feat: add AI-powered Mermaid diagram fixer #7514
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- Add Fix Diagram button to MermaidBlock component when rendering errors occur - Create MermaidDiagramFixer service using Google Gemini AI - Implement 4-stage fixing approach: JSON generation, validation, Python code generation, and execution - Add message handlers for webview-extension communication - Add comprehensive tests for the new functionality - Update translations for new UI elements Fixes #7513
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| } catch (err) { | ||
| console.error("Error fixing diagram:", err) | ||
| } finally { | ||
| setIsFixing(false) |
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In handleFixDiagram, the finally block sets isFixing to false immediately after posting the fix request. This may prematurely remove the loading indicator before the response is received. Consider removing or adjusting the setIsFixing(false) call so that the state is only updated when the fix response is handled.
| setIsFixing(false) |
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| Response:` | ||
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| try { | ||
| const model = this.client!.models.generateContent({ |
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Is this intentional? The GoogleGenAI client is not nullable based on the constructor logic (line 96), so the non-null assertion operator (!) seems unnecessary here. The existing codebase pattern in src/api/providers/gemini.ts doesn't use this pattern.
| private modelName: string | ||
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| constructor(private options: MermaidFixerOptions = {}) { | ||
| this.modelName = options.geminiModel || "gemini-2.0-flash-exp" |
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The default model 'gemini-2.0-flash-exp' is hardcoded here. Could we consider making this configurable or importing from a constants file? The existing gemini.ts provider uses constants from the types package for model definitions.
| const cleanedMermaid = this.postProcessMermaid(fixedMermaid) | ||
| return cleanedMermaid | ||
| } catch (error) { | ||
| console.error("Error fixing Mermaid diagram:", error) |
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The error handling here is quite generic. Could we improve this to handle specific Gemini API errors? For example:
- Rate limiting (429 status)
- Invalid API key (401/403)
- Quota exceeded
- Model not available
This would provide better user feedback about what went wrong.
| // Create fixer instance with Gemini API key | ||
| const fixer = new MermaidDiagramFixer({ | ||
| geminiApiKey: apiConfiguration.geminiApiKey, | ||
| geminiModel: apiConfiguration.apiModelId, |
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Using apiConfiguration.apiModelId for the Gemini model might cause confusion since this field is meant for the main chat model. Consider using a dedicated field like 'geminiModelId' or 'geminiApiModelId' to avoid conflicts when users have different models configured for chat vs. diagram fixing.
| await expect(fixer.fixDiagram("invalid diagram", "error")).rejects.toThrow("Failed to fix Mermaid diagram") | ||
| }) | ||
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| it("should successfully process a valid response", async () => { |
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The PR description mentions '2 failures due to mock setup complexity, but core functionality works'. These test failures should be fixed before merging. Failing tests, especially for external API integrations, could hide real issues. Could we either fix the mock setup or mark these tests as skipped with a clear TODO?
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| window.addEventListener("message", handleMessage) | ||
| return () => window.removeEventListener("message", handleMessage) |
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Good implementation of the message listener! However, could we add a cleanup in case the component unmounts while a fix is in progress? Consider resetting the isFixing state in the cleanup function.
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Closing in favor of #5304 |
Fixes #7513
Summary
This PR implements an AI-powered Mermaid diagram fixer that automatically corrects syntax errors in Mermaid diagrams using Google Gemini AI.
Changes
How it works
Testing
Requirements
Screenshots
The "Fix Diagram" button appears when a Mermaid diagram has syntax errors and can be clicked to automatically fix the diagram using AI.
Important
Introduces AI-powered Mermaid diagram fixer using Google Gemini AI, adding a "Fix Diagram" button, message handling, and tests for various diagram types.
MermaidBlockcomponent for syntax errors.MermaidDiagramFixerservice using Google Gemini AI.common.json.webviewMessageHandler.tsfor fixing diagrams.ExtensionMessage.tsandWebviewMessage.tsto include new message types.MermaidDiagramFixer.spec.tsfor various diagram types and error cases.This description was created by
for 8f73e14. You can customize this summary. It will automatically update as commits are pushed.