/**
 * A model a member of a library
 * 
 * @author CSC 142
 * 
 */
public class LibraryMember {
	// A library member is identified by his/her ssn and
	// may have only 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 already initialized to
		// null
	}

	/**
	 * Borrows a book from the library given the title of the book. To borrow a
	 * book, the member must not have a book already.
	 * 
	 * @param title
	 *            the title of the book
	 * @return true if the operation was successful, and false if not.
	 */
	public boolean borrowBook(String title) {
		if (book == null) {
			book = new Book(title);
			System.out.println("The book titled \"" + title + 
					"\" has been checked out.");
			return true;
		} else {
			System.out.println("You can't check out another book.\n" +
					"You already have one.");
			return false;
		}
	}

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