hrynco-notification-service/HrynCo.NotificationService.Worker.Services/EmailProcessing/SmtpEmailSender.cs

namespace HrynCo.NotificationService.Worker.Services.EmailProcessing;

using System.Net;
using System.Net.Mail;
using System.Text;
using HrynCo.NotificationService.DAL.Abstract.Providers;

internal sealed class SmtpEmailSender : ISmtpEmailSender
{
    public async Task SendAsync(
        SmtpChannelSettings settings,
        RenderedEmail email,
        string recipientEmail,
        string recipientName,
        CancellationToken cancellationToken)
    {
        using var client = new SmtpClient(settings.Host, settings.Port)
        {
            EnableSsl = settings.UseSsl,
            Credentials = string.IsNullOrWhiteSpace(settings.Username)
                ? null
                : new NetworkCredential(settings.Username, settings.Password)
        };

        using var mail = new MailMessage
        {
            From = new MailAddress(settings.FromEmail, settings.FromName),
            Subject = email.Subject,
            Body = email.TextBody,
            IsBodyHtml = false,
            BodyEncoding = Encoding.UTF8,
            SubjectEncoding = Encoding.UTF8
        };

        if (!string.IsNullOrWhiteSpace(email.HtmlBody))
        {
            AlternateView html = AlternateView.CreateAlternateViewFromString(
                email.HtmlBody,
                Encoding.UTF8,
                "text/html");
            mail.AlternateViews.Add(html);
        }

        mail.To.Add(new MailAddress(recipientEmail, recipientName));
        await client.SendMailAsync(mail, cancellationToken);
    }
}