feat(api): add /refresh [AllowAnonymous] and /logout [Authorize] endpoints to AuthController

src/api/SIGCM2.Api/Controllers/AuthController.cs

@@ -1,7 +1,11 @@
+using System.IdentityModel.Tokens.Jwt;
 using FluentValidation;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using SIGCM2.Application.Abstractions;
 using SIGCM2.Application.Auth.Login;
+using SIGCM2.Application.Auth.Logout;
+using SIGCM2.Application.Auth.Refresh;
 
 namespace SIGCM2.Api.Controllers;
 
@@ -10,19 +14,22 @@ namespace SIGCM2.Api.Controllers;
 public sealed class AuthController : ControllerBase
 {
     private readonly IDispatcher _dispatcher;
-    private readonly IValidator<LoginCommand> _validator;
+    private readonly IValidator<LoginCommand> _loginValidator;
+    private readonly IValidator<RefreshCommand> _refreshValidator;
 
-    public AuthController(IDispatcher dispatcher, IValidator<LoginCommand> validator)
+    public AuthController(
+        IDispatcher dispatcher,
+        IValidator<LoginCommand> loginValidator,
+        IValidator<RefreshCommand> refreshValidator)
     {
         _dispatcher = dispatcher;
-        _validator = validator;
+        _loginValidator = loginValidator;
+        _refreshValidator = refreshValidator;
     }
 
-    /// <summary>Authenticates a user and returns a JWT access token.</summary>
+    /// <summary>Authenticates a user and returns a JWT access token + refresh token.</summary>
-    /// <response code="200">Returns access token and refresh token.</response>
-    /// <response code="400">Validation error — missing or empty fields.</response>
-    /// <response code="401">Invalid credentials.</response>
     [HttpPost("login")]
+    [AllowAnonymous]
     [ProducesResponseType(typeof(LoginResponseDto), StatusCodes.Status200OK)]
     [ProducesResponseType(StatusCodes.Status400BadRequest)]
     [ProducesResponseType(StatusCodes.Status401Unauthorized)]
@@ -30,7 +37,7 @@ public sealed class AuthController : ControllerBase
     {
         var command = new LoginCommand(request.Username ?? string.Empty, request.Password ?? string.Empty);
 
-        var validation = await _validator.ValidateAsync(command);
+        var validation = await _loginValidator.ValidateAsync(command);
         if (!validation.IsValid)
         {
             var errors = validation.Errors
@@ -42,7 +49,56 @@ public sealed class AuthController : ControllerBase
         var result = await _dispatcher.Send<LoginCommand, LoginResponseDto>(command);
         return Ok(result);
     }
+
+    /// <summary>
+    /// Rotates a refresh token pair. Accepts an expired access token to extract the user identity.
+    /// Returns a new access + refresh token pair. Does NOT require Authorization header.
+    /// </summary>
+    [HttpPost("refresh")]
+    [AllowAnonymous]
+    [ProducesResponseType(typeof(RefreshResponseDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<IActionResult> Refresh([FromBody] RefreshRequest request)
+    {
+        var command = new RefreshCommand(
+            request.AccessToken ?? string.Empty,
+            request.RefreshToken ?? string.Empty);
+
+        var validation = await _refreshValidator.ValidateAsync(command);
+        if (!validation.IsValid)
+        {
+            var errors = validation.Errors
+                .GroupBy(e => e.PropertyName)
+                .ToDictionary(g => g.Key, g => g.Select(e => e.ErrorMessage).ToArray());
+            return BadRequest(new { errors });
+        }
+
+        var result = await _dispatcher.Send<RefreshCommand, RefreshResponseDto>(command);
+        return Ok(result);
+    }
+
+    /// <summary>
+    /// Revokes all active refresh tokens for the authenticated user.
+    /// Requires a valid Bearer access token. Client must discard local tokens after this call.
+    /// </summary>
+    [HttpPost("logout")]
+    [Authorize]
+    [ProducesResponseType(typeof(LogoutResponseDto), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status401Unauthorized)]
+    public async Task<IActionResult> Logout()
+    {
+        var sub = User.FindFirst(JwtRegisteredClaimNames.Sub)?.Value;
+        if (!int.TryParse(sub, out var userId))
+            return Unauthorized();
+
+        var result = await _dispatcher.Send<LogoutCommand, LogoutResponseDto>(new LogoutCommand(userId));
+        return Ok(result);
+    }
 }
 
 /// <summary>Login request body — nullable to catch missing field scenarios.</summary>
 public sealed record LoginRequest(string? Username, string? Password);
+
+/// <summary>Refresh request body.</summary>
+public sealed record RefreshRequest(string? AccessToken, string? RefreshToken);