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node_modules/expo-modules-core/ios/ReactDelegates/EXReactDelegateWrapper.h

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+// Copyright 2018-present 650 Industries. All rights reserved.
+
+#import <ExpoModulesCore/Platform.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class EXReactDelegate;
+
+/**
+ A wrapper of `ExpoReactDelegate` for Objective-C bindings.
+ */
+@interface EXReactDelegateWrapper : NSObject
+
+- (instancetype)initWithExpoReactDelegate:(EXReactDelegate *)expoReactDelegate;
+
+- (UIView *)createReactRootView:(NSString *)moduleName
+              initialProperties:(nullable NSDictionary *)initialProperties
+                  launchOptions:(nullable NSDictionary *)launchOptions;
+
+- (NSURL *)bundleURL;
+
+- (UIViewController *)createRootViewController;
+
+@end
+
+NS_ASSUME_NONNULL_END

node_modules/expo-modules-core/ios/ReactDelegates/EXReactDelegateWrapper.mm

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+// Copyright 2018-present 650 Industries. All rights reserved.
+
+#import <ExpoModulesCore/EXReactDelegateWrapper.h>
+#import <ExpoModulesCore/Swift.h>
+
+@interface EXReactDelegateWrapper()
+
+@property (nonatomic, weak) EXReactDelegate *expoReactDelegate;
+
+@end
+
+@implementation EXReactDelegateWrapper
+
+- (instancetype)initWithExpoReactDelegate:(EXReactDelegate *)expoReactDelegate
+{
+  if (self = [super init]) {
+    _expoReactDelegate = expoReactDelegate;
+  }
+  return self;
+}
+
+- (UIView *)createReactRootView:(NSString *)moduleName
+              initialProperties:(nullable NSDictionary *)initialProperties
+                  launchOptions:(nullable NSDictionary *)launchOptions
+{
+  return [_expoReactDelegate createReactRootViewWithModuleName:moduleName
+                                             initialProperties:initialProperties
+                                                 launchOptions:launchOptions];
+}
+
+- (NSURL *)bundleURL
+{
+  return [_expoReactDelegate bundleURL];
+}
+
+- (UIViewController *)createRootViewController
+{
+  return [_expoReactDelegate createRootViewController];
+}
+
+@end

node_modules/expo-modules-core/ios/ReactDelegates/ExpoReactDelegate.swift

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+// Copyright 2018-present 650 Industries. All rights reserved.
+
+/**
+ An extensible react instance creation delegate. This class will loop through each `ExpoReactDelegateHandler` to determine the winner to create the instance.
+ */
+@objc(EXReactDelegate)
+public class ExpoReactDelegate: NSObject {
+  private let handlers: [ExpoReactDelegateHandler]
+  public let reactNativeFactory: ExpoReactNativeFactoryProtocol
+
+  public init(handlers: [ExpoReactDelegateHandler], reactNativeFactory: ExpoReactNativeFactoryProtocol) {
+    self.handlers = handlers
+    self.reactNativeFactory = reactNativeFactory
+  }
+
+  @objc
+  public func createReactRootView(
+    moduleName: String,
+    initialProperties: [AnyHashable: Any]?,
+    launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> UIView {
+    return self.handlers
+      .compactMap { $0.createReactRootView(reactDelegate: self, moduleName: moduleName, initialProperties: initialProperties, launchOptions: launchOptions) }
+      .first(where: { _ in true })
+      ?? {
+      return reactNativeFactory.recreateRootView(withBundleURL: nil, moduleName: moduleName, initialProps: initialProperties, launchOptions: launchOptions)
+    }()
+  }
+
+  @objc
+  public func bundleURL() -> URL? {
+    return self.handlers.lazy
+      .compactMap { $0.bundleURL(reactDelegate: self) }
+      .first(where: { _ in true })
+  }
+
+  @objc
+  public func createRootViewController() -> UIViewController {
+    return self.handlers.lazy
+      .compactMap { $0.createRootViewController() }
+      .first(where: { _ in true }) ?? UIViewController()
+  }
+}

node_modules/expo-modules-core/ios/ReactDelegates/ExpoReactDelegateHandler.swift

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+// Copyright 2018-present 650 Industries. All rights reserved.
+
+/**
+ The handler for `ExpoReactDelegate`. A module can implement a handler to process react instance creation.
+ */
+@objc(EXReactDelegateHandler)
+open class ExpoReactDelegateHandler: NSObject {
+  public override required init() {}
+
+  /**
+   If this module wants to handle React instance and the root view creation, it can return the instance.
+   Otherwise return nil.
+   */
+  @objc
+  open func createReactRootView(
+    reactDelegate: ExpoReactDelegate,
+    moduleName: String,
+    initialProperties: [AnyHashable: Any]?,
+    launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> UIView? {
+    return nil
+  }
+
+  /**
+   Clients could override this getter to serve the latest bundleURL for React instance.
+   For example, expo-updates uses this to serve the newer bundleURL from `Updates.reloadAsync()`.
+   */
+  @objc
+  open func bundleURL(reactDelegate: ExpoReactDelegate) -> URL? {
+    return nil
+  }
+
+  /**
+   If this module wants to handle `UIViewController` creation for `RCTRootView`, it can return the instance.
+   Otherwise return nil.
+   */
+  @objc
+  open func createRootViewController() -> UIViewController? {
+    return nil
+  }
+}