feat: Add OperationHandler for PATCH

src/ldp/operations/SimplePatchOperationHandler.ts

@@ -0,0 +1,26 @@
+import { Operation } from './Operation';
+import { OperationHandler } from './OperationHandler';
+import { Patch } from '../http/Patch';
+import { ResourceStore } from '../../storage/ResourceStore';
+import { ResponseDescription } from './ResponseDescription';
+import { UnsupportedHttpError } from '../../util/errors/UnsupportedHttpError';
+
+export class SimplePatchOperationHandler extends OperationHandler {
+  private readonly store: ResourceStore;
+
+  public constructor(store: ResourceStore) {
+    super();
+    this.store = store;
+  }
+
+  public async canHandle(input: Operation): Promise<void> {
+    if (input.method !== 'PATCH') {
+      throw new UnsupportedHttpError('This handler only supports PATCH operations.');
+    }
+  }
+
+  public async handle(input: Operation): Promise<ResponseDescription> {
+    await this.store.modifyResource(input.target, input.body as Patch);
+    return { identifier: input.target };
+  }
+}