feat: initial boilerplate

api/libraries/event-store/aggregates/organization.ts

@@ -0,0 +1,65 @@
+import { AggregateRoot, getDate, makeAggregateReducer } from "@valkyr/event-store";
+
+import { db } from "~libraries/read-store/mod.ts";
+
+import { Auditor } from "../events/auditor.ts";
+import { EventStoreFactory } from "../events/mod.ts";
+import { projector } from "../projector.ts";
+
+export class Organization extends AggregateRoot<EventStoreFactory> {
+  static override readonly name = "organization";
+
+  id!: string;
+
+  name!: string;
+
+  createdAt!: Date;
+  updatedAt!: Date;
+
+  // -------------------------------------------------------------------------
+  // Factories
+  // -------------------------------------------------------------------------
+
+  static #reducer = makeAggregateReducer(Organization);
+
+  static create(name: string, meta: Auditor): Organization {
+    return new Organization().push({
+      type: "organization:created",
+      data: { name },
+      meta,
+    });
+  }
+
+  static async getById(stream: string): Promise<Organization | undefined> {
+    return this.$store.reduce({ name: "organization", stream, reducer: this.#reducer });
+  }
+
+  // -------------------------------------------------------------------------
+  // Reducer
+  // -------------------------------------------------------------------------
+
+  with(event: EventStoreFactory["$events"][number]["$record"]): void {
+    switch (event.type) {
+      case "organization:created": {
+        this.id = event.stream;
+        this.name = event.data.name;
+        this.createdAt = getDate(event.created);
+        break;
+      }
+    }
+  }
+}
+
+/*
+ |--------------------------------------------------------------------------------
+ | Projectors
+ |--------------------------------------------------------------------------------
+ */
+
+projector.on("organization:created", async ({ stream: id, data: { name }, created }) => {
+  await db.collection("organizations").insertOne({
+    id,
+    name,
+    createdAt: getDate(created),
+  });
+});