A grand unified emoji mapper for some emoji providers.
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somemoji.gemspec

README.md

Somemoji

Gem Version CircleCI Documentation

A grand unified emoji mapper for some emoji providers.

Supported emoji

Provider Count License
Apple Emoji 1220 emojis Licensed by Apple Inc.
EmojiOne 1794 emojis Licensed by EmojiOne Inc.
Noto Emoji 1428 emojis SIL Open Font License 1.1
Twemoji 1513 emojis CC-BY 4.0

Installation

Add this line to your application's Gemfile:

gem "somemoji"

And then execute:

bundle

Or install it yourself as:

gem install somemoji

Command line tool

somemoji executable is bundled to extract images from each emoji provider.

Note that --provider=apple requires macOS Sierra or later.

$ somemoji --help
Usage: somemoji extract [options]
    -p, --provider     (required) apple, emoji_one, noto, or twemoji
    -d, --destination  (required) directory path to locate extracted image files
    -f, --format       png or svg (default: png)
    -s, --size         Some providers have different size image files
    -h, --help         Display this help message

e.g. To extract emojis from Twemoji into ./images/emoji directory, execute:

somemoji extract --provider=twemoji --destination=./images/emoji

Use cases

Replace emoji codes

Somemoji.emoji_one_emoji_collection.replace_code("I :heart: Emoji") do |emoji|
  %(<img alt="#{emoji.character}" class="emoji" src="/images/emoji/#{emoji.base_path}.png">)
end
#=> 'I <img alt="❤" class="emoji" src="/images/emoji/unicode/2764.png"> Emoji'

Replace emoji characters

Somemoji.noto_emoji_collection.replace_character("I 💗 Emoji") do |emoji|
  %(<img alt="#{emoji.character}" class="emoji" src="/images/emoji/#{emoji.base_path}.png">)
end
#=> 'I <img alt="💗" class="emoji" src="/images/emoji/unicode/1f497.png"> Emoji'

Custom emojis

custom_emoji_collection = Somemoji.emoji_one_emoji_collection + Somemoji::EmojiCollection.new(
  [
    Somemoji::Emoji.new(code: "foo"),
    Somemoji::Emoji.new(code: "bar"),
  ]
)
custom_emoji_collection.find_by_code("foo").class #=> Somemoji::Emoji
custom_emoji_collection.find_by_code("bar").class #=> Somemoji::Emoji
custom_emoji_collection.find_by_code("100").class #=> Somemoji::Emoji
custom_emoji_collection.replace_code("I :bar: Emoji") do |emoji|
  %(<img alt="#{emoji.character || emoji.code}" class="emoji" src="/images/emoji/#{emoji.base_path}.png">)
end #=> 'I <img alt="bar" class="emoji" src="/images/emoji/bar.png"> Emoji'

HTML::Pipeline integration

class EmojiFilter < ::HTML::Pipeline::Filter
  IGNORED_ANCESTOR_ELEMENT_NAMES = %w(
    code
    pre
    tt
  )

  # @note Implementation for HTML::Pipeline::Filter
  def call
    doc.search(".//text()").each do |node|
      unless has_ancestor?(node, IGNORED_ANCESTOR_ELEMENT_NAMES)
        node.replace(
          ::Somemoji.twemoji_emoji_collection.replace_code(node.to_html) do |emoji|
            %W(
              <img
                alt="#{emoji.code}"
                class="emoji"
                height="20"
                src="/images/emoji/#{emoji.base_path}.png"
                title=":#{emoji.code}:"
                width="20">
            ).join(" ")
          end
        )
      end
    end
    doc
  end
end

Documentation

See API documentation at http://www.rubydoc.info/github/r7kamura/somemoji.