79 lines
3.5 KiB
C#
79 lines
3.5 KiB
C#
using FabApprovalWorkerService.Clients;
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using Microsoft.IdentityModel.Tokens;
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using System.Net.Mail;
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namespace FabApprovalWorkerService.Services;
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public interface ISmtpService {
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Task<bool> SendEmail(IEnumerable<MailAddress> recipients, IEnumerable<MailAddress> ccRecipients, string subject, string body);
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}
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public class SmtpService : ISmtpService {
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private ILogger<SmtpService> _logger;
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private ISmtpClientWrapper _smtpClient;
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private string _environmentName;
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public SmtpService(ILogger<SmtpService> logger, ISmtpClientWrapper smtpClient) {
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_logger = logger ??
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throw new ArgumentNullException("ILogger not injected");
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_smtpClient = smtpClient ??
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throw new ArgumentNullException("SmtpClient not injected");
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_environmentName = Environment.GetEnvironmentVariable("FabApprovalEnvironmentName") ??
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throw new ArgumentNullException("FabApprovalEnvironmentName environment variable not found");
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}
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public async Task<bool> SendEmail(IEnumerable<MailAddress> recipients,
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IEnumerable<MailAddress> ccRecipients,
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string subject,
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string body) {
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if (recipients.IsNullOrEmpty()) throw new ArgumentNullException("recipients cannot be null or empty!");
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if (ccRecipients is null) throw new ArgumentNullException("ccRecipients cannot be null!");
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if (subject.IsNullOrEmpty()) throw new ArgumentNullException("subject cannot be null or empty!");
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if (body.IsNullOrEmpty()) throw new ArgumentNullException("body cannot be null or empty!");
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return await Task.Run(() => {
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int maxRetries = 3;
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int backoffSeconds = 30;
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bool messageWasSent = false;
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try {
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if (!_environmentName.ToLower().Equals("development")) {
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int remainingRetries = maxRetries;
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while (!messageWasSent && remainingRetries > 0) {
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try {
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Task.Delay((maxRetries - remainingRetries--) * backoffSeconds * 1000);
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_logger.LogInformation($"Attempting to send notification. Remaining retries: {remainingRetries}");
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MailMessage msg = new MailMessage();
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msg.IsBodyHtml = true;
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msg.From = new MailAddress("MesaFabApproval@infineon.com", "Mesa Fab Approval");
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msg.Sender = new MailAddress("MesaFabApproval@infineon.com", "Mesa Fab Approval");
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foreach (MailAddress recipient in recipients) msg.To.Add(recipient);
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msg.Bcc.Add("chase.tucker@infineon.com");
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foreach (MailAddress ccRecipient in ccRecipients) msg.CC.Add(ccRecipient);
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msg.Subject = subject;
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msg.Body = body;
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_smtpClient.Send(msg);
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messageWasSent = true;
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} catch (Exception ex) {
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_logger.LogError($"Message not sent successfully. Exception: {ex.Message}");
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}
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}
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} else {
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messageWasSent = true;
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}
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} catch (Exception ex) {
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_logger.LogError($"An exception occurred when attempting to send notification. Exception: {ex.Message}");
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}
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return messageWasSent;
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});
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}
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}
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