Like post function

Hello!
Today, i come here to show you guy a code that make users from your site can like post. Of course, they can unlike that post after they liked. When unliked, the button "Like" will appear again. In addition, the poster who received liked or unliked will received a "System Message" that alert the user who like post or unlike post and the link to post that liked or unliked (jumped to the post #). The list of the liker will apear on the bottom of the post and count total like received of user. This is an example. look picture.
I think this code must be added to the future JohnCMS version.

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Na[T]o, Кнопка мне нравится read and translate