✨ feat: initial prototype

apps/backend/src/lib/auth-plugin.ts

@@ -0,0 +1,44 @@
+import { isUserSuspended } from "@minikura/db";
+import { Elysia } from "elysia";
+import { auth } from "./auth";
+
+async function getSessionFromHeaders(headers: Headers | Record<string, string>) {
+  const headersObj =
+    headers instanceof Headers ? headers : new Headers(headers as Record<string, string>);
+
+  return auth.api.getSession({
+    headers: headersObj,
+  });
+}
+
+export const authPlugin = new Elysia({ name: "auth" })
+  .mount(auth.handler)
+  .derive({ as: "scoped" }, async ({ request }) => {
+    const session = await getSessionFromHeaders(request.headers);
+
+    if (
+      session?.user &&
+      isUserSuspended(
+        session.user as unknown as Pick<
+          { isSuspended: boolean; suspendedUntil: Date | null },
+          "isSuspended" | "suspendedUntil"
+        >
+      )
+    ) {
+      return {
+        user: null,
+        session: null,
+        isAuthenticated: false,
+        isSuspended: true,
+      };
+    }
+
+    return {
+      user: session?.user || null,
+      session: session?.session || null,
+      isAuthenticated: Boolean(session?.user),
+      isSuspended: false,
+    };
+  });
+
+export type AuthPlugin = typeof authPlugin;