// library.h
// ----------------------------------------------------------------------
// Do not modify this file.
// misc. library-related functions for use in main.cpp
// 
// CSE 143
// Homework 3
// http://www.cs.washington.edu/education/courses/143/00su/homework/
// 03 Jul 2000


#ifndef _LIBRARY_H_
#define _LIBRARY_H_

#include "lbooklst.h"
#include "lpatrlst.h"
//#include "lbook.h"


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

// in days
const int LOAN_DURATION = 21;

// overdue fines, in cents; used in computeFine
const int FIXED_FINE = 75;
const int PER_DAY_FINE = 15;


//////////////////////////////////////////////////////////////////////
// prototypes

// pauses until user types a non-whitespace character and Return
void waitForChar(void);

// computes fine in cents for a book overdue by given number of days;
// see constants above
int computeFine(int daysOverdue);

// reads given transaction log file and processes each transaction,
// printing per-transaction data and overdue fine information, if
// applicable; calls processTransaction once for each transaction
void processTransactionsFile(char fileName[], 
                             LibraryBookList &bookList,
			     LibraryPatronList &patronList);

// returns true if given date, user ID, and transaction code are all
// valid; i.e. date valid, user ID > 0, code == 'o' or 'i'
bool transactionIsValid(Date transactionDate, int userID, 
			char transactionCode);

// using given book and patron lists, attempts to update the
// appropriate element from each list according to the given
// transaction (check-in or -out)
void processTransaction(LibraryBookList &bookList,
			LibraryPatronList &patronList,
			Date transactionDate, int userID,
			char transactionCode, int bookID);

// called from processTransaction to verify that check-in or -out of
// the given book by the given patron is allowed, and to update the
// book and patron objects
void processCheckOut(LibraryBook &book, LibraryPatron &patron, Date date);
void processCheckIn(LibraryBook &book, LibraryPatron &patron, Date date);


#endif // _LIBRARY_H_