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#! /bin/bash

#script for batch generating users for AECC's raspberry pi. All passwords are temporary and will need to be prompted for new passwords on first login

echo -ne "This script must be run as root!\nScript for creating users for AECC raspberry pi from a csv file.\nEnter path for csv file: "
read csv_file

#exit if not root
if [[ `id -u` != 0  ]]; then
    echo "Must be root to run script"
    exit 1
fi


if [[ ! -f "$csv_file" ]]
then
    echo "ERROR! File $csv_file does not exist. Run again with a valid file path"

else
    #read csv file which contains first name, last name, student number
    while IFS=, read fn ln sn
    do
        #get first char of first csv field (first letter of first name)
        user1=${fn:0:1}
        #get first last name 
        user2=$(echo "$ln" | cut -f 1 -d ' ')
	if [[ "$user2" == "de" ]] 
	then
		#dirty method. awk would probs be better but I wanna finish this quickly
		sfln=$(echo "$ln" | cut -f 2 -d ' ')
		user2+="$sfln"
		echo "$user2"
        fi
	#combine lowercasefirst letter of last name and first last name) into username variable
        user=$(echo "$user1$user2" | awk '{print tolower($0)}')
        passwd=$sn
        #change password for created user. I don't like this method, but I was having problems passing a hashed password
	useradd -m $user && echo "$user:$passwd" | chpasswd
	#echo "$user:$passwd"
	if [ $? -eq 0 ] 
	then
		echo "Created User:$user"
		echo "Used Password:$passwd"
	else
		echo "Error! Could not create user $user."
	fi

        done < $csv_file;
fi