Lukas
5166789b68
Introduce discriminated FetchError union type to replace weak string error handling in API calls and hooks. Enables actionable error diagnostics. Changes: - Create types/api.ts with FetchError discriminated union (api_error, network_error, abort_error) - Export type guards: isAuthError, isAbortError, isNetworkError, isApiError - Update useListData and usePolledData to expose typed FetchError instead of string - Add getErrorMessage() helper to extract displayable messages from FetchError - Add createStringErrorAdapter() for backward compatibility with string error state - Update handleFetchError() to work with both FetchError and string setters - Update all consumer hooks to expose typed errors - Update components to use getErrorMessage() when displaying errors - Update tests to mock FetchError instead of strings - Add comprehensive typed error model documentation to Web-Development.md This enables better error handling patterns: - Check error.type to distinguish between API, network, and abort errors - Extract status codes for specific handling (401/403 auth, 50x server errors) - Maintain backward compatibility with existing string-based error states All TypeScript compilation passes with no errors. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
69 lines
1.9 KiB
TypeScript
69 lines
1.9 KiB
TypeScript
/**
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* React hook for loading and updating global configuration.
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*/
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import { useCallback, useEffect, useRef, useState } from "react";
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import { fetchGlobalConfig, updateGlobalConfig } from "../api/config";
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import { handleFetchError, createStringErrorAdapter } from "../utils/fetchError";
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import type { GlobalConfig, GlobalConfigUpdate } from "../types/config";
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export interface UseGlobalConfigResult {
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config: GlobalConfig | null;
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loading: boolean;
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error: string | null;
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refresh: () => void;
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updateConfig: (update: GlobalConfigUpdate) => Promise<void>;
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}
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/**
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* Load global configuration and expose update operations.
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*/
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export function useGlobalConfig(): UseGlobalConfigResult {
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const [config, setConfig] = useState<GlobalConfig | null>(null);
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const [loading, setLoading] = useState(true);
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const [error, setError] = useState<string | null>(null);
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const abortRef = useRef<AbortController | null>(null);
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const load = useCallback((): void => {
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abortRef.current?.abort();
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const ctrl = new AbortController();
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abortRef.current = ctrl;
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setLoading(true);
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setError(null);
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fetchGlobalConfig()
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.then((resp) => {
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if (!ctrl.signal.aborted) {
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setConfig(resp);
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}
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})
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.catch((err: unknown) => {
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if (!ctrl.signal.aborted) {
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handleFetchError(err, createStringErrorAdapter(setError), "Failed to fetch global config");
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}
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})
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.finally(() => {
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if (!ctrl.signal.aborted) {
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setLoading(false);
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}
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});
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}, []);
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useEffect(() => {
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load();
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return (): void => {
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abortRef.current?.abort();
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};
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}, [load]);
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const updateConfig = useCallback(
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async (update: GlobalConfigUpdate): Promise<void> => {
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await updateGlobalConfig(update);
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load();
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},
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[load],
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);
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return { config, loading, error, refresh: load, updateConfig };
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}
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