fix: add missing getPropertyCountAsync/getInstanceCountAsync to new backends

Author: mfazekas

android/src/new/java/com/margelo/nitro/rive/HybridViewModel.kt

@@ -56,6 +56,16 @@ class HybridViewModel(
   override val modelName: String
     get() = viewModelName ?: throw UnsupportedOperationException(NO_NAME_ERROR)
 
+  override fun getPropertyCountAsync(): Promise<Double> {
+    val name = viewModelName ?: return Promise.rejected(UnsupportedOperationException(NO_NAME_ERROR))
+    return Promise.async { riveFile.getViewModelProperties(name).size.toDouble() }
+  }
+
+  override fun getInstanceCountAsync(): Promise<Double> {
+    val name = viewModelName ?: return Promise.rejected(UnsupportedOperationException(NO_NAME_ERROR))
+    return Promise.async { riveFile.getViewModelInstanceNames(name).size.toDouble() }
+  }
+
   // Deprecated: Use createInstanceByNameAsync instead
   override fun createInstanceByIndex(index: Double): HybridViewModelInstanceSpec? {
     val name = viewModelName ?: throw UnsupportedOperationException(NO_NAME_ERROR)

ios/new/HybridViewModel.swift

@@ -32,6 +32,18 @@ class HybridViewModel: HybridViewModelSpec {
     }
   }
 
+  func getPropertyCountAsync() throws -> Promise<Double> {
+    return Promise.async {
+      Double(try await self.file.getProperties(of: self.vmName).count)
+    }
+  }
+
+  func getInstanceCountAsync() throws -> Promise<Double> {
+    return Promise.async {
+      Double(try await self.file.getInstanceNames(of: self.vmName).count)
+    }
+  }
+
   private func createDefaultInstanceImpl() async throws -> (any HybridViewModelInstanceSpec)? {
     let vmi = try await self.file.createViewModelInstance(.viewModelDefault(from: .name(self.vmName)))
     return HybridViewModelInstance(viewModelInstance: vmi, worker: self.worker)