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/*
* libfud
* Copyright 2024 Dominick Allen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FUD_SQLITE_HPP
#define FUD_SQLITE_HPP
#include <fud_result.hpp>
#include <fud_status.hpp>
#include <fud_string.hpp>
#include <sqlite3.h>
namespace fud {
class SqliteStatement;
// NOLINTNEXTLINE(performance-enum-size)
enum class SqliteOpenMode : int
{
ReadOnly = SQLITE_OPEN_READONLY,
ReadWrite = SQLITE_OPEN_READWRITE,
ReadWriteCreate = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE
};
class SqliteErrorMsg;
class SqliteDb;
using SqliteDbResult = Result<SqliteDb, FudStatus>;
class SqliteDb {
private:
constexpr SqliteDb() = default;
public:
static SqliteDbResult make(const String& name, SqliteOpenMode mode, int extraFlags = 0);
static SqliteDbResult make(StringView name, SqliteOpenMode mode, int extraFlags = 0);
static SqliteDbResult make(const char* cStrName, SqliteOpenMode mode, int extraFlags = 0);
SqliteDb(const SqliteDb&) = delete;
SqliteDb(SqliteDb&& rhs) noexcept;
~SqliteDb();
SqliteDb& operator=(const SqliteDb&) = delete;
SqliteDb& operator=(SqliteDb&& rhs) noexcept;
[[nodiscard]] bool valid() const;
bool revalidate();
Result<SqliteStatement, FudStatus> prepare(const String& sql);
FudStatus exec(
const String& statement,
int (*callback)(void*, int, char**, char**),
void* context);
FudStatus exec(
const String& statement,
int (*callback)(void*, int, char**, char**),
void* context,
SqliteErrorMsg& errorMessage);
template <typename T>
FudStatus bind(SqliteStatement& statement, int index, T value);
FudStatus step(SqliteStatement& statement);
Result<int32_t, FudStatus> columnInt32(SqliteStatement& statement, int index);
Result<int64_t, FudStatus> columnInt64(SqliteStatement& statement, int index);
Result<double, FudStatus> columnDouble(SqliteStatement& statement, int index);
Result<StringView, FudStatus> columnText(SqliteStatement& statement, int index);
[[nodiscard]] constexpr int errorCode() const
{
return m_errorCode;
}
[[nodiscard]] constexpr sqlite3* handle() const
{
return m_dbHandle;
}
private:
static SqliteDbResult finishMake(SqliteOpenMode& mode, int& extraFlags, SqliteDb&& sqlDb);
// private methods
FudStatus initialize();
[[nodiscard]] int open();
// private data members
String m_name{};
bool m_nameValid{false};
sqlite3* m_dbHandle{nullptr};
int m_errorCode{0};
SqliteOpenMode m_mode{};
int m_extraFlags{};
};
class SqliteStatement {
public:
SqliteStatement(const SqliteDb& sqliteDb, const String& input);
SqliteStatement(const SqliteStatement&) = delete;
SqliteStatement(SqliteStatement&& rhs) noexcept;
~SqliteStatement();
SqliteStatement& operator=(const SqliteStatement&) = delete;
SqliteStatement& operator=(SqliteStatement&& rhs) noexcept = delete;
[[nodiscard]] bool valid() const;
sqlite3_stmt* statement();
FudStatus reset();
[[nodiscard]] constexpr int errorCode() const
{
return m_errorCode;
}
constexpr FudStatus status()
{
return m_status;
}
private:
const char* m_tail{nullptr};
FudStatus m_status{FudStatus::ObjectInvalid};
int m_errorCode{0};
sqlite3_stmt* m_preparedStatement{nullptr};
};
class SqliteErrorMsg {
public:
constexpr SqliteErrorMsg() = default;
explicit constexpr SqliteErrorMsg(char* errorMsg) : m_errorMsg{errorMsg}
{
}
SqliteErrorMsg(const SqliteErrorMsg&) = delete;
SqliteErrorMsg(SqliteErrorMsg&& rhs) noexcept;
~SqliteErrorMsg();
SqliteErrorMsg& operator=(const SqliteErrorMsg&) = delete;
SqliteErrorMsg& operator=(SqliteErrorMsg&& rhs) noexcept;
void setMessage(char* newMessage);
[[nodiscard]] const char* message() const
{
return m_errorMsg;
}
private:
char* m_errorMsg{nullptr};
};
template <typename T>
FudStatus SqliteDb::bind(SqliteStatement& statement, int index, T value)
{
static_assert(std::is_same_v<T, int32_t>|| std::is_same_v<T, int64_t> || std::is_same_v<T, double> || std::is_same_v<T, StringView>);
if (index < 0) {
return FudStatus::ArgumentInvalid;
}
if constexpr (std::is_same_v<T, int32_t>) {
m_errorCode = sqlite3_bind_int(statement.statement(), index, value);
} else if constexpr (std::is_same_v<T, int64_t>) {
m_errorCode = sqlite3_bind_int64(statement.statement(), index, value);
} else if constexpr (std::is_same_v<T, double>) {
m_errorCode = sqlite3_bind_double(statement.statement(), index, value);
} else if constexpr (std::is_same_v<T, StringView>) {
if (value.length() > std::numeric_limits<int>::max()) {
return FudStatus::ArgumentInvalid;
}
int stringLength = static_cast<int>(value.length());
m_errorCode = ::sqlite3_bind_text(statement.statement(), index, value.c_str(), stringLength, nullptr);
} else {
return FudStatus::Failure;
}
if (m_errorCode != SQLITE_OK) {
return FudStatus::Failure;
}
return FudStatus::Success;
}
} // namespace fud
#endif
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