remwharead/include/search.hpp

121 lines
3.2 KiB
C++

/* This file is part of remwharead.
* Copyright © 2019 tastytea <tastytea@tastytea.de>
*
* 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, version 3.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef REMWHAREAD_SEARCH_HPP
#define REMWHAREAD_SEARCH_HPP
#include "sqlite.hpp"
#include <list>
#include <string>
#include <vector>
namespace remwharead
{
using std::list;
using std::string;
using std::vector;
/*!
* @brief %Search in database entries.
*
* @since 0.7.0
*
* @headerfile search.hpp remwharead/search.hpp
*/
class Search
{
public:
/*!
* @brief Defines the entries to search.
*
* @since 0.7.0
*/
explicit Search(list<Database::entry> entries);
/*!
* @brief %Search in tags of database entries.
*
* Only matches whole tags, *Pill* does not match *Pillow*.
*
* @param expression %Search expression.
* @param is_re Is it a regular expression?
*
* @return List of matching Database::entry.
*
* @since 0.7.0
*/
list<Database::entry> search_tags(const string &expression, bool is_re)
const;
/*!
* @brief %Search in full text of database entries.
*
* Searches in tags, title, description and full text.
*
* @param expression %Search expression.
* @param is_re Is it a regular expression?
*
* @return List of matching Database::entry.
*
* @since 0.7.0
*/
list<Database::entry> search_all(const string &expression, bool is_re)
const;
/*!
* @brief Spawn threads of search_all(), if it seems sensible.
*
* Figure out if threads could be useful and spawn a sensible amount of
* them.
*
* @param expression %Search expression.
* @param is_re Is it a regular expression?
*
* @return List of matching Database::entry.
*
* @since 0.7.2
*/
// TODO(tastytea): Think of something more elegant.
list<Database::entry> search_all_threaded(const string &expression,
bool is_re) const;
private:
const list<Database::entry> _entries;
/*!
* @brief Split expression into subexpressions.
*
* First it splits at `OR` or `||`, then it splits the subexpressions
* at `AND` or `&&`. The first vector contains all tags before the
* first `OR`.
*
* @return Vector of `OR`-vectors of `AND`-tags.
*
* @since 0.7.0
*/
vector<vector<string>> parse_expression(const string &expression) const;
/*!
* @brief Convert str to lowercase. Works with unicode.
*
* @since 0.7.0
*/
inline string to_lowercase(const string &str) const;
};
} // namespace remwharead
#endif // REMWHAREAD_SEARCH_HPP