File indexing completed on 2024-05-19 05:07:14

 /*
     SPDX-FileCopyrightText: 2011 Fernando Vilas <fvilas@iname.com>
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef MYMONEYBALANCECACHE_H
 #define MYMONEYBALANCECACHE_H
 
 // ----------------------------------------------------------------------------
 // QT Includes
 
 #include <QDate>
 #include <QHash>
 #include <QMap>
 #include <QObject>
 #include <QString>
 
 // ----------------------------------------------------------------------------
 // KDE Includes
 
 // ----------------------------------------------------------------------------
 // Project Includes
 
 #include "mymoneymoney.h"
 
 /**
  * This class associates a @ref MyMoneyMoney object with a QDate. It is
  * essentially a std::pair. The object is invalid if the QDate is invalid
  * and the balance is @ref MyMoneyMoney::minValue. A call to isValid
  * should be used in most cases before using an object.
  */
 class KMM_MYMONEY_EXPORT MyMoneyBalanceCacheItem
 {
 public:
 
     /**
      * The object should be instantiated with a balance and a date.
      *
      * @param balance a MyMoneyMoney object that holds the balance at the
      * end of the day
      * @param date the date for the object
      */
     MyMoneyBalanceCacheItem(const MyMoneyMoney& balance, const QDate& date);
 
     /**
      * Accessor function for the balance as a MyMoneyMoney object.
      *
      * @return the balance in the object
      */
     const MyMoneyMoney& balance() const;
 
     /**
      * Accessor function for the date as a QDate object.
      *
      * @return the date in the object
      */
     const QDate& date() const;
 
     /**
      * Check the validity of the object
      *
      * @return true if the date is valid, false otherwise
      */
     bool isValid() const;
 
 private:
     MyMoneyMoney m_balance;
     QDate m_date;
 };
 
 /**
  * This class provides a balance cache. It holds balances by account and date,
  * so the most recent balance could be obtained to reduce the number of
  * transactions required to calculate a balance for a later date. This class
  * is intended to be used at the @ref MyMoneyFile layer.
  */
 class KMM_MYMONEY_EXPORT MyMoneyBalanceCache : public QObject
 {
     Q_OBJECT
 public:
 
     /**
      * Remove all balances from the cache
      */
     void clear();
 
     /**
      * @return true if there are no balances in the cache, otherwise false
      */
     bool isEmpty() const;
 
     /**
      * This function returns the size of the cache.
      *
      * @note  It has linear complexity O(num of accounts), so do not
      * call it in a loop if there are many accounts stored in it or
      * performance is an issue.
      *
      * @return the number of balances currently in the cache
      */
     int size() const;
 
     /**
      * This function retrieves the balance from the cache. The balance is
      * invalid if the cache does not contain a balance on that date.
      *
      * @param accountId the account id to use to find the balance
      * @param date the date of the balance to retrieve
      *
      * @return the balance of the account at the end of the date given
      */
     MyMoneyBalanceCacheItem balance(const QString& accountId, const QDate& date) const;
 
     /**
      * This function retrieves the balance from the cache having a date less
      * than or equal to the date given. The balance is invalid if the cache
      * does not contain a balance on or before that date for the account given
      *
      * @param accountId the account id to use to find the balance
      * @param date the latest date of the balance to retrieve
      *
      * @return the balance of the account at the end the nearest day on or
      * before the date provided
      */
     MyMoneyBalanceCacheItem mostRecentBalance(const QString& accountId, const QDate& date) const;
 
     /**
      * This function inserts the balance into the cache for the account on
      * the date provided. If a balance already exists for that account and
      * date, it is updated to the one provided.
      *
      * @param accountId the account id
      * @param date the date of the balance
      * @param balance the balance of the account at the end the day
      */
     void insert(const QString& accountId, const QDate& date, const MyMoneyMoney& balance);
 
 public Q_SLOTS:
     /**
      * Remove all balances associated with a given account from the cache
      */
     void clear(const QString& accountId);
 
     /**
      * Remove all balances on or after the date associated with an account
      * from the cache
      */
     void clear(const QString& accountId, const QDate& date);
 
 private:
     typedef QHash<QString, QMap<QDate, MyMoneyMoney> > BalanceCacheType;
     BalanceCacheType m_cache;
 };
 
 #endif