Update newtonsoft and initialize smtp parameters on start

Author: CAPCHIK

azure-pipelines.yml

@@ -55,4 +55,4 @@ stages:
             buildContext: '$(Pipeline.Workspace)/emailservice-build'
             tags: |
               $(Build.BuildId)
-              latest
+              latest

src/Client/Client.csproj

@@ -15,7 +15,11 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Http" Version="2.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PublicAPI\PublicAPI.csproj" />
   </ItemGroup>
 
 </Project>

src/Client/HttpEmailSender.cs

@@ -1,4 +1,5 @@
 using Newtonsoft.Json;
+using RTUITLab.EmailService.PublicAPI.Requests;
 using System;
 using System.Net.Http;
 using System.Text;

src/Client/SendEmailRequest.cs

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>

src/EmailService.LogsViewer/EmailService.LogsViewer.csproj

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.29905.134
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32611.2
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EmailService", "EmailService\EmailService.csproj", "{B5045CB1-D33E-452C-8B1A-A515CBC0CF67}"
 EndProject
@@ -11,7 +11,12 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Client", "Client\Client.csp
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PublicAPI", "PublicAPI\PublicAPI.csproj", "{D092C687-8707-4D0C-AD8A-F4F1FB1718F2}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EmailService.LogsViewer", "EmailService.LogsViewer\EmailService.LogsViewer.csproj", "{5AD09402-E028-4541-B765-9253BE73F3C0}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EmailService.LogsViewer", "EmailService.LogsViewer\EmailService.LogsViewer.csproj", "{5AD09402-E028-4541-B765-9253BE73F3C0}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{80C866E4-6597-41B0-A31A-62778B894901}"
+	ProjectSection(SolutionItems) = preProject
+		..\azure-pipelines.yml = ..\azure-pipelines.yml
+	EndProjectSection
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

src/EmailService.sln

@@ -4,8 +4,8 @@
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Options;
 using MimeKit;
-using Models.Requests;
 using Models.Options;
+using RTUITLab.EmailService.PublicAPI.Requests;
 
 namespace EmailService.Controllers
 {
@@ -19,7 +19,7 @@ public EmailController(IOptions<EmailServiceOptions> emailSenderOptions)
         {
             this.options = emailSenderOptions.Value;
         }
-
+        // TODO: extract send logic to separate service from HTTP Controller
         private async Task<string> SendEmailAsync(string email, string subject, string message)
         {
             MimeMessage mailMessage = new MimeMessage();

src/EmailService/Controllers/EmailController.cs

@@ -0,0 +1,49 @@
+using MailKit.Net.Smtp;
+using MailKit.Security;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using Models.Options;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace EmailService.Services.Initialization
+{
+    public class SmtpOptionsValidator : IHostedService
+    {
+        private readonly IOptions<EmailServiceOptions> emailSenderOptions;
+        private readonly ILogger<SmtpOptionsValidator> logger;
+
+        public SmtpOptionsValidator(
+            IOptions<EmailServiceOptions> emailSenderOptions,
+            ILogger<SmtpOptionsValidator> logger)
+        {
+            this.emailSenderOptions = emailSenderOptions;
+            this.logger = logger;
+        }
+        public async Task StartAsync(CancellationToken cancellationToken)
+        {
+            logger.LogInformation("Checking smtp parameters to {Host} as {Email}", emailSenderOptions.Value.SmtpHost, emailSenderOptions.Value.Email);
+
+            using var client = new SmtpClient();
+            try
+            {
+                await client.ConnectAsync(emailSenderOptions.Value.SmtpHost, emailSenderOptions.Value.SmtpPort, SecureSocketOptions.Auto, cancellationToken);
+                await client.AuthenticateAsync(emailSenderOptions.Value.Email, emailSenderOptions.Value.Password, cancellationToken);
+                await client.DisconnectAsync(true, cancellationToken);
+                logger.LogInformation("SMTP optinos validated successfully");
+            }
+            catch (Exception ex)
+            {
+                logger.LogCritical(ex, "Can't connect to STMP host");
+                throw;
+            }
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            return Task.CompletedTask;
+        }
+    }
+}

src/EmailService/Services/Initialization/SmtpOptionsValidator.cs

@@ -1,4 +1,5 @@
 using EmailService.Middlewares;
+using EmailService.Services.Initialization;
 using EmailService.Services.Logs;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
@@ -25,6 +26,7 @@ public void ConfigureServices(IServiceCollection services)
             services.AddControllers();
 
             services.Configure<EmailServiceOptions>(Configuration.GetSection(nameof(EmailServiceOptions)));
+            services.AddHostedService<SmtpOptionsValidator>();
 
             services.AddSingleton<ILogsWebSocketHandler>(LogsWebSocketHandler.Instance);
         }