Function handleModify

src/hooks/useDiagram.ts:332–362

(instructions: string)

  };

  const handleModify = async (instructions: string) => {
    if (isExampleRepo(repo)) {
      setError("Example repositories cannot be modified.");
      return;
    }

    setLoading(true);
    setError("");
    setCost("");
    try {
      const storedApiKey = localStorage.getItem("openai_key");

      // Check for API key before proceeding
      if (!storedApiKey) {
        setError(
          "An OpenAI API key is required to generate diagrams. Please provide your API key to continue.",
        );
        setState({ status: "error", error: "API key required" });
        setLoading(false);
        return;
      }

      // Start streaming generation with instructions
      await generateDiagram(instructions);
    } catch (error) {
      console.error("Error modifying diagram:", error);
      setError("Failed to modify diagram. Please try again later.");
    } finally {
      setLoading(false);
    }
  };

  const handleRegenerate = async (instructions: string) => {
    if (isExampleRepo(repo)) {