fix(oidc-provider): fix oidcCtx.getGrant()

Closes: #1942

docs/tutorials/oidc.md

@@ -211,7 +211,7 @@ The controller Interactions exposes the routes to display any interaction. Here
 The `uid` is the unique session id used by oidc-provider to identify the current user flow.
 :::
 
-Now that we have our interactions controller, we can create our first interaction.
+Now that we have our interaction controller, we can create our first interaction.
 
 Create a new directory `interactions`. We will store all custom interactions in this directory.
 
@@ -280,6 +280,51 @@ http://localhost:8083/auth?client_id=client_id&response_type=id_token&scope=open
 
 <figure><img alt="Oidc login page" src="./../assets/oidc/signin-page.png" style="max-height: 400px"></figure>
 
+## Alter configuration
+
+Some part of the OIDC provider configuration needs function to work. And ideally these functions should have access to our Ts.ED Services.
+
+It's possible to do that by listening the `$alterOidcConfiguration` hook and inject the expected functions in the configuration:
+
+```typescript
+import {Module} from "@tsed/oidc-provider";
+import {OidcSettings, OidcProviderContext} from "@tsed/oidc-provider";
+import {set} from "lodash";
+
+@Module()
+class OidcResourceIndicatorsModule {
+  @InjectContext()
+  protected $ctx: PlatformContext; // retrieve the Ts.ED context
+
+  async $alterOidcConfiguration(config: OidcSettings): Promise<OidcSettings> {
+    // example with the
+    config.features.resourceIndicators = {
+      enabled: true,
+      defaultResource: this.defaultResource.bind(this),
+      getResourceServerInfo: this.getResourceServerInfo.bind(this),
+      useGrantedResource: this.useGrantedResource.bind(this)
+    };
+
+    return config;
+  }
+
+  protected async defaultResource(ctx: KoaContextWithOIDC) {
+    ///
+  }
+
+  protected async getResourceServerInfo(ctx: KoaContextWithOIDC, resourceIndicator: string, client: Client): Promise<string | string[]> {
+    ///
+  }
+
+  protected async useGrantedResource(
+    ctx: KoaContextWithOIDC,
+    model: AuthorizationCode | RefreshToken | DeviceCode | BackchannelAuthenticationRequest
+  ): Promise<Boolean> {
+    return true;
+  }
+}
+```
+
 ## Alter OIDC policy
 
 Ts.ED emits a special `$alterOidcPolicy` event when @tsed/oidc-provider links interactions with OIDC policy. You can change the policy configuration

packages/security/oidc-provider/src/services/OidcInteractionContext.spec.ts

@@ -30,7 +30,7 @@ async function createOidcInteractionContextFixture(grantId: any = "grantId") {
     setProviderSession: jest.fn().mockResolvedValue(undefined),
     find: jest.fn().mockResolvedValue("grant"),
     Grant: class {
-      static find = jest.fn().mockResolvedValue(undefined);
+      static find = jest.fn().mockResolvedValue("grant");
     },
     Client: {
       find: jest.fn().mockResolvedValue({

packages/security/oidc-provider/src/services/OidcInteractionContext.ts

@@ -143,7 +143,7 @@ export class OidcInteractionContext {
     if (this.grantId) {
       // we'll be modifying existing grant in existing session
       // @ts-ignore
-      return await (this.oidcProvider.get().find || Grant.find)(this.grantId);
+      return await Grant.find(this.grantId);
     }
 
     return new Grant({

packages/security/oidc-provider/src/services/OidcProvider.ts

@@ -109,6 +109,9 @@ export class OidcProvider {
   async create(): Promise<void | OIDCProvider> {
     const {proxy = this.env === Env.PROD, secureKey, allowHttpLocalhost = this.env !== Env.PROD} = this.oidc;
     const configuration = await this.getConfiguration();
+
+    await this.injector.alterAsync("$alterOidcConfiguration", configuration);
+
     const oidcProvider = new OIDCProvider(this.getIssuer(), configuration);
 
     if (proxy) {