install_functions

#!/bin/bash

# Install single package function
#
# ${1} = Name
# ${2} = package-name
# ${3} = return_function

function install_package() {
	echo_message header "Starting 'install_package' function..."
	# If package is not installed
	if [ $(check_package_installed ${2}) != 0 ]; then
		echo_message info "${2} is not installed. Installing..."
		if (whiptail \
			--title "Install ${1^}" \
			--yesno "Proceed with installation of ${1^}?" 8 56) then
			# Install
			echo_message info "Installing package '${2}'..."
			# Admin privileges
			superuser_do "apt install -y ${2}"
			# Finished
			echo_message success "Installation of package '${2}' is complete."
			whiptail --title "Finished" --msgbox "Installation of ${1} complete." 8 56
			# return
			${3}
		else
			# Cancelled
			echo_message info "Installation of ${1} cancelled."
			# return
			${3}
		fi
	else
		# Already installed
		echo_message info "Package '${2}' is already installed."
		whiptail --title "Finished" --msgbox "Installation of ${1} is already complete." 8 56
		# return
		${3}
	fi
}

# Install single remote package function
#
# ${1} = Name
# ${2} = package
# ${3} = https://remote.example.com/
# ${4} = return_function

function install_remote_package() {
	echo_message header "Starting 'install_remote_package' function..."
	# If package is not installed
	if [ $(check_package_installed ${2}) != 0 ]; then
		echo_message info "${1} is not installed."
		# Download Debian file that matches system architecture
		case `uname -i` in
			i386|i486|i586|i686)
				# Download 32 bit package
				echo_message info "Downloading remote package '${2}_i386.deb' from '${3}'..."
				curl -O ${3}/${2}_i386.deb
				;;
			x86_64)
				# Download 64 bit package
				echo_message info "Downloading remote package '${2}_amd64.deb' from '${3}'..."
				curl -O ${3}/${2}_amd64.deb
				;;
			*)
				whiptail --title "Error." --msgbox "No remote packages available to download." 8 56
				${4}
				;;
		esac
		# Install package(s)
		echo_message info "Installing '${2}' package..."
		superuser_do "dpkg -i ${2}*.deb"
		# Install depencies, if any
		echo_message info "Correcting any dependency errors..."
		superuser_do "apt install -fy"
		# Cleanup and finish
		rm ${2}*.deb
		# Done
		echo_message success "Installation of ${1} complete."
		whiptail --title "Finished" --msgbox "Installation of ${1} complete." 8 56
		${4}
	else
		# Already installed
		echo_message info "${1} already installed."
		whiptail --title "Finished" --msgbox "${1} is already installed." 8 56
		${4}
	fi
}

# Install from list function
#
# ${1} = Name
# ${2} = list-name
# ${3} = return_function

function install_from_list() {
	# echo_message header "Starting 'install_from_list' function..."
	echo_message title "Starting installation of ${1}..."
	# Variables
	LIST=$(dirname "$0")'/data/'${2}'.list'
	# Draw window
	if (eval `resize` && whiptail \
		--title "Install ${2^}" \
		--yesno "Current list of packages that will be installed: \n\n$(cat ${LIST}) \n\nWould you like to proceed?" \
		$LINES $COLUMNS $(( $LINES - 12 )) \
		--scrolltext \
		3>&1 1>&2 2>&3) then
		# Install loop
		for PACKAGE in $(cat $LIST); do
			# If package is not installed
			if [ $(check_package_installed $PACKAGE) != 0 ]; then
				# Install package
				echo_message warning "Package '$PACKAGE' is not installed. Installing..."
				# Admin privileges
				superuser_do "apt install -y $PACKAGE"
				# Check if failed
				if [[ $? != 0 ]]; then
					echo_message error "Error installing '$PACKAGE'."
				fi
			else
				# Show already installed message
				echo_message info "Package '$PACKAGE' is installed."
			fi
		done
		# Finished
		echo_message success "Installation of ${1} complete."
		whiptail --title "Finished" --msgbox "Installation of ${1} is complete." 8 56
		${3}
	else
		# Cancelled
		echo_message info "Installation of ${1} cancelled."
		${3}
	fi
}

# Install flatpak package
#
# ${1} = Name
# ${2} = remote
# ${3} = com.package.Name
# ${4} = return_function

function install_flatpak_package() {
	# echo_message header "Starting 'install_flatpak_package' function..."
	# If package is not installed
	if [[ $(flatpak list | grep ${3} &> /dev/null; echo $?) != 0 ]]; then
		echo_message info "${1} is not installed. Installing..."
		if (whiptail \
			--title "Install ${1}" \
			--yesno "The flatpak package for ${1} is not installed. \n\nProceed with installation of '${3}'?" 10 64) then
			# Install
			echo_message info "Installing flatpak '${3}'..."
			flatpak install -y ${2} ${3}
			# Finished
			echo_message success "Installation of '${3}' is complete."
			whiptail --title "Finished" --msgbox "Installation of ${1^} (Flatpak) complete." 8 56
			${4}
		else
			# Cancelled
			echo_message info "Installation of ${1^} cancelled."
			${4}
		fi
	else
		# Already installed
		echo_message info "Flatpak '${3}' is already installed."
		whiptail --title "Installed" --msgbox "${1^} is already installed." 8 56
		${4}
	fi
}

# Install snap package
#
# ${1} = Name
# ${2} = package
# ${3} = return_function

function install_snap_package() {
	# echo_message header "Starting 'install_snap_package' function..."
	# If package is not installed
	if [[ $(snap list | grep ${2} &> /dev/null; echo $?) != 0 ]]; then
		echo_message info "${1} is not installed. Installing..."
		if (whiptail \
			--title "Install ${1}" \
			--yesno "The snap package for ${1} is not installed. \n\nProceed with installation of '${2}'?" 10 64) then
			# Install
			echo_message info "Installing snap package '${2}'..."
			# Admin privileges
			superuser_do "snap install ${2}"
			# Finished
			echo_message success "Installation of '${2}' is complete."
			whiptail --title "Finished" --msgbox "Installation of ${1} is complete." 8 56
			${3}
		else
			# Cancelled
			echo_message info "Installation of ${1} cancelled."
			${3}
		fi
	else
		# Already installed
		echo_message info "Snap package '${2}' is already installed."
		whiptail --title "Installed" --msgbox "${1} is already installed." 8 56
		${3}
	fi
}