smart closing of nvim buffers, quits if current buffer is last and asks for confirmation if buffer has unsaved changes

smartbdelete.lua

-- this probably isn't the most efficient way of doing this 
-- but i'm quite happy with it so i want to share it.


    -- function to check whether current buffer is modified
    local function modcheck()
        local current_buf = vim.api.nvim_get_current_buf()
        if vim.api.nvim_buf_get_option(current_buf, 'modified') then
            return true
        else
            return false
        end
    end

    -- check if buffer is last before deleting buffer or quitting nvim
    local function smart_bdelete()
        local listed_buffers = vim.fn.getbufinfo({ buflisted = 1 })
        if #listed_buffers <= 1 then
            if modcheck() then
                local choice = vim.fn.confirm("Buffer has unsaved changes", "&Save\n&Ignore\n&Cancel", 3)
                if choice == 1 then
                    vim.cmd("wq")
                elseif choice == 2 then
                    vim.cmd("q!")
                end
            else
                vim.cmd("q")
            end

        else
            if modcheck() then
                local choice = vim.fn.confirm("Buffer has unsaved changes", "&Save\n&Ignore\n&Cancel", 3)
                if choice == 1 then
                    vim.cmd("w")
                    vim.cmd("bdelete")
                elseif choice == 2 then
                    vim.cmd("bdelete!")
                end
            else
                vim.cmd("bdelete")
            end
        end
    end
    vim.keymap.set("n", "<leader>q", smart_bdelete, { desc = "Smart close buffer or quit" })