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/http/input/metadata/AuthorizationParser.test.ts

@@ -0,0 +1,34 @@
+import { DataFactory } from 'n3';
+import { AuthorizationParser } from '../../../../../src/http/input/metadata/AuthorizationParser';
+import { RepresentationMetadata } from '../../../../../src/http/representation/RepresentationMetadata';
+import type { HttpRequest } from '../../../../../src/server/HttpRequest';
+import namedNode = DataFactory.namedNode;
+
+describe('An AuthorizationParser', (): void => {
+  const parser = new AuthorizationParser({ custom: 'http://example.com/pred' });
+  let request: HttpRequest;
+  let metadata: RepresentationMetadata;
+
+  beforeEach(async(): Promise<void> => {
+    request = { headers: {}} as HttpRequest;
+    metadata = new RepresentationMetadata();
+  });
+
+  it('does nothing if there is no authorization header.', async(): Promise<void> => {
+    await parser.handle({ request, metadata });
+    expect(metadata.quads()).toHaveLength(0);
+  });
+
+  it('converts the authorization header to the relevant triple.', async(): Promise<void> => {
+    request.headers.authorization = 'custom my-value';
+    await parser.handle({ request, metadata });
+    expect(metadata.quads()).toHaveLength(1);
+    expect(metadata.get(namedNode('http://example.com/pred'))?.value).toBe('my-value');
+  });
+
+  it('ignores unknown values.', async(): Promise<void> => {
+    request.headers.authorization = 'unknown my-value';
+    await parser.handle({ request, metadata });
+    expect(metadata.quads()).toHaveLength(0);
+  });
+});