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/*
* Copyright 2005-2008 Fabrice Colin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _QUERY_HISTORY_H
#define _QUERY_HISTORY_H
#include <string>
#include <vector>
#include <set>
#include "DocumentInfo.h"
#include "SQLiteBase.h"
/// Manages query history.
class QueryHistory : public SQLiteBase
{
public:
QueryHistory(const std::string &database);
virtual ~QueryHistory();
/// Creates the QueryHistory table in the database.
static bool create(const std::string &database);
/// Inserts an URL.
bool insertItem(const std::string &queryName, const std::string &engineName,
const std::string &url, const std::string &title, const std::string &extract, float score);
/**
* Checks if an URL is in the query's history.
* If it is, it returns the current and previous scores; returns 0 if not found.
*/
float hasItem(const std::string &queryName, const std::string &engineName, const std::string &url,
float &previousScore);
/// Gets the list of engines the query was run on.
bool getEngines(const std::string &queryName, std::set<std::string> &enginesList);
/// Gets the first max items for the given query, engine pair.
bool getItems(const std::string &queryName, const std::string &engineName,
unsigned int max, std::vector<DocumentInfo> &resultsList);
/// Gets an item's extract.
std::string getItemExtract(const std::string &queryName, const std::string &engineName,
const std::string &url);
/// Finds URLs.
bool findUrlsLike(const std::string &url, unsigned int count,
std::set<std::string> &urls);
/// Gets a query's latest run times.
bool getLatestRuns(const std::string &queryName, const std::string &engineName,
unsigned int runCount, std::set<time_t> &runTimes);
/// Deletes items at least as old as the given date.
bool deleteItems(const std::string &queryName, const std::string &engineName,
time_t cutOffDate);
/// Deletes items.
bool deleteItems(const std::string &name, bool isQueryName);
/// Expires items older than the given date.
bool expireItems(time_t expiryDate);
private:
QueryHistory(const QueryHistory &other);
QueryHistory &operator=(const QueryHistory &other);
};
#endif // _QUERY_HISTORY_H
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