remwharead/include/search.hpp
tastytea aa622e7cc9
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Moved threading into library.
2019-08-09 00:42:27 +02:00

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/* 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 <list>
#include <string>
#include <vector>
#include "sqlite.hpp"
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(const 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
*/
const list<Database::entry> search_tags(string expression,
const 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
*/
const list<Database::entry> search_all(string expression,
const 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: Think of something more elegant.
const list<Database::entry> search_all_threaded(string expression,
const 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
*/
const vector<vector<string>> parse_expression(string expression) const;
/*!
* @brief Convert str to lowercase. Works with unicode.
*
* @since 0.7.0
*/
inline const string to_lowercase(const string &str) const;
};
}
#endif // REMWHAREAD_SEARCH_HPP