cleanup

#!/bin/bash
#
# Update the list of packages in 'data/purge.list' to suit your preferences
# Listed packages that are are not any system-crucial software to avoid breakage

# Remove unused preinstalled apps
function purge_unused {
	echo_message title "Starting 'purge_unused' function..."
	# Check list
	PURGED=$(dirname "$0")'/data/purge.list'
	# Draw window
	if (eval `resize` && whiptail \
		--title "Remove Un-used Pre-installed Applications" \
		--yesno "Current list of pre-installed applications to remove: \n\n$(for LINE in $(cat $PURGED); do echo '  '$LINE; done) \n\nAre you sure you want proceed?" \
		$LINES $COLUMNS $(( $LINES - 12 )) \
		--scrolltext ) then
		# Remove loop
		echo_message info 'Removing unused pre-installed applications...'
		for PACKAGE in $(cat $PURGED); do
			# Check if package is installed
			check_packages $PACKAGE
			EXITSTATUS=$?
			# If package is not installed
			if [ $EXITSTATUS = 1 ]; then
				# Show already installed message
				echo "Package '$PACKAGE' is already removed."
			else
				# Remove package
				echo_message info "'$PACKAGE' is installed. Removing..."
				# Admin privileges
				elevate_privilege "apt purge -y $PACKAGE"
				# Done
				echo_message success "'$PACKAGE' removal is complete."
			fi
		done
		# Done
		echo_message success 'Removal of unused packages complete.'
		whiptail --title "Finished" --msgbox "Your list of unwanted pre-installed applications have been removed." 8 64
		cleanup
	else
		cleanup
	fi
}

# Remove Orphaned Packages
function remove_orphans {
	echo_message title "Starting 'remove_orphans' function..."
	echo_message info 'Removing orphaned packages...'
	# Admin privileges
	elevate_privilege "apt autoremove -y $PACKAGE"
	# Done
	echo_message success 'Removal of orphaned packages complete.'
	whiptail --title "Finished" --msgbox "Orphaned packages have been successfully removed." 8 64
	cleanup
}

# Remove Leftover Config files
function remove_leftover_config {
	echo_message title "Starting 'remove_leftover_config' function..."
	echo_message info 'Removing leftover configuration files...'
	# Admin privileges
	elevate_privilege "dpkg --purge $(COLUMNS=200 dpkg -l | grep '^rc' | tr -s ' ' | cut -d ' ' -f 2)"
	# Done
	echo_message success 'Removal of leftover configuration files complete.'
	whiptail --title "Finished" --msgbox "Leftover configuration files have been removed." 8 64
	cleanup
}

# Clean apt cache
function clean_apt_cache {
	echo_message title "Starting 'clean_apt_cache' function..."
	echo_message info 'Cleaning package cache...'
	# Admin privileges
	elevate_privilege "apt clean"
	# Done
	echo_message success 'Package cache cleaned.'
	whiptail --title "Finished" --msgbox "Package cache has been cleaned." 8 64
	cleanup
}

# Remove old kernels
function clean_old_kernels {
  if (whiptail --title "Remove Outdated Kernels" --yesno "If you're not currently using the newest kernel installed on your system, the following may break it. \n\nAre you sure you want proceed?" 10 60) then
  echo_message title "Starting 'clean_old_kernels' function..."
  echo_message info 'Removing outdated kernel(s)...'
  # Admin privileges
  elevate_privilege "dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | grep -v linux-libc-dev | xargs apt -y purge"
  # Done
  echo_message success 'Kernels cleaned.'
  whiptail --title "Finished" --msgbox "Outdated kernels have been successfully removed." 8 78
  cleanup
  else
    cleanup
  fi
}
# Remove old log crash
function clean_old_crash {
 echo_message title "Starting 'clean_apt_cache' function..."
 echo_message info 'Cleaning old log crash...'
 # Admin privileges
 elevate_privilege "rm /var/crash/*"
 # Done
 echo_message success 'Old log crash cleaned.'
 whiptail --title "Finished" --msgbox "Old log crash has been cleaned." 8 78
 cleanup
}

# Cleanup System
function cleanup {
	echo_message title "Starting 'cleanup' function..."
	EXITSTATUS=$?
	if [ $EXITSTATUS = 0 ]; then
		# Draw window
		$(eval `resize`&& whiptail \
		--notags \
		--title "System Cleanup" \
		--menu "\nWhat would you like to do?" \
		--cancel-button "Go Back" \
		$LINES $COLUMNS $(( $LINES - 12 )) \
		clean_apt_cache			'Clean package cache' \
		remove_leftover_config	'Remove leftover configuration files' \
		remove_orphans  'Remove orphaned packages' \
		purge_unused			'Remove unused pre-installed packages' \
    clean_old_crash 'Remove old log crash' \
    clean_old_kernels 'Remove old kernel(s)' \
		3>&1 1>&2 2>&3)
	else
		main
	fi
}