system_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 pre-installed apps
function purge_unused {
	NAME="Unused Pre-installed Applications"
	echo_message title "Removing ${NAME,,}..."
	# Check list
	LIST=$(dirname "$0")'/data/purge.list'
	# Draw window
	if (eval `resize` && whiptail \
		--title "Remove $NAME" \
		--yesno "Current list of ${NAME,,} to remove: \n\n$(cat $LIST) \n\nAre you sure you want proceed?" \
		$LINES $COLUMNS $(( $LINES - 12 )) \
		--scrolltext ) then
		# Remove loop
		for PACKAGE in $(cat $LIST); do
			# If package is not installed
			if [ $(check_package_installed $PACKAGE) != 0 ]; then
				# Show already removed message
				echo_message info "Package '$PACKAGE' already removed."
			else
				# Remove package
				echo_message info "'$PACKAGE' is installed. Removing..."
				# Admin privileges
				superuser_do "apt remove -y $PACKAGE"
				# Finished
				echo_message success "'$PACKAGE' removal is complete."
			fi
		done
		# Finished
		echo_message success "Removal of ${NAME,,} complete."
		whiptail --title "Finished" --msgbox "Unwanted ${NAME,,} have been removed." 8 56
		system_cleanup
	else
		# Cancelled
		echo_message success "Removal of ${NAME,,} cancelled."
		system_cleanup
	fi
}
# Remove pre-installed apps
function purge_snaps {
	NAME="Unused Pre-installed Snaps"
	echo_message title "Removing ${NAME,,}..."
	# Check list
	LIST=$(dirname "$0")'/data/purge-snaps.list'
	# Draw window
	if (eval `resize` && whiptail \
		--title "Remove $NAME" \
		--yesno "Current list of ${NAME,,} to remove: \n\n$(cat $LIST) \n\nAre you sure you want proceed? \n\n(It may be worthwhile to reinstall some of these as traditional packages.)" \
		$LINES $COLUMNS $(( $LINES - 12 )) \
		--scrolltext ) then
		# Remove loop
		for PACKAGE in $(cat $LIST); do
			# If package is not installed
			if [[ $(snap list | grep $PACKAGE &> /dev/null; echo $?) != 0 ]]; then
				# Show already removed message
				echo_message info "snap '$PACKAGE' already removed."
			else
				# Remove package
				echo_message info "snap '$PACKAGE' is installed. Removing..."
				# Admin privileges
				superuser_do "snap remove $PACKAGE"
				# Finished
				echo_message success "'$PACKAGE' removal is complete."
			fi
		done
		# Finished
		echo_message success "Removal of ${NAME,,} complete."
		whiptail --title "Finished" --msgbox "Unwanted ${NAME,,} have been removed." 8 56
		system_cleanup
	else
		# Cancelled
		echo_message success "Removal of ${NAME,,} cancelled."
		system_cleanup
	fi
}

# Remove Orphaned Packages
function remove_orphans {
	echo_message info "Removing orphaned packages..."
	# Admin privileges
	superuser_do "apt autoremove -y $PACKAGE"
	# Done
	echo_message success "Removal of orphaned packages complete."
	whiptail --title "Finished" --msgbox "Orphaned packages have been successfully removed." 8 56
	system_cleanup
}

# Remove Leftover Config files
function remove_leftovers {
	echo_message info "Removing leftover configuration files..."
	# Admin privileges
	superuser_do "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 56
	system_cleanup
}

# Clean packages cache
function clean_apt_cache {
	echo_message info "Cleaning package cache..."
	# Admin privileges
	superuser_do "apt clean"
	# Done
	echo_message success "Package cache cleaned."
	whiptail --title "Finished" --msgbox "Package cache has been cleaned." 8 56
	system_cleanup
}

# Cleanup System
function system_cleanup {
	NAME="System Cleanup"
	echo_message title "Starting ${NAME,,}..."
	# Draw window
	CLEANUP=$(eval `resize` && whiptail \
		--notags \
		--title "$NAME" \
		--menu "\nWhat would you like to do?" \
		--cancel-button "Go Back" \
		$LINES $COLUMNS $(( $LINES - 12 )) \
		clean_apt_cache     'Clean package cache' \
		remove_orphans      'Remove orphaned packages' \
		remove_leftovers    'Remove leftover configuration files' \
		purge_unused        'Remove unused pre-installed packages' \
		purge_snaps         'Remove unused pre-installed snaps' \
		3>&1 1>&2 2>&3)
	# check exit status
	if [ $? = 0 ]; then
		echo_message header "Starting '$CLEANUP' function"
		$CLEANUP
	else
		# Cancelled
		echo_message info "$NAME cancelled."
		main
	fi
}