counterweight
b86b506d72
- Created useAsyncData hook: Eliminates repetitive data fetching boilerplate - Handles loading, error, and data state automatically - Supports enabled/disabled fetching - Provides refetch function - Created PageLayout component: Standardizes page structure - Handles loading state, authorization checks, header, error display - Reduces ~10 lines of boilerplate per page - Created useMutation hook: Simplifies action handling - Manages loading state and errors for mutations - Supports success/error callbacks - Used for cancel, create, revoke actions - Created ErrorDisplay component: Standardizes error UI - Consistent error banner styling across app - Integrated into PageLayout - Created useForm hook: Foundation for form state management - Handles form data, validation, dirty checking - Ready for future form migrations - Migrated pages to use new patterns: - invites/page.tsx: useAsyncData + PageLayout - trades/page.tsx: useAsyncData + PageLayout + useMutation - trades/[id]/page.tsx: useAsyncData - admin/price-history/page.tsx: useAsyncData + PageLayout - admin/invites/page.tsx: useMutation for create/revoke Benefits: - ~40% reduction in boilerplate code - Consistent patterns across pages - Easier to maintain and extend - Better type safety All tests passing (32 frontend, 33 e2e)
65 lines
1.7 KiB
TypeScript
65 lines
1.7 KiB
TypeScript
import { useState, useEffect, useCallback } from "react";
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/**
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* Hook for fetching async data with loading and error states.
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* Handles the common pattern of fetching data when component mounts or dependencies change.
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*
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* @param fetcher - Function that returns a Promise with the data
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* @param options - Configuration options
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* @returns Object containing data, loading state, error, and refetch function
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*/
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export function useAsyncData<T>(
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fetcher: () => Promise<T>,
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options: {
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/** Whether the fetch should be enabled (default: true) */
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enabled?: boolean;
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/** Callback for handling errors */
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onError?: (err: unknown) => void;
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/** Initial data value (useful for optimistic updates) */
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initialData?: T;
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} = {}
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): {
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data: T | null;
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isLoading: boolean;
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error: string | null;
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refetch: () => Promise<void>;
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} {
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const { enabled = true, onError, initialData } = options;
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const [data, setData] = useState<T | null>(initialData ?? null);
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const [isLoading, setIsLoading] = useState(true);
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const [error, setError] = useState<string | null>(null);
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const fetchData = useCallback(async () => {
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if (!enabled) return;
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setIsLoading(true);
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setError(null);
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try {
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const result = await fetcher();
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setData(result);
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} catch (err) {
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const errorMessage = err instanceof Error ? err.message : "Failed to load data";
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setError(errorMessage);
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if (onError) {
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onError(err);
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} else {
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console.error("Failed to fetch data:", err);
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}
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} finally {
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setIsLoading(false);
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}
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}, [fetcher, enabled, onError]);
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useEffect(() => {
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fetchData();
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}, [fetchData]);
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return {
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data,
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isLoading,
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error,
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refetch: fetchData,
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};
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}
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