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‎ConfgureSetting/IWritableOptionsMail.cs

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using Microsoft.Extensions.Options;
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namespace SimpleEmailApp.ConfgureSetting
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{
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public interface IWritableOptionsMail<out T> : IOptionsSnapshot<T> where T : class, new()
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{
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void Update(Action<T> applyChanges);
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}
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}

‎ConfgureSetting/ServiceCollectionExtensions.cs

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using Microsoft.Extensions.Options;
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namespace SimpleEmailApp.ConfgureSetting
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{
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public static class ServiceCollectionExtensions
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{
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public static void ConfigureWritable<T>(
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this IServiceCollection services,
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IConfigurationSection section,
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string file = "appsettings.json") where T : class, new()
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{
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services.Configure<T>(section);
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services.AddTransient<IWritableOptionsMail<T>>(provider =>
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{
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var configuration = (IConfigurationRoot)provider.GetService<IConfiguration>();
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var environment = provider.GetService<IWebHostEnvironment>();
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var options = provider.GetService<IOptionsSnapshot<T>>();
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return new WritableOptionsMail<T>(environment, options, configuration, section.Key, file);
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});
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}
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}
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}

‎ConfgureSetting/WritableOptionsMail.cs

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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Options;
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using System.Text.Json;
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using System.Text.Json.Nodes;
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namespace SimpleEmailApp.ConfgureSetting
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{
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public class WritableOptionsMail<T> : IWritableOptionsMail<T> where T : class, new()
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{
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//private properties
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private readonly IWebHostEnvironment _environment;
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private readonly IOptionsSnapshot<T> _options;
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private readonly IConfigurationRoot _configuration;
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private readonly string _section;
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private readonly string _file;
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//costructor
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public WritableOptionsMail(IWebHostEnvironment environment, IOptionsSnapshot<T> options, IConfigurationRoot configuration, string section, string file)
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{
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_environment = environment;
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_options = options;
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_configuration = configuration;
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_section = section;
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_file = file;
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}
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//T value for generics type
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public T Value => _options.Value;
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public T Get(string name) => _options.Get(name);
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public void Update(Action<T> applyChanges)
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{
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var fileProvider = _environment.ContentRootFileProvider;
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var fileInfo = fileProvider.GetFileInfo(_file);
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var physicalPath = fileInfo.PhysicalPath;
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var jObject = JsonSerializer.Deserialize<JsonObject>(File.ReadAllText(physicalPath)); //<JObject>(File.ReadAllText(physicalPath));
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if (jObject is null)
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return;
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var sectionObject = jObject.TryGetPropertyValue(_section, out JsonNode? section) ?
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JsonSerializer.Deserialize<T>(section?.ToString()) : (Value ?? new T());
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applyChanges(sectionObject);
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jObject[_section] = JsonObject.Parse(JsonSerializer.Serialize(sectionObject));
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File.WriteAllText(physicalPath, JsonSerializer.Serialize(jObject, new JsonSerializerOptions { WriteIndented = true }));
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_configuration.Reload();
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}
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}
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}

‎Controllers/MailController.cs

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using Microsoft.AspNetCore.Mvc;
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using SimpleEmailApp.CorrelationService;
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using System.Text.Json;
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namespace SimpleEmailApp.Controllers
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{
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[Route("api/[controller]")]
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[ApiController]
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public class MailController : ControllerBase
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{
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private readonly IMailService _mailService;
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private readonly ILogger<MailController> _logger;
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private readonly ICorrelationIdGenerator _correlationIdGenerator;
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public MailController(IMailService mailService, ILogger<MailController> logger,
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ICorrelationIdGenerator correlationIdGenerator)
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{
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_mailService = mailService;
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_logger = logger;
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_correlationIdGenerator = correlationIdGenerator;
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}
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[HttpPost]
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public async Task<IActionResult> SendMail([FromForm] EmailMessage req)
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{
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_logger.LogInformation("..................... Sending Email Function Start.............");
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try
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{
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await _mailService.SendEmailAsync(req);
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_logger.LogInformation("CorrelationId {correlationId}: ",
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_correlationIdGenerator.Get());
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//_logger.LogInformation($" Email {},{req.Reciver},{req.Subject},{req.Body} is send.");
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return Ok($"Email sended to {req.Reciver} sucessfully.");
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}
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catch (Exception)
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{
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return NotFound();
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// _logger.LogError("We have error in sending Email.");
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}
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}
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//public IActionResult SendEmail(string subject , string body , string sender)
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//{
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// var email = new MimeMessage();
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// email.From.Add(MailboxAddress.Parse("anivargudeov@gmail.com"));
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// email.To.Add(MailboxAddress.Parse("anivargudeov@gmail.com"));
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// email.Subject = subject;
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// email.Body =new TextPart(TextFormat.Plain) { Text= body };
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// using var smtp = new SmtpClient();
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// smtp.Connect("smtp.gmail.com", 587,SecureSocketOptions.StartTls);
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// smtp.Authenticate("anivargudeov@gmail.com", "fsobaslupqqlmhtv");
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// smtp.Send(email);
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// smtp.Disconnect(true);
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// return Ok();
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//}
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}
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}

