It would be great if you could copy the following MOD and make your extension work and look exactly like it: https://www.phpbb.com/customise/db/mod/ ... od_swings/
And then perhaps you can add new features.
The "phpBB Mood Swings" MOD basically had:
- A page in ACP for configuring Moods similar to the one where you configure BBCodes.
- An entry in UCP->Profile where the user could choose his current mood from a dropdown list.
- Displayed the mood in the mini-profile at viewtopic.
- Optionally displayed moods at the memberlist.
Something that I especially liked was that when you were at your profile it displayed the mood's image next to the drop down list and when you chose a different mood from the list the image was updated as well.
Here's a set of mood images that might be useful to you: