This gem provides a HTML renderer for redcarpet.

How to use

gem "redcarpet-socialable", github: "releu/redcapret-socialable"

# override the following methods for your case
class MyAwesomeRenderer < Redcarpet::Socialable
  def highlight_tag?(name)
    Tag.where(name: name.downcase).first_or_create!
  end

  def highlight_username?(name)
    User.where(username: name).exists?
  end

  def tag_template(name)
    %(<a>##{name}</a>)
  end

  def mention_template(name)
    %(<a>@#{name}</a>)
  end
end

# use redcarpet's options https://github.com/vmg/redcarpet
renderer = MyAwesomeRenderer.new
# space_after_headers must be true for hashtag feature
markdown = Redcarpet::Markdown.new(renderer, space_after_headers: true)

markdown.render "#foo\n@bar" # => <p><a>#foo</a><br><a>@bar</a></p>

Mixins

There are two modules you can use as mixins to extend an existing renderer with features from Redcarpet::Socialable: Mentions and Hashtags.

These mixins will hook into renderer #postprocessing method in order to process mentions or hashtags.

Here's a basic example for mentions:

class MentionsRenderer < Redcarpet::Render::HTML
  include Redcarpet::Socialable::Mentions
end

Redcarpet::Socialable::Mentions mentions you can overwrite include:

• #mention_template
• #mention? - works as #highlight_username? from Redcarpet::Socialable
• #mention_regexp - Use it to change the regexp to match a mention

And a basic example for hashtags:

class HashtagsRenderer < Redcarpet::Render::HTML
  include Redcarpet::Socialable::Hashtags
end

Redcarpet::Socialable::Hashtags mentions you can overwrite include:

• #hashtag_template - works as #tag_template from Redcarpet::Socialable
• #hashtag? - works as #highlight_tag? from Redcarpet::Socialable
• #hashtag_regexp - Use it to change the regexp to match a hashtag