post notification on user wall when they make comment/post in wordpress

Project Description:
we have a site build in wordpress

currently users can login via wordpress or facebook login

they need to be loggedin to post a comment or post a new dj review or event

In addition I need all posts to trigger a notification on the posters facebook accounts

e.g. if a user (e.g. john smith) submits a review a notification will be posted on their facebook timeline saying “John Smith has just posted a review on Reviews - ”



if a user submits a comment a notification will be posted on their facebook timeline saying “John Smith has just posted a comment - ”



if a user submits an event a notification will be posted on their facebook timeline saying “John Smith has just posted an event - ”

please give me your relevant facebook experience ideally having achieved the same thing already.

thanks