⭐️ Impl: Add UIViewController+Swizzling

Summary: WIP - Initial impl. for `UIViewController+Swizzling`

ios/src_library/Helpers+Utilities/UIViewController+Swizzling.swift

@@ -0,0 +1,112 @@
+//
+//  RNIModalSwizzledViewController.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 4/11/23.
+//
+
+import Foundation
+
+
+extension UIViewController {
+
+  static var isSwizzled = false;
+
+  @objc fileprivate func _swizzled_present(
+    _ viewControllerToPresent: UIViewController,
+    animated flag: Bool,
+    completion: (() -> Void)? = nil
+  ) {
+    #if DEBUG
+    print(
+        "Log - UIViewController+Swizzling"
+      + " - UIViewController._swizzled_present invoked"
+      + " - arg viewControllerToPresent: \(viewControllerToPresent)"
+      + " - arg animated: \(flag)"
+    );
+    #endif
+
+    // call original impl.
+    self._swizzled_present(viewControllerToPresent, animated: flag) {
+      #if DEBUG
+      print(
+          "Log - UIViewController+Swizzling"
+        + " - UIViewController._swizzled_present"
+        + " - completion invoked"
+      );
+      #endif
+
+      completion?();
+    };
+  };
+
+  @objc fileprivate func _swizzled_dismiss(
+    animated flag: Bool,
+    completion: (() -> Void)? = nil
+  ) {
+    #if DEBUG
+    print(
+        "Log - UIViewController+Swizzling"
+      + " - UIViewController._swizzled_dismiss invoked"
+      + " - arg animated: \(flag)"
+      + " - self.presentedViewController: \(String(describing: presentedViewController))"
+    );
+    #endif
+
+    // call original impl.
+    self._swizzled_dismiss(animated: flag) {
+      #if DEBUG
+      print(
+          "Log - UIViewController+Swizzling"
+        + " - UIViewController._swizzled_dismiss"
+        + " - completion invoked"
+      );
+      #endif
+      completion?();
+    };
+  };
+
+  // TODO: Move to `RNIUtilities`
+  static func swizzleExchangeMethods(
+    defaultSelector: Selector,
+    newSelector: Selector,
+    forClass class: AnyClass
+  ) {
+    let defaultInstace =
+      class_getInstanceMethod(`class`.self, defaultSelector);
+
+    let newInstance =
+      class_getInstanceMethod(`class`.self, newSelector);
+
+    guard let defaultInstance = defaultInstace,
+          let newInstance = newInstance
+    else { return };
+
+    method_exchangeImplementations(defaultInstance, newInstance);
+  };
+
+  internal static func swizzleMethods() {
+    guard RNIModalSwizzling.shouldEnableSwizzling else { return };
+
+    #if DEBUG
+    print(
+        "Log - UIViewController+Swizzling"
+      + " - UIViewController.swizzleMethods invoked"
+    );
+    #endif
+
+    self.swizzleExchangeMethods(
+      defaultSelector: #selector(Self.present(_:animated:completion:)),
+      newSelector:  #selector(Self._swizzled_present(_:animated:completion:)),
+      forClass: UIViewController.self
+    );
+
+    self.swizzleExchangeMethods(
+      defaultSelector: #selector(Self.dismiss(animated:completion:)),
+      newSelector: #selector(Self._swizzled_dismiss(animated:completion:)),
+      forClass: UIViewController.self
+    );
+
+    self.isSwizzled.toggle();
+  };
+};

ios/src_library/React Native/RNIModal/RNIModalSwizzling.swift

@@ -0,0 +1,12 @@
+//
+//  RNIModalSwizzling.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 4/12/23.
+//
+
+import Foundation
+
+public class RNIModalSwizzling {
+  static var shouldEnableSwizzling = true;
+};

ios/src_library/React Native/RNIModalView/RNIModalViewManager.swift

@@ -25,6 +25,10 @@ class RNIModalViewManager: RCTViewManager {
   override init() {
     super.init();
     RNIModalViewManager.sharedInstance = self;
+
+    if !UIViewController.isSwizzled {
+      UIViewController.swizzleMethods();
+    };
   };
 
   @objc override func constantsToExport() -> [AnyHashable : Any]! {