added doga

25_02_24/node_modules/json-server/lib/observer.js

@@ -0,0 +1,30 @@
+// Lowdb adapter to observe read/write events
+export class Observer {
+    #adapter;
+    onReadStart = function () {
+        return;
+    };
+    onReadEnd = function () {
+        return;
+    };
+    onWriteStart = function () {
+        return;
+    };
+    onWriteEnd = function () {
+        return;
+    };
+    constructor(adapter) {
+        this.#adapter = adapter;
+    }
+    async read() {
+        this.onReadStart();
+        const data = await this.#adapter.read();
+        this.onReadEnd(data);
+        return data;
+    }
+    async write(arg) {
+        this.onWriteStart();
+        await this.#adapter.write(arg);
+        this.onWriteEnd();
+    }
+}