#!/bin/bash
#Assignment 4 by Rehan Lakhani

#Script interface
#Declaring Variables
leave=no
while [ $leave = no ]
do
clear
cat<<EOF

Welcome to the user management script $USER
1) Create a new user
2) Delete a user
3) Modify a user
4) See last 10 created users
5) Quit
Please enter in a number:
EOF
read selection
case $selection in
	1)
	if [ $selection -eq 1 ]; then
	clear
		if [ $USER == root ]; then
			read -p "Enter username: " username
			read -p "Enter home directory: " homeDir
			read -p "Enter users fullname: " fullName
			read -p "Enter users shell: " uShell
			egrep "^$username" /etc/passwd >/dev/null
			if [ $? -eq 0 ]; then
				echo "$username Exists!"
				continue
			else
				useradd -c "$fullName" -d "$homeDir" -m $username  -s "$uShell"
				passwd $username
				[ $?  -eq 0 ] &&  echo "User has been added to the system!"  || echo "Failed to add user"
				continue
			fi
		else
			echo "Only the root user can add a user to the system"
		fi
	;;
	2)
	if [ $selection -eq 2 ]; then
	clear
		if [ $USER == root ]; then
			read -p "Enter username: " username
			read -p "Do you wish to delete the users home directory [y/n]: " answer
			if [[ $answer == "y" || $answer == "Y" ]]; then
				userdel -r $username
			elif [[ $answer == "n" || $answer == "N" ]]; then
				userdel $username
				echo "Users home directory was not removed"
			fi
		else
			echo "Only the root user can remove a user from the system!"
		fi
	fi
	;;
	3)
	elif [ $selection -eq 3 ]; then
		clear
		echo $testText3
	;;
	4)
	elif [ $selection -eq 4 ]; then
		clear
		echo $testText4
	;;
	5)
	elif [ $selection -eq 5 ]; then
		clear
		leave=yes
	fi
	*)
esac
done

if [ $selection -eq 1 ]; then ...
if [ $selection -eq 2 ]; then ...