module RailsEmoji

# File lib/rails_emoji.rb, line 11
def self.host
  @host
end

# File lib/rails_emoji.rb, line 7
def self.host=(host)
  @host = host
end

# File lib/rails_emoji/render.rb, line 4
def render(*args)
  options = args.extract_options!.stringify_keys
  host = options['host'] || RailsEmoji.host
  return if args[0].blank?

  if options.key? 'size'
    if options['size'] =~ %r{\A\d+x\d+\z}
      options['width'], options['height'] = options['size'].split('x')
    else
      options['width'] = options['height'] = options['size']
    end
  end

  options.slice! 'class', 'width', 'height', 'title', 'alt'
  options.reverse_merge! 'class' => 'emoji', 'width' => 20, 'height' => 20

  # replace emoji code to image tag
  args[0].gsub(/:([a-z0-9_+-]+):/) do |emoji|
    attrs = options.reverse_merge(
      'src' => "#{host}/assets/emojis/#{emoji[1..-2]}.png",
      'alt' => emoji,
      'title' => emoji
    ).select{ |k, v| !v.blank? }.collect{ |k, v| %(#{k}="#{v}") }

    (RailsEmoji::EMOJI.include? emoji[1..-2]) ? "<img #{attrs * ' '} />" : emoji
  end
end