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#include "../../include/odhtdb/sql/SqlQuery.hpp"
#include <sqlite3.h>
namespace odhtdb
{
SqlQuery::SqlQuery(sqlite3 *_db, const char *sql, std::initializer_list<SqlArg> args) :
db(_db),
stmt(nullptr),
numColumns(0)
{
int rc = sqlite3_prepare_v2(db, sql, -1, &stmt, nullptr);
if(rc != SQLITE_OK)
{
std::string errMsg = "Failed to prepare sqlite statement, error: ";
errMsg += sqlite3_errmsg(db);
throw SqlQueryException(errMsg);
}
int numParams = sqlite3_bind_parameter_count(stmt);
if(args.size() != numParams)
{
std::string errMsg = "Failed to prepare sqlite statement, error: Sql has ";
errMsg += std::to_string(numParams);
errMsg += " parameters, got ";
errMsg += std::to_string(args.size());
errMsg += " arguments";
sqlite3_finalize(stmt);
stmt = nullptr;
throw SqlQueryException(errMsg);
}
int paramIndex = 1;
for(const SqlArg &arg : args)
{
rc = arg.bind(stmt, paramIndex);
if(rc != SQLITE_OK)
{
std::string errMsg = "Failed to bind param, error code: ";
errMsg += std::to_string(rc);
sqlite3_finalize(stmt);
stmt = nullptr;
throw SqlQueryException(errMsg);
}
++paramIndex;
}
}
SqlQuery::~SqlQuery()
{
sqlite3_finalize(stmt);
}
bool SqlQuery::next()
{
int rc = sqlite3_step(stmt);
if(rc == SQLITE_DONE)
return false;
else if(rc != SQLITE_ROW)
{
std::string errMsg = "Failed to perform sql select, error: ";
errMsg += sqlite3_errmsg(db);
throw SqlQueryException(errMsg);
}
numColumns = sqlite3_data_count(stmt);
return true;
}
void SqlQuery::checkColumnIndex(int index)
{
if(index < 0 || index >= numColumns)
{
std::string errMsg;
if(numColumns == 0)
{
errMsg += "Attempt to get column ";
errMsg += std::to_string(index);
errMsg += " but result does not have any columns";
}
else
{
errMsg += "Column index ";
errMsg += std::to_string(index);
errMsg += " has to be between 0 and ";
errMsg += std::to_string(numColumns - 1);
}
throw SqlQueryException(errMsg);
}
}
int SqlQuery::getInt(int index)
{
checkColumnIndex(index);
return sqlite3_column_int(stmt, index);
}
i64 SqlQuery::getInt64(int index)
{
checkColumnIndex(index);
return sqlite3_column_int64(stmt, index);
}
const DataView SqlQuery::getBlob(int index)
{
checkColumnIndex(index);
const void *data = sqlite3_column_blob(stmt, index);
int size = sqlite3_column_bytes(stmt, index);
return { (void*)data, (usize)size };
}
}
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