Beginner bash scripting - bash

Question

I want to break down a file that has multiple lines that follow this style:
e-mail;year/month/date;groups;sharedFolder
An example line from file:
alan.turing#cam.ac.uk;1912/06/23;visitor;/visitorData
Essentially I want to break each line up into four arrays that can be accessed later on in a loop to create a new user for each line.
I have declared the arrays already have a file saved as variable 'filename'
Usernames need to be the first three letters of the surname and the first three letters of the first name.
Passwords need to be the users birthdate as day/month/year.
So far this is what I have. Am I on the right track? Are there places I have gone wrong or could improve on?
#reads file and saves into appropriate arrays
while read -r line
do
IFS = $';' read -r -a array <<< "$line"
mailArray += "$(array[0])"
dateArray += "$(array[1])"
groupArray += "$(array[2])"
folderArray += "$(array[3])"
done < $filename
#create usernames from emails
for i in "$(mailArray[#])"
do
IFS=$'.' read -r -a array <<< "$i"
part1 = ${array[0]:0:3}
part2 = ${array[1]:0:3}
user = $part2
user .= $part1
userArray += ("$user")
done
#create passwords from birthdates
for i in "$(dateArray[#])"
do
IFS=$'/' read -r -a array <<< "$i"
password = $part3
password .= $part2
password .= $part1
passArray += ("$password")
done

Answer 1

Not sure if arrays are required here, and if you just want to create username, password from the lines in the desired format, please see below:
# Sample Input Data:
bash$> cat d
alan.turing#cam.ac.uk;1912/06/23;visitor;/visitorData
rob.zombie#cam.ac.uk;1966/06/23;metalhead;/metaldata
donald.trump#stupid.com;1900/00/00;idiot;/idiotique
bash$>
# Sample Output from script:
bash$> ./dank.sh "d"
After processing the line [alan.turing#cam.ac.uk;1912/06/23;visitor;/visitorData], we have the following parameters extracted:
Name: alan
Surname: turing
Birthdate: 1912/06/23
username: alatur
Password: 1912/06/23
After processing the line [rob.zombie#cam.ac.uk;1966/06/23;metalhead;/metaldata], we have the following parameters extracted:
Name: rob
Surname: zombie
Birthdate: 1966/06/23
username: robzom
Password: 1966/06/23
After processing the line [donald.trump#stupid.com;1900/00/00;idiot;/idiotique], we have the following parameters extracted:
Name: donald
Surname: trump
Birthdate: 1900/00/00
username: dontru
Password: 1900/00/00
Now the script, which does this operation.
# Script.
bash$> cat dank.sh
#!/bin/bash
cat "$1" | while read line
do
name=`echo $line | sed 's/^\(.*\)\..*\#.*$/\1/g'`
surname=`echo $line | sed 's/^.*\.\(.*\)\#.*$/\1/g'`
bdate=`echo $line | sed 's/^.*;\(.*\);.*;.*$/\1/g'`
temp1=`echo $name | sed 's/^\(...\).*$/\1/g'`
temp2=`echo $surname | sed 's/^\(...\).*$/\1/g'`
uname="${temp1}${temp2}"
echo "
After processing the line [$line], we have the following parameters extracted:
Name: $name
Surname: $surname
Birthdate: $bdate
username: $uname
Password: $bdate
"
done
bash$>
Basically, i am just running couple of sed commands to extract what is useful and required, and storing them in variables and then one could use them anyways they want to. You could redirect them to a file if you want or print out a pipe separated output.. upto you.
Let me know..