Kotlinify SubtractionAnimatedNode

Differential Revision: D60347765

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/animated/SubtractionAnimatedNode.kt

@@ -0,0 +1,52 @@
+/*
+ * 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.animated
+
+import com.facebook.react.bridge.JSApplicationCausedNativeException
+import com.facebook.react.bridge.ReadableMap
+
+/**
+ * Animated node that plays a role of value aggregator. It takes two or more value nodes as an input
+ * and outputs a difference of values outputted by those nodes.
+ */
+internal class SubtractionAnimatedNode(
+    config: ReadableMap,
+    private val nativeAnimatedNodesManager: NativeAnimatedNodesManager
+) : ValueAnimatedNode() {
+  private val inputNodes: IntArray
+
+  init {
+    val input = config.getArray("input")
+    inputNodes =
+        if (input == null) {
+          IntArray(0)
+        } else {
+          IntArray(input.size()) { i -> input.getInt(i) }
+        }
+  }
+
+  override fun update() {
+    for (i in inputNodes.indices) {
+      val animatedNode = nativeAnimatedNodesManager.getNodeById(inputNodes[i])
+      if (animatedNode != null && animatedNode is ValueAnimatedNode) {
+        val value = animatedNode.getValue()
+        if (i == 0) {
+          nodeValue = value
+        } else {
+          nodeValue -= value
+        }
+      } else {
+        throw JSApplicationCausedNativeException(
+            "Illegal node ID set as an input for Animated.subtract node")
+      }
+    }
+  }
+
+  override fun prettyPrint(): String =
+      "SubtractionAnimatedNode[$tag]: input nodes: $inputNodes - super: ${super.prettyPrint()}"
+}