Building Slack integration

backend/config/providers.ts

@@ -3,7 +3,8 @@ import type {
   ProviderSlug,
   SignatureScheme,
 } from '../types/integration.js';
-import { normalizeLinear, normalizeRest } from './normalizers.js';
+import { normalizeLinear, normalizeRest, normalizeSlack } from './normalizers.js';
+import { enrichSlackDelivery } from '../services/slack.service.js';
 
 export type ChallengeResponse = { status: number; body: unknown };
 
@@ -22,6 +23,15 @@ export type ProviderConfig = {
    * infrastructure; the payload mapping belongs to the integration itself.
    */
   normalize?: (payload: unknown) => NormalizedDelivery;
+  /**
+   * Runs after the ack, inside the retry queue, so it may make network calls.
+   * Receives the raw payload because some providers deliver a reference rather
+   * than content: a Slack reaction names a message without including its text.
+   */
+  enrich?: (
+    delivery: NormalizedDelivery,
+    payload: unknown
+  ) => Promise<NormalizedDelivery>;
   oauth?: {
     authorizeUrl: string;
     tokenUrl: string;
@@ -63,6 +73,8 @@ export const providers: Record<ProviderSlug, ProviderConfig> = {
     timestampHeader: 'x-slack-request-timestamp',
     secretEnvVar: 'SLACK_SIGNING_SECRET',
     challenge: slackChallenge,
+    normalize: normalizeSlack,
+    enrich: enrichSlackDelivery,
     oauth: {
       authorizeUrl: 'https://slack.com/oauth/v2/authorize',
       tokenUrl: 'https://slack.com/api/oauth.v2.access',