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[Oo]bj/
[Bb]in/
.nuget/
_ReSharper.*
packages/
artifacts/
*.user
*.suo
*.userprefs
*DS_Store
*.sln.ide
build/docker-compose.yml
build/mongodb/mongodata/
src/Guestbooky/.vs/

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<p align="center">
<a href="" rel="noopener">
<img width=200px height=200px src="docs/guestbooky.png" alt="Guestbooky Project logo"></a>
</p>
<h3 align="center">Guestbooky</h3>
<div align="center">
[![Status](https://img.shields.io/badge/status-active-success.svg)]()
[![GitHub Issues](https://img.shields.io/github/issues/cotti/MessengerPlusSoundBankExtractor.svg)](https://github.com/cotti/MessengerPlusSoundBankExtractor/issues)
[![GitHub Pull Requests](https://img.shields.io/github/issues-pr/cotti/MessengerPlusSoundBankExtractor.svg)](https://github.com/cotti/MessengerPlusSoundBankExtractor/pulls)
[![License](https://img.shields.io/badge/license-AGPLv3-003300.svg)](/LICENSE)
</div>
---
<p align="center">A simple yet somehow overdesigned guestbook system featuring a simple control panel <small>(which is a WIP so you'll have to make do with a db manager)</small></p>
<p align="center"> This is phase I of the personal backscratchers project.</p>
## 📝 Table of Contents
- [About](#about)
- [Getting Started](#getting_started)
- [Deployment](#deployment)
- [Usage](#usage)
- [Built Using](#built_using)
- [Authors](#authors)
## 🧐 About <a name = "about"></a>
I really need to get my hands dirty from time to time, so I figured I'd make a guestbook for my marriage hotsite. And make everyone else see this code.
It includes many concepts that are very reasonable to tinker with as learning material, in a bite-sized project complexity that allows me to talk about it without losing the breadcrumb trail.
## 🏁 Getting Started <a name = "getting_started"></a>
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See [deployment](#deployment) for notes on how to deploy the project on a live system.
### Prerequisites
- .NET 8.0
- A running instance of MongoDB
- A Cloudflare turnstile secret key for the captcha
- Not forget to set up environment variables
You will be able to see in `build/docker-compose.public.yml` that the application makes heavy usage of them.
```
- ASPNETCORE_ENVIRONMENT=Production
- CORS_ORIGINS=https://guestbook.example.com,http://localhost:5008,http://localhost:8080
- ACCESS_USERNAME=user
- ACCESS_PASSWORD=pass
- ACCESS_TOKENKEY=pleaseinsertafairlylargetokenkeyherewillyou
- ACCESS_ISSUER=https://guestbook.example.com/api
- ACCESS_AUDIENCE=https://guestbook.example.com
- CLOUDFLARE_SECRET=0x000000000000000000000000000000000
- MONGODB_CONNECTIONSTRING=mongodb://mongouser:mongopass@mongo:27017/Guestbooky
- MONGODB_DATABASENAME=Guestbooky
```
You will need to set them up either by hand or by using your IDE's capabilities. On Visual Studio, that can be done via the Debug Properties of Guestbooky.API.
**CORS_ORIGINS**, **ACCESS_\*** -> variables related to JWT issuing and checking. In order to use the GET and DELETE endpoints for the messages, you need to use a bearer token.
**CLOUDFLARE_SECRET** -> The turnstile secret, used in the server portion of the captcha check.
**MONGODB_\*** -> Related to the connection to MongoDB. Yeah.
## 🎈 Usage <a name="usage"></a>
For local usage of the backend, you can use `docker-compose.local.yml` and edit the fields you need.
## 🚀 Deployment <a name = "deployment"></a>
Use `docker-compose.public.yml` as a basis. it should create the image for you and start running.
## ⛏️ Built Using <a name = "built_using"></a>
- [MongoDB](https://www.mongodb.com/) - Database
- [.NET](https://dot.net/) - Backend
- [Cloudflare Turnstile](https://www.cloudflare.com/pt-br/products/turnstile/) - Captcha
## ✍️ Authors <a name = "authors"></a>
- [@cotti](https://github.com/cotti) | [cotti.com.br](https://cotti.com.br)

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services:
mongo:
image: mongo
container_name: mongo
restart: always
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: mongo
volumes:
- ./mongodb/mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ro
- ./mongodb/mongod.conf:/etc/mongod.conf:ro
- mongodata:/data/db
command: ["mongod", "--config", "/etc/mongod.conf"]
ports:
- "27017:27017"
mongo-express:
image: mongo-express
container_name: mongo-express
restart: always
ports:
- 8082:8081
environment:
ME_CONFIG_MONGODB_ADMINUSERNAME: root
ME_CONFIG_MONGODB_ADMINPASSWORD: mongo
ME_CONFIG_MONGODB_URL: mongodb://root:mongo@mongo:27017/
ME_CONFIG_BASICAUTH: false
depends_on:
- mongo
volumes:
mongodata:

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services:
guestbooky-be:
build:
context: ../
dockerfile: build/guestbooky-be/Dockerfile
ports:
- "8080:8080"
environment:
- ASPNETCORE_ENVIRONMENT=Production
- CORS_ORIGINS=https://guestbooky.example.com
- ACCESS_USERNAME=user
- ACCESS_PASSWORD=pass
- ACCESS_TOKENKEY=youbetterbesureyouareusingatokenkey
- ACCESS_ISSUER=https://guestbooky.example.com/api
- ACCESS_AUDIENCE=https://guestbooky.example.com
- CLOUDFLARE_SECRET=0x000000000000000000000000000000000
- MONGODB_CONNECTIONSTRING=mongodb://mongouser:mongopass@mongo:27017/Guestbooky
- MONGODB_DATABASENAME=Guestbooky
- LOG_LEVEL=Debug
depends_on:
- mongo
mongo:
image: mongo
container_name: mongo
restart: always
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: mongo
volumes:
- ./mongodb/mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ro
- ./mongodb/mongod.conf:/etc/mongod.conf:ro
- mongodata:/data/db
command: ["mongod", "--config", "/etc/mongod.conf"]
ports:
- "27017:27017"
volumes:
mongodata:

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FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
WORKDIR /app
COPY ../../src/Guestbooky/ .
COPY ../../tests/ .
RUN dotnet restore ./Guestbooky.API/
RUN dotnet build ./Guestbooky.API/Guestbooky.API.csproj -c Release -o /app/build
RUN dotnet publish ./Guestbooky.API/Guestbooky.API.csproj -c Release -o /app/publish
FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS runtime
WORKDIR /app
COPY --from=build /app/publish .
EXPOSE 5008
ENTRYPOINT ["dotnet", "Guestbooky.API.dll"]

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db = db.getSiblingDB('Guestbooky');
db.createUser(
{
user: "guestbookyuser",
pwd: "guestbookypassword",
roles: [
{
role: "readWrite",
db: "Guestbooky"
}
]
}
);
db.createCollection("GuestbookMessages");
db.GuestbookMessages.createIndex({ "Timestamp": 1 });

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net:
bindIp: 0.0.0.0

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using Guestbooky.API.DTOs.Auth;
using Guestbooky.Application.UseCases.AuthenticateUser;
using Guestbooky.Application.UseCases.RefreshToken;
using MediatR;
using Microsoft.AspNetCore.Mvc;
namespace Guestbooky.API.Controllers;
[ApiController]
[Route("[controller]")]
public class AuthController : ControllerBase
{
private readonly IMediator _mediator;
private readonly ILogger<AuthController> _logger;
public AuthController(IMediator mediator, ILogger<AuthController> logger)
{
_mediator = mediator;
_logger = logger;
}
[ProducesResponseType(typeof(LoginResponseDto), 200)]
[ProducesResponseType(StatusCodes.Status400BadRequest)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
[ProducesResponseType(typeof(ProblemDetails),StatusCodes.Status500InternalServerError)]
[HttpPost("login")]
public async Task<IActionResult> Login([FromBody] LoginRequestDto request, CancellationToken token)
{
try
{
_logger.LogInformation("Login request endpoint reached. Sending command.");
var command = new AuthenticateUserCommand(request.Username, request.Password);
var result = await _mediator.Send(command, token);
if(result.IsAuthenticated)
{
_logger.LogInformation("Authentication successful. Returning LoginResponse.");
return Ok(new LoginResponseDto(result.Token, result.RefreshToken));
}
else
{
_logger.LogInformation("Authentication processed, but credentials did not match.");
return Unauthorized();
}
}
catch (Exception e)
{
_logger.LogError(e, "An exception occurred upon trying to login. Returning server error.");
return Problem($"An error occurred on the server: {e.Message}", statusCode: StatusCodes.Status500InternalServerError);
}
}
[ProducesResponseType(typeof(RefreshTokenResponseDto), StatusCodes.Status200OK)]
[ProducesResponseType(StatusCodes.Status400BadRequest)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
[ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status500InternalServerError)]
[HttpPost("refreshtoken")]
public async Task<IActionResult> RefreshToken([FromBody] RefreshTokenRequestDto request, CancellationToken token)
{
try
{
_logger.LogInformation("Refresh token endpoint reached. Sending command.");
var command = new RefreshTokenCommand(request.RefreshToken);
var result = await _mediator.Send(command, token);
if (result.Success)
{
_logger.LogInformation("Refresh token request successful.");
return Ok(new RefreshTokenResponseDto(result.Token, result.RefreshToken));
}
else
{
_logger.LogInformation($"Refresh token request failed. Reason: {result.ErrorMessage}");
return Unauthorized(new ProblemDetails() { Detail = result.ErrorMessage, Title = "Refresh token failed" });
}
}
catch (Exception e)
{
_logger.LogError(e, "An exception occurred upon trying to refresh the token. Returning server error.");
return Problem($"An error occurred on the server: {e.Message}", statusCode: StatusCodes.Status500InternalServerError);
}
}
}

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using Guestbooky.API.DTOs.Messages;
using Guestbooky.Application.UseCases.CountGuestbookMessages;
using Guestbooky.Application.UseCases.DeleteGuestbookMessage;
using Guestbooky.Application.UseCases.InsertGuestMessage;
using Guestbooky.Application.UseCases.ListGuestbookMessages;
using MediatR;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
namespace Guestbooky.API.Controllers;
[ApiController]
[Route("[controller]")]
public class MessageController : ControllerBase
{
private readonly IMediator _mediator;
private readonly ILogger<MessageController> _logger;
public MessageController(IMediator mediator, ILogger<MessageController> logger)
{
_mediator = mediator;
_logger = logger;
}
[HttpPost]
[ProducesResponseType(StatusCodes.Status201Created)]
[ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status403Forbidden)]
[ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status500InternalServerError)]
public async Task<IActionResult> Insert([FromBody] InsertMessageRequestDto message, CancellationToken token)
{
try
{
_logger.LogInformation("Add guestbook message endpoint reached. Sending command.");
var result = await _mediator.Send(new InsertGuestbookMessageCommand(message.Author, message.Message, message.CaptchaResponse), token);
if (result.Success) return Created();
else
{
_logger.LogError($"It wasn't possible to add the message. Reason: {result.ErrorMessage}");
return Problem(result.ErrorMessage, statusCode: StatusCodes.Status403Forbidden);
}
}
catch (Exception e)
{
_logger.LogError(e, "An exception occurred upon trying to insert new guestbook entry. Returning server error.");
return Problem($"An error occurred on the server: {e.Message}", statusCode: StatusCodes.Status500InternalServerError);
}
}
[HttpGet]
[Authorize]
[ProducesResponseType(typeof(IEnumerable<GetMessagesResponseDto>), StatusCodes.Status206PartialContent)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
[ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status416RequestedRangeNotSatisfiable)]
[ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status500InternalServerError)]
public async Task<ActionResult> Get([FromHeader(Name = "Range")] GetMessagesRequestDto request, CancellationToken token)
{
try
{
_logger.LogInformation("List guestbook messages endpoint reached. Sending command.");
var query = new ListGuestbookMessagesQuery(request.Offset);
var queryResult = await _mediator.Send(query, token);
var responseResult = queryResult.Messages.Select(message => new GetMessagesResponseDto(message.Id, message.Author, message.Message, message.Timestamp));
var totalMessages = await GetMessagesTotalAmount(token);
Response.Headers.AcceptRanges = "messages";
Response.Headers.ContentRange = $"messages {request.Offset}-{request.Offset + responseResult.Count() - 1}/{totalMessages}";
Response.StatusCode = StatusCodes.Status206PartialContent;
return new ObjectResult(responseResult);
}
catch (Exception e)
{
_logger.LogError(e, "An exception occurred upon trying to acquire the guestbook entries. Returning server error.");
return Problem($"An error occurred on the server: {e.Message}", statusCode: StatusCodes.Status500InternalServerError);
}
}
[HttpDelete]
[Authorize]
[ProducesResponseType(StatusCodes.Status200OK)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
[ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status500InternalServerError)]
public async Task<IActionResult> Delete([FromBody] DeleteMessageRequestDto message, CancellationToken token)
{
try
{
_logger.LogInformation("Delete guestbook message endpoint reached. Sending command.");
var result = await _mediator.Send(new DeleteGuestbookMessageCommand(message.Id), token);
if (result.Success)
{
_logger.LogInformation("Deletion successful. Returning Ok.");
return Ok();
}
else
{
_logger.LogError($"An issue occurred upon trying to delete the message. Returning server error.");
return Problem($"Could not delete the guestbook entry.", statusCode: StatusCodes.Status500InternalServerError);
}
}
catch (Exception e)
{
_logger.LogError(e, "An exception occurred upon trying to delete a guestbook entry. Returning server error.");
return Problem($"An error occurred on the server: {e.Message}", statusCode: StatusCodes.Status500InternalServerError);
}
}
private async Task<long> GetMessagesTotalAmount(CancellationToken cancellationToken)
{
var query = new CountGuestbookMessagesQuery();
var queryResult = await _mediator.Send(query, cancellationToken);
return queryResult.Amount;
}
}

