⭐️ Impl: ModalViewControllerEventsNotifiable

ios/Temp/ModalSheetViewControllerLifecycleNotifier.swift

@@ -9,7 +9,7 @@ import UIKit
 import DGSwiftUtilities
 
 
-open class ModalSheetViewControllerLifecycleNotifier: ViewControllerLifecycleNotifier {
+open class ModalSheetViewControllerLifecycleNotifier: ModalViewControllerLifecycleNotifier {
 
   private var _didSetup = false;
   private var _didSetupRootScrollView = false;
@@ -56,11 +56,13 @@ open class ModalSheetViewControllerLifecycleNotifier: ViewControllerLifecycleNot
   };
 
   public override func viewDidAppear(_ animated: Bool) {
+    defer {
+      super.viewDidAppear(animated);
+    };
+
     if self.isAppearingForTheFirstTime {
       self.setupRootScrollViewIfNeeded();
     };
-
-    super.viewDidAppear(animated);
   };
 
   // MARK: - Setup

ios/Temp/ModalViewControllerEventsNotifiable.swift

@@ -0,0 +1,66 @@
+//
+//  ModalViewControllerEventsNotifiable.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 9/30/24.
+//
+
+import UIKit
+
+
+public protocol ModalViewControllerEventsNotifiable {
+
+  func notifyOnModalWillPresent(
+    sender: UIViewController,
+    isAnimated: Bool
+  );
+
+  func notifyOnModalDidPresent(
+    sender: UIViewController,
+    isAnimated: Bool
+  );
+
+  func notifyOnModalWillDismiss(
+    sender: UIViewController,
+    isAnimated: Bool
+  );
+
+  func notifyOnModalDidDismiss(
+    sender: UIViewController,
+    isAnimated: Bool
+  );
+};
+
+// MARK: - ModalViewControllerEventsNotifiable
+// -------------------------------------------
+
+public extension ModalViewControllerEventsNotifiable {
+
+  func notifyOnModalWillPresent(
+    sender: UIViewController,
+    isAnimated: Bool
+  ) {
+    // no-op
+  };
+
+  func notifyOnModalDidPresent(
+    sender: UIViewController,
+    isAnimated: Bool
+  ) {
+    // no-op
+  };
+
+  func notifyOnModalWillDismiss(
+    sender: UIViewController,
+    isAnimated: Bool
+  ) {
+    // no-op
+  };
+
+  func notifyOnModalDidDismiss(
+    sender: UIViewController,
+    isAnimated: Bool
+  ) {
+    // no-op
+  };
+};

ios/Temp/ModalViewControllerLifecycleNotifier.swift

@@ -0,0 +1,126 @@
+//
+//  ModalViewControllerLifecycleNotifier.swift
+//  react-native-ios-modal
+//
+//  Created by Dominic Go on 9/30/24.
+//
+
+import UIKit
+import DGSwiftUtilities
+
+
+open class ModalViewControllerLifecycleNotifier: ViewControllerLifecycleNotifier {
+
+  public var isExplicitlySomeKindOfModal = false;
+  public var isExplicitlyBeingDismissed = false;
+
+  private(set) public var modalLifecycleEventDelegates:
+    MulticastDelegate<ModalViewControllerEventsNotifiable> = .init();
+
+  // MARK: - View Controller Lifecycle
+  // ---------------------------------
+
+  public override func viewWillAppear(_ animated: Bool) {
+    defer {
+      super.viewWillAppear(animated);
+    };
+
+    guard self.isAppearingForTheFirstTime else {
+      return;
+    };
+
+    self.isExplicitlySomeKindOfModal =
+         self.isBeingPresented
+      || self.presentingViewController?.presentedViewController === self;
+
+    guard self.isExplicitlySomeKindOfModal else {
+      return;
+    };
+
+    self.modalLifecycleEventDelegates.invoke {
+      $0.notifyOnModalWillPresent(
+        sender: self,
+        isAnimated: animated
+      );
+    };
+  };
+
+  public override func viewDidAppear(_ animated: Bool) {
+    defer {
+      super.viewDidAppear(animated);
+    };
+
+    guard self.isAppearingForTheFirstTime,
+          self.isExplicitlySomeKindOfModal
+    else {
+      return;
+    };
+
+    self.modalLifecycleEventDelegates.invoke {
+      $0.notifyOnModalDidPresent(
+        sender: self,
+        isAnimated: animated
+      );
+    };
+  };
+
+  public override func viewWillDisappear(_ animated: Bool) {
+    defer {
+      super.viewWillDisappear(animated);
+    };
+
+    guard self.isBeingDismissed,
+          self.isExplicitlySomeKindOfModal
+    else {
+      return;
+    };
+
+    guard animated,
+          let transitionCoordinator = self.transitionCoordinator
+    else {
+      self.isExplicitlyBeingDismissed = true;
+
+      self.modalLifecycleEventDelegates.invoke {
+        $0.notifyOnModalWillDismiss(
+          sender: self,
+          isAnimated: false
+        );
+      };
+      return;
+    };
+
+    transitionCoordinator.notifyWhenInteractionChanges { context in
+      guard !context.isCancelled else {
+        return;
+      };
+
+      self.isExplicitlyBeingDismissed = true;
+      self.modalLifecycleEventDelegates.invoke {
+        $0.notifyOnModalWillDismiss(
+          sender: self,
+          isAnimated: context.isAnimated
+        );
+      };
+    };
+  };
+
+  public override func viewDidDisappear(_ animated: Bool) {
+    defer {
+      super.viewDidDisappear(animated);
+    };
+
+    guard self.isBeingDismissed,
+          self.isExplicitlySomeKindOfModal,
+          self.isExplicitlyBeingDismissed
+    else {
+      return;
+    };
+
+    self.modalLifecycleEventDelegates.invoke {
+      $0.notifyOnModalDidDismiss(
+        sender: self,
+        isAnimated: animated
+      );
+    };
+  };
+};

ios/Temp/ViewControllerLifecycleNotifier.swift

@@ -58,9 +58,14 @@ open class ViewControllerLifecycleNotifier: UIViewController {
         "ViewControllerLifecycleNotifier.\(#function)",
         "\n - instance:", Unmanaged.passUnretained(self).toOpaque(),
         "\n - className:", self.className,
+        "\n - self:", self.debugDescription,
         "\n - animated:", animated,
         "\n - isBeingPresented:", self.isBeingPresented,
         "\n - isAppearingForTheFirstTime:", self.isAppearingForTheFirstTime,
+        "\n - presentationController:", self.presentationController.debugDescription,
+        "\n - transitionCoordinator:", self.transitionCoordinator?.debugDescription ?? "N/A",
+        "\n - presentingViewController:", self.presentingViewController?.debugDescription ?? "N/A",
+        "\n - presentingViewController.presentedViewController:", self.presentingViewController?.presentedViewController.debugDescription ?? "N/A",
         "\n"
       );
     };