feat: add simple permissions related handlers

src/ldp/permissions/SimplePermissionsExtractor.ts

@@ -0,0 +1,18 @@
+import { Operation } from '../operations/Operation';
+import { PermissionSet } from './PermissionSet';
+import { PermissionsExtractor } from './PermissionsExtractor';
+
+export class SimplePermissionsExtractor extends PermissionsExtractor {
+  public async canHandle(): Promise<void> {
+    return undefined;
+  }
+
+  public async handle(input: Operation): Promise<PermissionSet> {
+    return {
+      read: input.method === 'GET',
+      append: false,
+      write: input.method === 'POST' || input.method === 'PUT',
+      delete: input.method === 'DELETE',
+    };
+  }
+}