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namespace Guestbooky.API.DTOs.Auth;
public record LoginRequestDto(string Username, string Password);
public record LoginResponseDto(string Token, string RefreshToken);

5
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namespace Guestbooky.API.DTOs.Auth;
public record RefreshTokenRequestDto(string RefreshToken);
public record RefreshTokenResponseDto(string Token, string RefreshToken);

9
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using System.Text.Json.Serialization;
namespace Guestbooky.API.DTOs.Messages;
public record DeleteMessageRequestDto
{
[JsonPropertyName("Id")]
public required string Id { get; init; }
}

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using Microsoft.AspNetCore.Mvc;
using Swashbuckle.AspNetCore.Annotations;
using System.ComponentModel.DataAnnotations;
using System.Net.Http.Headers;
using System.Text.Json.Serialization;
namespace Guestbooky.API.DTOs.Messages;
[SwaggerSchema("asd", Format = "string", Description = "Optional Range header (e.g., 'messages=1-50')")]
[SwaggerSubType(typeof(string))]
public record GetMessagesRequestDto
{
[FromHeader(Name = "Range")]
public required RangeHeaderValue Range { get; init; }
public string Unit => Range?.Unit ?? string.Empty;
public long Offset => Range?.Ranges.FirstOrDefault()?.From ?? 0;
}
public record GetMessagesResponseDto(string Id, string Author, string Message, DateTimeOffset Timestamp);

22
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using System.ComponentModel.DataAnnotations;
using System.Text.Json.Serialization;
namespace Guestbooky.API.DTOs.Messages;
public record InsertMessageRequestDto
{
[JsonPropertyName("author")]
[Required(ErrorMessage = "The author field is required")]
[StringLength(200, ErrorMessage = "Author cannot be longer than 200 characters")]
public string Author { get; init; }
[JsonPropertyName("message")]
[Required(AllowEmptyStrings = false, ErrorMessage = "The message field is required")]
[StringLength(4096, ErrorMessage = "Author cannot be longer than 4096 characters")]
public string Message { get; init; }
[JsonPropertyName("captchaResponse")]
[Required(ErrorMessage = "The captcha challenge response is required")]
[StringLength(1024)]
public string CaptchaResponse { get; init; }
}

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<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<Nullable>enable</Nullable>
<ImplicitUsings>enable</ImplicitUsings>
<PackageLicenseExpression>AGPL-3.0-or-later</PackageLicenseExpression>
<PackageLicenseFile>..\..\..\LICENSE</PackageLicenseFile>
<Authors>Felipe Cotti</Authors>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.8" />
<PackageReference Include="Serilog" Version="4.0.1" />
<PackageReference Include="Serilog.AspNetCore" Version="8.0.2" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
<PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="6.8.1" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\Guestbooky.Application\Guestbooky.Application.csproj" />
<ProjectReference Include="..\Guestbooky.Infrastructure\Guestbooky.Infrastructure.csproj" />
</ItemGroup>
</Project>

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using Guestbooky.Application.DependencyInjection;
using Guestbooky.Infrastructure.DependencyInjection;
using Guestbooky.Infrastructure.Environment;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using Serilog;
using Guestbooky.API.Validations;
namespace Guestbooky.API
{
public static class Program
{
public static async Task Main(string[] args)
{
var builder = WebApplication.CreateBuilder(args);
await builder.AddLogging();
if (!ValidateEnvironment(builder.Configuration))
return;
await builder.AddServices();
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseCors("local");
app.UseHttpsRedirection();
app.UseAuthentication();
app.UseAuthorization();
app.MapControllers();
await app.RunAsync();
}
private static ValueTask AddLogging(this WebApplicationBuilder builder)
{
builder.Host.UseSerilog((context, conf) =>
{
conf.UseLogLevel(builder.Configuration[Constants.LOG_LEVEL]!.ToUpper());
conf.WriteTo.Console();
conf.ReadFrom.Configuration(context.Configuration);
conf.MinimumLevel.Debug();
conf.Enrich.AtLevel(Serilog.Events.LogEventLevel.Debug, enricher =>
{
enricher.FromLogContext();
});
});
return ValueTask.CompletedTask;
}
/// <summary>
/// Upon checking we have all variables we need, perform the necessary injections. <br />
/// -> <![CDATA[CORS]]> is defined to accept requests from the specified origins <br />
/// -> ASP.NET Controllers are added <br />
/// -> JWT Authentication is set up <br />
/// -> The Infrastructure and Application layers are added <br />
/// -> If we're in development, we add OpenAPI support.
/// </summary>
private static ValueTask AddServices(this WebApplicationBuilder builder)
{
builder.Services.AddCors(cfg =>
{
var corsOrigins = builder.Configuration[Constants.CORS_ORIGINS]?.Split(',') ?? Array.Empty<string>();
cfg.AddPolicy(name: "local", policy =>
{
policy.WithOrigins(corsOrigins);
policy.AllowAnyHeader();
policy.AllowAnyMethod();
});
});
builder.Services.AddControllers().ConfigureApiBehaviorOptions(options =>
{
options.InvalidModelStateResponseFactory = InvalidModelStateResponseFactory.DefaultInvalidModelStateResponse;
});
builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
.AddJwtBearer(o =>
{
o.RequireHttpsMetadata = false;
o.SaveToken = true;
o.TokenValidationParameters = new()
{
ValidIssuer = builder.Configuration[Constants.ACCESS_ISSUER],
ValidAudience = builder.Configuration[Constants.ACCESS_AUDIENCE],
ValidateIssuerSigningKey = true,
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(builder.Configuration[Constants.ACCESS_TOKENKEY]!)),
ValidateIssuer = true,
ValidateAudience = true,
ValidateLifetime = true,
ClockSkew = TimeSpan.Zero
};
});
builder.Services.AddInfrastructure(builder.Configuration);
builder.Services.AddApplication();
if (builder.Environment.IsDevelopment())
{
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(o =>
{
o.EnableAnnotations();
var jwtSecurityScheme = new Microsoft.OpenApi.Models.OpenApiSecurityScheme()
{
BearerFormat = "JWT",
Scheme = JwtBearerDefaults.AuthenticationScheme,
In = Microsoft.OpenApi.Models.ParameterLocation.Header,
Description = "Please add the bearer token",
Name = "JWT Authentication",
Type = Microsoft.OpenApi.Models.SecuritySchemeType.Http,
Reference = new()
{
Id = JwtBearerDefaults.AuthenticationScheme,
Type = Microsoft.OpenApi.Models.ReferenceType.SecurityScheme
}
};
o.AddSecurityDefinition("Bearer", jwtSecurityScheme);
o.AddSecurityRequirement(new()
{
{ jwtSecurityScheme, Array.Empty<string>() }
});
});
}
return ValueTask.CompletedTask;
}
/// <summary>
/// There's little to do if we don't have all the information we're supposed to use, so let's validate and fail early if needed.
/// </summary>
private static bool ValidateEnvironment(IConfiguration configuration)
{
if (configuration == null) return false;
bool validConfig = true;
foreach (var constant in Constants.GetAllConstantKeys().Where(constant => string.IsNullOrWhiteSpace(configuration[constant])))
{
Console.WriteLine($"Environment variable not found: {constant}");
validConfig = false;
}
return validConfig;
}
/// <summary>
/// Helper for the log configuration from environment variables.
/// </summary>
private static LoggerConfiguration UseLogLevel(this LoggerConfiguration conf, string level) => level.ToUpper() switch
{
"TRACE" => conf.MinimumLevel.Verbose(),
"DEBUG" => conf.MinimumLevel.Debug(),
"INFO" => conf.MinimumLevel.Information(),
"WARN" => conf.MinimumLevel.Warning(),
"ERROR" => conf.MinimumLevel.Error(),
_ => conf.MinimumLevel.Information()
};
}
}

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{
"profiles": {
"http": {
"commandName": "Project",
"launchBrowser": true,
"launchUrl": "swagger",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development",
"ACCESS_USERNAME": "testy",
"ACCESS_PASSWORD": "tester",
"ACCESS_TOKENKEY": "youbetterbesureyouareusingatokenkey",
"ACCESS_ISSUER": "https://casorio.cotti.com.br/livro/api",
"ACCESS_AUDIENCE": "https://casorio.cotti.com.br/livro",
"CLOUDFLARE_SECRET": "0x4AAAAAAAiNCjAYE4Eeu1MIjSiHufs-2n0",
"MONGODB_CONNECTIONSTRING": "mongodb://guestbookyuser:guestbookypassword@localhost:27017/Guestbooky",
"MONGODB_DATABASENAME": "Guestbooky",
"CORS_ORIGINS": "https://casorio.cotti.com.br,http://localhost:8080,http://localhost:5008",
"LOG_LEVEL": "DEBUG"
},
"dotnetRunMessages": true,
"applicationUrl": "http://localhost:5008"
},
"https": {
"commandName": "Project",
"launchBrowser": true,
"launchUrl": "swagger",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"dotnetRunMessages": true,
"applicationUrl": "https://localhost:7196;http://localhost:5008"
},
"IIS Express": {
"commandName": "IISExpress",
"launchBrowser": true,
"launchUrl": "swagger",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
}
},
"$schema": "http://json.schemastore.org/launchsettings.json",
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:4774",
"sslPort": 44307
}
}
}

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using Microsoft.AspNetCore.Mvc;
namespace Guestbooky.API.Validations;
public static class InvalidModelStateResponseFactory
{
public static IActionResult DefaultInvalidModelStateResponse(ActionContext context)
{
var problemDetails = new ValidationProblemDetails(context.ModelState)
{
Type = "https://tools.ietf.org/html/rfc9110#section-15.5.1",
Title = "One or more model validation errors occurred.",
Detail = "See the errors property for details",
Instance = context.HttpContext.Request.Path
};
problemDetails.Extensions.Add("traceId", context.HttpContext.TraceIdentifier);
var rangeHeaderError = context.ModelState.FirstOrDefault(ms => ms.Key == "Range.Range" && ms.Value.Errors.Count > 0);
if (rangeHeaderError.Key != null)
{
if (rangeHeaderError.Value.Errors.Any(x => x.ErrorMessage.Contains("is not valid for Range.")))
{
// Return a 416 status code if a RangeHeaderValue-related error is found
return new ObjectResult(problemDetails)
{
StatusCode = StatusCodes.Status416RequestedRangeNotSatisfiable,
ContentTypes = { "application/problem+json" }
};
}
else return null!;
}
return new ObjectResult(problemDetails)
{
StatusCode = StatusCodes.Status400BadRequest,
ContentTypes = { "application/problem+json" }
};
}
}

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src/Guestbooky/Guestbooky.Application/Behaviors/ValidationBehavior.cs Normal file
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using FluentValidation;
using MediatR;
namespace Guestbooky.Application.Behaviors;
/// <summary>
/// This class provides a concrete implementation of the <see cref="IPipelineBehavior{T,K}"/> interface from MediatR.
/// Clear enough, of course, but what for?
/// <para/>
/// When you want to have some sort of validation of a Command's parameters, in order to avoid doing that
/// in <c>Handle()</c>, you build plumbing that does the happy path and the... other paths, for you.
/// <para/>
/// Isn't it nice? Yes. Isn't it also a hefty dose of over-engineering for a pretty small project? Yes, it is!
/// <para/>
/// But let's not lose track of the personal backscratcher ethos. We're here to show and learn too.
/// <para/>
/// When a command pops up, this <see cref="IPipelineBehavior{T,K}"/> will act as a middleware, or filter in .NET lingo.
/// It will be loaded with any <see cref="IValidator"/> found during initialization, and it will search for an <see cref="IValidator"/>
/// for that <typeparamref name="TRequest"/>.
/// <para/>
/// (You will notice I'm actually using FluentValidation's <see cref="AbstractValidator{T}"/>, instead of implementing <see cref="IValidator"/>;
/// It helped quite a bit and looks rather nice. It is also over-engineering.)
/// <para/>
/// Then, if it finds any validation errors, it throws a <see cref="ValidationException"/>. Else, the pipeline goes on.
/// <para/>
/// The catch here is that something should catch it. in order to keep the presentation layer clean from Application layer behavior like this,
/// we can set up an <see cref="MediatR.Pipeline.IRequestExceptionHandler{TCommand,TResult,TException}"/> that will join the plumbing to continue handling
/// from the point the exception occurs, and more refined treatment can be implemented then.
/// <para/>
/// That was a trip to figure out from scratch. But it is pretty interesting.
/// </summary>
public class ValidationBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
where TRequest : IRequest<TResponse>
{
private readonly IEnumerable<IValidator<TRequest>> _validators;
public ValidationBehavior(IEnumerable<IValidator<TRequest>> validators)
{
_validators = validators;
}
public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
{
if (!_validators.Any())
{
return await next();
}
var context = new ValidationContext<TRequest>(request);
var validationResults = await Task.WhenAll(_validators.Select(v => v.ValidateAsync(context, cancellationToken)));
var failures = validationResults.SelectMany(r => r.Errors).Where(f => f is not null).ToArray();
if (failures.Length != 0)
{
throw new ValidationException(failures);
}
return await next();
}
}

