Roam: Discourse Context Overlay - remove queue and arbitrary delay

[mdroidian]

Summary by CodeRabbit

• Refactor
  • Streamlined the retrieval and display of contextual overlay information for a smoother, more reliable experience.
  • Enhanced performance by fetching necessary data concurrently and ensuring default content displays seamlessly in case of issues.

[linear]

ENG-223 remove queue and arbitrary delay

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
discourse-graph	⬜️ Skipped (Inspect)			Apr 12, 2025 10:27pm

[coderabbitai]

📝 Walkthrough

Walkthrough

This pull request refactors the DiscourseContextOverlay component in the Roam application. The primary modification involves the getOverlayInfo function, which now uses async/await syntax instead of a promise-based approach. The cache mechanism was updated to use a tag key instead of title, and the redundant overlayQueue mechanism has been removed. Additionally, the id parameter was eliminated from the function signature, and UI refresh functions were removed. Error handling has been enhanced to log issues and return default values on failure.

Changes

File(s)	Change Summary
apps/roam/src/components/DiscourseContextOverlay.tsx	- Refactored getOverlayInfo to use async/await and removed the redundant id parameter. - Updated cache to use tag as the key instead of title. - Removed the overlayQueue mechanism and UI refresh functionalities (refreshUi, refreshAllUi). - Added error handling to return defaults on failure and log errors.

Sequence Diagram(s)

sequenceDiagram
    participant UI as UI Component
    participant Overlay as getOverlayInfo()
    participant Cache as Cache Storage
    participant Context as Discourse Context Fetcher
    participant Backend as Backend Reference Query

    UI->>Overlay: Call getOverlayInfo(tag)
    Overlay->>Cache: Check if data exists for tag
    alt Data exists
        Cache-->>Overlay: Return cached data
    else Data not found
        Overlay->>Context: Fetch discourse context (async)
        Overlay->>Backend: Query backend for references (async)
        Note over Context,Backend: Operations run concurrently via Promise.all
        Context-->>Overlay: Return context results
        Backend-->>Overlay: Return reference data
        Overlay->>Cache: Cache retrieved data using tag
    end
    Overlay-->>UI: Return final discourse data

Loading

Poem

I'm a bunny, hopping through your code,
Skipping queues in a joyful mode.
I watch async calls dance in the light,
Caching data by tag, oh what a sight!
With errors logged so neat and bold,
Your refactor tale is cheerfully told.
🐰 Happy hops in every line!

Tip

⚡💬 Agentic Chat (Pro Plan, General Availability)

• We're introducing multi-step agentic chat in review comments and issue comments, within and outside of PR's. This feature enhances review and issue discussions with the CodeRabbit agentic chat by enabling advanced interactions, including the ability to create pull requests directly from comments and add commits to existing pull requests.

✨ Finishing Touches

• 📝 Generate Docstrings

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

• Review comments: Directly reply to a review comment made by CodeRabbit. Example:
  • I pushed a fix in commit <commit_id>, please review it.
  • Generate unit testing code for this file.
  • Open a follow-up GitHub issue for this discussion.
• Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
  • @coderabbitai generate unit testing code for this file.
  • @coderabbitai modularize this function.
• PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
  • @coderabbitai read src/utils.ts and generate unit testing code.
  • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.
  • @coderabbitai help me debug CodeRabbit configuration file.

Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments.

CodeRabbit Commands (Invoked using PR comments)

• @coderabbitai pause to pause the reviews on a PR.
• @coderabbitai resume to resume the paused reviews.
• @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
• @coderabbitai full review to do a full review from scratch and review all the files again.
• @coderabbitai summary to regenerate the summary of the PR.
• @coderabbitai generate docstrings to generate docstrings for this PR.
• @coderabbitai resolve resolve all the CodeRabbit review comments.
• @coderabbitai plan to trigger planning for file edits and PR creation.
• @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
• @coderabbitai help to get help.

