feat: self-service deletion API, reactivate account page

Foxnouns.Backend/Controllers/DeleteUserController.cs

@@ -0,0 +1,75 @@
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Middleware;
+using Microsoft.AspNetCore.Mvc;
+using NodaTime;
+
+namespace Foxnouns.Backend.Controllers;
+
+[Route("/api/internal/self-delete")]
+[Authorize("*")]
+[ApiExplorerSettings(IgnoreApi = true)]
+public class DeleteUserController(DatabaseContext db, IClock clock, ILogger logger)
+    : ApiControllerBase
+{
+    private readonly ILogger _logger = logger.ForContext<DeleteUserController>();
+
+    [HttpPost("delete")]
+    public async Task<IActionResult> DeleteSelfAsync()
+    {
+        _logger.Information(
+            "User {UserId} has requested their account to be deleted",
+            CurrentUser!.Id
+        );
+
+        CurrentUser.Deleted = true;
+        CurrentUser.DeletedAt = clock.GetCurrentInstant();
+
+        db.Update(CurrentUser);
+        await db.SaveChangesAsync();
+        return NoContent();
+    }
+
+    [HttpPost("force")]
+    [Limit(UsableByDeletedUsers = true)]
+    public async Task<IActionResult> ForceDeleteAsync()
+    {
+        if (!CurrentUser!.Deleted)
+            throw new ApiError.BadRequest("Your account isn't deleted.");
+
+        _logger.Information(
+            "User {UserId} has requested an early full delete of their account",
+            CurrentUser.Id
+        );
+
+        // This is the easiest way to force delete a user, don't judge me
+        CurrentUser.DeletedAt = clock.GetCurrentInstant() - Duration.FromDays(365);
+        db.Update(CurrentUser);
+        await db.SaveChangesAsync();
+        return NoContent();
+    }
+
+    [HttpPost("undelete")]
+    [Limit(UsableByDeletedUsers = true)]
+    public async Task<IActionResult> UndeleteSelfAsync()
+    {
+        if (!CurrentUser!.Deleted)
+            throw new ApiError.BadRequest("Your account isn't deleted.");
+        if (CurrentUser!.DeletedBy != null)
+        {
+            throw new ApiError.BadRequest(
+                "Your account has been suspended and can't be reactivated by yourself."
+            );
+        }
+
+        _logger.Information(
+            "User {UserId} has requested to undelete their account",
+            CurrentUser.Id
+        );
+
+        CurrentUser.Deleted = false;
+        CurrentUser.DeletedAt = null;
+        db.Update(CurrentUser);
+        await db.SaveChangesAsync();
+        return NoContent();
+    }
+}