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src/Guestbooky/Guestbooky.Application/DependencyInjection/DependencyInjection.cs Normal file
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using FluentValidation;
using Guestbooky.Application.Behaviors;
using MediatR;
using Microsoft.Extensions.DependencyInjection;
namespace Guestbooky.Application.DependencyInjection;
public static class DependencyInjection
{
public static IServiceCollection AddApplication(this IServiceCollection services)
{
services.AddMediatR(cfg => cfg.RegisterServicesFromAssembly(typeof(DependencyInjection).Assembly));
services.AddValidatorsFromAssembly(typeof(DependencyInjection).Assembly);
services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ValidationBehavior<,>));
return services;
}
}

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src/Guestbooky/Guestbooky.Application/Guestbooky.Application.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<PackageLicenseExpression>AGPL-3.0-or-later</PackageLicenseExpression>
<PackageLicenseFile>..\..\..\LICENSE</PackageLicenseFile>
<Authors>Felipe Cotti</Authors>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.2" />
<PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="11.9.2" />
<PackageReference Include="MediatR" Version="12.4.0" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\Guestbooky.Domain\Guestbooky.Domain.csproj" />
</ItemGroup>
</Project>

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src/Guestbooky/Guestbooky.Application/Interfaces/ICaptchaVerifier.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Application.Interfaces
{
public interface ICaptchaVerifier
{
public Task<bool> VerifyAsync(string challengeResponse, CancellationToken cancellationToken);
}
}

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src/Guestbooky/Guestbooky.Application/Interfaces/IJwtTokenService.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Application.Interfaces;
public interface IJwtTokenService
{
string GenerateToken(string username);
}

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src/Guestbooky/Guestbooky.Application/Interfaces/IPasswordHasher.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Application.Interfaces;
public interface IPasswordHasher
{
string HashPassword(string password);
bool VerifyPassword(string password, string passwordHash);
}

15
src/Guestbooky/Guestbooky.Application/Interfaces/IRefreshTokenService.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Application.Interfaces;
public interface IRefreshTokenService
{
string GenerateRefreshToken();
ClaimsPrincipal ValidateRefreshToken(string refreshToken);
void SaveRefreshToken(string username, string refreshToken);
}

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src/Guestbooky/Guestbooky.Application/UseCases/AuthenticateUser/AuthenticateUserCommand.cs Normal file
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using Guestbooky.Application.Interfaces;
using Guestbooky.Domain.Abstractions.Infrastructure;
using MediatR;
namespace Guestbooky.Application.UseCases.AuthenticateUser;
#region Types
public record AuthenticateUserCommand(string Username, string Password) : IRequest<AuthenticateUserResult>;
public record AuthenticateUserResult(bool IsAuthenticated, string Token, string RefreshToken);
#endregion
public class AuthenticateUserCommandHandler : IRequestHandler<AuthenticateUserCommand, AuthenticateUserResult>
{
private readonly IPasswordHasher _passwordHasher;
private readonly IUserCredentialsProvider _userCredentialsProvider;
private readonly IJwtTokenService _tokenGenerator;
private readonly IRefreshTokenService _refreshTokenService;
public AuthenticateUserCommandHandler(IPasswordHasher passwordHasher, IJwtTokenService tokenGenerator, IUserCredentialsProvider userCredentialsProvider, IRefreshTokenService refreshTokenService)
{
_passwordHasher = passwordHasher;
_tokenGenerator = tokenGenerator;
_userCredentialsProvider = userCredentialsProvider;
_refreshTokenService = refreshTokenService;
}
public Task<AuthenticateUserResult> Handle(AuthenticateUserCommand request, CancellationToken cancellationToken)
{
var user = _userCredentialsProvider.GetCredentials();
if (request.Username != _userCredentialsProvider.GetCredentials().Username || !_passwordHasher.VerifyPassword(request.Password, user.PasswordHash))
{
return Task.FromResult(new AuthenticateUserResult(false, string.Empty, string.Empty));
}
var token = _tokenGenerator.GenerateToken(request.Username);
var refreshToken = _refreshTokenService.GenerateRefreshToken();
_refreshTokenService.SaveRefreshToken(request.Username, refreshToken);
return Task.FromResult(new AuthenticateUserResult(true, token, refreshToken));
}
}

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src/Guestbooky/Guestbooky.Application/UseCases/CountGuestbookMessages/CountGuestbookMessagesQuery.cs Normal file
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using Guestbooky.Domain.Abstractions.Repositories;
using MediatR;
namespace Guestbooky.Application.UseCases.CountGuestbookMessages;
#region Types
public record CountGuestbookMessagesQuery() : IRequest<CountGuestbookMessagesQueryResult>;
public record CountGuestbookMessagesQueryResult(long Amount);
#endregion
public class CountGuestbookMessagesQueryHandler : IRequestHandler<CountGuestbookMessagesQuery, CountGuestbookMessagesQueryResult>
{
private readonly IGuestbookMessageRepository _repository;
public CountGuestbookMessagesQueryHandler(IGuestbookMessageRepository repository)
{
_repository = repository;
}
public async Task<CountGuestbookMessagesQueryResult> Handle(
CountGuestbookMessagesQuery request,
CancellationToken cancellationToken)
{
var messageAmount = await _repository.CountAsync(cancellationToken);
return new CountGuestbookMessagesQueryResult(messageAmount);
}
}

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src/Guestbooky/Guestbooky.Application/UseCases/DeleteGuestbookMessage/DeleteGuestbookMessageCommand.cs Normal file
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using Guestbooky.Domain.Abstractions.Repositories;
using MediatR;
namespace Guestbooky.Application.UseCases.DeleteGuestbookMessage;
#region Types
public record DeleteGuestbookMessageCommand(string Id) : IRequest<DeleteGuestbookMessageResult>;
public record DeleteGuestbookMessageResult(bool Success);
#endregion
public class DeleteGuestbookMessageCommandHandler : IRequestHandler<DeleteGuestbookMessageCommand, DeleteGuestbookMessageResult>
{
private readonly IGuestbookMessageRepository _guestbookMessageRepository;
public DeleteGuestbookMessageCommandHandler(IGuestbookMessageRepository guestbookMessageRepository)
{
_guestbookMessageRepository = guestbookMessageRepository;
}
public async Task<DeleteGuestbookMessageResult> Handle(DeleteGuestbookMessageCommand request, CancellationToken cancellationToken)
{
var result = await _guestbookMessageRepository.DeleteAsync(request.Id, cancellationToken);
return new DeleteGuestbookMessageResult(result);
}
}

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src/Guestbooky/Guestbooky.Application/UseCases/InsertGuestbookMessage/InsertGuestbookMessageCommand.cs Normal file
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using FluentValidation;
using Guestbooky.Application.Interfaces;
using Guestbooky.Domain.Abstractions.Repositories;
using Guestbooky.Domain.Entities.Message;
using MediatR;
using MediatR.Pipeline;
namespace Guestbooky.Application.UseCases.InsertGuestMessage;
#region Types
public record InsertGuestbookMessageCommand(string Author, string Message, string CaptchaResponse) : IRequest<InsertGuestbookMessageResult>;
public record InsertGuestbookMessageResult(bool Success, string? ErrorMessage);
#endregion
public class InsertGuestbookMessageCommandHandler : IRequestHandler<InsertGuestbookMessageCommand, InsertGuestbookMessageResult>
{
private readonly IGuestbookMessageRepository _guestbookMessageRepository;
public InsertGuestbookMessageCommandHandler(IGuestbookMessageRepository guestbookMessageRepository)
{
_guestbookMessageRepository = guestbookMessageRepository;
}
public async Task<InsertGuestbookMessageResult> Handle(InsertGuestbookMessageCommand request, CancellationToken cancellationToken)
{
var newMessage = GuestbookMessage.Create(request.Author, request.Message);
await _guestbookMessageRepository.AddAsync(newMessage, cancellationToken);
return new InsertGuestbookMessageResult(true, string.Empty);
}
}
#region Validation
/// <summary>
/// Oh, this is where the interesting tidbit from the summary in <seealso cref="Behaviors.ValidationBehavior{T,U}"/> is.
/// <para/>
/// This class inherits from FluentValidation's <see cref="AbstractValidator{T}"/>, so all that's needed is to write the rules
/// in the constructor. Very neat.
/// <para/>
/// This guarantees we have independent layers helping keep integrity on the (rather anemic) domain model.
/// Of course, there are improvements here and there we can think about.
/// If a rule fails here, we drop further below in this source file, to <seealso cref="InsertGuestbookMessageCommandExceptionHandler"/>.
/// </summary>
public class InsertGuestbookMessageCommandValidator : AbstractValidator<InsertGuestbookMessageCommand>
{
private readonly ICaptchaVerifier _captchaVerifier;
public InsertGuestbookMessageCommandValidator(ICaptchaVerifier captchaVerifier)
{
_captchaVerifier = captchaVerifier;
RuleFor(x => x.Author)
.NotEmpty().WithMessage("An author is required.")
.MaximumLength(200).WithMessage("The author field should not exceed 200 characters.");
RuleFor(x => x.Message)
.NotEmpty().WithMessage("A message is required.")
.MaximumLength(4096).WithMessage("The message field should not exceed 4096 characters.");
RuleFor(x => x.CaptchaResponse)
.NotEmpty().WithMessage("A captcha response must be sent with the payload.")
.MustAsync(async (captchaResponse, cancellationToken) => await _captchaVerifier.VerifyAsync(captchaResponse, cancellationToken))
.WithMessage("The captcha challenge response was not accepted.");
}
}
public class InsertGuestbookMessageCommandExceptionHandler : IRequestExceptionHandler<InsertGuestbookMessageCommand, InsertGuestbookMessageResult, ValidationException>
{
public Task Handle(InsertGuestbookMessageCommand request, ValidationException exception, RequestExceptionHandlerState<InsertGuestbookMessageResult> state, CancellationToken cancellationToken)
{
state.SetHandled(new InsertGuestbookMessageResult(false, string.Join(' ', exception.Errors)));
return Task.CompletedTask;
}
}
#endregion

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src/Guestbooky/Guestbooky.Application/UseCases/ListGuestbookMessages/ListGuestbookMessagesQuery.cs Normal file
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using Guestbooky.Domain.Abstractions.Repositories;
using Guestbooky.Domain.Entities.Message;
using MediatR;
namespace Guestbooky.Application.UseCases.ListGuestbookMessages;
#region Types
public record ListGuestbookMessagesQuery(long Offset) : IRequest<ListGuestbookMessagesQueryResult>;
public record GuestbookMessageQueryResult(string Id, string Author, string Message, DateTimeOffset Timestamp);
public record ListGuestbookMessagesQueryResult(IEnumerable<GuestbookMessageQueryResult> Messages);
#endregion
public class ListGuestbookMessagesQueryHandler : IRequestHandler<ListGuestbookMessagesQuery, ListGuestbookMessagesQueryResult>
{
private readonly IGuestbookMessageRepository _repository;
public ListGuestbookMessagesQueryHandler(IGuestbookMessageRepository repository)
{
_repository = repository;
}
public async Task<ListGuestbookMessagesQueryResult> Handle(
ListGuestbookMessagesQuery request,
CancellationToken cancellationToken)
{
var messages = await _repository.GetAsync(request.Offset, cancellationToken);
var queryResult = new ListGuestbookMessagesQueryResult(messages.Select(m => new GuestbookMessageQueryResult(m.Id.ToString(), m.Author!, m.Message!, m.Timestamp)));
return queryResult;
}
}

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src/Guestbooky/Guestbooky.Application/UseCases/RefreshToken/RefreshTokenCommand.cs Normal file
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using Guestbooky.Application.Interfaces;
using MediatR;
using System.Runtime.InteropServices;
namespace Guestbooky.Application.UseCases.RefreshToken;
#region Types
public record RefreshTokenCommand(string RefreshToken) : IRequest<RefreshTokenResult>;
public record RefreshTokenResult(bool Success, string Token, string RefreshToken, string? ErrorMessage = null);
#endregion
public class RefreshTokenCommandHandler : IRequestHandler<RefreshTokenCommand, RefreshTokenResult>
{
private readonly IRefreshTokenService _refreshTokenService;
private readonly IJwtTokenService _jwtTokenService;
public RefreshTokenCommandHandler(IRefreshTokenService refreshTokenService, IJwtTokenService jwtTokenService)
{
_refreshTokenService = refreshTokenService;
_jwtTokenService = jwtTokenService;
}
public Task<RefreshTokenResult> Handle(RefreshTokenCommand request, CancellationToken cancellationToken)
{
var principal = _refreshTokenService.ValidateRefreshToken(request.RefreshToken);
if (principal == null)
return Task.FromResult(new RefreshTokenResult(false, string.Empty, string.Empty, "Could not validate the cached refresh token."));
var username = principal.Identity!.Name!;
var newAccessToken = _jwtTokenService.GenerateToken(username);
var newRefreshToken = _refreshTokenService.GenerateRefreshToken();
_refreshTokenService.SaveRefreshToken(username, newRefreshToken);
return Task.FromResult(new RefreshTokenResult(true, newAccessToken, newRefreshToken));
}
}

