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/*
* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
* Copyright (c) 2021, Mahmoud Mandour <ma.mandourr@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DeprecatedString.h>
#include <AK/RefPtr.h>
#include <LibCore/Object.h>
#include <LibSQL/Forward.h>
#include <LibSQL/Heap.h>
#include <LibSQL/Meta.h>
#include <LibSQL/Result.h>
#include <LibSQL/Serializer.h>
namespace SQL {
/**
* A Database object logically connects a Heap with the SQL data we want
* to store in it. It has BTree pointers for B-Trees holding the definitions
* of tables, columns, indexes, and other SQL objects.
*/
class Database : public Core::Object {
C_OBJECT(Database);
public:
~Database() override;
ResultOr<void> open();
bool is_open() const { return m_open; }
ErrorOr<void> commit();
ResultOr<void> add_schema(SchemaDef const&);
static Key get_schema_key(DeprecatedString const&);
ResultOr<NonnullRefPtr<SchemaDef>> get_schema(DeprecatedString const&);
ResultOr<void> add_table(TableDef& table);
static Key get_table_key(DeprecatedString const&, DeprecatedString const&);
ResultOr<NonnullRefPtr<TableDef>> get_table(DeprecatedString const&, DeprecatedString const&);
ErrorOr<Vector<Row>> select_all(TableDef&);
ErrorOr<Vector<Row>> match(TableDef&, Key const&);
ErrorOr<void> insert(Row&);
ErrorOr<void> remove(Row&);
ErrorOr<void> update(Row&);
private:
explicit Database(DeprecatedString);
bool m_open { false };
NonnullRefPtr<Heap> m_heap;
Serializer m_serializer;
RefPtr<BTree> m_schemas;
RefPtr<BTree> m_tables;
RefPtr<BTree> m_table_columns;
HashMap<u32, NonnullRefPtr<SchemaDef>> m_schema_cache;
HashMap<u32, NonnullRefPtr<TableDef>> m_table_cache;
};
}
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