⭐️ Impl: RNIObjectMetadata

dominicstop · Mar 30, 2023 · 882e1ab · 882e1ab
1 parent 2773225
commit 882e1ab
Showing 1 changed file with 35 additions and 0 deletions.
diff --git a/ios/src_library/Helpers+Utilities/RNIObjectMetadata.swift 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
+    }
+  };
+};