#ifndef BOOKSHELF_H
#define BOOKSHELF_H 
#include "book.h" 

/*
 * Class Bookshelf - a (singleton, for now) object representing
 * an aggregate collection of books.  The intention is one "master"
 * array of Book objects, with three "index" arrays, sorted three
 * different ways, on which we can do fast binary searches.
 */

class Bookshelf {
private:
   int   num;
   Book *books;
   Book **authorcatalog, **titlecatalog, **subjectcatalog;
   void add_book(string, string, string);
   void trim(string &s);

public:
   Bookshelf() { num=0; books = NULL; authorcatalog = titlecatalog = subjectcatalog = NULL; }
   void read_books(string);
   Book *search_title(string);
   Book *search_author(string);
   Book *search_subject(string);
   void insert_book(string,string,string);
   void delete_book(string,string,string);
   void delete_title(string);
   void delete_author(string);
   void delete_subject(string);
   void save_books(string);

};

#endif