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Pull Request #1247

Review complete. See inline suggestions for improvements.

Files Reviewed:

src/services/ApiService.ts

3 hunks

2 suggestions

src/components/DataTable.tsx

2 hunks

1 suggestion

src/hooks/useAsyncData.ts

1 hunk

1 suggestion

src/utils/validation.ts

2 hunks

No issues

src/types/api.types.ts

1 hunk

No issues

src/middleware/errorHandler.ts

1 hunk

1 suggestion

Summary by CodeRyno

Pull Request Analysis

•New Features

Introduced asynchronous data fetching service with TypeScript generics and retry logic for robust API communication.

Added reactive data table component with sorting, filtering, and pagination using modern React patterns.

Implemented custom hook for async data management with loading states and error boundaries.

Enhanced error handling middleware with centralized logging and user-friendly error messages.

•Improvements

Refined API service methods with consistent error handling and improved TypeScript type safety.

Enhanced validation utilities with comprehensive schema definitions and runtime type checking.

Streamlined component architecture with better separation of concerns and reusable patterns.

•Bug Fixes

Fixed memory leak in async data hook by properly cleaning up subscriptions and canceling pending requests.

Resolved race condition in API service where concurrent requests could overwrite each other's responses.

Corrected TypeScript strict null checks violations in data table component filtering logic.

Walkthrough

Detailed Change Analysis

This pull request introduces a comprehensive data management system with asynchronous API services, reactive components, and enhanced error handling. The changes include new TypeScript generics for type-safe data fetching, custom hooks for state management, and improved validation utilities. A new data table component provides sorting and filtering capabilities, while the API service layer implements retry logic and proper error boundaries for robust data operations.

File(s)Change Summary

ApiService.ts

Enhanced with generic types and retry logic for robust async operations with proper error handling.

DataTable.tsx

New reactive component with sorting, filtering, and pagination using TypeScript strict mode.

useAsyncData.ts

Custom hook for async data management with loading states and cleanup logic.

validation.ts

Enhanced validation utilities with comprehensive schema definitions and runtime checking.

api.types.ts

New TypeScript interfaces with strict null checks and generic type parameters.

errorHandler.ts

Centralized error handling middleware with logging and user-friendly error messages.

src/services/ApiService.tsComment on lines 45 to 67

45export class ApiService<T> {

46 private baseUrl: string;

47 private timeout: number;

49- async fetchData(endpoint: string): Promise<T> {

50- const response = await fetch(`$${this.baseUrl}/${endpoint}``);

51- return response.json();

52+ async fetchData(endpoint: string, signal?: AbortSignal): Promise<T> {

53+ const controller = new AbortController();

54+ const timeoutId = setTimeout(() => controller.abort(), this.timeout);

55+

56+ try {

57+ const response = await fetch(`$${this.baseUrl}/${endpoint}``, {

58+ signal: signal || controller.signal

59+ });

60+ if (!response.ok) throw new Error(`HTTP $${response.status}``);

61+ return await response.json();

62+ } finally {

63+ clearTimeout(timeoutId);

64+ }

CriticalMemory LeakHigh Confidence

Missing request cancellation causing memory leaks and race conditions

The fetchData method lacks proper request cancellation and timeout handling, leading to potential memory leaks when components unmount before requests complete. Adding AbortController support and timeout management prevents race conditions and ensures proper cleanup of pending requests.

src/services/ApiService.ts•Service-layer•High Confidence

src/components/DataTable.tsxComment on lines 78 to 95

78const DataTable = <T extends Record<string, any>>(props: Props<T>) => {

79 const [sortConfig, setSortConfig] = useState<SortConfig | null>(null);

80 const [filters, setFilters] = useState<FilterState>('');

82- const filteredData = useMemo(() => {

83- return data.filter(item => {

84- return Object.entries(filters).every(([key, value]) => {

85- return !value || item[key]?.toString().includes(value);

86+ const filteredData = useMemo(() => {

87+ if (!data || data.length === 0) return [];

88+ return data.filter(item => {

89+ return Object.entries(filters).every(([key, value]) => {

90+ if (!value) return true;

91+ const itemValue = item[key as keyof T];

92+ return itemValue != null && itemValue.toString().includes(value);

HighNull SafetyHigh Confidence

Fix TypeScript strict null check violations in filter logic

The filtering logic has potential null/undefined access violations that would fail TypeScript strict mode. Adding proper null checks and type guards ensures runtime safety and prevents crashes when filtering data with missing or null properties.

src/components/DataTable.tsx•Component-local•High Confidence

src/hooks/useAsyncData.tsComment on lines 28 to 45

28export const useAsyncData = <T>(fetcher: () => Promise<T>) => {

29 const [data, setData] = useState<T | null>(null);

30 const [loading, setLoading] = useState(false);

31 const [error, setError] = useState<Error | null>(null);

33- useEffect(() => {

34- setLoading(true);

35- fetcher().then(setData).catch(setError).finally(() => setLoading(false));

36+ useEffect(() => {

37+ const controller = new AbortController();

38+ let isMounted = true;

39+

40+ setLoading(true);

41+ fetcher()

42+ .then(result => isMounted && setData(result))

43+ .catch(err => isMounted && setError(err))

44+ .finally(() => isMounted && setLoading(false));

45+

46+ return () => {

47+ isMounted = false;

48+ controller.abort();

49+ };

PerformanceMemory OptimizationHigh Confidence

Add cleanup logic to prevent memory leaks in async hook

The async data hook lacks proper cleanup when components unmount, potentially causing memory leaks and state updates on unmounted components. Adding isMounted checks and AbortController cleanup ensures safe async operations and prevents React warnings about memory leaks.

src/hooks/useAsyncData.ts•Hook Pattern•High Confidence

Review Complete!

Your code has been thoroughly analyzed

Files Reviewed

Issues Found

Suggestions Made

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The future of AI-powered code reviews

Files Reviewed:

•New Features

•Improvements

•Bug Fixes

Missing request cancellation causing memory leaks and race conditions

Fix TypeScript strict null check violations in filter logic

Add cleanup logic to prevent memory leaks in async hook

Review Complete!

Features in development

Signal over noise

Security & performance checks (early)

Inline suggestions in PRs

What we're working on

Bug Detection

Security Scanning

Performance Analysis

Code Quality

Style Enforcement

Smart Suggestions

Platform Support

GitHub

Azure DevOps

GitLab

Bitbucket

Security-first architecture

Security Architecture in Development

Privacy-first design

Enterprise security

Secure infrastructure

Compliance & Certifications

Security-first approach

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