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/PromptHandler.test.ts

@@ -0,0 +1,33 @@
+import type { Interaction } from '../../../../../src/identity/interaction/InteractionHandler';
+import { PromptHandler } from '../../../../../src/identity/interaction/oidc/PromptHandler';
+import type { InteractionRoute } from '../../../../../src/identity/interaction/routing/InteractionRoute';
+import { BadRequestHttpError } from '../../../../../src/util/errors/BadRequestHttpError';
+
+describe('A PromptHandler', (): void => {
+  let oidcInteraction: Interaction;
+  let promptRoutes: Record<string, jest.Mocked<InteractionRoute>>;
+  let handler: PromptHandler;
+
+  beforeEach(async(): Promise<void> => {
+    oidcInteraction = { prompt: { name: 'login' }} as any;
+    promptRoutes = {
+      login: { getPath: jest.fn().mockReturnValue('http://example.com/idp/login/') } as any,
+    };
+    handler = new PromptHandler(promptRoutes);
+  });
+
+  it('errors if there is no interaction.', async(): Promise<void> => {
+    await expect(handler.handle({ } as any)).rejects.toThrow(BadRequestHttpError);
+  });
+
+  it('errors if the prompt is unsupported.', async(): Promise<void> => {
+    oidcInteraction.prompt.name = 'unsupported';
+    await expect(handler.handle({ oidcInteraction } as any)).rejects.toThrow(BadRequestHttpError);
+  });
+
+  it('returns a JSON body with the location and prompt.', async(): Promise<void> => {
+    await expect(handler.handle({ oidcInteraction } as any)).resolves.toEqual(
+      { json: { prompt: 'login', location: 'http://example.com/idp/login/' }},
+    );
+  });
+});