114 lines
3.4 KiB
TypeScript
114 lines
3.4 KiB
TypeScript
/**
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* Identity-resolution event stream — opens an SSE connection to
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* `/identities/events` and dispatches typed events to the caller.
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*
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* Mirrors `useTopologyStream` (reconnect on error after 3s, callbacks
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* stashed in refs so the connection isn't torn down on every consumer
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* rerender). The stream is broadly scoped — every identity event, not
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* per-uuid — because both AttackerDetail and IdentityDetail want the
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* same firehose:
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*
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* * AttackerDetail watches for `identity.formed` events whose payload
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* references its observation uuid (the badge appears once the
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* clusterer binds the row), plus `merged` / `unmerged` so the
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* badge link updates if the row's identity gets re-pointed.
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* * IdentityDetail watches for `observation.linked` / `merged` /
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* `unmerged` against the identity it's rendering.
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*
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* Each consumer applies its own filter inside `onEvent`; the hook
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* itself is dumb glue.
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*/
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import { useEffect, useRef } from 'react';
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export type IdentityStreamEventName =
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| 'snapshot'
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| 'formed'
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| 'observation.linked'
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| 'merged'
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| 'unmerged'
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| 'campaign.assigned';
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export interface IdentityStreamEvent {
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name: IdentityStreamEventName | string;
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topic?: string;
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type?: string;
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ts?: string;
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payload: Record<string, unknown>;
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}
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export interface UseIdentityStreamOptions {
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enabled: boolean;
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onEvent: (event: IdentityStreamEvent) => void;
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onError?: () => void;
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}
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const NAMED_EVENTS: IdentityStreamEventName[] = [
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'snapshot',
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'formed',
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'observation.linked',
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'merged',
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'unmerged',
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'campaign.assigned',
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];
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export function useIdentityStream({
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enabled,
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onEvent,
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onError,
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}: UseIdentityStreamOptions): void {
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const esRef = useRef<EventSource | null>(null);
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const reconnectRef = useRef<ReturnType<typeof setTimeout> | null>(null);
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const onEventRef = useRef(onEvent);
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const onErrorRef = useRef(onError);
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useEffect(() => { onEventRef.current = onEvent; }, [onEvent]);
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useEffect(() => { onErrorRef.current = onError; }, [onError]);
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useEffect(() => {
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if (!enabled) return;
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const connect = () => {
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if (esRef.current) esRef.current.close();
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const token = localStorage.getItem('token') ?? '';
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const baseUrl = import.meta.env.VITE_API_URL || 'http://localhost:8000/api/v1';
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const url = `${baseUrl}/identities/events?token=${encodeURIComponent(token)}`;
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const es = new EventSource(url);
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esRef.current = es;
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const dispatch = (name: string) => (event: MessageEvent) => {
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try {
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const parsed = JSON.parse(event.data) as Partial<IdentityStreamEvent>;
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onEventRef.current({
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name,
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topic: parsed.topic,
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type: parsed.type,
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ts: parsed.ts,
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payload: (parsed.payload ?? {}) as Record<string, unknown>,
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});
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} catch (err) {
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console.error('useIdentityStream: parse failed', err);
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}
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};
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for (const name of NAMED_EVENTS) {
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es.addEventListener(name, dispatch(name) as EventListener);
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}
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es.onerror = () => {
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es.close();
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esRef.current = null;
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onErrorRef.current?.();
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reconnectRef.current = setTimeout(connect, 3000);
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};
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};
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connect();
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return () => {
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if (reconnectRef.current) clearTimeout(reconnectRef.current);
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if (esRef.current) esRef.current.close();
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esRef.current = null;
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};
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}, [enabled]);
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}
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