module Emoju

# File lib/emoju.rb, line 19
def docomo_to_unicode(str)
  convert_from(str, :docomo)
end

# File lib/emoju.rb, line 23
def google_to_unicode(str)
  convert_from(str, :google)
end

# File lib/emoju.rb, line 15
def softbank_to_unicode(str)
  convert_from(str, :softbank)
end

# File lib/emoju.rb, line 9
def unify(str)
  result = softbank_to_unicode(str)
  result = google_to_unicode(result)
  docomo_to_unicode(result)
end

# File lib/emoju.rb, line 48
def codpoint_to_str(codepoint)
  codepoint.split("-").map { |c| [c.hex].pack("U") }.join
end

# File lib/emoju.rb, line 33
def convert_from(str, encoding)
  if SUPPORTED_ENCODINGS.include?(encoding)
    regexp = emoji_data.regexp_for(encoding)
    codepoint_map = emoji_data.public_send("emoji_#{encoding}_map".to_sym)

    str.gsub(regexp) do |capture|
      codepoint = capture.codepoints.map { |i| i.to_s(16).rjust(4,'0')}.join('-').upcase
      unified_codepoint = codepoint_map[codepoint]
      codpoint_to_str(unified_codepoint)
    end
  else
    fail "unsupported encoding"
  end
end

# File lib/emoju.rb, line 29
def emoji_data
  @emoji_data ||= Data.new()
end