feat: Full rework of account management

Complete rewrite of the account management and related systems.
Makes the architecture more modular,
allowing for easier extensions and configurations.

test/unit/identity/interaction/oidc/ClientInfoHandler.test.ts

@@ -0,0 +1,62 @@
+import type { ProviderFactory } from '../../../../../src/identity/configuration/ProviderFactory';
+import type { Interaction } from '../../../../../src/identity/interaction/InteractionHandler';
+import { ClientInfoHandler } from '../../../../../src/identity/interaction/oidc/ClientInfoHandler';
+import { BadRequestHttpError } from '../../../../../src/util/errors/BadRequestHttpError';
+import type Provider from '../../../../../templates/types/oidc-provider';
+
+/* eslint-disable @typescript-eslint/naming-convention */
+describe('A ClientInfoHandler', (): void => {
+  let oidcInteraction: Interaction;
+  const clientMetadata = {
+    client_id: 'clientId',
+    client_name: 'clientName',
+    unknownField: 'super-secret',
+  };
+  let provider: jest.Mocked<Provider>;
+  let providerFactory: jest.Mocked<ProviderFactory>;
+  let handler: ClientInfoHandler;
+
+  beforeEach(async(): Promise<void> => {
+    oidcInteraction = {
+      params: { client_id: 'clientId' },
+      session: { accountId: 'http://example.com/card#me' },
+    } as any;
+
+    provider = {
+      Client: {
+        find: (id: string): any => (id ? { metadata: jest.fn().mockReturnValue(clientMetadata) } : undefined),
+      },
+    } as any;
+
+    providerFactory = {
+      getProvider: jest.fn().mockResolvedValue(provider),
+    };
+
+    handler = new ClientInfoHandler(providerFactory);
+  });
+
+  it('returns the known client metadata fields.', async(): Promise<void> => {
+    await expect(handler.handle({ oidcInteraction } as any)).resolves.toEqual({ json: {
+      client: {
+        '@context': 'https://www.w3.org/ns/solid/oidc-context.jsonld',
+        client_id: 'clientId',
+        client_name: 'clientName',
+      },
+      webId: 'http://example.com/card#me',
+    }});
+  });
+
+  it('returns empty info if there is none.', async(): Promise<void> => {
+    delete oidcInteraction.params.client_id;
+    await expect(handler.handle({ oidcInteraction } as any)).resolves.toEqual({ json: {
+      client: {
+        '@context': 'https://www.w3.org/ns/solid/oidc-context.jsonld',
+      },
+      webId: 'http://example.com/card#me',
+    }});
+  });
+
+  it('errors if there is no OIDC interaction.', async(): Promise<void> => {
+    await expect(handler.handle({} as any)).rejects.toThrow(BadRequestHttpError);
+  });
+});