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331 lines
6.9 KiB
331 lines
6.9 KiB
/***************************************************************************
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database.h -
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-------------------
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begin : Fri Sep 8 2000
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copyright : (C) 2000 by Andrea Rizzi
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email : rizzi@kde.org
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* *
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* In addition, as a special exception, the copyright holders give *
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* permission to link the code of this program with any edition of *
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* the TQt library by Trolltech AS, Norway (or with modified versions *
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* of TQt that use the same license as TQt), and distribute linked *
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* combinations including the two. You must obey the GNU General *
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* Public License in all respects for all of the code used other than *
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* TQt. If you modify this file, you may extend this exception to *
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* your version of the file, but you are not obligated to do so. If *
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* you do not wish to do so, delete this exception statement from *
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* your version. *
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***************************************************************************/
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/*
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Translation search engine
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Copyright 2000
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Andrea Rizzi rizzi@kde.org
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*/
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#ifndef _DATABASE_H_
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#define _DATABASE_H_
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#include <config.h>
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#ifdef USE_DB_H_PATH
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#include USE_DB_H_PATH
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#else
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#ifdef HAVE_DB4_DB_H
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#include <db4/db.h>
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#else
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#include <db.h>
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#endif
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#endif
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#define uint32 u_int32_t
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#include <tqvaluelist.h>
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#include <tqptrlist.h>
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#include <tqstring.h>
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#include <tqobject.h>
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#include <tqdatetime.h>
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#include <tqcstring.h> //bytearray
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class WordItem // Returned by getWordLocations
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{
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public:
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WordItem(char *data,TQString w);
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WordItem(TQString w);
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//WordItem(const WordItem &wi);
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//WordItem& operator=(const WordItem & wi );
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//The word (key in database)
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TQString word;
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//Sorted locations
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//TQByteArray locations; //too many problems with this..
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//NOTE:
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//This is allocated only if you call WordItem(char *data,TQString w);
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//YOU MUST FREE IT when you do not need it anymore
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//No destructor will do it !!!
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uint32 *locations;
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uint32 count;
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//Is this word common ?
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int score;
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bool notFound();
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};
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class InfoItem
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{
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public:
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//Create the NO INFO item
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InfoItem();
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// Create an info item from raw data
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InfoItem(const char *rawData,TQString lang);
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TQString catalogName;
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TQString lastFullPath;
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TQString lastTranslator;
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TQDateTime revisionDate;
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TQString charset;
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TQString language;
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int size();
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void rawData(char *);
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};
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class TranslationItem
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{
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public:
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TQString translation;
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TQValueList<int> infoRef;
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uint32 numRef;
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};
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class DataBaseItem
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{
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public:
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/*
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Create empty class;
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*/
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DataBaseItem();
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/*
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Create a DataBaseItem from raw data
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*/
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DataBaseItem(char *_key,char *_data);
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/*
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return the size (in raw data) of this item.
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*/
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uint32 sizeData();
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uint32 sizeKey();
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bool isNull() { return (numTra==0); }
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/*
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You MUST allocate data of sizeData() byte.
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*/
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void toRawData(char *_data);
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void toRawKey(char *_key);
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TQString key;
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TQValueList<TranslationItem> translations;
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uint32 numTra;
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uint32 location;
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};
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class DataBaseManager : public TQObject
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{
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TQ_OBJECT
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public:
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/*
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Main constructor.
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directory is the name of the directory where the database structre
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is stored.
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DIRECTORY/translations.$LANG.db The trasnaltion archive
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DIRECTORY/catalogsinfo.$LANG.db Info about catalogs
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//Not yet implemented
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DIRECTORY/wordsindex.$LANG.db Index of words
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*/
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DataBaseManager(TQString directory,TQString lang,TQObject *parent=0,const char *name=0);
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~DataBaseManager();
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/*
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Create a new databse structure.
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*/
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int createDataBase(TQString directory,TQString language,int mode=0664);
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/*
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Put a DataBaseItem into the database.
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if ow==false enter the new DataBaseItem only
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if the key of DataBaseItem does not previously exist
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It also update the wordIndex.
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*/
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int putItem(DataBaseItem *item,bool ow=false);
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DataBaseItem getItem(TQString key);
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/*
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@return the first entry in the database.
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*/
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DataBaseItem firstItem();
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/*
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@return the current entry of the database.
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*/
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DataBaseItem currentItem();
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/*
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@return the next entry in the database.
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*/
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DataBaseItem nextItem();
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/*
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* Add a new translation to the database
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* catalog is a valid catalog refnum (use catalogRef to get one)
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* if ow is true a translation of a key coming from catalog is
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* overwritten if you provide a new translation
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*/
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int putNewTranslation(TQString key,TQString tran,int catalog,bool ow=true);
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/*
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@return info about catalog n
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*/
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InfoItem getCatalogInfo(int n);
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/*
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Add an entry to catalogsinfo database and
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@return a refnum for the new added item
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*/
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int addCatalogInfo(InfoItem *catInfo,int);
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/*
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Search an Item with the same "location" and
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@return its refnum.
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*/
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int searchCatalogInfo(TQString location);
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/* Get a catalog info for location,
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* if it doesn't exist it will create one.
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* @return the refnum
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*/
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int catalogRef(TQString location,TQString author,TQString path);
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/*
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Put at refnum the catInfo
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@return true if everything is OK
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*/
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bool putCatalogInfo(int refnum, InfoItem *catInfo);
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/*
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Get word info
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*/
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WordItem getWordLocations(TQString word);
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/*
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Add a location for word
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*/
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bool addLocation(TQString word, unsigned int location);
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/*
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Remove location for word
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*/
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bool removeLocation(TQString word, int location);
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/*
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* Rebuild location and word indexes
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*/
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void rebuildIndexes();
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uint32 appendKey(class TQString);
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TQString getKey(uint32 n);
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/*
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Load the catalogs info.
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*/
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void loadInfo();
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void sync();
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bool isOk();
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int count();
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int current();
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void openDataBase();
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void closeDataBase();
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static TQValueList<TQString> wordsIn(TQString string);
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signals:
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void cannotOpenDB(int);
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protected:
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DataBaseItem cursorGet(uint32 flags);
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TQString language;
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TQString basedir;
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TQValueList<InfoItem> info;
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DB *db,*infoDb,*wordDb,*indexDb;
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DBC *cursor;
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bool iAmOk;
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bool indexOk; //Database could word without word index
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};
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#endif
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