feat: add functional authentication

api/stores/event-store/aggregates/code.ts

@@ -0,0 +1,66 @@
+import { AggregateRoot, getDate } from "@valkyr/event-store";
+
+import { CodeIdentity } from "../events/code.ts";
+import { EventStoreFactory } from "../events/mod.ts";
+
+export class Code extends AggregateRoot<EventStoreFactory> {
+  static override readonly name = "code";
+
+  identity!: CodeIdentity;
+  value!: string;
+
+  createdAt!: Date;
+  claimedAt?: Date;
+
+  // -------------------------------------------------------------------------
+  // Accessors
+  // -------------------------------------------------------------------------
+
+  get isClaimed(): boolean {
+    return this.claimedAt !== undefined;
+  }
+
+  // -------------------------------------------------------------------------
+  // Folder
+  // -------------------------------------------------------------------------
+
+  with(event: EventStoreFactory["$events"][number]["$record"]): void {
+    switch (event.type) {
+      case "code:created": {
+        this.value = event.data.value;
+        this.identity = event.data.identity;
+        this.createdAt = getDate(event.created);
+        break;
+      }
+      case "code:claimed": {
+        this.claimedAt = getDate(event.created);
+        break;
+      }
+    }
+  }
+
+  // -------------------------------------------------------------------------
+  // Actions
+  // -------------------------------------------------------------------------
+
+  create(identity: CodeIdentity): this {
+    return this.push({
+      type: "code:created",
+      stream: this.id,
+      data: {
+        identity,
+        value: crypto
+          .getRandomValues(new Uint8Array(5))
+          .map((v) => v % 10)
+          .join(""),
+      },
+    });
+  }
+
+  claim(): this {
+    return this.push({
+      type: "code:claimed",
+      stream: this.id,
+    });
+  }
+}