126 lines
3.3 KiB
C++
126 lines
3.3 KiB
C++
/* This file is part of remwharead.
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* Copyright © 2019 tastytea <tastytea@tastytea.de>
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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, version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef REMWHAREAD_SEARCH_HPP
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#define REMWHAREAD_SEARCH_HPP
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#include "sqlite.hpp"
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#include <list>
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#include <string>
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#include <vector>
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namespace remwharead
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{
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using std::list;
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using std::string;
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using std::vector;
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/*!
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* @brief %Search in database entries.
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*
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* @since 0.7.0
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*
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* @headerfile search.hpp remwharead/search.hpp
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*/
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class Search
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{
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public:
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/*!
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* @brief Defines the entries to search.
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*
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* @since 0.7.0
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*/
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explicit Search(list<Database::entry> entries);
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/*!
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* @brief %Search in tags of database entries.
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*
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* Only matches whole tags, *Pill* does not match *Pillow*.
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*
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* @param expression %Search expression.
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* @param is_re Is it a regular expression?
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*
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* @return List of matching Database::entry.
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*
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* @since 0.7.0
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*/
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[[nodiscard]]
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list<Database::entry> search_tags(const string &expression, bool is_re)
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const;
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/*!
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* @brief %Search in full text of database entries.
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*
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* Searches in tags, title, description and full text.
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*
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* @param expression %Search expression.
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* @param is_re Is it a regular expression?
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*
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* @return List of matching Database::entry.
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*
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* @since 0.7.0
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*/
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[[nodiscard]]
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list<Database::entry> search_all(const string &expression, bool is_re)
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const;
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/*!
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* @brief Spawn threads of search_all(), if it seems sensible.
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*
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* Figure out if threads could be useful and spawn a sensible amount of
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* them.
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*
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* @param expression %Search expression.
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* @param is_re Is it a regular expression?
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*
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* @return List of matching Database::entry.
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*
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* @since 0.7.2
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*/
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// TODO(tastytea): Think of something more elegant.
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[[nodiscard]]
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list<Database::entry> search_all_threaded(const string &expression,
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bool is_re) const;
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private:
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const list<Database::entry> _entries;
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/*!
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* @brief Split expression into subexpressions.
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*
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* First it splits at `OR` or `||`, then it splits the subexpressions
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* at `AND` or `&&`. The first vector contains all tags before the
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* first `OR`.
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*
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* @return Vector of `OR`-vectors of `AND`-tags.
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*
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* @since 0.7.0
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*/
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[[nodiscard]]
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static vector<vector<string>> parse_expression(const string &expression);
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/*!
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* @brief Convert str to lowercase. Works with unicode.
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*
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* @since 0.7.0
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*/
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[[nodiscard]]
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static inline string to_lowercase(const string &str);
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};
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} // namespace remwharead
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#endif // REMWHAREAD_SEARCH_HPP
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