feat: version 2 beta

tests/adapters/mocks/user-posts-reducer.ts

@@ -0,0 +1,32 @@
+import { makeReducer } from "../../../libraries/reducer.ts";
+import { EventStoreFactory } from "./events.ts";
+
+export const userPostReducer = makeReducer<EventStoreFactory, UserPostState>(
+  (state, event) => {
+    switch (event.type) {
+      case "post:created": {
+        state.posts.push({ id: event.stream, author: event.meta.auditor });
+        state.count += 1;
+        break;
+      }
+      case "post:removed": {
+        state.posts = state.posts.filter(({ id }) => id !== event.stream);
+        state.count -= 1;
+        break;
+      }
+    }
+    return state;
+  },
+  () => ({
+    posts: [],
+    count: 0,
+  }),
+);
+
+type UserPostState = {
+  posts: {
+    id: string;
+    author: string;
+  }[];
+  count: number;
+};