How to toggle a split window in Vim

I have the TaskWarrior Plugin installed. In order to show the tasks, you have to enter the :TW command. The problem is, TaskWarrior is displayed in the same buffer that I'm using for editing. In order to avoid that, I have to create a new Split window, switch to the split window and then enter :TW.

I want to have a command that does that in a "switch/toggle" style. The command will not create a new split window if a split window already exists. For example, I have the command to nt keystrokes and it creates/removes the split window each time.

Any suggestions on where to start and how difficult of a task that is?

Solution

I have adapted some online code and it is doing the job pretty well for now. This will toggle a TaskWarrior split tab when the combination nt is pressed.

" Toggle TaskWarrior
nnoremap nt :call ToggleTaskWarriorMode()<CR>
vnoremap nt :call ToggleTaskWarriorMode()<CR>gv

let g:TaskWarriorMode = 0

function! ToggleTaskWarriorMode()
    let g:TaskWarriorMode = 1 - g:TaskWarriorMode
    if (g:TaskWarriorMode == 0)
       :close
    else
       :split task
       :TW
    endif
endfunction