refactor(server): use events system (#5149)

packages/backend/server/src/event/events.ts

@@ -1,23 +1,18 @@
-import type { Snapshot, User, Workspace } from '@prisma/client';
+import type { Snapshot, Workspace } from '@prisma/client';
 
-import { ChangePayload, Flatten, Payload } from './types';
+import { Flatten, Payload } from './types';
 
 interface EventDefinitions {
-  user: {
-    created: Payload<User>;
-    updated: Payload<ChangePayload<User>>;
-    deleted: Payload<User['id']>;
-  };
-
   workspace: {
-    created: Payload<Workspace>;
-    updated: Payload<ChangePayload<Workspace>>;
     deleted: Payload<Workspace['id']>;
   };
 
   snapshot: {
-    created: Payload<Snapshot>;
-    updated: Payload<ChangePayload<Snapshot>>;
+    updated: Payload<
+      Pick<Snapshot, 'id' | 'workspaceId'> & {
+        previous: Pick<Snapshot, 'blob' | 'state' | 'updatedAt'>;
+      }
+    >;
     deleted: Payload<Pick<Snapshot, 'id' | 'workspaceId'>>;
   };
 }

packages/backend/server/src/event/index.ts

@@ -5,7 +5,7 @@ import {
   OnEvent as RawOnEvent,
 } from '@nestjs/event-emitter';
 
-import { Event, EventPayload } from './events';
+import type { Event, EventPayload } from './events';
 
 @Injectable()
 export class EventEmitter {
@@ -42,3 +42,4 @@ export const OnEvent = (
   exports: [EventEmitter],
 })
 export class EventModule {}
+export { EventPayload };

packages/backend/server/src/event/types.ts

@@ -3,11 +3,6 @@ export type Payload<T> = {
   data: T;
 };
 
-export type ChangePayload<T> = {
-  from: Partial<T>;
-  to: Partial<T>;
-};
-
 export type Join<A extends string, B extends string> = A extends ''
   ? B
   : `${A}.${B}`;
@@ -33,6 +28,6 @@ export type Leaves<T, P extends string = ''> = T extends Payload<any>
 export type Flatten<T> = Leaves<T> extends infer R
   ? {
       // @ts-expect-error yo, ts can't make it
-      [K in R]: PathType<T, K> extends Payload<infer U> ? { data: U } : never;
+      [K in R]: PathType<T, K> extends Payload<infer U> ? U : never;
     }
   : never;