Innovenergy_trunk/csharp/Lib/Mailer/Mailer.cs

using System.Diagnostics.CodeAnalysis;
using System.Text.Json;
using MailKit.Net.Smtp;
using MimeKit;

namespace InnovEnergy.Lib.Mailer;


public static class Mailer
{
    [UnconditionalSuppressMessage("Trimming", "IL2026:Members annotated with 'RequiresUnreferencedCodeAttribute' require dynamic access otherwise can break functionality when trimming application code", Justification = "<Pending>")]
    public static async Task Send(String recipientName, String recipientEmailAddress, String subject, String body)
    {
        var config = await ReadMailerConfig();

        var from = new MailboxAddress(config!.SenderName, config.SenderAddress);
        var to   = new MailboxAddress(recipientName, recipientEmailAddress);
        
        var msg  = new MimeMessage
        {
            From    = { from },
            To      = { to },
            Subject = subject,
            Body    = new TextPart { Text = body }
        };

        using var smtp = new SmtpClient();
        
        await smtp.ConnectAsync(config.SmtpServerUrl, config.SmtpPort, false);
        await smtp.AuthenticateAsync(config.SmtpUsername, config.SmtpPassword);
        await smtp.SendAsync(msg);
        await smtp.DisconnectAsync(true);
    }

    [RequiresUnreferencedCode("Calls System.Text.Json.JsonSerializer.DeserializeAsync<TValue>(Stream, JsonSerializerOptions, CancellationToken)")]
    private static async Task<MailerConfig?> ReadMailerConfig()
    {
        await using var fileStream = File.OpenRead(MailerConfig.DefaultFile);
        return await JsonSerializer.DeserializeAsync<MailerConfig>(fileStream);
    }
}