EnvelopeGenerator/EnvelopeGenerator.Infrastructure.Notification/EnvelopeNotificationService.cs

using DigitalData.Core.Abstraction.Application.Repository;
using DigitalData.MessagingService.Application.Common.Interfaces;
using DigitalData.MessagingService.Application.EmailSending.Commands;
using EnvelopeGenerator.Application.Common.Interfaces.Services.Notification;
using EnvelopeGenerator.Domain.Constants;
using EnvelopeGenerator.Domain.Entities;
using EnvelopeGenerator.Domain.Exceptions;
using EnvelopeGenerator.Infrastructure.Notification.Configuration;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;

namespace EnvelopeGenerator.Infrastructure.Notification;

public class EnvelopeNotificationService(IRepository<EmailTemplate> TempRepo, IMessagingServiceClient MsgClient, IOptions<NotificationOptions> ntfOpt) : IEnvelopeNotificationService
{    
    private readonly NotificationOptions NtfOpt = ntfOpt.Value;

    private async Task<EmailTemplate> GetTemplateAsync(EmailTemplateType templateType, CancellationToken cancel = default)
    {
        return await TempRepo.Where(t => t.Name == templateType.ToString()).FirstOrDefaultAsync(cancel)
            ?? throw new DataIntegrityException($"{templateType} email template not found");
    }

    public async Task Notify<TEnvelopeNotificationBase>(string receiverEmail, TEnvelopeNotificationBase notification, CancellationToken cancel = default)
        where TEnvelopeNotificationBase : EnvelopeNotificationBase
    {
        var template = await GetTemplateAsync(notification.GetTemplateType(), cancel);

        // create email command
        var mail = new PublishEmailViaSmtpCommand()
        {
            Body = template.Body.ReplacePlaceholders(notification),
            Subject = template.Subject.ReplacePlaceholders(notification),
            Recipients = [receiverEmail],
            Sender = NtfOpt.SenderEmail.ToSender(),
            IsHtml = true
        };

        // add attachments if any
        if(notification.Attachments?.Any() ?? false)
            mail = mail.WithAttachments(notification.Attachments.ToEmailAttachmentDto());

        await MsgClient.SendAsync(mail, cancel);
    }
}