annotations/Azaion.Common/Services/ResourceLoader.cs

using System.IO;

namespace Azaion.Common.Services;

public interface IResourceLoader
{
    Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default);
}

public class ResourceLoader(string email, string password, AzaionApiClient api, IHardwareService hardwareService) : IResourceLoader
{
    public async Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default)
    {
        var hardwareInfo = await hardwareService.GetHardware();
        var encryptedStream = await api.GetResource(fileName, password, hardwareInfo);

        var key = Security.MakeEncryptionKey(email, password, hardwareInfo.Hash);
        var stream = new MemoryStream();
        await encryptedStream.DecryptTo(stream, key, cancellationToken);
        return stream;
    }
}