User profile page feed

frardouin - 

- Replied to a message or comment (display the user comment)

SELECT author.id FROM messages WHERE author.login = 'SusanH' and depth > 0 order by post_time DESC

In case you want get threads also, you will need to remove the depth

SELECT author.id FROM messages WHERE author.login = 'SusanH' order by post_time DESC

Documentation: 

https://community.lithium.com/t5/Developer-Documentation/bd-p/dev-doc-portal?section=commv2&collection=messages#constraints-depth

- Kudoed a message or comment (display the kudoed comment)

SELECT * FROM kudos WHERE user.id = '2'

With above query, you will get the message.id, to fetch the message details you need to make another call. 

Documentation: 
https://community.lithium.com/t5/Developer-Documentation/bd-p/dev-doc-portal?section=commv2&collection=kudos#constraints-user.id

 -Marked a comment as solution (display the solution comment) - 

Do you want to fetch answer marked by user or user posts which has been marked as accepted solution

Thank you very much TariqHussain 

For the "mark as solution" query I want the answer marked by the user, not the post.

Also, is it possible to re-order all activities by date without taking the type in consideration? (I dont want to have all the reply and then all the like, etc.)