Introduction to Unix - Integrated Assessment

29rohitkr

Feb 23rd, 2023

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echo "Enter your Username :"
read username
echo "Enter your password :"
read password
isValidUsername() {
local re='^[[:upper:]_][[:lower:][:digit:]_-]{2,15}$'
(( ${#1} > 16 )) && return 1
[[ $1 =~ $re ]] # return value of this comparison is used for the function
}
menu_choice='g'
set_menu_choice(){
echo '**********Welcome **********'
printf '\n'
printf '\ta) Issue Book\n'
printf '\tb) Return Book\n'
printf '\tc) Check Pending Return\n'
printf '\td) Check Book Availability\n'
printf '\te) Add New Member\n'
printf '\tf) Delete Book\n'
printf '\tg) Exit\n'
printf 'Please Enter your choice : \n'
read menu_choice
return
}
issue_book(){
printf 'Enter Membership Number : '
read mem_number
printf 'Enter the Book ISBN : '
read book_isbn
temp1=`grep "$mem_number" Members.txt | wc -l`
if [[ "$temp1" -eq 0 ]]; then
printf 'Member not available\n'
fi
temp2=`grep "$book_isbn" Book_Details.txt | wc -l`
if [ $temp2 -eq 0 ]; then
printf 'Book not available\n'
fi
if [[ $temp1 -ge 1 && $temp2 -ge 1 ]]; then
total_issued=`grep "$mem_number" Issue_Logs.txt | wc -l`
last_record=`tail -1 Issue_Logs.txt | cut -d'#' -f1`
issue_no=$(($last_record + 1))
issued_date=`date +"%d/%m/%Y"`
total_not_returned=`grep "$mem_number" Issue_Logs.txt | grep "Issued" | wc -l`
if [ $total_not_returned -ge 3 ]; then
printf 'More than 3 books cannot be issued\n'
else
record="$issue_no#$mem_number#$book_isbn#$issued_date#Issued"
`echo $record >> Issue_Logs.txt`
echo -e "Book Issued with issue number : $issue_no\n"
fi
fi
}
return_book(){
printf 'Enter Issue No : '
read issue_no
is_there=`grep -w "$issue_no" Issue_Logs.txt |wc -l`
issue_no=$(($issue_no + 1))
if [ $is_there -eq 1 ]; then
`sed -i "${issue_no}s/Issued/Returned/" Issue_Logs.txt`
printf 'Book Returned Successfully\n'
else
printf 'No issue record available for the given issue number\n'
fi
}
chech_pending_return(){
echo 'Enter Membership Number : '
read mem_number
grep "$mem_number" Issue_Logs.txt | grep "Issued" > Record_file
record_count=`grep "$mem_number" Issue_Logs.txt | grep "Issued" | wc -l`
if [ $record_count -eq 0 ]; then
printf 'No pending returns\n'
else
echo "*******************"
cat Record_file
rm Record_file
echo "*******************"
fi
}
check_book_avail(){
printf 'Enter Book Name '
read book_name
rec_count=`grep "$book_name" Book_Details.txt | wc -l`
if [ $rec_count -eq 1 ]; then
grep "$book_name" Book_Details.txt
printf '\n'
else
print 'No book available\n'
fi
}
add_new_member(){
printf 'Enter Name : '
read name
printf 'Enter Phone Number : '
read phnumber
printf 'Enter Email Id : '
read email
emailValid=0
phValid=0
nameValid=0
if [[ "$email" =~ ^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$ ]]; then
emailValid=1
fi
if [[ "$phnumber" =~ ^[1-9]{10}$ ]]; then
phValid=1
fi
if [[ $phValid -eq 1 && $emailValid -eq 1 ]]; then
count=`grep "$name" Members.txt | grep "$phnumber" Members.txt | wc -l`
if [ $count -ge 1 ]; then
mem_num=`grep "$name" Members.txt | grep "$phnumber" Members.txt| tr '::' ':' | cut -d':' -f1 `
echo "Member already available with the Id:$mem_num"
else
count_record=`cat Members.txt | wc -l`
number=$(( $count_record + 1000 - 1 ))
record="M$number::$name::$phnumber::$email"
`echo $record >> Members.txt`
echo "Member Added with Membership Number:M$number"
fi
else
echo "Please enter valid Details"
fi
}
delete_book(){
echo 'Enter the Book ISBN number : '
read book_isbn
count=`grep "$book_isbn" Book_Details.txt | wc -l`
if [ $count -eq 1 ]; then
echo "Please confirm, do you want to delete this book? Y/N"
read choice
if [[ $choice -eq 'Y' || $choice -eq 'y' ]]; then
record=`grep "$book_isbn" Book_Details.txt`
`sed -i "/${book_isbn}/d" Book_Details.txt`
echo "Book with ISBN $book_isbn is Deleted."
else
echo 'please enter valid key'
fi
else
echo "Book Not Found with ISBN : $book_isbn"
fi
}
if isValidUsername "$username" -a [[ "$password" =~ ^[[:alpha:][:digit:]_-]{3,15}$ ]]; then
valid=`grep $username Employee.txt | grep $password |wc -l`
if [[ $valid -eq 1 ]]; then
quit="n"
while [ "$quit" != "y" ];
do
set_menu_choice
case "$menu_choice" in
'a') issue_book;;
'b') return_book;;
'c') chech_pending_return;;
'd') check_book_avail;;
'e') add_new_member;;
'f') delete_book;;
'g') quit="y";;
'*') prinf "Enter Correct Choice";;
esac
done
else
printf 'Password or Username Invalid\n'
fi
else
echo "Invalid Username"
fi

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