Filled Invisible Blocks Plugin/Barriers

Suggested name: Barriers+

What I want: I would like a plugin that is in a way like worldedit, but this invisible blocks, so say I were to do /barrier 4 sphere -h. The (-h) For hollow, The (4) For size, And the (sphere) For shape. I would like for there to be some basic shapes, like a Sphere or just a Box or a Wall or even a Pyramid. I would love also if you you /barrierreplace and use it was the worldedit replace command to be able to replace certain blocks in your radius into a barrier of invisible impassable blocks.

Ideas for commands: I would like it to be quite basic all commands start with /barrier and a few examples can be /barrier 4 box. (This would be a overall size of 4, basically just like //worldedit commands and then the shape which is a box.)

Ideas for permissions: Permissions can be as followed, barrier.box or barrier.sphere or barrier.pyramid and so and so on.

When I'd like it by: March, If earlier i would appreciate it, if it is possible maybe even on my birthday which is February 11th, that would be a sweet gift.