#ifndef _DB_H_INCLUDED_
#define _DB_H_INCLUDED_
/* @(#$Id: rcldb.h,v 1.17 2005-11-14 09:56:49 dockes Exp $ (C) 2004 J.F.Dockes */
#include <string>
#include <list>
#include <vector>
#ifndef NO_NAMESPACES
using std::string;
using std::list;
using std::vector;
#endif
// rcldb defines an interface for a 'real' text database. The current
// implementation uses xapian only, and xapian-related code is in rcldb.cpp
// If support was added for other backend, the xapian code would be moved in
// rclxapian.cpp, another file would be created for the new backend, and the
// configuration/compile/link code would be adjusted to allow choosing. There
// is no plan for supporting multiple different backends.
//
// In no case does this try to implement a useful virtualized text-db interface
// The main goal is simplicity and good matching to usage inside the recoll
// user interface. In other words, this is not exhaustive or well-designed or
// reusable.
struct stat;
#ifndef NO_NAMESPACES
namespace Rcl {
#endif
/**
* Dumb bunch holder for document attributes and data
*/
class Doc {
public:
// These fields potentially go into the document data record
string url;
string ipath;
string mimetype;
string fmtime; // File modification time as decimal ascii unix time
string dmtime; // Data reference date (same format). Ie: mail date
string origcharset;
string title;
string keywords;
string abstract;
string text;
void erase() {
url.erase();
ipath.erase();
mimetype.erase();
fmtime.erase();
dmtime.erase();
origcharset.erase();
title.erase();
keywords.erase();
abstract.erase();
text.erase();
}
};
/**
* Holder for the advanced query data
*/
class AdvSearchData {
public:
string allwords;
string phrase;
string orwords;
string nowords;
list<string> filetypes; // restrict to types. Empty if inactive
string topdir; // restrict to subtree. Empty if inactive
void erase() {
allwords.erase();phrase.erase();orwords.erase();nowords.erase();
filetypes.clear(); topdir.erase();
}
};
class DbPops;
/**
* Wrapper class for the native database.
*/
class Db {
AdvSearchData asdata;
vector<int> dbindices; // In case there is a postq filter: sequence of
// db indices that match
void *pdata; // Pointer to private data. We don't want db(ie
// xapian)-specific defs to show in here
public:
Db();
~Db();
enum OpenMode {DbRO, DbUpd, DbTrunc};
bool open(const string &dbdir, OpenMode mode);
bool close();
bool isopen();
// Update-related functions
bool add(const string &filename, const Doc &doc);
bool needUpdate(const string &filename, const struct stat *stp);
bool purge();
bool createStemDb(const string &lang);
// Query-related functions
// Parse query string and initialize query
enum QueryOpts {QO_NONE=0, QO_STEM = 1};
bool setQuery(const string &q, QueryOpts opts = QO_NONE,
const string& stemlang = "english");
bool setQuery(AdvSearchData &q, QueryOpts opts = QO_NONE,
const string& stemlang = "english");
bool getQueryTerms(list<string>& terms);
// Get document at rank i. This is probably vastly inferior to the type
// of interface in Xapian, but we have to start with something simple
// to experiment with the GUI. i is sequential from 0 to some value
bool getDoc(int i, Doc &doc, int *percent = 0);
// Get results count
int getResCnt();
friend class Rcl::DbPops;
private:
/* Copyconst and assignemt private and forbidden */
Db(const Db &) {}
Db & operator=(const Db &) {return *this;};
};
// Unaccent and lowercase data.
extern bool dumb_string(const string &in, string &out);
#ifndef NO_NAMESPACES
}
#endif // NO_NAMESPACES
#endif /* _DB_H_INCLUDED_ */