nil, id3_version: 3) ⇒ Id3v2Frame

builds the language frame

Parameters:

  • languages (Array<String>, String) —

    the 3 character language(s)

  • options (Options::Options) (defaults to: nil) —

    options to use

  • id3_version (Integer) (defaults to: 3) —

    the id3 version to build the frame for

Returns:

Raises:

  • (ArgumentError) 


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# File 'lib/id3taginator/frames/text/tlan_language_frame.rb', line 20

def self.build_frame(languages, options = nil, id3_version: 3)
  supported?('TLAN', id3_version, options)

  argument_not_empty(languages, 'languages')

  langs = languages.is_a?(Array) ? languages : [languages]

  raise ArgumentError, 'Languages should be 3 characters, ISO-639-2.' if langs.any? { |l| l.length != 3 }

  frame = new(frame_id(id3_version, options), 0, build_id3_flags(id3_version), '')
  frame.languages = langs
  frame
end

Instance Method Details

#content_to_bytes ⇒ Object 



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# File 'lib/id3taginator/frames/text/tlan_language_frame.rb', line 39

def content_to_bytes
  @languages ||= ['und']
  content = @languages.join("\x00")
  content += "\x00" if @languages.length > 1
  encode_and_add_encoding_byte(content)
end

#process_content(content) ⇒ Object 



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# File 'lib/id3taginator/frames/text/tlan_language_frame.rb', line 34

def process_content(content)
  languages_str = decode_using_encoding_byte(content)
  @languages = languages_str.split("\x00").map(&:strip)
end