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1. The problem statement, all variables and given/known data:
Quote:
Write a bash (or Bourne) script that manages a book library database.
The script allows a user to add books to the database, check in/out a book, display books, print sorted reports and delete books. The script should be menu-based with the following options:
Main Menu:
1) Edit Submenu
2) Report Submenu
3) Quit
Edit Submenu:
1) Add a book
2) Display a book
3) Checkin book
4) Checkout book
5) Delete a book
6) Return to Main Menu
Report Submenu:
1) Sort by Author
2) Sort by Title
3) Display all checked-out books
4) Return to Main Menu
Each book entry consists of a Title, Author, Status, Borrower's name, and Check Out date. The status of a book could be in or out. The check out date and borrower's name would be empty if the status of a book is in.
The book entries must be kept in a text file (called .books) in the user's home directory with the following format:
The title of the book serves as the primary key, i.e. we cannot have two books with the same title.
The options within the Report submenu should produce a well formatted listing of the books.
Each of the sub-options in the Edit sub-menu should interact with the user as follows:
(1) Add a book: should prompt the user for the following:
Book Title:
Author:
This option should check to see if there is a book with the same title. If present, an error message should be generated otherwise the book should be added to the database.
(2) Display a book: should prompt the user for the book title:
Book Title:
After reading the book title, this option should verify if the book exists in the database; if not, an error message should be generated; otherwise the book should be displayed in a nice format.
(3) Checkin book: should prompt the user for the book title:
Book Title:
After reading the book title, this option should verify that the book exists and that it is checked out. If so, then the status should be changed in the database, otherwise an error message should be generated.
(4) Checkout book: should prompt the user for the book title and borrower's
name:
Book Title:
Borrower:
After reading the book title and name, this option should verify that the book exists and that it is checked in. If so, the status should be changed in the database, otherwise an error message should be generated. The system date should be used to update the checkout date.
(5) Delete book: should prompt the user for the book title:
Book Title:
After reading the book title, this option should verify that the book exists and that it is not checked out. If so, then the book entry should be deleted in the database, otherwise an error message should be generated.
Each of the sub-options in the Report sub-menu should interact with the user as follows:
(1) Sort by Author: should print a well formatted listing sorted by authors' names of all the books in the database.
(2) Sort by Title: same as (a) but sorting is on title.
(3) Display all checked-out books: should print a well formatting listing of books that are in out status, in ascending order of their check-out dates.
My first question pertains to the adding a book section, I'm unsure which command or conditional statement I need to use to test to see if a book is already in the text file or not.
2. Relevant commands, code, scripts, algorithms:
select and case commands for building menus in bash
some type of sort utility or either grep/awk for any report submenu coding
3. The attempts at a solution (include all code and scripts):
Code:
echo 'Main Menu:'
PS3="$USER, What would you like to do?: "
echo
status="out"
select reply in "Edit Submenu" "Report Submenu" "Quit"; do
case $reply in
"Edit Submenu")
echo 'Edit Submenu: '
echo
select subchoice in "Add a book" "Display a book" "Checkin book" "Checkout book" "Delete a book" "Return to Main Menu"; do
case $subchoice in
"Add a book")
printf 'Book Title: '
read title
echo -n $title > .books
printf 'Author: '
read author
echo -n $author >> .books
echo $status >> .books
;;
"Display a book")
printf 'Book Title: '
read title
;;
"Checkin book")
printf 'Book Title: '
read title
;;
"Checkout book")
printf 'Book Title: '
read title
echo 'Borrower: '
read borrower
;;
"Delete a book")
printf 'Book Title: '
read title
;;
"Return to Main Menu")
echo 'return'
;;
esac
break
done
;;
"Report Submenu")
echo 'Report Submenu'
echo
select reportchoice in "Sort by Author" "Sort by Title" "Display all checked-out books" "Return to Main Menu"; do
case $reportchoice in
"Sort by Author")
;;
"Sort by Title")
;;
"Display all checked-out books")
;;
"Return to Main Menu")
;;
esac
break
done
;;
"Quit")
echo "Goodbye"
;;
esac
break
done
exit
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Georgia State University
Atlanta, Ga
United States
Irina Astrovskaya CSC 3320
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
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