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src/Guestbooky/Guestbooky.Domain/Abstractions/Infrastructure/IUserCredentialsProvider.cs Normal file
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using Guestbooky.Domain.Entities.User;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Domain.Abstractions.Infrastructure;
public interface IUserCredentialsProvider
{
ApplicationUser GetCredentials();
ValueTask UpdateApplicationUser(ApplicationUser updated);
}

17
src/Guestbooky/Guestbooky.Domain/Abstractions/Repositories/IGuestbookMessageRepository.cs Normal file
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using Guestbooky.Domain.Entities.Message;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace Guestbooky.Domain.Abstractions.Repositories;
public interface IGuestbookMessageRepository
{
Task<long> CountAsync(CancellationToken cancellationToken);
Task<IEnumerable<GuestbookMessage>> GetAsync(long offset, CancellationToken cancellationToken);
Task AddAsync(GuestbookMessage message, CancellationToken cancellationToken);
Task<bool> DeleteAsync(string id, CancellationToken cancellationToken);
}

37
src/Guestbooky/Guestbooky.Domain/Entities/Message/GuestbookMessage.cs Normal file
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namespace Guestbooky.Domain.Entities.Message;
/// <summary>
/// Rather slim! Not very DDD'd of me. Worked well enough though, but it's more of a DTO...?
/// Quick, think of weird stuff to do in a... simple guestbook manager!
/// </summary>
public record GuestbookMessage
{
public required Guid Id { get; init; }
public required string Author { get; init; }
public required string Message { get; init; }
public required DateTimeOffset Timestamp { get; init; }
private GuestbookMessage() { }
public static GuestbookMessage Create(string author, string message)
{
return new GuestbookMessage
{
Id = Guid.NewGuid(),
Author = author,
Message = message,
Timestamp = DateTimeOffset.UtcNow
};
}
public static GuestbookMessage CreateExisting(Guid id, string author, string message, DateTimeOffset timestamp)
{
return new GuestbookMessage
{
Id = id,
Author = author,
Message = message,
Timestamp = timestamp
};
}
}

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src/Guestbooky/Guestbooky.Domain/Entities/User/ApplicationUser.cs Normal file
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namespace Guestbooky.Domain.Entities.User;
public record ApplicationUser(string Username, string PasswordHash);

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src/Guestbooky/Guestbooky.Domain/Guestbooky.Domain.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<PackageLicenseExpression>AGPL-3.0-or-later</PackageLicenseExpression>
<PackageLicenseFile>..\..\..\LICENSE</PackageLicenseFile>
<Authors>Felipe Cotti</Authors>
</PropertyGroup>
</Project>

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src/Guestbooky/Guestbooky.Infrastructure/Application/BcryptPasswordHasher.cs Normal file
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using Guestbooky.Application.Interfaces;
namespace Guestbooky.Infrastructure.Application;
/// <summary>
/// Modern BCrypt is so <c>hard</c> to use. I love it.
/// Weird edge cases, though. Keep your stuff under 72 characters. It'll be fine.
/// </summary>
public class BCryptPasswordHasher : IPasswordHasher
{
public string HashPassword(string password)
{
return BCrypt.Net.BCrypt.EnhancedHashPassword(password);
}
public bool VerifyPassword(string password, string passwordHash)
{
return BCrypt.Net.BCrypt.EnhancedVerify(password, passwordHash);
}
}

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src/Guestbooky/Guestbooky.Infrastructure/Application/CloudflareCaptchaVerifier.cs Normal file
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using Guestbooky.Application.Interfaces;
using Guestbooky.Infrastructure.DTOs.CloudflareCaptchaVerifier;
using Guestbooky.Infrastructure.Environment;
using Microsoft.Extensions.Configuration;
using System.Text;
using System.Text.Json;
namespace Guestbooky.Infrastructure.Application
{
/// <summary>
/// The captcha verification was the first thing I tried to make work, and work it did.
/// I remember not having <see cref="IHttpClientFactory"/>! Those were the days. I saw socket exhaustion. It's not pretty.
/// </summary>
public class CloudflareCaptchaVerifier : ICaptchaVerifier
{
private const string VERIFY_ADDRESS = "https://challenges.cloudflare.com/turnstile/v0/siteverify";
private readonly string _secret;
private readonly IHttpClientFactory _httpClientFactory;
public CloudflareCaptchaVerifier(IHttpClientFactory httpClientFactory, IConfiguration configuration)
{
ArgumentNullException.ThrowIfNull(configuration);
ArgumentNullException.ThrowIfNullOrWhiteSpace(configuration[Constants.CLOUDFLARE_SECRET]);
_secret = configuration[Constants.CLOUDFLARE_SECRET]!;
_httpClientFactory = httpClientFactory;
}
public async Task<bool> VerifyAsync(string challengeResponse, CancellationToken cancellationToken)
{
using var httpClient = _httpClientFactory.CreateClient("API");
var request = new VerifyRequestDto() { Secret = _secret, Response = challengeResponse };
var content = JsonSerializer.Serialize(request);
using var result = await httpClient.PostAsync(VERIFY_ADDRESS, new StringContent(content, Encoding.UTF8, "application/json"), cancellationToken);
var serialized = await JsonSerializer.DeserializeAsync<VerifyResultDto>(await result.Content.ReadAsStreamAsync(), cancellationToken: cancellationToken);
return await Task.FromResult(serialized?.Success ?? false);
}
}
}

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src/Guestbooky/Guestbooky.Infrastructure/Application/JwtTokenService.cs Normal file
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using Guestbooky.Application.Interfaces;
using Microsoft.Extensions.Configuration;
using Microsoft.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using Guestbooky.Infrastructure.Environment;
namespace Guestbooky.Infrastructure.Application;
/// <summary>
/// Yeah, I'm one of those people. Jason Web Token Token.
/// <para/>
/// This implementation takes into account the simplistic nature of the guestbook, which assumes the admin is publishing it.
/// <para/>
/// Please don't use that suppress in work.
/// </summary>
public class JwtTokenService : IJwtTokenService
{
private readonly SymmetricSecurityKey _key;
private readonly string _issuer;
private readonly string _audience;
[System.Diagnostics.CodeAnalysis.SuppressMessage("Blocker Vulnerability", "S6781:JWT secret keys should not be disclosed", Justification = "Token key is granted via an environment variable")]
public JwtTokenService(IConfiguration configuration)
{
ArgumentNullException.ThrowIfNull(configuration);
ArgumentNullException.ThrowIfNullOrWhiteSpace(configuration[Constants.ACCESS_TOKENKEY]);
ArgumentNullException.ThrowIfNullOrWhiteSpace(configuration[Constants.ACCESS_ISSUER]);
ArgumentNullException.ThrowIfNullOrWhiteSpace(configuration[Constants.ACCESS_AUDIENCE]);
_key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration[Constants.ACCESS_TOKENKEY]!));
_issuer = configuration[Constants.ACCESS_ISSUER]!;
_audience = configuration[Constants.ACCESS_AUDIENCE]!;
}
public string GenerateToken(string username)
{
var claims = new List<Claim>
{
new(ClaimTypes.Name, username),
};
var credentials = new SigningCredentials(_key, SecurityAlgorithms.HmacSha256);
var tokenDescriptor = new SecurityTokenDescriptor
{
Subject = new ClaimsIdentity(claims),
Expires = DateTime.UtcNow.AddDays(7),
Issuer = _issuer,
Audience = _audience,
SigningCredentials = credentials
};
var tokenHandler = new JwtSecurityTokenHandler();
var token = tokenHandler.CreateToken(tokenDescriptor);
return tokenHandler.WriteToken(token);
}
}

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src/Guestbooky/Guestbooky.Infrastructure/Application/RefreshTokenService.cs Normal file
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using Guestbooky.Application.Interfaces;
using System.Security.Claims;
using System.Security.Cryptography;
namespace Guestbooky.Infrastructure.Application;
/// <summary>
/// Refreshing the token really feels like it needs a more serious implementation.
/// <para/>
/// Good luck! It should be easy.
/// We also could use a better caching mechanism.
/// </summary>
public class RefreshTokenService : IRefreshTokenService
{
private static KeyValuePair<string, string> _refreshToken = new();
public string GenerateRefreshToken()
{
var randomNumber = new byte[32];
using var rng = RandomNumberGenerator.Create();
rng.GetBytes(randomNumber);
return Convert.ToBase64String(randomNumber);
}
public ClaimsPrincipal ValidateRefreshToken(string refreshToken)
{
if (_refreshToken.Key != refreshToken)
{
return null!;
}
var username = _refreshToken.Value;
var claims = new List<Claim>
{
new(ClaimTypes.Name, username)
};
var identity = new ClaimsIdentity(claims, "RefreshToken");
return new ClaimsPrincipal(identity);
}
private static void InternalSaveRefreshToken(string username, string refreshToken)
{
_refreshToken = new(refreshToken, username);
}
public void SaveRefreshToken(string username, string refreshToken)
{
InternalSaveRefreshToken(username, refreshToken);
}
}

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src/Guestbooky/Guestbooky.Infrastructure/DTOs/CloudflareCaptchaVerifier/VerifyRequestDto.cs Normal file
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using System.Text.Json.Serialization;
namespace Guestbooky.Infrastructure.DTOs.CloudflareCaptchaVerifier;
public record VerifyRequestDto
{
[JsonPropertyName("secret")]
public string Secret { get; init; } = default!;
[JsonPropertyName("response")]
public string Response { get; init; } = default!;
[JsonPropertyName("remoteip")]
public string? RemoteIp { get; init; }
[JsonPropertyName("idempotency_key")]
public string? IdempotencyKey { get; init; }
}

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src/Guestbooky/Guestbooky.Infrastructure/DTOs/CloudflareCaptchaVerifier/VerifyResultDto.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json.Serialization;
using System.Threading.Tasks;
namespace Guestbooky.Infrastructure.DTOs.CloudflareCaptchaVerifier;
public record VerifyResultDto
{
[JsonPropertyName("success")]
public bool Success { get; init; }
[JsonPropertyName("challenge_ts")]
public DateTimeOffset? ChallengeTimestamp { get; init; }
[JsonPropertyName("hostname")]
public string? Hostname { get; init; }
[JsonPropertyName("error-codes")]
public List<string>? ErrorCodes { get; init; }
[JsonPropertyName("action")]
public string? Action { get; init; }
[JsonPropertyName("cdata")]
public string? CData { get; init; }
}

51
src/Guestbooky/Guestbooky.Infrastructure/DependencyInjection/DependencyInjection.cs Normal file
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using Guestbooky.Application.Interfaces;
using Guestbooky.Domain.Abstractions.Infrastructure;
using Guestbooky.Domain.Abstractions.Repositories;
using Guestbooky.Infrastructure.Application;
using Guestbooky.Infrastructure.Environment;
using Guestbooky.Infrastructure.Persistence.Configurations;
using Guestbooky.Infrastructure.Persistence.Repositories;
using Guestbooky.Infrastructure.User;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using MongoDB.Driver;
namespace Guestbooky.Infrastructure.DependencyInjection;
public static class DependencyInjection
{
public static IServiceCollection AddInfrastructure(this IServiceCollection services, IConfiguration configuration)
{
services.AddHttpClient("API", o =>
{
o.Timeout = TimeSpan.FromSeconds(10);
});
services.AddSingleton<MongoDbSettings>(new MongoDbSettings()
{
ConnectionString = configuration[Constants.MONGODB_CONNECTIONSTRING]!,
DatabaseName = configuration[Constants.MONGODB_DATABASENAME]!
});
services.AddSingleton<IMongoClient>(o =>
{
var settings = o.GetRequiredService<MongoDbSettings>()!;
return new MongoClient(settings.ConnectionString);
});
services.AddScoped<IMongoDatabase>(o =>
{
var client = o.GetRequiredService<IMongoClient>();
var settings = o.GetRequiredService<MongoDbSettings>()!;
return client.GetDatabase(settings.DatabaseName);
});
services.AddScoped<IGuestbookMessageRepository, MongoGuestbookMessageRepository>();
services.AddSingleton<IJwtTokenService, JwtTokenService>();
services.AddSingleton<IRefreshTokenService, RefreshTokenService>();
services.AddSingleton<IPasswordHasher, BCryptPasswordHasher>();
services.AddSingleton<ICaptchaVerifier, CloudflareCaptchaVerifier>();
services.AddSingleton<IUserCredentialsProvider, EnvironmentUserCredentialsProvider>();
return services;
}
}

28
src/Guestbooky/Guestbooky.Infrastructure/Environment/Constants.cs Normal file
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using MongoDB.Driver;
using System.Reflection;
namespace Guestbooky.Infrastructure.Environment;
/// <summary>
/// One of the main drawbacks of making this project easily settable from the environment was this being a bit convoluted.
/// Organized enough, but could be better.
/// </summary>
public static class Constants
{
public const string ACCESS_USERNAME = "ACCESS_USERNAME";
public const string ACCESS_PASSWORD = "ACCESS_PASSWORD";
public const string ACCESS_TOKENKEY = "ACCESS_TOKENKEY";
public const string ACCESS_ISSUER = "ACCESS_ISSUER";
public const string ACCESS_AUDIENCE = "ACCESS_AUDIENCE";
public const string CLOUDFLARE_SECRET = "CLOUDFLARE_SECRET";
public const string MONGODB_CONNECTIONSTRING = "MONGODB_CONNECTIONSTRING";
public const string MONGODB_DATABASENAME = "MONGODB_DATABASENAME";
public const string CORS_ORIGINS = "CORS_ORIGINS";
public const string LOG_LEVEL = "LOG_LEVEL";
public static List<string> GetAllConstantKeys()
{
var fields = typeof(Constants).GetFields(BindingFlags.Public | BindingFlags.Static).Where(field => field.FieldType == typeof(string));
return fields.Select(field => field.GetValue(null)?.ToString() ?? string.Empty).Where(x => !string.IsNullOrWhiteSpace(x)).ToList();
}
}

