Hello

 Can anyone suggest me how to do the below things on site:

(i) On login page, Facebook login facility will be there. Existence of customer in our system will be checked when he login from existing Facebook account. In case the person logs in the first time, we will get the user details from Facebook API and will generate same customer record in our application. Next time that customer login using his Facebook account, simply that customer will be authenticated and will allow to follow the process as our site user does.

(ii) if a customer purchases products through our site, purchased products would be published on his Facebook wall.

(iii) When user logs in first time, using his/her Facebook account at our website, after automatic registering that customer in our application one message would be published on his/her facebook wall like ABC has registered with xyz.com.

(iv) Share This Button would be added in product detail page against each product.

Thanks