Neovim Rotate Windows command

rotate_windows.lua

vim.api.nvim_create_user_command("RotateWindows", function()
	local ignored_filetypes = { "NvimTree", "fidget", "Outline" }
	local window_numbers = vim.api.nvim_tabpage_list_wins(0)
	local windows_to_rotate = {}

	for _, window_number in ipairs(window_numbers) do
		local buffer_number = vim.api.nvim_win_get_buf(window_number)
		local filetype = vim.bo[buffer_number].filetype

		if not vim.tbl_contains(ignored_filetypes, filetype) then
			table.insert(windows_to_rotate, { window_number = window_number, buffer_number = buffer_number })
		end
	end

	local num_eligible_windows = vim.tbl_count(windows_to_rotate)

	if num_eligible_windows == 0 then
		return
	elseif num_eligible_windows == 1 then
		vim.api.nvim_err_writeln("There is no other window to rotate with.")
		return
	elseif num_eligible_windows == 2 then
		local firstWindow = windows_to_rotate[1]
		local secondWindow = windows_to_rotate[2]

		vim.api.nvim_win_set_buf(firstWindow.window_number, secondWindow.buffer_number)
		vim.api.nvim_win_set_buf(secondWindow.window_number, firstWindow.buffer_number)
	else
		vim.api.nvim_err_writeln("You can only swap 2 open windows. Found " .. num_eligible_windows .. ".")
	end
end, {})