feat: adds a12n-server

.github/ISSUE_TEMPLATE/2_bug_provider.yml

@@ -24,6 +24,7 @@ body:
         - "Email"
         - "Custom provider"
         - "42 School"
+        - "a12n-server"
         - "Apple"
         - "Asgardeo"
         - "Atlassian"

packages/core/src/providers/a12n-server.ts

@@ -0,0 +1,123 @@
+import type { Profile } from "../types.js"
+import type {
+  CommonProviderOptions,
+  OIDCConfig,
+  OIDCUserConfig,
+} from "./index.js"
+/**
+ * <div class="provider" style={{ display: "flex", justifyContent: "space-between", color: "#fff" }}>
+ * <span>Built-in <b>a12n-server</b> integration.</span>
+ * <a href="https://github.com/.org">
+ *   <img style={{display: "block"}} src="https://authjs.dev/img/providers/a12n-server.svg" height="48" width="48"/>
+ * </a>
+ * </div>
+ *
+ * @module providers/a12n-server
+ */
+
+export interface A12nServerProfile
+  extends Record<keyof CommonProviderOptions, string> {
+  id: string
+  /* The provider name used on the default sign-in page's sign-in button. */
+  name: string
+  token_type?: "bearer" | "refresh_token"
+  type: "oidc"
+}
+
+/**
+ * Add a12n-server login to your page.
+ *
+ * ### Setup
+ *
+ * In `.env` create the following entries:
+ * {@link https://github.com/curveball/next-a12n?tab=readme-ov-file#environment-variables}
+ * ```
+ * AUTH_A12N_ISSUER=
+ * AUTH_A12N_ID=
+ * AUTH_A12N_SECRET=
+ * ```
+ *
+ * #### Callback URL
+ * ```
+ * https://your-site-or-backend.com/api/auth/callback/a12n-server
+ * ```
+ *
+ * #### Configuration
+ *```ts
+ * import { Auth } from "@auth/core"
+ * import a12n from "@auth/core/providers/a12n-server"
+ *
+ * const request = new Request(origin)
+ * const response = await Auth(request, {
+ *   providers: [
+ *     a12n({
+ *     clientId: process.env.AUTH_A12N_ID,
+ *     clientSecret: process.env.AUTH_A12N_SECRET
+ *    }),
+ *   ]
+ * })
+ * ```
+ *
+ * ### Resources
+ *
+ * - a12n-server [Overview](https://github.com/curveball/a12n-server/blob/main/docs/getting-started.md)
+ * [Set up a12n-server](https://github.com/curveball/next-a12n/blob/main/README.md#setting-up-a12n-server)
+ * - [How to add a new client to a12n-server](https://github.com/curveball/next-a12n/tree/main?tab=readme-ov-file#register-a-new-client-side-web-app-on-curveballa12n-server)
+ * - [How to retrieve the user's information from your a12n-server](https://github.com/curveball/a12n-server/blob/main/docs/user-api.md)
+ * - [Learn more about OAuth](https://authjs.dev/concepts/oauth)
+ *
+ * ### Notes
+ *
+ * Grant type: Authorization Code
+ *
+ * By default, Auth.js assumes that the a12n-server Oauth2 provider is
+ * based on the [OAuth 2](https://www.rfc-editor.org/rfc/rfc6749.html) specification.
+ *
+ * :::tip
+ *
+ * ## Help
+ *
+ * If you think you found a bug in the default configuration, you can [open an issue](https://authjs.dev/new/provider-issue).
+ *
+ * Auth.js strictly adheres to the specification and it cannot take responsibility for any deviation from
+ * the spec by the provider. You can open an issue, but if the problem is non-compliance with the spec,
+ * we might not pursue a resolution. You can ask for more help in [Discussions](https://authjs.dev/new/github-discussions).
+ */
+export interface A12nServerUserProfile
+  extends Record<keyof Profile, Profile[keyof Profile]> {
+  sub: string
+  email?: string
+  email_verified?: boolean
+  name: string
+  website?: string
+  zoneinfo?: string
+  given_name?: string
+  family_name?: string
+  preferred_username?: string
+  phone_number?: string
+  phone_number_verified?: boolean
+  locale?: string
+  updated_at: number
+  picture?: string
+  address?: string
+  birthdate?: string
+}
+
+export default function a12n(
+  config: OIDCConfig<A12nServerProfile>
+): OIDCUserConfig<A12nServerUserProfile> {
+  return {
+    id: "a12n-server",
+    name: "a12n-server",
+    issuer: config.issuer,
+    clientId: config.clientId,
+    clientSecret: config.clientSecret,
+    checks: ["pkce", "state", "nonce"],
+    profile(profile) {
+      return {
+        ...profile,
+        updated_at: Date.now(),
+      } satisfies A12nServerUserProfile
+    },
+  }
+}