ENG-31: Solid-OIDC Client Id Document support

id.jsonld

@@ -0,0 +1,11 @@
+{
+  "token_endpoint_auth_method": "none",
+  "client_id": "http://localhost:8080/id.jsonld",
+  "redirect_uris": [
+    "http://localhost:8080/callback.html"
+  ],
+  "response_types": [
+    "code"
+  ],
+  "@context": "https://www.w3.org/ns/solid/oidc-context.jsonld"
+}

index.html

@@ -19,6 +19,7 @@
                 CachingAuthorizationServerProvider,
                 CachingClientProvider,
                 CachingIssuerProvider,
+                // ClientIdClientProvider,
                 DPoPTokenProvider,
                 DynamicRegistrationClientProvider,
                 ReactiveFetchManager,
@@ -34,6 +35,7 @@
             const cachingASProvider = new CachingAuthorizationServerProvider(asProvider)
             const callbackUri = new URL("/callback.html", location.href).toString()
             const clientProvider = new DynamicRegistrationClientProvider
+            // const clientProvider = new ClientIdClientProvider(new URL("./id.jsonld", location.href))
             const cachingClientProvider = new CachingClientProvider(clientProvider)
 
             const dPoPTokenProvider = new DPoPTokenProvider(callbackUri, ui, cachingASProvider, cachingClientProvider)

src/ClientIdClientProvider.ts

@@ -0,0 +1,12 @@
+import type { ClientProvider } from "./ClientProvider.js"
+import * as oauth from "oauth4webapi"
+
+export class ClientIdClientProvider implements ClientProvider {
+    constructor(private clientIdDocUri: URL) {
+    }
+
+    async getClient(_: oauth.AuthorizationServer, __: string, signal: AbortSignal): Promise<oauth.Client> {
+        const response = await fetch(this.clientIdDocUri, {signal})
+        return await response.json()
+    }
+}

src/mod.ts

@@ -21,3 +21,4 @@ export * from "./CachingAuthorizationServerProvider.js"
 export * from "./ClientProvider.js"
 export * from "./DynamicRegistrationClientProvider.js"
 export * from "./CachingClientProvider.js"
+export * from "./ClientIdClientProvider.js"