‎Controllers/SMTPConfigurationController.cs

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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using SimpleEmailApp.ConfgureSetting;
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namespace SimpleEmailApp.Controllers
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{
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[Route("api/[controller]")]
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[ApiController]
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public class SMTPConfigurationController : ControllerBase
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{
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private readonly IWritableOptionsMail<AppSetting> _writableMail;
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private readonly ILogger<SMTPConfigurationController> _logger;
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//IWritableOptionsMail<AppSetting> writableMail
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public SMTPConfigurationController(IWritableOptionsMail<AppSetting> writableMail,
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ILogger<SMTPConfigurationController> logger)
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{
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_writableMail = writableMail;
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_logger = logger;
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}
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[HttpPost]
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public IActionResult ConfigureSettings(string SenderMail, string password, string host, int port)
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{
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var setting = new AppSetting()
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{
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Mail = SenderMail,
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Password = password,
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Host = host,
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Port = port
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};
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if (setting == null)
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{
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return BadRequest("you should Enter configuration for SMTP Server");
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}
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try
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{
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_writableMail.Update(opt =>
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{
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opt.Mail = setting.Mail;
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opt.Password = setting.Password;
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opt.Host = setting.Host;
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opt.Port = setting.Port;
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});
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_logger.LogInformation("New SMTP Configuration {setting} is created. ",setting);
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}
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catch(Exception)
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{
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_logger.LogError("SMTP configuration has error.");
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throw;
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}
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// if (_settings != null)
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return Ok("configuration is added into setting .");
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}
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}
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}

‎CorrelationService/CorrelationIdGenerator.cs

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namespace SimpleEmailApp.CorrelationService
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{
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public class CorrelationIdGenerator : ICorrelationIdGenerator
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{
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private string _correlationId = Guid.NewGuid().ToString();
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public string Get() => _correlationId;
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public void Set(string correlationId)
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{
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_correlationId = correlationId;
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}
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}
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}

‎CorrelationService/ICorrelationIdGenerator.cs

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namespace SimpleEmailApp.CorrelationService
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{
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public interface ICorrelationIdGenerator
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{
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string Get();
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void Set(string correlationId);
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}
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}

‎CorrelationService/Middleware/CorrelationIdMiddleware.cs

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using Microsoft.Extensions.Primitives;
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using SimpleEmailApp.CorrelationService;
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namespace SimpleEmailApp.CorrelationService.Middleware
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{
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public class CorrelationIdMiddleware
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{
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private readonly RequestDelegate _next;
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private const string _correlationIdHeader = "X-Correlation-Id";
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public CorrelationIdMiddleware(RequestDelegate next)
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{
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_next = next;
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}
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public async Task Invoke(HttpContext context, ICorrelationIdGenerator correlationIdGenerator)
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{
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var correlationId = GetCorrelationId(context, correlationIdGenerator);
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AddCorrelationIdHeaderToResponse(context, correlationId);
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await _next(context);
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}
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private static StringValues GetCorrelationId(HttpContext context, ICorrelationIdGenerator correlationIdGenerator)
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{
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if (context.Request.Headers.TryGetValue(_correlationIdHeader, out var correlationId))
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{
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correlationIdGenerator.Set(correlationId);
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return correlationId;
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}
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else
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{
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return correlationIdGenerator.Get();
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}
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}
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private static void AddCorrelationIdHeaderToResponse(HttpContext context, StringValues correlationId)
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{
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context.Response.OnStarting(() =>
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{
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context.Response.Headers.Add(_correlationIdHeader, new[] { correlationId.ToString() });
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return Task.CompletedTask;
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});
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}
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}
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}

‎CorrelationService/Service/ApplicationBuilderExtensions.cs

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using SimpleEmailApp.CorrelationService.Middleware;
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namespace SimpleEmailApp.CorrelationService.Service
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{
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public static class ApplicationBuilderExtensions
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{
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public static IApplicationBuilder AddCorrelationIdMiddleware(this IApplicationBuilder applicationBuilder)
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=> applicationBuilder.UseMiddleware<CorrelationIdMiddleware>();
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}
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}

‎Model/AppSetting.cs

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using System.Text.Json;
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namespace SimpleEmailApp.Model
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{
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public class AppSetting
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{
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public string Mail { get; set; } = string.Empty;
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// public string DisplayName { get; set; } = string.Empty;
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public string Password { get; set; } = string.Empty;
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public string Host { get; set; } = string.Empty;
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public int Port { get; set; }
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}
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}

‎Model/EmailMessage.cs

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using Serilog;
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namespace SimpleEmailApp.Model
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{
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public class EmailMessage
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{
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public string Reciver { get; set; } = string.Empty;
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// public string Sender { get; set; } = string.Empty;
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public string Subject { get; set; } = string.Empty;
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public string Body { get; set; } = string.Empty;
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// public List<IFormFile> Attachments { get; set; }
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}
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}

‎Model/EmailMessageLog.cs

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namespace SimpleEmailApp.Model
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{
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public class EmailMessageLog
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{
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public int Id { get; set; }
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public string Reciver { get; set; } = string.Empty;
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public string Sender { get; set; } = string.Empty;
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public string Subject { get; set; } = string.Empty;
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public string Body { get; set; }
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public EmailMessageLog(int id,string recive,string send,string subject, string body)
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{
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Id = id;
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Reciver = recive;
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Sender = send;
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Subject = subject;
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Body = body;
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}
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}
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}

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