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/*
* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#include "database.hpp"
#include <string.h>
#include <sstream>
namespace usdx
{
log4cxx::LoggerPtr Database::log = log4cxx::Logger::getLogger("usdx.base.Database");
Database::Database(const std::string filename)
{
if (SQLITE_OK != sqlite3_open_v2(filename.c_str(), &this->database, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL)) {
sqlite3_close(database);
throw "Error opening database.";
}
}
Database::~Database(void)
{
/* frees database */
LOG4CXX_DEBUG(log, "Closing Database");
sqlite3_close(database);
database = NULL;
}
sqlite3_stmt *Database::sqlite_prepare(const std::wstring sqlStatement)
{
sqlite3_stmt *sqliteStatement;
if (SQLITE_OK != sqlite3_prepare16_v2(database, sqlStatement.c_str(), sqlStatement.length(), &sqliteStatement, NULL)) {
sqlite3_finalize(sqliteStatement);
LOG4CXX_ERROR(log, L"Error '" << sqlite3_errmsg(database) << L"' in SQL '" << sqlStatement << L"'");
throw "Error preparing statement.";
}
return sqliteStatement;
}
void Database::sqlite_exec(const std::wstring sqlStatement)
{
sqlite3_stmt *sqliteStatement = sqlite_prepare(sqlStatement);
sqlite3_step(sqliteStatement);
sqlite3_finalize(sqliteStatement);
}
const bool Database::sqlite_table_exists(const std::wstring table)
{
std::wstring sql = L"select [name] from [sqlite_master] where [type] = 'table' and [tbl_name] = ?1;";
sqlite3_stmt *sqliteStatement = sqlite_prepare(sql);
// bind table name to parameter 1 and execute statement
sqlite3_bind_text16(sqliteStatement, 1, table.c_str(), table.length(), SQLITE_TRANSIENT);
int rc = sqlite3_step(sqliteStatement);
// if rc is SQLITE_ROW, than result has at lease one row and so
// the table exists
bool result = false;
if (rc == SQLITE_ROW) {
result = true;
}
sqlite3_finalize(sqliteStatement);
return result;
}
const bool Database::sqlite_table_contains_column(const std::wstring table, const std::wstring column)
{
sqlite3_stmt *sqliteStatement = sqlite_prepare(L"PRAGMA TABLE_INFO([" + table + L"]);");
bool result = false;
int rc = sqlite3_step(sqliteStatement);
while (rc == SQLITE_ROW) {
const wchar_t *column_name = (const wchar_t*)sqlite3_column_blob(sqliteStatement, 1);
if (column == std::wstring(column_name)) {
result = true;
break;
}
rc = sqlite3_step(sqliteStatement);
}
sqlite3_finalize(sqliteStatement);
return result;
}
const int Database::get_version(void)
{
int result = -1;
sqlite3_stmt *sqliteStatement = sqlite_prepare(L"PRAGMA user_version;");
int rc = sqlite3_step(sqliteStatement);
if (rc == SQLITE_ROW) {
result = sqlite3_column_int(sqliteStatement, 0);
}
sqlite3_finalize(sqliteStatement);
return result;
}
void Database::set_version(const int version)
{
// format the PRAGMA statement (PRAGMA does _not_ support parameters)
std::wostringstream sqlStatementBuffer (std::wostringstream::out);
sqlStatementBuffer << L"PRAGMA user_version = " << version << L";";
sqlite_exec(sqlStatementBuffer.str());
}
};
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