OSS

Summary: Move UIDebugger plugin to OSS space.

Reviewed By: passy

Differential Revision: D47634848

fbshipit-source-id: 90e8c0181a2434d0e5d76bdb99b902051e6d702e

iOS/Plugins/FlipperKitUIDebuggerPlugin/FlipperKitUIDebuggerPlugin/Observer/UIDTreeObserverFactory.m

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#if FB_SONARKIT_ENABLED
+
+#import "UIDTreeObserverFactory.h"
+#import "UIDUIApplicationObserver.h"
+
+@interface UIDTreeObserverFactory () {
+  NSMutableArray<id<UIDTreeObserverBuilder>>* _builders;
+}
+
+@end
+
+@implementation UIDTreeObserverFactory
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _builders = [NSMutableArray new];
+  }
+  return self;
+}
+
++ (instancetype)shared {
+  static UIDTreeObserverFactory* factory = nil;
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    factory = [UIDTreeObserverFactory new];
+    [factory registerBuilder:[UIDUIApplicationObserverBuilder new]];
+  });
+
+  return factory;
+}
+
+- (void)registerBuilder:(id<UIDTreeObserverBuilder>)builder {
+  [_builders addObject:builder];
+}
+
+- (UIDTreeObserver*)createObserverForNode:(id)node
+                              withContext:(UIDContext*)context {
+  for (id<UIDTreeObserverBuilder> builder in _builders) {
+    if ([builder canBuildFor:node]) {
+      return [builder buildWithContext:context];
+    }
+  }
+  return nil;
+}
+
+- (BOOL)hasObserverForNode:(id)node {
+  for (id<UIDTreeObserverBuilder> builder in _builders) {
+    if ([builder canBuildFor:node]) {
+      return true;
+    }
+  }
+  return false;
+}
+
+@end
+
+#endif