feat: Allow passing an async function to NuxtAuthHandler

docs/nuxt-configuration.md

@@ -40,6 +40,8 @@ You *must* create a catch-all route at `server/api/auth/[...].ts`.
 ```ts
 import GithubProvider from "@auth/core/providers/github"
 import type { AuthConfig } from "@auth/core/types"
+import type { H3Event } from "h3"
+import { D1Adapter } from "@auth/d1-adapter"
 import { NuxtAuthHandler } from "#auth"
 
 // The #auth virtual import comes from this module. You can use it on the client
@@ -59,6 +61,25 @@ export const authOptions: AuthConfig = {
   ]
 }
 
+// authOptions can either be passed as an object like above,
+//  or as an async function which has the event as it's argument
+//  this is especially useful for database adapters that need access to the event object,
+//  such as D1Adapter
+export async function authOptionsFunction(event: H3Event) {
+  const authOptions: AuthConfig = {
+    secret: runtimeConfig.authJs.secret,
+    providers: [
+      GithubProvider({
+        clientId: runtimeConfig.github.clientId,
+        clientSecret: runtimeConfig.github.clientSecret
+      })
+    ],
+    adapter: D1Adapter(event.context.cloudflare.env.db)
+  }
+
+  return authOptions
+}
+
 export default NuxtAuthHandler(authOptions, runtimeConfig)
 // If you don't want to pass the full runtime config,
 //  you can pass something like this: { public: { authJs: { baseUrl: "" } } }

packages/authjs-nuxt/src/runtime/lib/server.ts

@@ -5,6 +5,7 @@ import { eventHandler, getRequestHeaders, getRequestURL } from "h3"
 import type { AuthConfig, Session } from "@auth/core/types"
 import { getToken } from "@auth/core/jwt"
 import { checkOrigin, getAuthJsSecret, getRequestFromEvent, getServerOrigin, makeCookiesFromCookieString } from "../utils"
+import type { AuthConfigFunction } from "./types"
 
 if (!globalThis.crypto) {
   // eslint-disable-next-line no-console
@@ -21,12 +22,14 @@ if (!globalThis.crypto) {
 /**
  * This is the event handler for the catch-all route.
  * Everything can be customized by adding a custom route that takes priority over the handler.
- * @param options AuthConfig
+ * @param options AuthConfig | AuthConfigFunction
  * @param runtimeConfig RuntimeConfig
  * @returns EventHandler
  */
-export function NuxtAuthHandler(options: AuthConfig, runtimeConfig: RuntimeConfig) {
+export function NuxtAuthHandler(options: AuthConfig | AuthConfigFunction, runtimeConfig: RuntimeConfig) {
   return eventHandler(async (event) => {
+    if (typeof options === "function") options = await options(event) as AuthConfig
+
     options.trustHost ??= true
     options.skipCSRFCheck = skipCSRFCheck
     const request = await getRequestFromEvent(event)

packages/authjs-nuxt/src/runtime/lib/types.ts

@@ -1,4 +1,6 @@
 import type { BuiltInProviderType, ProviderType } from "@auth/core/providers"
+import type { H3Event } from "h3"
+import type { AuthConfig } from "@auth/core/types"
 
 /**
  * Util type that matches some strings literally, but allows any other string as well.
@@ -44,3 +46,4 @@ export interface SignOutParams<R extends boolean = true> {
   /** [Documentation](https://next-auth.js.org/getting-started/client#using-the-redirect-false-option-1 */
   redirect?: R
 }
+export type AuthConfigFunction = (event: H3Event) => Promise<AuthConfig>