OvertakingLegend/Packages/com.tuyoogame.yooasset@2.1.1/Runtime/ResourcePackage/Operation/Internal/UnpackBuildinManifestOperation.cs


namespace YooAsset
{
    internal class UnpackBuildinManifestOperation : AsyncOperationBase
    {
        private enum ESteps
        {
            None,
            UnpackManifestHashFile,
            UnpackManifestFile,
            Done,
        }

        private readonly PersistentManager _persistent;
        private readonly string _buildinPackageVersion;
        private UnityWebFileRequester _downloader1;
        private UnityWebFileRequester _downloader2;
        private ESteps _steps = ESteps.None;

        public UnpackBuildinManifestOperation(PersistentManager persistent, string buildinPackageVersion)
        {
            _persistent = persistent;
            _buildinPackageVersion = buildinPackageVersion;
        }
        internal override void InternalOnStart()
        {
            _steps = ESteps.UnpackManifestHashFile;
        }
        internal override void InternalOnUpdate()
        {
            if (_steps == ESteps.None || _steps == ESteps.Done)
                return;

            if (_steps == ESteps.UnpackManifestHashFile)
            {
                if (_downloader1 == null)
                {
                    string savePath = _persistent.GetSandboxPackageHashFilePath(_buildinPackageVersion);
                    string filePath = _persistent.GetBuildinPackageHashFilePath(_buildinPackageVersion);
                    string url = PersistentHelper.ConvertToWWWPath(filePath);
                    _downloader1 = new UnityWebFileRequester();
                    _downloader1.SendRequest(url, savePath);
                }

                if (_downloader1.IsDone() == false)
                    return;

                if (_downloader1.HasError())
                {
                    _steps = ESteps.Done;
                    Status = EOperationStatus.Failed;
                    Error = _downloader1.GetError();
                }
                else
                {
                    _steps = ESteps.UnpackManifestFile;
                }

                _downloader1.Dispose();
            }

            if (_steps == ESteps.UnpackManifestFile)
            {
                if (_downloader2 == null)
                {
                    string savePath = _persistent.GetSandboxPackageManifestFilePath(_buildinPackageVersion);
                    string filePath = _persistent.GetBuildinPackageManifestFilePath(_buildinPackageVersion);
                    string url = PersistentHelper.ConvertToWWWPath(filePath);
                    _downloader2 = new UnityWebFileRequester();
                    _downloader2.SendRequest(url, savePath);
                }

                if (_downloader2.IsDone() == false)
                    return;

                if (_downloader2.HasError())
                {
                    _steps = ESteps.Done;
                    Status = EOperationStatus.Failed;
                    Error = _downloader2.GetError();
                }
                else
                {
                    _steps = ESteps.Done;
                    Status = EOperationStatus.Succeed;
                }

                _downloader2.Dispose();
            }
        }
    }
}