riversong-code-showcase/Source/Riversong/Game/EditTools/BuildTool/BuildToolPreviewManager.cs

using Cysharp.Threading.Tasks;
using UnityEngine;

namespace DanieleMarotta.RiversongCodeShowcase
{
    [Service(typeof(IBuildToolPreviewManager))]
    public class BuildToolPreviewManager : GameSystem, IBuildToolPreviewManager
    {
        [InjectService]
        private ITileSpace _tileSpace;

        [InjectService]
        private ISignalBus _signalBus;

        public BuildToolPreviewManager(IServiceLocator serviceLocator) : base(serviceLocator)
        {
        }

        public void PlayPlacementAnimationAndBuild(BuildToolPreview preview, BuildingDefinition definition, TileRect rect, Directions orientation)
        {
            _ = PlayPlacementAnimationAndBuildAsync(preview, definition, rect, orientation);
        }

        private async UniTask PlayPlacementAnimationAndBuildAsync(BuildToolPreview preview, BuildingDefinition definition, TileRect rect, Directions orientation)
        {
            _signalBus.Raise(new BuildingPlacementAnimationStartedSignal(definition, rect, orientation));

            var animatedObject = Object.Instantiate(preview.PreviewObject);

            preview.ClearPreviewObject();

            var placementAnimation = animatedObject.GetComponent<BuildingPlacementAnimation>();
            if (placementAnimation)
            {
                var finalPosition = _tileSpace.GetRectWorldCenter(rect);
                var finalRotation = orientation.ToQuaternion();

                await placementAnimation.PlayAsync(definition, animatedObject.transform.position, finalPosition, finalRotation);
            }
            else
            {
                Debug.LogError($"Prefab '{definition.name}' has no {nameof(BuildingPlacementAnimation)} component");
            }

            _signalBus.Raise(new BuildingPlacementAnimationCompletedSignal(definition, rect, orientation));

            await UniTask.NextFrame();

            Object.Destroy(animatedObject);
        }
    }
}