Module: GSMTexting

Extended by:
GSMTexting
Includes:
CharacterConstants, ConversionTable
Included in:
GSMTexting
Defined in:
lib/gsm_texting.rb

Constant Summary collapse

DEFAULT_REPLACE_CHAR = 
"?".freeze
BASIC_CHARACTER_SET = 
[
  '@', 'Δ',  SP, '0', '¡', 'P', '¿', 'p',
  '£', '_', '!', '1', 'A', 'Q', 'a', 'q',
  '$', 'Φ',  DQ, '2', 'B', 'R', 'b', 'r',
  '¥', 'Γ', '#', '3', 'C', 'S', 'c', 's',
  'è', 'Λ', '¤', '4', 'D', 'T', 'd', 't',
  'é', 'Ω', '%', '5', 'E', 'U', 'e', 'u',
  'ù', 'Π', '&', '6', 'F', 'V', 'f', 'v',
  'ì', 'Ψ',  SQ, '7', 'G', 'W', 'g', 'w',
  'ò', 'Σ', '(', '8', 'H', 'X', 'h', 'x',
  'Ç', 'Θ', ')', '9', 'I', 'Y', 'i', 'y',
   LF, 'Ξ', '*', ':', 'J', 'Z', 'j', 'z',
  'Ø', ESC, '+', ';', 'K', 'Ä', 'k', 'ä',
  'ø', 'Æ', ',', '<', 'L', 'Ö', 'l', 'ö',
   CR, 'æ', '-', '=', 'M', 'Ñ', 'm', 'ñ',
  'Å', 'ß', '.', '>', 'N', 'Ü', 'n', 'ü',
  'å', 'É', '/', '?', 'O', '§', 'o', 'à'
].freeze
BASIC_CHARACTER_SET_EXTENSION = 
[
  FF, BS, '|', '^', '€', '{', '}', '[', '~', ']'
].freeze
CHARACTER_SET_REGEX = 
Regexp.escape(BASIC_CHARACTER_SET.join)
CHARACTER_EXTENSION_REGEX = 
Regexp.escape(BASIC_CHARACTER_SET_EXTENSION.compact.join)
GSM_REGEX = 
/\A[#{CHARACTER_SET_REGEX}#{CHARACTER_EXTENSION_REGEX}]*\z/.freeze

Constants included from ConversionTable

ConversionTable::CONVERSION_TABLE

Constants included from CharacterConstants

CharacterConstants::BS, CharacterConstants::CR, CharacterConstants::DQ, CharacterConstants::ESC, CharacterConstants::FF, CharacterConstants::LF, CharacterConstants::SP, CharacterConstants::SQ

Instance Method Summary collapse

Instance Method Details

#can_encode?(str) ⇒ Boolean

Verifies if string can be encoded in GSM-7 without loosing information

Returns:

  • (Boolean) 


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# File 'lib/gsm_texting.rb', line 40

def can_encode?(str)
  str.nil? || !(GSM_REGEX =~ str).nil?
end

#encode(str, replace_char: nil) ⇒ Object

Convert unicode chars to GSM-7 compatible equivalents if possible



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# File 'lib/gsm_texting.rb', line 45

def encode(str, replace_char: nil)
  return if str.nil?

  unless replace_char && can_encode?(replace_char)
    replace_char = DEFAULT_REPLACE_CHAR
  end

  str.unpack("U*").map { |char|
    gsm_compatible_char = CONVERSION_TABLE[char]
    utf8_char = char.chr(Encoding::UTF_8)
    gsm_char = can_encode?(utf8_char) ? utf8_char : replace_char

    gsm_compatible_char || gsm_char
  }.join
end