From 8c6f043f865b9894e545d9e79a7c5294b3397e99 Mon Sep 17 00:00:00 2001
From: Pablo Baleztena <pablo@ultharsoftware.com>
Date: Tue, 15 Oct 2024 15:16:10 -0300
Subject: [PATCH] [fabric/domain] Add Projection interface to handle model
 projection from events

---
 .../fabric/domain/src/projections/projection.ts     | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 packages/fabric/domain/src/projections/projection.ts

diff --git a/packages/fabric/domain/src/projections/projection.ts b/packages/fabric/domain/src/projections/projection.ts
new file mode 100644
index 0000000..801b963
--- /dev/null
+++ b/packages/fabric/domain/src/projections/projection.ts
@@ -0,0 +1,13 @@
+import { VariantTag } from "@fabric/core";
+import { Event } from "../events/event.js";
+import { StoredEvent } from "../events/stored-event.js";
+import { Model, ModelToType } from "../models/model.js";
+
+export interface Projection<TModel extends Model, TEvents extends Event> {
+  model: TModel;
+  events: TEvents[VariantTag][];
+  projection: (
+    event: StoredEvent<TEvents>,
+    model?: ModelToType<TModel>,
+  ) => ModelToType<TModel>;
+}