Subscriptions module

[xeckit]

I'm interested in buying a vBulletin license to be used by an academic community.

One of our main needs is a subscriptions module so that users can sign up for events like group dinners, parties, etc.

It's something like a poll or attachment that can be added to any topic. An admin or a mod adds a subscription list to a topic, and every user can sign up in the list, and add any number of escorts. The users can also sign off and remove escorts. An user can sign up, add or remove escorts, and sign off as many times as they wish during the time period defined by the admins. After that the list is locked and no more changes can be made.

We currently have a custom made forum with this functionallity, but we want to switch to vBulletin, so we need to know if there is any mod like this already or if it's possible to implement such this easily.

An example screenshot of a subscriptions list to a group dinner, which is attached to a forum topic on our current forum, can be viewed here:


Something like this needs new tables in the database and some template and core vB code changes.

I'm an experienced PHP developer and I'm willing to implement this myself if there's no similar mod already, but I want to know if hacking the vB code to implement this kind of functionallity won't bring problems on future upgrades, or if there's a "clean" way to do it that won't interfere with them and allows us to keep the board always at the last version.

Best Regards,
Tiago Nunes