marco.pms.api/Marco.Pms.Services/Service/EmailSender.cs

using Marco.Pms.Model.Utilities;
using Microsoft.Extensions.Options;
using MailKit.Net.Smtp;
using MimeKit;


namespace MarcoBMS.Services.Service
{
    public class EmailSender : IEmailSender
    {
        private readonly SmtpSettings _smtpSettings;
        private readonly IConfiguration _configuration;

        public EmailSender(IOptions<SmtpSettings> emailSettings, IConfiguration configuration)
        {
            _smtpSettings = emailSettings.Value;
            _configuration = configuration;
        }

        public async Task<string> GetEmailTemplate(string templateName, Dictionary<string, string> replacements)
        {
            string path = Path.Combine(Directory.GetCurrentDirectory(), "EmailTemplates", $"{templateName}.html");

            if (!File.Exists(path))
                throw new FileNotFoundException("Template file not found");

            string content = await File.ReadAllTextAsync(path);

            foreach (var item in replacements)
            {
                content = content.Replace($"{{{{{item.Key}}}}}", item.Value);
            }

            return content;
        }

        public async Task SendResetPasswordEmailOnRegister(string toEmail, string toName, string resetLink)
        {
            var replacements = new Dictionary<string, string>
            {
                { "MAIL_TITLE", "New registration,Reset Your Password" },
                { "RESET_PWD_URL", resetLink },
                { "RECEIVER_NAME", toName }
            };

            string emailBody = await GetEmailTemplate("new-user-email", replacements);

            await SendEmailAsync(toEmail, "New user registration, Reset Your Password", emailBody);
        }
        public async Task SendResetPasswordEmail(string toEmail, string userName, string resetLink)
        {            
            var replacements = new Dictionary<string, string>
            {
                { "MAIL_TITLE", "Reset Your Password" },
                { "RESET_PWD_URL", resetLink }
            };

            string emailBody = await GetEmailTemplate("forgot-password", replacements);


            await SendEmailAsync(toEmail, "Reset Your Password", emailBody);

        }

        public async Task SendEmailAsync(string toEmail, string subject, string body)
        {
            var email = new MimeMessage();
            email.From.Add(new MailboxAddress(_smtpSettings.SenderName, _smtpSettings.SenderEmail));
            email.To.Add(MailboxAddress.Parse(toEmail));
            email.Subject = subject;

            var bodyBuilder = new BodyBuilder { HtmlBody = body };
            email.Body = bodyBuilder.ToMessageBody();

            using var smtp = new SmtpClient();
            await smtp.ConnectAsync(_smtpSettings.SmtpServer, _smtpSettings.Port, MailKit.Security.SecureSocketOptions.StartTls);
            await smtp.AuthenticateAsync(_smtpSettings.SenderEmail, _smtpSettings.Password);
            await smtp.SendAsync(email);
            await smtp.DisconnectAsync(true);
        }
    }

}