feat: moderation API

Foxnouns.Backend/Controllers/NotificationsController.cs

@@ -0,0 +1,52 @@
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Database.Models;
+using Foxnouns.Backend.Middleware;
+using Foxnouns.Backend.Services;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using NodaTime;
+
+namespace Foxnouns.Backend.Controllers;
+
+[Route("/api/v2/notifications")]
+public class NotificationsController(
+    DatabaseContext db,
+    ModerationRendererService moderationRenderer,
+    IClock clock
+) : ApiControllerBase
+{
+    [HttpGet]
+    [Authorize("user.moderation")]
+    [Limit(UsableBySuspendedUsers = true)]
+    public async Task<IActionResult> GetNotificationsAsync([FromQuery] bool all = false)
+    {
+        IQueryable<Notification> query = db.Notifications.Where(n => n.TargetId == CurrentUser!.Id);
+        if (!all)
+            query = query.Where(n => n.AcknowledgedAt == null);
+
+        List<Notification> notifications = await query.OrderByDescending(n => n.Id).ToListAsync();
+
+        return Ok(notifications.Select(moderationRenderer.RenderNotification));
+    }
+
+    [HttpPut("{id}/ack")]
+    [Authorize("user.moderation")]
+    [Limit(UsableBySuspendedUsers = true)]
+    public async Task<IActionResult> AcknowledgeNotificationAsync(Snowflake id)
+    {
+        Notification? notification = await db.Notifications.FirstOrDefaultAsync(n =>
+            n.TargetId == CurrentUser!.Id && n.Id == id
+        );
+        if (notification == null)
+            throw new ApiError.NotFound("Notification not found.");
+
+        if (notification.AcknowledgedAt != null)
+            return Ok(moderationRenderer.RenderNotification(notification));
+
+        notification.AcknowledgedAt = clock.GetCurrentInstant();
+        db.Update(notification);
+        await db.SaveChangesAsync();
+
+        return Ok(moderationRenderer.RenderNotification(notification));
+    }
+}