25
src/Guestbooky/Guestbooky.Infrastructure/Guestbooky.Infrastructure.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<PackageLicenseExpression>AGPL-3.0-or-later</PackageLicenseExpression>
<PackageLicenseFile>..\..\..\LICENSE</PackageLicenseFile>
<Authors>Felipe Cotti</Authors>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
<PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="8.0.0" />
<PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
<PackageReference Include="MongoDB.Driver" Version="2.28.0" />
<PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.0.2" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\Guestbooky.Application\Guestbooky.Application.csproj" />
<ProjectReference Include="..\Guestbooky.Domain\Guestbooky.Domain.csproj" />
</ItemGroup>
</Project>

13
src/Guestbooky/Guestbooky.Infrastructure/Persistence/Configurations/MongoDbSettings.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Infrastructure.Persistence.Configurations;
public class MongoDbSettings
{
public required string ConnectionString { get; set; }
public required string DatabaseName { get; set; }
}

25
src/Guestbooky/Guestbooky.Infrastructure/Persistence/DTOs/MongoGuestbookMessageDto.cs Normal file
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using MongoDB.Bson;
using MongoDB.Bson.Serialization.Attributes;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.Infrastructure.Persistence.DTOs;
public class GuestbookMessageDto
{
[BsonId]
[BsonRepresentation(BsonType.String)]
public required string Id { get; set; }
[BsonElement("Author")]
public required string Author { get; set; }
[BsonElement("Message")]
public required string Message { get; set; }
[BsonElement("Timestamp")]
public required DateTime Timestamp { get; set; }
}

88
src/Guestbooky/Guestbooky.Infrastructure/Persistence/Repositories/MongoGuestbookMessageRepository.cs Normal file
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using Guestbooky.Domain.Abstractions.Repositories;
using Guestbooky.Domain.Entities.Message;
using Guestbooky.Infrastructure.Persistence.DTOs;
using Microsoft.Extensions.Logging;
using MongoDB.Driver;
namespace Guestbooky.Infrastructure.Persistence.Repositories
{
/// <summary>
/// First time ever using NoSQL here. I'm still not sure if I fell into any big anti-patterns.
/// As someone much more used to SQL lingo, this feels a bit weird but it is enjoyable.
/// Could use more robust error handling but I've yet to see it not working.
/// </summary>
public class MongoGuestbookMessageRepository : IGuestbookMessageRepository
{
private const string COLLECTION_NAME = "GuestbookMessages";
private readonly IMongoCollection<GuestbookMessageDto> _messages;
private readonly ILogger<MongoGuestbookMessageRepository> _logger;
public MongoGuestbookMessageRepository(IMongoDatabase database, ILogger<MongoGuestbookMessageRepository> logger)
{
_messages = database.GetCollection<GuestbookMessageDto>(COLLECTION_NAME);
_logger = logger;
}
public async Task AddAsync(GuestbookMessage message, CancellationToken cancellationToken)
{
_logger.LogDebug("Adding guestbook entry.");
var messageDto = MapToDto(message);
await _messages.InsertOneAsync(messageDto, cancellationToken: cancellationToken);
}
public async Task<bool> DeleteAsync(string id, CancellationToken cancellationToken)
{
_logger.LogDebug($"Removing guestbook entry. Id: {id}");
var result = await _messages.DeleteOneAsync(m => m.Id == id, cancellationToken: cancellationToken);
if (result.DeletedCount != 1)
_logger.LogError($"Deleted count is different from 1. Value: {result.DeletedCount}");
if (!result.IsAcknowledged)
_logger.LogError("Deletion was not acknowledged.");
return result.IsAcknowledged && result.DeletedCount == 1;
}
public async Task<IEnumerable<GuestbookMessage>> GetAsync(long offset, CancellationToken cancellationToken)
{
if (offset < 0) offset = 0;
_logger.LogDebug("Acquiring guestbook entries.");
var messageDtos = await _messages.Find(_ => true)
.SortBy(x => x.Timestamp)
.Skip((int?)offset)
.Limit(50)
.ToCursorAsync(cancellationToken);
return messageDtos.ToEnumerable().Select(MapToDomainModel).ToArray();
}
public async Task<long> CountAsync(CancellationToken cancellationToken)
{
_logger.LogInformation("Getting amount of messages stored.");
return await _messages.CountDocumentsAsync(_ => true, cancellationToken: cancellationToken);
}
private static GuestbookMessage MapToDomainModel(GuestbookMessageDto dto)
{
return GuestbookMessage.CreateExisting(
Guid.Parse(dto.Id),
dto.Author,
dto.Message,
new DateTimeOffset(dto.Timestamp, TimeSpan.Zero)
);
}
private static GuestbookMessageDto MapToDto(GuestbookMessage message)
{
return new GuestbookMessageDto
{
Id = message.Id.ToString(),
Author = message.Author,
Message = message.Message,
Timestamp = message.Timestamp.UtcDateTime
};
}
}
}

29
src/Guestbooky/Guestbooky.Infrastructure/User/EnvironmentUserCredentialsProvider.cs Normal file
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using Guestbooky.Application.Interfaces;
using Guestbooky.Domain.Abstractions.Infrastructure;
using Guestbooky.Domain.Entities.User;
using Guestbooky.Infrastructure.Environment;
using Microsoft.Extensions.Configuration;
namespace Guestbooky.Infrastructure.User;
public class EnvironmentUserCredentialsProvider : IUserCredentialsProvider
{
private ApplicationUser _user;
public EnvironmentUserCredentialsProvider(IConfiguration configuration, IPasswordHasher passwordHasher)
{
ArgumentNullException.ThrowIfNull(configuration);
ArgumentNullException.ThrowIfNullOrWhiteSpace(configuration[Constants.ACCESS_USERNAME]);
ArgumentNullException.ThrowIfNullOrWhiteSpace(configuration[Constants.ACCESS_PASSWORD]);
_user = new ApplicationUser(configuration[Constants.ACCESS_USERNAME]!, passwordHasher.HashPassword(configuration[Constants.ACCESS_PASSWORD]!));
}
public ApplicationUser GetCredentials() => _user;
public ValueTask UpdateApplicationUser(ApplicationUser updated)
{
_user = updated;
return ValueTask.CompletedTask;
}
}

11
src/Guestbooky/Guestbooky.UnitTests/UnitTest1.cs Normal file
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namespace Guestbooky.UnitTests
{
public class UnitTest1
{
[Fact]
public void Test1()
{
}
}
}

49
src/Guestbooky/Guestbooky.sln Normal file
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@ -0,0 +1,49 @@

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.10.35013.160
MinimumVisualStudioVersion = 10.0.40219.1
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Guestbooky.API", "Guestbooky.API\Guestbooky.API.csproj", "{478BC4F1-3952-4562-B7C1-1CBC8F07AF14}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Guestbooky.Domain", "Guestbooky.Domain\Guestbooky.Domain.csproj", "{3023D8C6-B6D5-42B8-8387-D85F06B353A6}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Guestbooky.Application", "Guestbooky.Application\Guestbooky.Application.csproj", "{EB283A09-68B9-47A0-801B-698EAD99121F}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Guestbooky.Infrastructure", "Guestbooky.Infrastructure\Guestbooky.Infrastructure.csproj", "{D851911C-F268-4D28-83B5-9240C153449F}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Guestbooky.UnitTests", "..\..\tests\Guestbooky.UnitTests\Guestbooky.UnitTests.csproj", "{8B565439-7C90-4FF9-A9F5-A1F7B28051A8}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{478BC4F1-3952-4562-B7C1-1CBC8F07AF14}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{478BC4F1-3952-4562-B7C1-1CBC8F07AF14}.Debug|Any CPU.Build.0 = Debug|Any CPU
{478BC4F1-3952-4562-B7C1-1CBC8F07AF14}.Release|Any CPU.ActiveCfg = Release|Any CPU
{478BC4F1-3952-4562-B7C1-1CBC8F07AF14}.Release|Any CPU.Build.0 = Release|Any CPU
{3023D8C6-B6D5-42B8-8387-D85F06B353A6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{3023D8C6-B6D5-42B8-8387-D85F06B353A6}.Debug|Any CPU.Build.0 = Debug|Any CPU
{3023D8C6-B6D5-42B8-8387-D85F06B353A6}.Release|Any CPU.ActiveCfg = Release|Any CPU
{3023D8C6-B6D5-42B8-8387-D85F06B353A6}.Release|Any CPU.Build.0 = Release|Any CPU
{EB283A09-68B9-47A0-801B-698EAD99121F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{EB283A09-68B9-47A0-801B-698EAD99121F}.Debug|Any CPU.Build.0 = Debug|Any CPU
{EB283A09-68B9-47A0-801B-698EAD99121F}.Release|Any CPU.ActiveCfg = Release|Any CPU
{EB283A09-68B9-47A0-801B-698EAD99121F}.Release|Any CPU.Build.0 = Release|Any CPU
{D851911C-F268-4D28-83B5-9240C153449F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{D851911C-F268-4D28-83B5-9240C153449F}.Debug|Any CPU.Build.0 = Debug|Any CPU
{D851911C-F268-4D28-83B5-9240C153449F}.Release|Any CPU.ActiveCfg = Release|Any CPU
{D851911C-F268-4D28-83B5-9240C153449F}.Release|Any CPU.Build.0 = Release|Any CPU
{8B565439-7C90-4FF9-A9F5-A1F7B28051A8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{8B565439-7C90-4FF9-A9F5-A1F7B28051A8}.Debug|Any CPU.Build.0 = Debug|Any CPU
{8B565439-7C90-4FF9-A9F5-A1F7B28051A8}.Release|Any CPU.ActiveCfg = Release|Any CPU
{8B565439-7C90-4FF9-A9F5-A1F7B28051A8}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {00088182-D5D2-493E-B9BB-5371491ACC95}
EndGlobalSection
EndGlobal

155
src/input-example/example.html Normal file
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<!-- Yes, this is a jolly good page with all styles glued in. Don't worry, the JS portion is here too. This way you don't need to check multiple files
And I get to save space? No, actually not.
-->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Guestbook usage example with the captcha</title>
<style>
body {
margin: 0;
background-color: aliceblue;
font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
font-size: 10pt;
}
#guestbookForm form {
display: table;
margin: 0;
align-items: center;
font-size: 1.2em;
justify-items: center;
}
#guestbookForm field {
display: table-row;
margin: 4pt 4pt 4pt 4pt;
padding: 4pt 4pt 4pt 4pt;
}
#guestbookForm label {
display: table-cell;
height: auto;
vertical-align: middle;
font-size: 1.2em;
text-align: right;
padding-right: 0.2em;
}
#guestbookForm input, textarea {
display: table-cell;
border: 0.2em hsl(78, 75%, 51%) outset;
box-shadow: 0px 0px 6px 1px rgba(0, 0, 0, .5);
border-radius: 0.4em;
padding: 0.5em 0.5em;
margin: 0.5em;
font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
font-size: 1.2em;
resize: vertical;
min-height: 1.2em;
}
#guestbookForm input:focus, textarea:focus {
outline: none;
}
#guestbookForm div {
padding: 2pt;
}
#guestbookForm button {
font-size: 1.4em;
padding: 0.5em 1.5em;
margin: 2pt 3pt;
border-radius: 0.4em;
background-color: hsl(81, 75%, 51%);
}
.form-div {
margin: 5em auto;
width: fit-content;
height: fit-content;
align-self: center;
justify-self: center;
}
</style>
<script src="https://challenges.cloudflare.com/turnstile/v0/api.js" async defer></script>
</head>
<body>
<div class="form-div">
<h1>Sample guestbooky input page</h1>
<!-- A form should be defined with the action pointing to the backend's message endpoint, where the POST with the message will be sent. -->
<form id="guestbookForm" action="http://example.guestbook.com/message" method="POST">
<field>
<label for="author">Name: </label>
<input type="text" id="author" placeholder="Please add your name!" cols="40" maxlength="128" minlength="1" required />
</field>
<field>
<label for="author">Message: </label>
<textarea id="message" placeholder="Please add your message!" cols="60" rows="6" maxlength="4096" minlength="1" required></textarea>
</field>
<!-- Cloudflare contains more data on how to further customize the captcha. The site key is also provided in the control panel. -->
<!-- Refer to https://developers.cloudflare.com/turnstile/get-started/client-side-rendering/ for more options. -->
<!-- Once the challenge is executed, the data is sent to the hidden field in the form through the setCaptchaResponse callback defined in the script below. -->
<field>
<label></label>
<div class="cf-turnstile" data-sitekey="0x00000000000000000000000" data-callback="setCaptchaResponse"></div>
<input type="hidden" id="captchaResponse" name="captchaResponse" />
</field>
<field>
<label></label>
<button type="submit" value="Submit">Send</button>
</field>
</form>
</div>
<!-- Now, the script.
-> setCaptchaResponse(): callback from the turnstile to the hidden field
-> Event Listener: Listens to the submit event from the form, acquires the values and sends the POST request as structured JSON.
Once a response pops back we can check if it worked or not. This is rather crude just to get it working in a development setting.
Hopefully if this ever gets used it is tinkered with a bit.
-->
<script>
function setCaptchaResponse(token) {
document.getElementById("captchaResponse").value = token;
}
document
.getElementById("guestbookForm")
.addEventListener("submit", async function (e) {
e.preventDefault();
const author = document.getElementById("author").value;
const message = document.getElementById("message").value;
const captchaResponse = document.getElementById("captchaResponse").value;
const data = {
author,
message,
captchaResponse,
};
const response = await fetch(this.action, {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify(data),
});
const result = await response.json();
if (response.ok) {
alert("Note added successfully!");
this.reset(); // Clear the form fields
} else {
alert(result.errorMessage);
}
});
</script>
</body>
</html>

