Someone

#!/bin/bash

mountpoint="/media/player"
deviceid="041e:4153"

if mount | grep mtpfs > /dev/null; then
    if fusermount -u "$mountpoint"; then
        zenity --info --text "Player unmounted successfully."
    else
        zenity --error --text "Could not unmount, please close any open programs that are interfacing with the player."
    fi
else
    if lsusb | grep "$deviceid" > /dev/null; then
        if mtpfs "$mountpoint"; then
            zenity --info --text "Player mounted successfully."
        else
            zenity --error --text "Could not mount, please make sure the player is connected properly."
        fi
    else
            zenity --error --text "Could not find player with deviceid: $deviceid on the usb bus, check the cable."
    fi
fi