website/templates/projects/repo_detail.html (3)

410-508: Enhanced Statistics Charts Section with Lazy Loading
The revised HTML segment for the statistics charts cleanly replaces static values with dynamic placeholders and loading spinners. This ensures that users see immediate visual feedback ("Loading...") while the asynchronous data retrieval is in progress. The use of clearly defined IDs (e.g., issue_change_ratio_numbers, pr_change_numbers, commit_change_numbers) facilitates targeted updates once the data is available.

Consider adding ARIA attributes (e.g., aria-busy="true" during loading and aria-busy="false" after updates) to improve accessibility for screen reader users.

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1364-1369: Redundant Open/Closed Issue Ratio Calculation
There is an initial calculation and manual insertion of the open/closed issue ratio (lines 1364–1369) before the dynamic update later in the createCharts function. While initializing the ratio early can be useful, the same value is recalculated when the fetched data arrives. Consider consolidating this logic to a single update point or ensuring that both calculations remain synchronized to avoid any discrepancies between the static initial render and the dynamic update.

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1372-1517: Dynamic Chart Generation and Trend Indicator Updates
The new JavaScript code efficiently implements lazy loading for the statistics charts. Key strengths include:

• Proper Cleanup: The functions check for and destroy existing chart instances before creating new ones, preventing duplicate renders and potential memory leaks.
• Modularity: Separating the chart creation (createCharts(data)), trend indicator updates (updateTrendIndicator(elementId, change, percentage_change)), and data fetching (fetchActivityData()) into distinct functions improves maintainability and readability.
• Dynamic UI Updates: The logic updates the displayed values (e.g., for issues, pull requests, and commits) and provides trend indicators with directional arrows based on the data changes.

A couple of suggestions:

• Improve error handling: While errors are logged to the console and an alert is shown, providing a more user-friendly in-page error notification or status message could enhance the user experience.
• Consider centralizing the open/closed issue ratio update to avoid redundancy with the initial ratio calculation mentioned earlier.

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website/views/project.py (2)

52-61: Implementation of API endpoint to fetch repository activity data.

Good implementation of an API endpoint for fetching repository activity data. This allows the frontend to load the statistics chart asynchronously, which will improve the initial page load time as mentioned in the PR objectives.

Consider adding error handling for malformed repository URLs that might not follow the expected format github.com/owner/repo:

 def repo_activity_data(request, slug):
     """API endpoint for repository activity data"""
     repo = get_object_or_404(Repo, slug=slug)
-    owner_repo = repo.repo_url.rstrip("/").split("github.com/")[-1]
-    owner, repo_name = owner_repo.split("/")
+    try:
+        owner_repo = repo.repo_url.rstrip("/").split("github.com/")[-1]
+        owner, repo_name = owner_repo.split("/")
+    except (IndexError, ValueError):
+        return JsonResponse({"error": "Invalid repository URL format"}, status=400)

     # Get activity data
     activity_data = RepoDetailView().fetch_activity_data(owner, repo_name)

     return JsonResponse(activity_data)

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59-59: Consider refactoring to avoid direct instantiation of a view class.

Creating a new instance of RepoDetailView here is unusual since Django views are typically not designed to be instantiated directly. This approach works because fetch_activity_data doesn't depend on the view's lifecycle, but it creates tight coupling.

Consider extracting the fetch_activity_data logic into a separate utility function or service that can be called from both the view and this API endpoint:

 # Get activity data
-activity_data = RepoDetailView().fetch_activity_data(owner, repo_name)
+from website.utils.github import fetch_repository_activity_data
+activity_data = fetch_repository_activity_data(owner, repo_name)

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Review profile: CHILL
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