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#pragma once
#include <database/statement.hpp>
#include <database/column.hpp>
#include <database/query.hpp>
#include <logger/logger.hpp>
#include <type_traits>
#include <vector>
#include <string>
#include <tuple>
#include <sqlite3.h>
template <int N, typename ColumnType, typename... T>
typename std::enable_if<!std::is_same<std::decay_t<ColumnType>, Id>::value, void>::type
actual_bind(Statement& statement, std::vector<std::string>& params, const std::tuple<T...>&)
{
const auto value = params.front();
params.erase(params.begin());
if (sqlite3_bind_text(statement.get(), N + 1, value.data(), static_cast<int>(value.size()), SQLITE_TRANSIENT) != SQLITE_OK)
log_error("Failed to bind ", value, " to param ", N);
}
template <int N, typename ColumnType, typename... T>
typename std::enable_if<std::is_same<std::decay_t<ColumnType>, Id>::value, void>::type
actual_bind(Statement& statement, std::vector<std::string>&, const std::tuple<T...>& columns)
{
auto&& column = std::get<Id>(columns);
if (column.value != 0)
{
if (sqlite3_bind_int64(statement.get(), N + 1, static_cast<sqlite3_int64>(column.value)) != SQLITE_OK)
log_error("Failed to bind ", column.value, " to id.");
}
else if (sqlite3_bind_null(statement.get(), N + 1) != SQLITE_OK)
log_error("Failed to bind NULL to param ", N);
}
struct InsertQuery: public Query
{
InsertQuery(const std::string& name):
Query("INSERT OR REPLACE INTO ")
{
this->body += name;
}
template <typename... T>
void execute(const std::tuple<T...>& columns, sqlite3* db)
{
auto statement = this->prepare(db);
{
this->bind_param(columns, statement);
if (sqlite3_step(statement.get()) != SQLITE_DONE)
log_error("Failed to execute query: ", sqlite3_errmsg(db));
}
}
template <int N=0, typename... T>
typename std::enable_if<N < sizeof...(T), void>::type
bind_param(const std::tuple<T...>& columns, Statement& statement)
{
using ColumnType = typename std::remove_reference<decltype(std::get<N>(columns))>::type;
actual_bind<N, ColumnType>(statement, this->params, columns);
this->bind_param<N+1>(columns, statement);
}
template <int N=0, typename... T>
typename std::enable_if<N == sizeof...(T), void>::type
bind_param(const std::tuple<T...>&, Statement&)
{}
template <typename... T>
void insert_values(const std::tuple<T...>& columns)
{
this->body += "VALUES (";
this->insert_value(columns);
this->body += ")";
}
template <int N=0, typename... T>
typename std::enable_if<N < sizeof...(T), void>::type
insert_value(const std::tuple<T...>& columns)
{
this->body += "?";
if (N != sizeof...(T) - 1)
this->body += ",";
this->body += " ";
add_param(*this, std::get<N>(columns));
this->insert_value<N+1>(columns);
}
template <int N=0, typename... T>
typename std::enable_if<N == sizeof...(T), void>::type
insert_value(const std::tuple<T...>&)
{ }
template <typename... T>
void insert_col_names(const std::tuple<T...>& columns)
{
this->body += " (";
this->insert_col_name(columns);
this->body += ")\n";
}
template <int N=0, typename... T>
typename std::enable_if<N < sizeof...(T), void>::type
insert_col_name(const std::tuple<T...>& columns)
{
using ColumnType = typename std::remove_reference<decltype(std::get<N>(columns))>::type;
this->body += ColumnType::name;
if (N < (sizeof...(T) - 1))
this->body += ", ";
this->insert_col_name<N+1>(columns);
}
template <int N=0, typename... T>
typename std::enable_if<N == sizeof...(T), void>::type
insert_col_name(const std::tuple<T...>&)
{}
private:
};
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