BASH script allows user to work with Bluetooth in CLI

BluetoothCLI.sh

#!/bin/bash


clear
echo -e "\n\t\t#Bluetooth script by Horloge-Skynet.\n"
echo -e "\t\033[1;31m/!\ Be sure that your Hardware Bluetooth is running... /!\ \033[0m \n\n"

if [ -d /usr/share/doc/bluez/ ] || [ -d /usr/share/doc/bluez-utils/ ]; then

	echo -e "Bluetooth of \033[1m$USER\033[0m on \033[1m$HOSTNAME\033[0m with \033[1m$SHELL\033[0m:"

	while [ true ]; do

		sleep 1.5

		echo -e "\n\n\tMENU:"
		echo -e "\n1)\t\033[37mService: Status\033[0m"
		echo -e "2)\t\033[32mService: Start\033[0m"
		echo -e "3)\t\033[31mService: Stop\033[0m"
		echo -e "4)\t\033[36mService: Restart\033[0m"
		echo -e "5)\t\033[32mShow Device.\033[0m"
		echo -e "6)\t\033[31mHide Device.\033[0m"
		echo -e "7)\t\033[37mDevice Informations...\033[0m"
		echo -e "8)\t\033[33mChange Device Name...\033[0m"
		echo -e "9)\t\033[35mScan for others Devices...\033[0m"
		echo -e "10)\t\033[32mPair a Device...\033[0m"
		echo -e "11)\t\033[31mUnpair a Device...\033[0m"
		echo -e "12)\tExit.\n"

		read -p "Choice ? " -n 2 choice
		echo -e "\n"

		sleep 1

		case $choice in
			'1')
				/etc/init.d/bluetooth status
				;;

			'2')
				/etc/init.d/bluetooth start
				/etc/init.d/bluetooth status
				;;

			'3')	
				/etc/init.d/bluetooth stop
				/etc/init.d/bluetooth status
				;;

			'4')
				/etc/init.d/bluetooth restart
				/etc/init.d/bluetooth status
				;;

			'5')
				hciconfig hci0 piscan
				sleep 1
				echo -e "\033[32mDevice might be Showed.\033[0m"
				;;

			'6')
				hciconfig hci0 noscan
				sleep 1
				echo -e "\033[31mDevice might be Hidden.\033[0m"
				;;

			'7')
				hcitool dev
				;;

			'8')
				read -p "Device Name: " device_name
				hciconfig hci0 name $device_name
				/etc/init.d/bluetooth restart
				/etc/init.d/bluetooth status
				;;

			'9')
				hcitool scan
				;;


			"10")
				hcitool scan

				read -p "Which Device ? (line number expected) " -n 1 device
				let "device += 1"
				echo -e "\n"

				ADDR=$(hcitool scan | sed -n '/'"$device"'/p' | cut -c 2-19);
				rfcomm connect hci0 $ADDR
				;;

			"11")
				MAC=$(hcitool dev | grep 'hci' | cut -c 7-);
				echo -e "\nDevice(s) Paired:"

				if [ -e /var/lib/bluetooth/$MAC/names ]; then

					while read line
					do

						echo -e "$line"

					done < /var/lib/bluetooth/$MAC/names

					echo -e "\n"
					read -p "Do you want to delete a Device ? (y/n) " -n 1 sure
					echo -e "\n"

					if [ $sure = 'y' ] || [ $sure = 'Y' ]; then
						
						read -p "Which Device to delete ? (line number expected) " -n 1 deletion
						echo -e "\n"

						MAC_deleted=$(sed '/'"$deletion"'/p' /var/lib/bluetooth/$MAC/names | cut -c 19-)

						touch /var/lib/bluetooth/$MAC/names_temp

						chmod 777 /var/lib/bluetooth/$MAC/names
						chmod 777 /var/lib/bluetooth/$MAC/names_temp

						sed ''"$deletion"'d' /var/lib/bluetooth/$MAC/names > /var/lib/bluetooth/$MAC/names_temp
						cat /var/lib/bluetooth/$MAC/names_temp > /var/lib/bluetooth/$MAC/names

						rm /var/lib/bluetooth/$MAC/names_temp

						echo -e "\033[32m$MAC_deleted might be Unpaired.\033[0m"

					fi
				fi
				;;

			"12")
				echo -e "\nThis script will be closed."
				sleep 1
				clear
				exit 1
				;;

			*)
				echo -e "Bad Choice.\n"
				;;
		esac

	done

else

	echo "\033[31mThere is no any Bluetooth Support installed, or it is broken."
	read -p "Do you want to install one ? (y/n) " -n 1 check
	echo -e "\n"

	if [ $check = 'y' ] || [ $check = 'Y' ]; then

		apt-get update && apt-get install bluetooth > /dev/null
		wait
		echo -e "\nPlease, consider re-executing this script.\n\n"

	else

		echo -e "\nThis script will be closed."
		sleep 1
		clear

	fi

fi

echo 0