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tests/Guestbooky.UnitTests/API/Controllers/AuthControllerTests.cs Normal file
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using Guestbooky.API.Controllers;
using Guestbooky.API.DTOs.Auth;
using Guestbooky.Application.UseCases.AuthenticateUser;
using Guestbooky.Application.UseCases.RefreshToken;
using MediatR;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using Moq;
using System.Net;
namespace Guestbooky.UnitTests.API.Controllers;
public class AuthControllerTests
{
private readonly Mock<IMediator> _mediatorMock;
private readonly Mock<ILogger<AuthController>> _loggerMock;
public AuthControllerTests()
{
_mediatorMock = new Mock<IMediator>();
_loggerMock = new Mock<ILogger<AuthController>>();
}
[Fact]
public async Task Login_ReturnsOk_WhenAuthenticated()
{
// Arrange
var controller = new AuthController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new LoginRequestDto("testuser", "password");
_mediatorMock.Setup(m => m.Send(It.IsAny<AuthenticateUserCommand>(), default))
.ReturnsAsync(new AuthenticateUserResult(true, "testToken", "testRefreshToken"));
// Act
var result = await controller.Login(requestDto, default);
// Assert
var okResult = Assert.IsType<OkObjectResult>(result);
var responseDto = Assert.IsType<LoginResponseDto>(okResult.Value);
Assert.Equal("testToken", responseDto.Token);
Assert.Equal("testRefreshToken", responseDto.RefreshToken);
}
[Fact]
public async Task Login_ReturnsUnauthorized_WhenNotAuthenticated()
{
// Arrange
var controller = new AuthController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new LoginRequestDto("testuser", "wrongpassword");
_mediatorMock.Setup(m => m.Send(It.IsAny<AuthenticateUserCommand>(), default))
.ReturnsAsync(new AuthenticateUserResult(false, string.Empty, string.Empty));
// Act
var result = await controller.Login(requestDto, default);
// Assert
Assert.NotNull(result);
Assert.IsType<UnauthorizedResult>(result);
}
[Fact]
public async Task Login_ReturnsProblemDetails_WhenExceptionIsThrown()
{
// Arrange
var controller = new AuthController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new LoginRequestDto("testuser", "password");
_mediatorMock.Setup(m => m.Send(It.IsAny<AuthenticateUserCommand>(), default))
.ThrowsAsync(new Exception());
// Act
var result = await controller.Login(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(500, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.StartsWith("An error occurred on the server:", problemDetails.Detail);
}
[Fact]
public async Task RefreshToken_ReturnsOk_WhenTokenMatches()
{
// Arrange
var controller = new AuthController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new RefreshTokenRequestDto("refresh");
_mediatorMock.Setup(m => m.Send(It.IsAny<RefreshTokenCommand>(), default))
.ReturnsAsync(new RefreshTokenResult(true, "testToken", "testRefreshToken"));
// Act
var result = await controller.RefreshToken(requestDto, default);
// Assert
Assert.NotNull(result);
var okResult = Assert.IsType<OkObjectResult>(result);
var responseDto = Assert.IsType<RefreshTokenResponseDto>(okResult.Value);
Assert.Equal("testToken", responseDto.Token);
Assert.Equal("testRefreshToken", responseDto.RefreshToken);
}
[Fact]
public async Task RefreshToken_ReturnsUnauthorized_WhenTokenNotMatched()
{
// Arrange
var controller = new AuthController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new RefreshTokenRequestDto("refresh");
_mediatorMock.Setup(m => m.Send(It.IsAny<RefreshTokenCommand>(), default))
.ReturnsAsync(new RefreshTokenResult(false, string.Empty, string.Empty, "error"));
// Act
var result = await controller.RefreshToken(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<UnauthorizedObjectResult>(result);
Assert.NotNull(result);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.Equal("error", problemDetails.Detail);
}
[Fact]
public async Task RefreshToken_ReturnsProblemDetails_WhenExceptionIsThrown()
{
// Arrange
var controller = new AuthController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new RefreshTokenRequestDto("refresh");
_mediatorMock.Setup(m => m.Send(It.IsAny<RefreshTokenCommand>(), default))
.ThrowsAsync(new Exception());
// Act
var result = await controller.RefreshToken(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(500, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.StartsWith("An error occurred on the server:", problemDetails.Detail);
}
}

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tests/Guestbooky.UnitTests/API/Controllers/MessageControllerTests.cs Normal file
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using Guestbooky.API.Controllers;
using Guestbooky.API.DTOs.Messages;
using Guestbooky.Application.UseCases.CountGuestbookMessages;
using Guestbooky.Application.UseCases.DeleteGuestbookMessage;
using Guestbooky.Application.UseCases.InsertGuestMessage;
using Guestbooky.Application.UseCases.ListGuestbookMessages;
using MediatR;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using Moq;
namespace Guestbooky.UnitTests.API.Controllers;
public class MessageControllerTests
{
private readonly Mock<IMediator> _mediatorMock;
private readonly Mock<ILogger<MessageController>> _loggerMock;
public MessageControllerTests()
{
_mediatorMock = new Mock<IMediator>();
_loggerMock = new Mock<ILogger<MessageController>>();
}
#region Insert()
[Fact]
public async Task Insert_ReturnsCreated_WhenValidMessageSent()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new InsertMessageRequestDto() { Author = "tester", Message = "message", CaptchaResponse = "validCaptcha" };
_mediatorMock.Setup(m => m.Send(It.IsAny<InsertGuestbookMessageCommand>(), default))
.ReturnsAsync(new InsertGuestbookMessageResult(true, string.Empty));
// Act
var result = await controller.Insert(requestDto, default);
// Assert
Assert.IsType<CreatedResult>(result);
}
[Fact]
public async Task Insert_ReturnsForbidden_WhenInvalidInputProvided()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new InsertMessageRequestDto() { Author = "tester", Message = "message", CaptchaResponse = "invalidCaptcha" };
_mediatorMock.Setup(m => m.Send(It.IsAny<InsertGuestbookMessageCommand>(), default))
.ReturnsAsync(new InsertGuestbookMessageResult(false, "An invalid captcha has been provided"));
// Act
var result = await controller.Insert(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(403, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.Equal("An invalid captcha has been provided", problemDetails.Detail);
}
[Fact]
public async Task Insert_ReturnsProblemDetails_WhenExceptionIsThrown()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new InsertMessageRequestDto() { Author = "tester", Message = "message", CaptchaResponse = "invalidCaptcha" };
_mediatorMock.Setup(m => m.Send(It.IsAny<InsertGuestbookMessageCommand>(), default))
.ThrowsAsync(new Exception());
// Act
var result = await controller.Insert(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(500, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.StartsWith("An error occurred on the server:", problemDetails.Detail);
}
#endregion
#region Get
[Fact]
public async Task Get_ReturnsMessages_WhenRangeValueSent()
{
// Arrange
var httpContextMock = new Mock<HttpContext>();
var httpResponseMock = new Mock<HttpResponse>();
var headers = new HeaderDictionary();
httpResponseMock.SetupProperty(r => r.StatusCode);
httpResponseMock.SetupGet(r => r.Headers).Returns(headers);
httpContextMock.SetupGet(h => h.Response).Returns(httpResponseMock.Object);
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object)
{
ControllerContext = new ControllerContext()
{
HttpContext = httpContextMock.Object
}
};
var requestedRange = new System.Net.Http.Headers.RangeItemHeaderValue(1, 3);
List<GuestbookMessageQueryResult> availableMessages = [
new GuestbookMessageQueryResult("test-id1", "test-author", "test-message1", DateTimeOffset.UnixEpoch.AddDays(1)),
new GuestbookMessageQueryResult("test-id2", "test-author", "test-message2", DateTimeOffset.UnixEpoch.AddDays(2)),
new GuestbookMessageQueryResult("test-id3", "test-author", "test-message3", DateTimeOffset.UnixEpoch.AddDays(3)),
new GuestbookMessageQueryResult("test-id4", "test-author", "test-message4", DateTimeOffset.UnixEpoch.AddDays(4)),
new GuestbookMessageQueryResult("test-id5", "test-author", "test-message5", DateTimeOffset.UnixEpoch.AddDays(5)),
];
var intendedMessages = availableMessages.Skip((int)requestedRange.From! - 1).Take((int)requestedRange.From! - 1 + (int)requestedRange.To!);
var requestDto = new GetMessagesRequestDto() { Range = new System.Net.Http.Headers.RangeHeaderValue() { Unit = "messages" } };
requestDto.Range.Ranges.Add(requestedRange);
_mediatorMock.Setup(m => m.Send(It.IsAny<ListGuestbookMessagesQuery>(), default))
.ReturnsAsync(new ListGuestbookMessagesQueryResult(intendedMessages));
_mediatorMock.Setup(m => m.Send(It.IsAny<CountGuestbookMessagesQuery>(), default))
.ReturnsAsync(new CountGuestbookMessagesQueryResult(availableMessages.Count));
// Act
var result = await controller.Get(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.IsAssignableFrom<IEnumerable<GetMessagesResponseDto>>(objectResult.Value);
httpResponseMock.VerifySet(r => r.StatusCode = StatusCodes.Status206PartialContent);
Assert.Equal("messages", headers["Accept-Ranges"]);
Assert.Contains("messages", headers["Content-Range"].ToString());
}
[Fact]
public async Task Get_ReturnsMessages_WithNoRange()
{
// Arrange
var httpContextMock = new Mock<HttpContext>();
var httpResponseMock = new Mock<HttpResponse>();
var headers = new HeaderDictionary();
httpResponseMock.SetupProperty(r => r.StatusCode);
httpResponseMock.SetupGet(r => r.Headers).Returns(headers);
httpContextMock.SetupGet(h => h.Response).Returns(httpResponseMock.Object);
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object)
{
ControllerContext = new ControllerContext()
{
HttpContext = httpContextMock.Object
}
};
List<GuestbookMessageQueryResult> availableMessages = [
new GuestbookMessageQueryResult("test-id1", "test-author", "test-message1", DateTimeOffset.UnixEpoch.AddDays(1)),
new GuestbookMessageQueryResult("test-id2", "test-author", "test-message2", DateTimeOffset.UnixEpoch.AddDays(2)),
new GuestbookMessageQueryResult("test-id3", "test-author", "test-message3", DateTimeOffset.UnixEpoch.AddDays(3)),
new GuestbookMessageQueryResult("test-id4", "test-author", "test-message4", DateTimeOffset.UnixEpoch.AddDays(4)),
new GuestbookMessageQueryResult("test-id5", "test-author", "test-message5", DateTimeOffset.UnixEpoch.AddDays(5)),
];
var intendedMessages = availableMessages.Skip(0).Take(50);
var requestDto = new GetMessagesRequestDto() { Range = null! };
_mediatorMock.Setup(m => m.Send(It.IsAny<ListGuestbookMessagesQuery>(), default))
.ReturnsAsync(new ListGuestbookMessagesQueryResult(intendedMessages));
_mediatorMock.Setup(m => m.Send(It.IsAny<CountGuestbookMessagesQuery>(), default))
.ReturnsAsync(new CountGuestbookMessagesQueryResult(availableMessages.Count));
// Act
var result = await controller.Get(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.IsAssignableFrom<IEnumerable<GetMessagesResponseDto>>(objectResult.Value);
httpResponseMock.VerifySet(r => r.StatusCode = StatusCodes.Status206PartialContent);
Assert.Equal("messages", headers["Accept-Ranges"]);
Assert.Contains("messages", headers["Content-Range"].ToString());
}
[Fact]
public async Task Get_ReturnsProblemDetails_WhenExceptionIsThrown()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new GetMessagesRequestDto() { Range = null! };
_mediatorMock.Setup(m => m.Send(It.IsAny<ListGuestbookMessagesQuery>(), default))
.ThrowsAsync(new Exception());
// Act
var result = await controller.Get(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(500, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.StartsWith("An error occurred on the server:", problemDetails.Detail);
}
#endregion
#region Delete
[Fact]
public async Task Delete_ReturnsOk_WithValidMessage()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new DeleteMessageRequestDto() { Id = "test_id" };
_mediatorMock.Setup(m => m.Send(It.IsAny<DeleteGuestbookMessageCommand>(), default))
.ReturnsAsync(new DeleteGuestbookMessageResult(true));
// Act
var result = await controller.Delete(requestDto, default);
// Assert
Assert.IsType<OkResult>(result);
}
[Fact]
public async Task Delete_ReturnsForbidden_WhenInvalidInputProvided()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new DeleteMessageRequestDto() { Id = "invalid_test_id" };
_mediatorMock.Setup(m => m.Send(It.IsAny<DeleteGuestbookMessageCommand>(), default))
.ReturnsAsync(new DeleteGuestbookMessageResult(false));
// Act
var result = await controller.Delete(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(500, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.StartsWith("Could not delete the guestbook entry", problemDetails.Detail);
}
[Fact]
public async Task Delete_ReturnsProblemDetails_WhenExceptionIsThrown()
{
// Arrange
var controller = new MessageController(_mediatorMock.Object, _loggerMock.Object);
var requestDto = new DeleteMessageRequestDto() { Id = "invalid_test_id" };
_mediatorMock.Setup(m => m.Send(It.IsAny<DeleteGuestbookMessageCommand>(), default))
.ThrowsAsync(new Exception());
// Act
var result = await controller.Delete(requestDto, default);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.Equal(500, objectResult.StatusCode);
var problemDetails = Assert.IsType<ProblemDetails>(objectResult.Value);
Assert.StartsWith("An error occurred on the server:", problemDetails.Detail);
}
#endregion
}