Other keywords and placeholders

• Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
• Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
• Add @coderabbitai anywhere in the PR title to generate the title automatically.

CodeRabbit Configuration File (.coderabbit.yaml)

• You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
• Please see the configuration documentation for more information.
• If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json

Documentation and Community

• Visit our Documentation for detailed information on how to use CodeRabbit.
• Join our Discord Community to get help, request features, and share feedback.
• Follow us on X/Twitter for updates and announcements.

[mdroidian]

@coderabbitai full review

[coderabbitai]

✅ Actions performed

Full review triggered.

[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

apps/roam/src/components/DiscourseContextOverlay.tsx (1)

30-50: Consider implementing cache expiration or invalidation

The current implementation caches results indefinitely. Consider adding a cache expiration mechanism or a way to invalidate the cache when data changes.

Example implementation:

const cache: {
  [tag: string]: {
+   timestamp: number;
    data: DiscourseData;
  };
} = {};

const CACHE_TTL = 5 * 60 * 1000; // 5 minutes in milliseconds

const getOverlayInfo = async (tag: string): Promise<DiscourseData> => {
  try {
-   if (cache[tag]) return cache[tag];
+   const cachedItem = cache[tag];
+   if (cachedItem && (Date.now() - cachedItem.timestamp) < CACHE_TTL) {
+     return cachedItem.data;
+   }

    const relations = getDiscourseRelations();
    const nodes = getDiscourseNodes(relations);

    const [results, refs] = await Promise.all([
      // ... existing code
    ]);

-   return (cache[tag] = {
-     results,
-     refs: refs.length,
-   });
+   const data = {
+     results,
+     refs: refs.length,
+   };
+   
+   cache[tag] = {
+     timestamp: Date.now(),
+     data
+   };
+   
+   return data;
  }

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 60c32b9 and ca2882f.

📒 Files selected for processing (1)

• apps/roam/src/components/DiscourseContextOverlay.tsx (2 hunks)

🔇 Additional comments (4)

apps/roam/src/components/DiscourseContextOverlay.tsx (4)

24-26: Good rename from 'title' to 'tag' for improved semantic clarity

The change in the cache object key from title to tag better represents what's actually being stored, making the code more self-documenting.

---

28-58: Excellent refactoring of getOverlayInfo with several improvements

The function has been significantly improved by:

1. Converting from promise-based to async/await syntax for better readability
2. Adding robust error handling with helpful error messages
3. Removing the overlayQueue mechanism to simplify flow
4. Using Promise.all to run operations in parallel
5. Providing sensible default values when errors occur

This refactoring makes the code more maintainable and resilient.

---

67-69: Updated to use simplified getOverlayInfo signature

Function call correctly updated to match the new signature that no longer requires the id parameter.

---

60-133: Verify all error handling paths in DiscourseContextOverlay component

While the error handling in getOverlayInfo is excellent, the component itself should handle potential errors from getInfo. Currently, if getOverlayInfo returns the default empty values due to an error, the component will continue processing as if everything is fine.

Consider adding additional error handling in the component:

      getOverlayInfo(tag)
        .then(({ refs, results }) => {
          const discourseNode = findDiscourseNode(tagUid);
          if (discourseNode) {
            const attribute = getSettingValueFromTree({
              tree: getBasicTreeByParentUid(discourseNode.type),
              key: "Overlay",
              defaultValue: "Overlay",
            });
            return deriveDiscourseNodeAttribute({
              uid: tagUid,
              attribute,
            }).then((score) => {
              setResults(results);
              setRefs(refs);
              setScore(score);
            });
+         } else {
+           setResults(results);
+           setRefs(refs);
+           // Set a default score or error indicator
+           setScore('N/A');
          }
        })
+       .catch(error => {
+         console.error(`Error in DiscourseContextOverlay for ${tag}:`, error);
+         setResults([]);
+         setRefs(0);
+         setScore('Error');
+       })
        .finally(() => setLoading(false)),