FMDatabase* databaseConnection(BOOL open)
{
	static FMDatabase *connection = nil;

	if(!open)
	{
		if(connection)
		{
			[connection close];
			[connection release];
			connection = nil;
		}
		return nil;
	}

	if(connection)
	{
		return connection;
	}

	NSString *storePath = [applicationDocumentsDirectory() stringByAppendingPathComponent:@"Data.db"];
	NSFileManager *fileManager = [NSFileManager defaultManager];
	// If the expected store doesn't exist, copy the default store.
	if (![fileManager fileExistsAtPath:storePath])
	{
		NSLog(@"Data.db file not exists: copying the default one.");
		NSString *defaultStorePath = [[NSBundle mainBundle] pathForResource:@"Data" ofType:@"db"];
		if (defaultStorePath)
		{
			[fileManager copyItemAtPath:defaultStorePath toPath:storePath error:NULL];
		}
	}

	connection = [[FMDatabase databaseWithPath:storePath] retain];
	[connection open];
	return connection;
}

NSString* applicationDocumentsDirectory()
{
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
	return basePath;
}