From 59e2c480b85382d5ebb4644c03d98f9c9fd3533d Mon Sep 17 00:00:00 2001
From: Beyza Erkan <76122007+beyzaerkan@users.noreply.github.com>
Date: Thu, 21 Jul 2022 21:43:12 +0300
Subject: [PATCH] proxy added (#46)

---
 lib/ModelInstance.ts | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/ModelInstance.ts b/lib/ModelInstance.ts
index 8a254aa..262a528 100644
--- a/lib/ModelInstance.ts
+++ b/lib/ModelInstance.ts
@@ -1,5 +1,5 @@
 import Model from './Model';
-import { safeWrite } from './Utilities';
+import { safeWrite, getKeyValue } from './Utilities';
 
 export interface DataInfo {
   redisKey: String,
@@ -9,6 +9,7 @@ interface ModelFields {
   _model: Model;
   _previousDataValues: any | Object;
   _dataInfo: DataInfo;
+  _changedValues: any | Object;
 }
 
 /**
@@ -36,10 +37,20 @@ class ModelInstance {
       _model: model,
       _previousDataValues: data,
       _dataInfo: dataInfo,
+      _changedValues: {},
     };
     Object.entries(data).forEach(([key, defaultValue]) => {
       this[key] = defaultValue;
     });
+    const handler =  {
+      set: (target: Object, key: string, value: any)=>{
+        this._Model._changedValues[`${key}`] = getKeyValue(key)(target);
+        target[key as keyof Object] = value;
+        return true;
+      }
+    }
+    let proxy: any  = new Proxy(this, handler);
+    return proxy;
   }
 
   /**
@@ -48,7 +59,12 @@ class ModelInstance {
   public async save(): Promise<void> {
     const { _Model, ...data } = this;
     const { redisClient, flexSchema, schema } = _Model._model;
-    await safeWrite(data, _Model._dataInfo.redisKey, redisClient, schema, flexSchema);
+    const keys = Object.keys(_Model._changedValues);
+    const tempData: Object = {};
+    keys.forEach((key) => {
+      tempData[key as keyof Object] = data[key];
+    });
+    await safeWrite(tempData, _Model._dataInfo.redisKey, redisClient, schema, flexSchema);
   }
 
   /**