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using Guestbooky.API.Validations;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.API.Validations
{
public class InvalidModelStateResponseFactoryTests
{
[Fact]
public async Task DefaultInvalidModelStateResponse_InvalidActionContext_ReturnsBadRequest()
{
// Arrange
var httpContextMock = new Mock<HttpContext>();
var httpRequestMock = new Mock<HttpRequest>();
var httpResponseMock = new Mock<HttpResponse>();
var headers = new HeaderDictionary();
httpResponseMock.SetupProperty(r => r.StatusCode);
httpResponseMock.SetupGet(r => r.Headers).Returns(headers);
httpContextMock.SetupGet(h => h.Request).Returns(httpRequestMock.Object);
httpContextMock.SetupGet(h => h.Response).Returns(httpResponseMock.Object);
var modelState = new Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary();
modelState.AddModelError("test", "test error");
var actionContext = new ActionContext(httpContextMock.Object,
new Microsoft.AspNetCore.Routing.RouteData(),
new Microsoft.AspNetCore.Mvc.Abstractions.ActionDescriptor(),
modelState);
// Act
var result = InvalidModelStateResponseFactory.DefaultInvalidModelStateResponse(actionContext);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.NotNull(objectResult);
Assert.Equal(400, objectResult.StatusCode);
Assert.Equal("application/problem+json", objectResult.ContentTypes[0]);
var problemDetails = Assert.IsType<ValidationProblemDetails>(objectResult.Value);
Assert.NotNull(problemDetails);
Assert.Equal("test error", problemDetails.Errors["test"][0]);
}
[Fact]
public async Task DefaultInvalidModelStateResponse_BadRangeValue_ReturnsRequestedRangeNotSatisfiable()
{
// Arrange
var httpContextMock = new Mock<HttpContext>();
var httpRequestMock = new Mock<HttpRequest>();
var httpResponseMock = new Mock<HttpResponse>();
var headers = new HeaderDictionary();
httpResponseMock.SetupProperty(r => r.StatusCode);
httpResponseMock.SetupGet(r => r.Headers).Returns(headers);
httpContextMock.SetupGet(h => h.Request).Returns(httpRequestMock.Object);
httpContextMock.SetupGet(h => h.Response).Returns(httpResponseMock.Object);
var modelState = new Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary();
modelState.AddModelError("Range.Range", "A test value is not valid for Range.");
var actionContext = new ActionContext(httpContextMock.Object,
new Microsoft.AspNetCore.Routing.RouteData(),
new Microsoft.AspNetCore.Mvc.Abstractions.ActionDescriptor(),
modelState);
// Act
var result = InvalidModelStateResponseFactory.DefaultInvalidModelStateResponse(actionContext);
// Assert
Assert.NotNull(result);
var objectResult = Assert.IsType<ObjectResult>(result);
Assert.NotNull(objectResult);
Assert.Equal(416, objectResult.StatusCode);
Assert.Equal("application/problem+json", objectResult.ContentTypes[0]);
var problemDetails = Assert.IsType<ValidationProblemDetails>(objectResult.Value);
Assert.NotNull(problemDetails);
Assert.Equal("A test value is not valid for Range.", problemDetails.Errors["Range.Range"][0]);
}
[Fact]
public async Task DefaultInvalidModelStateResponse_NullRangeError_ReturnsNull()
{
// Arrange
var httpContextMock = new Mock<HttpContext>();
var httpRequestMock = new Mock<HttpRequest>();
var httpResponseMock = new Mock<HttpResponse>();
var headers = new HeaderDictionary();
httpResponseMock.SetupProperty(r => r.StatusCode);
httpResponseMock.SetupGet(r => r.Headers).Returns(headers);
httpContextMock.SetupGet(h => h.Request).Returns(httpRequestMock.Object);
httpContextMock.SetupGet(h => h.Response).Returns(httpResponseMock.Object);
var modelState = new Microsoft.AspNetCore.Mvc.ModelBinding.ModelStateDictionary();
modelState.AddModelError("Range.Range", "Range here would have been delivered as something invalid.");
var actionContext = new ActionContext(httpContextMock.Object,
new Microsoft.AspNetCore.Routing.RouteData(),
new Microsoft.AspNetCore.Mvc.Abstractions.ActionDescriptor(),
modelState);
// Act
var result = InvalidModelStateResponseFactory.DefaultInvalidModelStateResponse(actionContext);
// Assert
Assert.Null(result);
}
}
}

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using Guestbooky.Application.Interfaces;
using Guestbooky.Application.UseCases.AuthenticateUser;
using Guestbooky.Domain.Abstractions.Infrastructure;
using Guestbooky.Domain.Entities.User;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.Application.UseCases;
public class AuthenticateUserCommandHandlerTests
{
private readonly Mock<IPasswordHasher> _passwordHasherMock;
private readonly Mock<IUserCredentialsProvider> _userCredentialsProviderMock;
private readonly Mock<IJwtTokenService> _jwtTokenServiceMock;
private readonly Mock<IRefreshTokenService> _refreshTokenServiceMock;
private readonly AuthenticateUserCommandHandler _handler;
public AuthenticateUserCommandHandlerTests()
{
_passwordHasherMock = new Mock<IPasswordHasher>();
_userCredentialsProviderMock = new Mock<IUserCredentialsProvider>();
_jwtTokenServiceMock = new Mock<IJwtTokenService>();
_refreshTokenServiceMock = new Mock<IRefreshTokenService>();
_handler = new AuthenticateUserCommandHandler(
_passwordHasherMock.Object,
_jwtTokenServiceMock.Object,
_userCredentialsProviderMock.Object,
_refreshTokenServiceMock.Object
);
}
[Fact]
public async Task Handle_WithValidCredentials_ReturnsSuccessfulAuthentication()
{
// Arrange
var command = new AuthenticateUserCommand("testuser", "testpass");
var userCredentials = new ApplicationUser("testuser","hashpass");
var expectedToken = "token";
var expectedRefreshToken = "refresh";
_userCredentialsProviderMock.Setup(x => x.GetCredentials()).Returns(userCredentials);
_passwordHasherMock.Setup(x => x.VerifyPassword(It.IsAny<string>(), It.IsAny<string>())).Returns(true);
_jwtTokenServiceMock.Setup(x => x.GenerateToken(It.IsAny<string>())).Returns(expectedToken);
_refreshTokenServiceMock.Setup(x => x.GenerateRefreshToken()).Returns(expectedRefreshToken);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.True(result.IsAuthenticated);
Assert.Equal(expectedToken, result.Token);
Assert.Equal(expectedRefreshToken, result.RefreshToken);
_refreshTokenServiceMock.Verify(x => x.SaveRefreshToken(It.IsAny<string>(), It.IsAny<string>()), Times.Once);
}
[Fact]
public async Task Handle_WithInvalidUsername_ReturnsFailedAuthentication()
{
// Arrange
var command = new AuthenticateUserCommand("wronguser", "userpass");
var userCredentials = new ApplicationUser("testuser", "hashpass");
_userCredentialsProviderMock.Setup(x => x.GetCredentials()).Returns(userCredentials);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.False(result.IsAuthenticated);
Assert.Equal(string.Empty, result.Token);
Assert.Equal(string.Empty, result.RefreshToken);
_jwtTokenServiceMock.Verify(x => x.GenerateToken(It.IsAny<string>()), Times.Never);
_refreshTokenServiceMock.Verify(x => x.GenerateRefreshToken(), Times.Never);
_refreshTokenServiceMock.Verify(x => x.SaveRefreshToken(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
}
[Fact]
public async Task Handle_WithInvalidPassword_ReturnsFailedAuthentication()
{
// Arrange
var command = new AuthenticateUserCommand("testuser", "wrongpass");
var userCredentials = new ApplicationUser("testuser", "hashpass");
_userCredentialsProviderMock.Setup(x => x.GetCredentials()).Returns(userCredentials);
_passwordHasherMock.Setup(x => x.VerifyPassword(It.IsAny<string>(), It.IsAny<string>())).Returns(false);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.False(result.IsAuthenticated);
Assert.Equal(string.Empty, result.Token);
Assert.Equal(string.Empty, result.RefreshToken);
_jwtTokenServiceMock.Verify(x => x.GenerateToken(It.IsAny<string>()), Times.Never);
_refreshTokenServiceMock.Verify(x => x.GenerateRefreshToken(), Times.Never);
_refreshTokenServiceMock.Verify(x => x.SaveRefreshToken(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
}
}

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using Guestbooky.Application.UseCases.CountGuestbookMessages;
using Guestbooky.Domain.Abstractions.Repositories;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.Application.UseCases;
public class CountGuestbookMessagesQueryHandlerTests
{
private readonly Mock<IGuestbookMessageRepository> _repositoryMock;
private readonly CountGuestbookMessagesQueryHandler _handler;
public CountGuestbookMessagesQueryHandlerTests()
{
_repositoryMock = new Mock<IGuestbookMessageRepository>();
_handler = new CountGuestbookMessagesQueryHandler(_repositoryMock.Object);
}
[Fact]
public async Task Handle_ReturnsCorrectCount()
{
// Arrange
const long expectedCount = 42;
_repositoryMock.Setup(x => x.CountAsync(It.IsAny<CancellationToken>())).ReturnsAsync(expectedCount);
var query = new CountGuestbookMessagesQuery();
// Act
var result = await _handler.Handle(query, CancellationToken.None);
// Assert
Assert.Equal(expectedCount, result.Amount);
_repositoryMock.Verify(x => x.CountAsync(It.IsAny<CancellationToken>()), Times.Once);
}
}

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using Guestbooky.Application.UseCases.DeleteGuestbookMessage;
using Guestbooky.Domain.Abstractions.Repositories;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.Application.UseCases;
public class DeleteGuestbookMessageCommandHandlerTests
{
private readonly Mock<IGuestbookMessageRepository> _repositoryMock;
private readonly DeleteGuestbookMessageCommandHandler _handler;
public DeleteGuestbookMessageCommandHandlerTests()
{
_repositoryMock = new Mock<IGuestbookMessageRepository>();
_handler = new DeleteGuestbookMessageCommandHandler(_repositoryMock.Object);
}
[Fact]
public async Task Handle_HasMessage_ReturnsSuccessTrue()
{
// Arrange
var messageId = "existing-message-id";
_repositoryMock.Setup(x => x.DeleteAsync(messageId, It.IsAny<CancellationToken>())).ReturnsAsync(true);
var command = new DeleteGuestbookMessageCommand(messageId);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.True(result.Success);
_repositoryMock.Verify(x => x.DeleteAsync(messageId, It.IsAny<CancellationToken>()), Times.Once);
}
[Fact]
public async Task Handle_NoMessage_ReturnsFalse()
{
// Arrange
var messageId = "non-existent-message-id";
_repositoryMock.Setup(x => x.DeleteAsync(messageId, It.IsAny<CancellationToken>()))
.ReturnsAsync(false);
var command = new DeleteGuestbookMessageCommand(messageId);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.False(result.Success);
_repositoryMock.Verify(x => x.DeleteAsync(messageId, It.IsAny<CancellationToken>()), Times.Once);
}
[Theory]
[InlineData("")]
[InlineData(null)]
public async Task Handle_WithInvalidIds_StillAttemptsDelete(string invalidId)
{
// Arrange
_repositoryMock.Setup(x => x.DeleteAsync(invalidId, It.IsAny<CancellationToken>()))
.ReturnsAsync(false);
var command = new DeleteGuestbookMessageCommand(invalidId);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.False(result.Success);
_repositoryMock.Verify(x => x.DeleteAsync(invalidId, It.IsAny<CancellationToken>()), Times.Once);
}
}

