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>
66 lines
1.9 KiB
TypeScript
66 lines
1.9 KiB
TypeScript
/**
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* React hook for fetching and updating the blocklist import schedule.
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*/
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import { useCallback, useEffect, useRef, useState } from "react";
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import { fetchSchedule, updateSchedule } from "../api/blocklist";
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import { handleFetchError, createStringErrorAdapter } from "../utils/fetchError";
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import type { ScheduleConfig, ScheduleInfo } from "../types/blocklist";
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export interface UseScheduleReturn {
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info: ScheduleInfo | null;
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loading: boolean;
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error: string | null;
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saveSchedule: (config: ScheduleConfig) => Promise<void>;
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refresh: () => void;
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}
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/**
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* Fetch and update the blocklist import schedule.
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*/
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export function useSchedule(): UseScheduleReturn {
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const [info, setInfo] = useState<ScheduleInfo | 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 refresh = useCallback((): void => {
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abortRef.current?.abort();
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const controller = new AbortController();
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abortRef.current = controller;
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setLoading(true);
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setError(null);
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fetchSchedule(controller.signal)
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.then((data) => {
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if (controller.signal.aborted) return;
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setInfo(data);
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})
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.catch((err: unknown) => {
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if (controller.signal.aborted) return;
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handleFetchError(err, createStringErrorAdapter(setError), "Failed to load schedule");
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})
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.finally(() => {
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if (!controller.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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refresh();
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return (): void => {
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abortRef.current?.abort();
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};
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}, [refresh]);
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const saveSchedule = useCallback(async (config: ScheduleConfig): Promise<void> => {
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const updated = await updateSchedule(config);
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setInfo(updated);
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}, []);
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return { info, loading, error, saveSchedule, refresh };
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}
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