first commit

libs/api/identity/application/src/lib/commands/handle-identity-webhook.command.ts

@@ -0,0 +1,57 @@
+import { Logger } from '@nestjs/common';
+import { Command, CommandHandler, ICommandHandler } from '@nestjs/cqrs';
+import { SessionCache } from '../ports/session-cache.port';
+import { UserRegistry } from '../ports/user-registry.port';
+
+/** Reacts to Pireon webhooks: `user.deactivated` and `token.revoked`. */
+export class HandleIdentityWebhookCommand extends Command<void> {
+  constructor(
+    public readonly event: string,
+    public readonly data: Record<string, unknown>,
+  ) {
+    super();
+  }
+}
+
+@CommandHandler(HandleIdentityWebhookCommand)
+export class HandleIdentityWebhookHandler
+  implements ICommandHandler<HandleIdentityWebhookCommand>
+{
+  private readonly logger = new Logger(HandleIdentityWebhookHandler.name);
+
+  constructor(
+    private readonly cache: SessionCache,
+    private readonly registry: UserRegistry,
+  ) {}
+
+  async execute({ event, data }: HandleIdentityWebhookCommand): Promise<void> {
+    const userId =
+      data['user_id'] ??
+      data['userId'] ??
+      (data['user'] as { id?: unknown } | undefined)?.id;
+    if (userId === undefined || userId === null) {
+      this.logger.warn(`Webhook ${event} without user id, ignored`);
+      return;
+    }
+    const id = String(userId);
+
+    switch (event) {
+      case 'user.deactivated':
+        await Promise.all([this.deactivate(id), this.cache.evictUser(id)]);
+        break;
+      case 'token.revoked':
+        // Only token hashes are cached, so drop every session of that user.
+        await this.cache.evictUser(id);
+        break;
+      default:
+        this.logger.debug(`Unhandled identity webhook ${event}`);
+    }
+  }
+
+  private async deactivate(userId: string): Promise<void> {
+    const user = await this.registry.findById(userId);
+    if (!user) return;
+    user.deactivate();
+    await this.registry.upsert(user);
+  }
+}