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using FluentValidation;
using FluentValidation.Results;
using Guestbooky.Application.Interfaces;
using Guestbooky.Application.UseCases.InsertGuestMessage;
using Guestbooky.Domain.Abstractions.Repositories;
using Guestbooky.Domain.Entities.Message;
using MediatR.Pipeline;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.Application.UseCases;
public static class InsertGuestbookMessageTests
{
public class CommandHandlerTests
{
private readonly Mock<IGuestbookMessageRepository> _repositoryMock;
private readonly InsertGuestbookMessageCommandHandler _handler;
public CommandHandlerTests()
{
_repositoryMock = new Mock<IGuestbookMessageRepository>();
_handler = new InsertGuestbookMessageCommandHandler(_repositoryMock.Object);
}
[Fact]
public async Task Handle_WithValidCommand_InsertsMessage()
{
// Arrange
var command = new InsertGuestbookMessageCommand("Asdrubal", "Perdi!", "captcha-token");
GuestbookMessage? capturedMessage = null;
_repositoryMock.Setup(x => x.AddAsync(It.IsAny<GuestbookMessage>(), It.IsAny<CancellationToken>()))
.Callback<GuestbookMessage, CancellationToken>((message, _) => capturedMessage = message)
.Returns(Task.CompletedTask);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.True(result.Success);
Assert.Empty(result.ErrorMessage!);
Assert.NotNull(capturedMessage);
Assert.Equal("Asdrubal", capturedMessage.Author);
Assert.Equal("Perdi!", capturedMessage.Message);
Assert.True(capturedMessage.Id != Guid.Empty);
Assert.True(capturedMessage.Timestamp <= DateTimeOffset.UtcNow);
_repositoryMock.Verify(x => x.AddAsync(It.IsAny<GuestbookMessage>(), It.IsAny<CancellationToken>()), Times.Once);
}
}
public class InsertGuestbookMessageCommandValidatorTests
{
private readonly Mock<ICaptchaVerifier> _captchaVerifierMock;
private readonly InsertGuestbookMessageCommandValidator _validator;
public InsertGuestbookMessageCommandValidatorTests()
{
_captchaVerifierMock = new Mock<ICaptchaVerifier>();
_validator = new InsertGuestbookMessageCommandValidator(_captchaVerifierMock.Object);
}
[Fact]
public async Task Validate_WithValidCommand_PassesValidation()
{
// Arrange
var command = new InsertGuestbookMessageCommand("Author", "Message", "valid-captcha");
_captchaVerifierMock.Setup(x => x.VerifyAsync("valid-captcha", It.IsAny<CancellationToken>())).ReturnsAsync(true);
// Act
var result = await _validator.ValidateAsync(command);
// Assert
Assert.True(result.IsValid);
Assert.Empty(result.Errors);
}
[Theory]
[InlineData("", "Message", "captcha", "An author is required.")]
[InlineData("Author", "", "captcha", "A message is required.")]
[InlineData("Author", "Message", "", "A captcha response must be sent with the payload.")]
public async Task Validate_WithMissingRequiredFields_ReturnsExpectedErrors(string author, string message, string captcha, string expectedError)
{
// Arrange
var command = new InsertGuestbookMessageCommand(author, message, captcha);
// Act
var result = await _validator.ValidateAsync(command);
// Assert
Assert.False(result.IsValid);
Assert.Contains(result.Errors, error => error.ErrorMessage == expectedError);
}
[Fact]
public async Task Validate_LongAuthor_ReturnsError()
{
// Arrange
var command = new InsertGuestbookMessageCommand(new string('A', 201), "Message", "captcha");
// Act
var result = await _validator.ValidateAsync(command);
// Assert
Assert.False(result.IsValid);
Assert.Contains(result.Errors, error => error.ErrorMessage == "The author field should not exceed 200 characters.");
}
[Fact]
public async Task Validate_LongMessage_ReturnsError()
{
// Arrange
var command = new InsertGuestbookMessageCommand("Author", new string('A', 4097), "captcha");
// Act
var result = await _validator.ValidateAsync(command);
// Assert
Assert.False(result.IsValid);
Assert.Contains(result.Errors, error => error.ErrorMessage == "The message field should not exceed 4096 characters.");
}
[Fact]
public async Task Validate_InvalidCaptcha_ReturnsError()
{
// Arrange
var command = new InsertGuestbookMessageCommand("Author", "Message", "invalid-captcha");
_captchaVerifierMock.Setup(x => x.VerifyAsync("invalid-captcha", It.IsAny<CancellationToken>())).ReturnsAsync(false);
// Act
var result = await _validator.ValidateAsync(command);
// Assert
Assert.False(result.IsValid);
Assert.Contains(result.Errors, error => error.ErrorMessage == "The captcha challenge response was not accepted.");
}
}
public class InsertGuestbookMessageCommandExceptionHandlerTests
{
private readonly InsertGuestbookMessageCommandExceptionHandler _handler;
public InsertGuestbookMessageCommandExceptionHandlerTests()
{
_handler = new InsertGuestbookMessageCommandExceptionHandler();
}
[Fact]
public async Task Handle_WithValidationException_SetsErrorResult()
{
// Arrange
var command = new InsertGuestbookMessageCommand("Author", "Message", "captcha");
var validationFailures = new[]
{
new ValidationFailure("Author", "First error"),
new ValidationFailure("Message", "Second error")
};
var exception = new ValidationException(validationFailures);
var state = new RequestExceptionHandlerState<InsertGuestbookMessageResult>();
// Act
await _handler.Handle(command, exception, state, CancellationToken.None);
// Assert
Assert.True(state.Response != null);
Assert.False(state.Response.Success);
Assert.Equal("First error Second error", state.Response.ErrorMessage);
}
[Fact]
public async Task Handle_WithEmptyValidationErrors_SetsEmptyErrorMessage()
{
// Arrange
var command = new InsertGuestbookMessageCommand("Author", "Message", "captcha");
var exception = new ValidationException(Array.Empty<ValidationFailure>());
var state = new RequestExceptionHandlerState<InsertGuestbookMessageResult>();
// Act
await _handler.Handle(command, exception, state, CancellationToken.None);
// Assert
Assert.True(state.Response != null);
Assert.False(state.Response.Success);
Assert.Empty(state.Response.ErrorMessage);
}
}
}

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tests/Guestbooky.UnitTests/Application/UseCases/ListGuestbookMessagesQueryTests.cs Normal file
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using Guestbooky.Application.UseCases.ListGuestbookMessages;
using Guestbooky.Domain.Abstractions.Repositories;
using Guestbooky.Domain.Entities.Message;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.Application.UseCases;
public class ListGuestbookMessagesQueryHandlerTests
{
private readonly Mock<IGuestbookMessageRepository> _repositoryMock;
private readonly ListGuestbookMessagesQueryHandler _handler;
public ListGuestbookMessagesQueryHandlerTests()
{
_repositoryMock = new Mock<IGuestbookMessageRepository>();
_handler = new ListGuestbookMessagesQueryHandler(_repositoryMock.Object);
}
[Fact]
public async Task Handle_WithMessages_ReturnsList()
{
// Arrange
IEnumerable<GuestbookMessage> messages = new List<GuestbookMessage>
{
GuestbookMessage.CreateExisting(
Guid.Parse("11111111-1111-1111-1111-111111111111"),
"Asdrubal",
"Hello World",
DateTimeOffset.UnixEpoch.AddDays(1)),
GuestbookMessage.CreateExisting(
Guid.Parse("22222222-2222-2222-2222-222222222222"),
"Godolina",
"Perdi",
DateTimeOffset.UnixEpoch.AddDays(2))
};
_repositoryMock.Setup(x => x.GetAsync(0, It.IsAny<CancellationToken>())).ReturnsAsync(messages);
var query = new ListGuestbookMessagesQuery(0);
// Act
var result = await _handler.Handle(query, CancellationToken.None);
// Assert
Assert.NotNull(result.Messages);
var messagesList = result.Messages.ToList();
Assert.Equal(2, messagesList.Count);
Assert.Equal("11111111-1111-1111-1111-111111111111", messagesList[0].Id);
Assert.Equal("Asdrubal", messagesList[0].Author);
Assert.Equal("Hello World", messagesList[0].Message);
Assert.Equal(DateTimeOffset.UnixEpoch.AddDays(1), messagesList[0].Timestamp);
Assert.Equal("22222222-2222-2222-2222-222222222222", messagesList[1].Id);
Assert.Equal("Godolina", messagesList[1].Author);
Assert.Equal("Perdi", messagesList[1].Message);
Assert.Equal(DateTimeOffset.UnixEpoch.AddDays(2), messagesList[1].Timestamp);
}
[Fact]
public async Task Handle_NoItems_ReturnsEmpty()
{
// Arrange
_repositoryMock.Setup(x => x.GetAsync(It.IsAny<int>(), It.IsAny<CancellationToken>())).ReturnsAsync([]);
var query = new ListGuestbookMessagesQuery(It.IsAny<int>());
// Act
var result = await _handler.Handle(query, CancellationToken.None);
// Assert
Assert.NotNull(result.Messages);
Assert.Empty(result.Messages);
}
[Theory]
[InlineData(0)]
[InlineData(10)]
[InlineData(100)]
public async Task Handle_WithDifferentOffsets_PassesOffset(long offset)
{
// Arrange
_repositoryMock.Setup(x => x.GetAsync(offset, It.IsAny<CancellationToken>())).ReturnsAsync(Enumerable.Empty<GuestbookMessage>());
var query = new ListGuestbookMessagesQuery(offset);
// Act
await _handler.Handle(query, CancellationToken.None);
// Assert
_repositoryMock.Verify(x => x.GetAsync(offset, It.IsAny<CancellationToken>()), Times.Once);
}
}

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tests/Guestbooky.UnitTests/Application/UseCases/RefreshTokenCommandTests.cs Normal file
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using Guestbooky.Application.Interfaces;
using Guestbooky.Application.UseCases.RefreshToken;
using Moq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Security.Principal;
using System.Text;
using System.Threading.Tasks;
namespace Guestbooky.UnitTests.Application.UseCases;
public class RefreshTokenCommandHandlerTests
{
private readonly Mock<IRefreshTokenService> _refreshTokenServiceMock;
private readonly Mock<IJwtTokenService> _jwtTokenServiceMock;
private readonly RefreshTokenCommandHandler _handler;
public RefreshTokenCommandHandlerTests()
{
_refreshTokenServiceMock = new Mock<IRefreshTokenService>();
_jwtTokenServiceMock = new Mock<IJwtTokenService>();
_handler = new RefreshTokenCommandHandler(_refreshTokenServiceMock.Object, _jwtTokenServiceMock.Object);
}
[Fact]
public async Task Handle_WithValidRefreshToken_ReturnsToken()
{
// Arrange
const string oldRefreshToken = "old-refresh-token";
const string username = "testuser";
const string newAccessToken = "new-access-token";
const string newRefreshToken = "new-refresh-token";
var claimsPrincipal = new ClaimsPrincipal(new GenericIdentity(username));
_refreshTokenServiceMock.Setup(x => x.ValidateRefreshToken(It.IsAny<string>())).Returns(claimsPrincipal);
_jwtTokenServiceMock.Setup(x => x.GenerateToken(It.IsAny<string>())).Returns(newAccessToken);
_refreshTokenServiceMock.Setup(x => x.GenerateRefreshToken()).Returns(newRefreshToken);
var command = new RefreshTokenCommand(oldRefreshToken);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.True(result.Success);
Assert.Equal(newAccessToken, result.Token);
Assert.Equal(newRefreshToken, result.RefreshToken);
Assert.Null(result.ErrorMessage);
_refreshTokenServiceMock.Verify(x => x.SaveRefreshToken(username, newRefreshToken), Times.Once);
}
[Fact]
public async Task Handle_WithInvalidRefreshToken_ReturnsFailure()
{
// Arrange
const string invalidRefreshToken = "invalid-refresh-token";
_refreshTokenServiceMock.Setup(x => x.ValidateRefreshToken(It.IsAny<string>()))
.Returns((ClaimsPrincipal)null!);
var command = new RefreshTokenCommand(invalidRefreshToken);
// Act
var result = await _handler.Handle(command, CancellationToken.None);
// Assert
Assert.False(result.Success);
Assert.Equal(string.Empty, result.Token);
Assert.Equal(string.Empty, result.RefreshToken);
Assert.Equal("Could not validate the cached refresh token.", result.ErrorMessage);
_jwtTokenServiceMock.Verify(x => x.GenerateToken(It.IsAny<string>()), Times.Never);
_refreshTokenServiceMock.Verify(x => x.GenerateRefreshToken(), Times.Never);
_refreshTokenServiceMock.Verify(x => x.SaveRefreshToken(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
}
}

36
tests/Guestbooky.UnitTests/Guestbooky.UnitTests.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<CollectCoverage>true</CollectCoverage>
<IsPackable>false</IsPackable>
<IsTestProject>true</IsTestProject>
<CoverletOutputFormat>cobertura</CoverletOutputFormat>
<CoverletOutput>$(OutputPath)TestResults/coverage/</CoverletOutput>
<PackageLicenseExpression>AGPL-3.0-or-later</PackageLicenseExpression>
<PackageLicenseFile>..\..\..\LICENSE</PackageLicenseFile>
<Authors>Felipe Cotti</Authors>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="coverlet.collector" Version="6.0.0" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
<PackageReference Include="Moq" Version="4.20.71" />
<PackageReference Include="xunit" Version="2.5.3" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\..\src\Guestbooky\Guestbooky.API\Guestbooky.API.csproj" />
<ProjectReference Include="..\..\src\Guestbooky\Guestbooky.Application\Guestbooky.Application.csproj" />
<ProjectReference Include="..\..\src\Guestbooky\Guestbooky.Domain\Guestbooky.Domain.csproj" />
<ProjectReference Include="..\..\src\Guestbooky\Guestbooky.Infrastructure\Guestbooky.Infrastructure.csproj" />
</ItemGroup>
<ItemGroup>
<Using Include="Xunit" />
</ItemGroup>
</Project>