// lbook.h
// ----------------------------------------------------------------------
// Do not modify this file.
// declares class LibraryBook
// 
// CSE 143
// Homework 2, 3
// http://www.cs.washington.edu/education/courses/143/00su/homework/
// 25 Jun 2000; Ken Yasuhara


#ifndef _LBOOK_H_
#define _LBOOK_H_


#include "date.h"
#include "lpatron.h"


//////////////////////////////////////////////////////////////////////
// constants

const int MAX_TITLE_LENGTH = 120;
const int MAX_AUTHOR_LENGTH = 60;


//////////////////////////////////////////////////////////////////////
// class LibraryBook 

class LibraryBook {
public:  

  // 
  // constructors
  // 

  // all books are initially assumed to be checked in

  // constructs book w/ zero ID, null title, author
  LibraryBook();		

  // must provide positive ID nubmer, nonempty strings
  LibraryBook(int newID,
	      char newTitle[], 
	      char newAuthor[]);

  //
  // accessors 
  //
  
  // given a char array, copies this book's title into the array;
  // assumes that the size of the argument array is sufficient to store
  // a copy of the title string
  void getTitle(char spaceForTitleCopy[]);

  // same as getTitle but for this book's author
  void getAuthor(char spaceForAuthorCopy[]);

  // returns the book's ID number; book IDs are always > 0
  int getID();
  

  //
  // borrowing, returning books
  //

  // returns true if book is checked out by a patron
  bool isCheckedOut();

  // returns the user ID number of the patron who has this book
  // checked out; isCheckedOut() must be true
  int getBorrowerID();

  // returns due date of this book; isCheckedOut() must be true
  Date getDueDate();
  
  // returns true if given date is after this book's due date;
  // isCheckedOut() must be true
  bool isOverdue(Date today);	

  // returns number of days by which this book is overdue; isOverdue()
  // must be true
  int daysOverdue(Date today);

  // updates both this book and the given patron to reflect that the
  // patron checked out (borrowed) the book for the given number of
  // days (loanDuration) on the given date (today); isCheckedOut()
  // must be false
  void checkOut(Date today, LibraryPatron &borrower, int loanDuration);

  // updates both this book and the given patron to reflect that the
  // patron checked in (returned) the book; isCheckedOut() must be
  // true
  void checkIn(LibraryPatron &returner);

  // outputs book's ID number, title, author, and check-out status via
  // cout
  void printRecord();


private:

  // 
  // member data
  // 
  
  char title[MAX_TITLE_LENGTH];
  char author[MAX_AUTHOR_LENGTH];
  
  // set to 0 if this book is not checked out; set to borrower's user
  // ID (always > 0) when checked out
  int borrowerID;		

  // only valid when checked out
  Date dueDate;			

  // book's ID number; > 0; should not change after construction
  int ID;
};


#endif // _LBOOK_H_