Post on someones FB wall after populating textarea

Hi guys,

I am looking for a plugin that can do the following:

I need the user thats on the website to go trough multi step contact form. In one of the steps the user can make a statement (write few lines) into textfield and there should be option to check if she/he wants to share that on facebook / G+. I guess here a facebook app will prompt and ask for the details. After checking the the box and pressing next button the user will finish the form and the text will be shared on his/hers wall.

Do you know some plugin that can do this feature?

Thanks