/**
 * A simple model of a member of a library
 * 
 * @author CSC 142
 * 
 */
public class LibraryMember {
	// A library member is defined by his/her ssn
	// and can have at most one book
	private int ssn;
	private Book book;

	/**
	 * Creates a library member given his/her ssn. Initially the member doesn't
	 * have a book.
	 * 
	 * @param ssn
	 *            the social security number of the member
	 */
	public LibraryMember(int ssn) {
		this.ssn = ssn;
		book = null; // not needed since book is
		// automatically initialized to null
	}

	/**
	 * Borrows a book given the title of the book. The operation is successful
	 * only if the member didn't have a book
	 * 
	 * @param title
	 *            the title of the book to borrow.
	 * @return true if successful, or false if not
	 */
	public boolean borrowBook(String title) {
		if (book == null) {
			// the member doesn't have a book
			// and can borrow one.
			book = new Book(title);
			System.out.println("The book titled " + title
					+ " has been borrowed.");
			return true;
		} else {
			// the member can't borrow another book
			System.out
					.println("You can't borrow this book.\nYou already have \""
							+ book.getTitle() + "\".");
			// \n prints a new line
			// \t prints a tab
			return false;
		}
	}

	/**
	 * Returns the book that the member has, if possible. Returns true if
	 * successful, or false if not.
	 * 
	 * @return true if the operation is successful, or false if not
	 */
	public boolean returnBook() {
		if (book != null) { 
			// the member has a book and 
			// wants to return it.
			System.out.println(
		    "The book titled \"" + book.getTitle() +
		    "\" has been returned.");
			book = null;
			return true;
		}
		else {
			// The member doesn't have a book
			System.out.println("You don't have a book!");
			return false;
		}
	}
}