Rails plugin for embedding rich content by converting provided URL’s to appropriate HTML blocks for links, images, youtube, vimeo, google video, deezer and more.
auto_html plugin is the perfect choice if you don’t want to bother visitors with rich HTML editor or markup code, but you still want to allow them to embed video, images, links and more on your site, purely by pasting URL.
Let’s say you have model Comment with attribute body. Create another column in table Comments called body_html. Now have something like this:
class Comment < ActiveRecord::Base auto_html_for :body do html_escape image youtube :width => 400, :height => 250 link :target => "_blank", :rel => "nofollow" simple_format end end
… and you’ll have this behaviour:
Comment.create(:body => 'Hey check out this cool video: http://www.youtube.com/watch?v=WdsGihou8J4') => #<Comment id: 123, body: 'Hey check out this cool video: http://www.youtube.com/watch?v=WdsGihou8J4', body_html: '<p>Hey check out this cool video: <object height="250" width="400"><param name="movie" value="http://www.youtube.com/v/WdsGihou8J4" /><param name="wmode" value="transparent" /><embed src="http://www.youtube.com/v/WdsGihou8J4" type="application/x-shockwave-flash" height="250" wmode="transparent" width="400"></embed></object></p>'>
Note that order of invoking filters is important, ie. you want html_escape as first and link amongst last, so that it doesn’t transform youtube URL to plain link.
Now all you have to do is to display it in template without escaping, since plugin took care of that:
<% for comment in @comments %> <li><%= comment.body_html %></li> <% end %>
If you need to display preview, no problem. Have something like this as action in your controller:
def preview comment = Comment.new(params[:comment]) comment.auto_html_prepare render :text => comment.body_html end
Plugin is highly customizable, and you can easily create new filters that will transform user input any way you like. For instance, this is the image filter that comes bundled with plugin:
AutoHtml.add_filter(:image) do |text| text.gsub(/http:\/\/.+\.(jpg|jpeg|bmp|gif|png)(\?\S+)?/i) do |match| %|<img src="#{match}" alt=""/>| end end
For filter list and options they support check: github.com/dejan/auto_html/tree/master/lib/auto_html/filters
script/plugin install git://github.com/dejan/auto_html.git
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