table.h

#ifndef DATABASE_TABLE_H
#define DATABASE_TABLE_H
 
#include <vkdb/concepts.h>
#include <vkdb/lsm_tree.h>
#include <vkdb/friendly_builder.h>
#include <fstream>
 
namespace vkdb {
static const FilePath TAG_COLUMNS_FILENAME{"tag_columns.metadata"};
 
using DatabaseName = std::string;
 
using TableName = std::string;
 
class Table {
public:
    Table() = delete;
    
    explicit Table(const FilePath& db_path, const TableName& name);
    
    Table(Table&&) noexcept = default;
 
    Table& operator=(Table&&) noexcept = default;
    
    Table(const Table&) = delete;
 
    Table& operator=(const Table&) = delete;
    
    ~Table() noexcept = default;
    
    Table& setTagColumns(const TagColumns& tag_columns) noexcept;
 
    Table& addTagColumn(const TagKey& tag_column);
 
    Table& removeTagColumn(const TagKey& tag_column);
 
    void clear() const noexcept;
    
    [[nodiscard]] FriendlyQueryBuilder<double> query() noexcept;
 
    [[nodiscard]] TableName name() const noexcept;
 
    [[nodiscard]] TagColumns tagColumns() const noexcept;
 
    [[nodiscard]] FilePath path() const noexcept;
 
private:
    using StorageEngine = LSMTree<double>;
 
    [[nodiscard]] bool been_populated() const noexcept;
    
    void save_tag_columns() const;
 
    void load_tag_columns();
 
    [[nodiscard]] FilePath tag_columns_path() const noexcept;
    
    void load();
    
    DatabaseName db_path_;
 
    TableName name_;
 
    TagColumns tag_columns_;
 
    StorageEngine storage_engine_;
};
 
} // namespace vkdb
 
#endif // DATABASE_TABLE_H