CREATE OR REPLACE FUNCTION public.insert_url(in_url text) RETURNS text
	LANGUAGE plpgsql STRICT
	AS $$
DECLARE
	ret_value integer;
	temp_folder_path text;
BEGIN
	PERFORM * FROM artist_website aw
	WHERE aw.url = in_url;

    IF FOUND THEN
		RAISE EXCEPTION 'url already exists';
    END IF;

	INSERT INTO artist_website (url) VALUES (in_url);
	
	SELECT * INTO ret_value FROM set_artist_name(in_url);
	IF ret_value <> 0 THEN
		DELETE FROM artist_website WHERE url = in_url;
		RAISE EXCEPTION 'could not set artist_name';
	END IF;
	
	SELECT * INTO ret_value FROM set_website_name(in_url);
	IF ret_value <> 0 THEN
		DELETE FROM artist_website WHERE url = in_url;
		RAISE EXCEPTION 'could not set website_name';
	END IF;
	
	SELECT * INTO ret_value FROM set_folder_path(in_url);
	IF ret_value <> 0 THEN
		DELETE FROM artist_website WHERE url = in_url;
		RAISE EXCEPTION 'could not set folder_path';
	END IF;

	SELECT folder_path INTO temp_folder_path FROM artist_website WHERE url ILIKE in_url;
	
	RETURN concat(in_url, ' # ', temp_folder_path);
END;
$$;