EnvelopeGenerator/EnvelopeGenerator.Application/Common/Notifications/DocSigned/Handlers/DocStatusHandler.cs

using EnvelopeGenerator.Application.DocStatus.Commands;
using EnvelopeGenerator.Domain.Constants;
using MediatR;
using System.Text.Json;

namespace EnvelopeGenerator.Application.Common.Notifications.DocSigned.Handlers;

/// <summary>
/// 
/// </summary>
public class DocStatusHandler : INotificationHandler<DocSignedNotification>
{
    private const string BlankAnnotationJson = "{}";

    private readonly ISender _sender;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="sender"></param>
    public DocStatusHandler(ISender sender)
    {
        _sender = sender;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="notification"></param>
    /// <param name="cancel"></param>
    /// <returns></returns>
    public Task Handle(DocSignedNotification notification, CancellationToken cancel) => _sender.Send(new CreateDocStatusCommand()
    {
        EnvelopeId = notification.EnvelopeId,
        ReceiverId = notification.ReceiverId,
        Value = notification.PsPdfKitAnnotation is PsPdfKitAnnotation annot
                    ? JsonSerializer.Serialize(annot.Instant, Format.Json.ForAnnotations)
                    : BlankAnnotationJson
    }, cancel);
}