zsh rm function, replaces default rm with srm (including daemonizing long delete operations with screen)

.zshrc_rm

function rm () {
if [ -z $1 ] ; then
        echo "Error: No file specified\n"
        return 1;
else
        if [[ -f $1 ]]; then
                FILESIZE=$(stat -c%s "$1")
                if [[ $FILESIZE -gt 10485760 ]]; then
                        screen -dmS srm zsh -c "srm -rvzf $1; notify-send \"File-remove operation on file '$1' has completed.\"; beep -f 900 -l 100 -D 50; beep -f 1800 -l 200"
                        echo "This file-remove operation will take a while, so it's been executed in the background (screen).\n"
                        screen -ls | grep srm
                else
                        srm -rvzf $1; echo "File-remove operation on file \"$1\" completed.\n"
                fi
        else
                echo "Error: File \"$1\" does not exist.\n"
                return 1;
        fi
fi
}