Ok, let me explain in detail what I am trying to do...
We are using Subversion as the code repository. What I observed in the large projects, having more than 15 programmers/developers working, that there are a lot of file merge issues. In ideal scenario, one should lock file and work, but that doesn't happen everytime, especially given the tight deadlines to deliver.
I thought of creating a web app, which could bring in the entire Subversion repository, and then users could enter comments at file and folder level to flag that node. The system would not enforce anything, but just show updates for each node. A user can flag a file or folder as locked, but it would be a notional and not a real flag. This is to be integrated in the developer's network. I have the SVN API in place.
The app is to be extended for user machines too, hence needs to be generic. This is more for learning and internal usage, but timelines given to me are like an actual project.