#!/bin/bash
# Author: Joshua Bailey
# Script: multiUserAdd
# Summary: Adds multiple users from a 
#	   specified file.
# Syntax: multiUserAdd <fileToAddFrom>
# Syntax of fileToAddFrom: "UserName:Password:GroupName:FullName"

if [[ ! `id -u` = 0 ]]
then
	echo "*** Error:: you must be root to use this ***"
	exit
fi

if [[ ! $# > 0 ]]
then
	read -p "Please enter the file you want to use (/path/to/filename): " fileTo

elif [[ $# == 1 ]]
then
	fileTo=$1
fi

if [[ ! -e $fileTo ]]
then
	echo "*** Error:That file does not exist! ***"
fi

((recCount=0))

# until there are no more records in the file
# loop
until ! read Record
do
	((recCount++))
	errorFlag=n

	# put each line into a file called tempRecord
	# it gets written over ever instance of the loop
	echo $Record > tempRecord

	# cut up the record within the file at each instance
	# assign each variable the part you chopped
	group=`cut -d: -f3 tempRecord`
	name=`cut -d: -f4 tempRecord`
	password=`cut -d: -f2 tempRecord`
	un=`cut -d: -f1 tempRecord`
	
	# some very very basic validation checking (not finished)
	if [[ ${#group} == 0 ]]
	then
		errorFlag=y
		echo "*** Error:Missing group for record $recCount ***"
		errorMsg="$errorMsg:missing group"
		#echo "Record $recCount:$Record - Missing group" >> errorReport
	else	

		# see if the group exists...if not create it
		# first seperate the groups from the group file
		cut -d: -f1 /etc/group > tempGroup
	
		# check each group to see if it matches the group we want
		until ! read Record
		do
			# if the group matches what we want...set our flag
			if [[ $Record != $group ]]
			then
				gmflag=1
			else
				gmflag=0
			fi

		done < tempGroup	
	
		# if our flag was set...we need to create the group
		if [[ $gmflag == 1 ]]
		then
			groupadd -r $group
		fi

	fi
	if [[ ${#name} == 0 ]]
	then
		errorFlag=y
		echo "*** Error:Missing fullname for record $recCount ***"
		errorMsg="$errorMsg:missing fullname"
		#echo "Record $recCount:$Record - Missing fullname" >> errorReport
	fi

	if [[ ${#un} == 0 ]]
	then
		errorFlag=y
		echo "*** Error:Missing username for record $recCount ***"
		errorMsg="$errorMsg:missing username"
		#echo "Record $recCount:$Record - Missing username" >> errorReport
	fi

	if [[ ${#password} == 0 ]]
	then
		errorFlag=y
		echo "*** Error:Missing password for record $recCount ***"
		errorMsg="$errorMsg:missing password"
		#echo "Record $recCount:$Record - Missing password" >> errorReport
	fi

	if [[ $errorFlag == y ]]
	then
		echo "Record $recCount in file $fileTo - $Record: - $errorMsg" >> errorReport
	else
	
	# encrypt the password for useradd
	if [[ ${#password} > 0 ]]
	then
		# this beautiful line of code came from 25ft
		# without this...the automation wouldn't work
		# you can thank him later
		newPass=`openssl passwd -1 $password`
	fi

	# -g sets group, -d specifies default login directory, -m forces the making of the
	# directory if it doesn't exist
	useradd -g $group -p $newPass -d /home/$un -c $name -m $un

	# if the above command ran right...
	if [[ $? == 0 ]]
	then
		# tell us
		echo "*** User created successfully ***"

		# begin creating the report
		echo -n "$name:$un:" >> reportFile

		# get the userid and groupid of each user
		userid=`id -u $un`
		groupid=`id -g $un`
		echo -n "$userid:$groupid:" >> reportFile

		# add the date that all this was performed
		cur_date=`date "+%B%e %Y"`
		echo $cur_date >> reportFile
	fi
	fi
done < $fileTo

# delete the temporary file created for each record
rm -f tempRecord
rm -f tempGroup