Migrate ViewGroupManager.java to kotlin

Author: riteshshukla04

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewGroupManager.java

@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+package com.facebook.react.uimanager
+
+import android.view.View
+import android.view.ViewGroup
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.UiThreadUtil
+import java.util.*
+
+public abstract class ViewGroupManager<T : ViewGroup>
+@JvmOverloads
+constructor(reactContext: ReactApplicationContext? = null) :
+    BaseViewManager<T, LayoutShadowNode>(reactContext), IViewGroupManager<T> {
+
+    public companion object {
+        private val zIndexHash: WeakHashMap<View, Int> = WeakHashMap()
+
+        @JvmStatic
+        public fun setViewZIndex(view: View, zIndex: Int): Unit = zIndexHash.set(view, zIndex)
+
+        @JvmStatic public fun getViewZIndex(view: View?): Int? = zIndexHash[view]
+    }
+
+    public override fun createShadowNodeInstance(): LayoutShadowNode = LayoutShadowNode()
+
+    public override fun getShadowNodeClass(): Class<out LayoutShadowNode> =
+        LayoutShadowNode::class.java
+
+    public override fun updateExtraData(root: T, extraData: Any) {}
+
+    public override fun addView(parent: T, child: View, index: Int): Unit =
+        parent.addView(child, index)
+
+    /**
+     * Convenience method for batching a set of addView calls Note that this adds the views to the
+     * beginning of the ViewGroup
+     *
+     * @param parent the parent ViewGroup
+     * @param views the set of views to add
+     */
+    public fun addViews(parent: T, views: List<View>) {
+        UiThreadUtil.assertOnUiThread()
+        views.forEachIndexed { i, view -> addView(parent, view, i) }
+    }
+
+    public override fun getChildCount(parent: T): Int = parent.childCount
+
+    public override fun getChildAt(parent: T, index: Int): View? = parent.getChildAt(index)
+
+    public override fun removeViewAt(parent: T, index: Int) {
+        UiThreadUtil.assertOnUiThread()
+        parent.removeViewAt(index)
+    }
+
+    public fun removeView(parent: T, view: View) {
+        UiThreadUtil.assertOnUiThread()
+        for (i in 0 until getChildCount(parent)) {
+            if (getChildAt(parent, i) === view) {
+                removeViewAt(parent, i)
+                break
+            }
+        }
+    }
+
+    public override fun needsCustomLayoutForChildren(): Boolean = false
+}