emojimoji.rb

require "named_emoji"

Earthquake.once do
  ::EMOJIMOJI = NamedEmoji::ALL.each_with_object(Hash.new{|h, k| h[k] = {}}) do |(key, value), hash|
    hash[value.size].update(value => ":#{key}:") if value
  end
  ::EMOJI_RE = ::EMOJIMOJI.inject({}) do |regexps, (size, hash)|
    re = case size
         when 1
           Regexp.new("[" + hash.keys.join + "]")
         else
           Regexp.union(hash.keys)
         end
    regexps.update(size => re)
  end
end

Earthquake.init do
  command :emojimoji do |m|
    text = twitter.status(m[1])["text"].u
    ::EMOJIMOJI.keys.sort.reverse_each do |size|
      text.gsub!(::EMOJI_RE[size], ::EMOJIMOJI[size])
    end
    puts text
  end
end