From 882e1abff2ebdbbc4be792d16365469b58ccf05f Mon Sep 17 00:00:00 2001
From: Dominic Go <18517029+dominicstop@users.noreply.github.com>
Date: Fri, 31 Mar 2023 01:43:11 +0800
Subject: [PATCH] =?UTF-8?q?=E2=AD=90=EF=B8=8F=20Impl:=20`RNIObjectMetadata?=
 =?UTF-8?q?`?=
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---
 .../Helpers+Utilities/RNIObjectMetadata.swift | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 ios/src_library/Helpers+Utilities/RNIObjectMetadata.swift

diff --git a/ios/src_library/Helpers+Utilities/RNIObjectMetadata.swift b/ios/src_library/Helpers+Utilities/RNIObjectMetadata.swift
new file mode 100644
index 00000000..641d261e
--- /dev/null
+++ b/ios/src_library/Helpers+Utilities/RNIObjectMetadata.swift
@@ -0,0 +1,35 @@
+//
+//  RNIObjectMetadata.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 3/31/23.
+//
+
+import Foundation
+
+fileprivate let RNIObjectMetadataMap = NSMapTable<AnyObject, AnyObject>(
+  keyOptions: .weakMemory,
+  valueOptions: .strongMemory
+);
+
+public protocol RNIObjectMetadata: AnyObject {
+  associatedtype T: AnyObject;
+  
+  var metadata: T? { get set };
+};
+
+public extension RNIObjectMetadata {
+  var metadata: T? {
+    set {
+      if let newValue = newValue {
+        RNIObjectMetadataMap.setObject(newValue, forKey: self);
+        
+      } else {
+        RNIObjectMetadataMap.removeObject(forKey: self);
+      };
+    }
+    get {
+      RNIObjectMetadataMap.object(forKey: self) as? T
+    }
+  };
+};