feat(backend): add support conversations

Foxnouns.Backend/Services/SupportRendererService.cs

@@ -0,0 +1,47 @@
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Database.Models;
+using Foxnouns.Backend.Utils;
+using Newtonsoft.Json;
+
+namespace Foxnouns.Backend.Services;
+
+public class SupportRendererService(UserRendererService userRenderer)
+{
+    public ConversationResponse ToResponse(SupportConversation c) =>
+        new(
+            c.Id,
+            userRenderer.RenderPartialUser(c.User),
+            c.Title,
+            userRenderer.TryRenderPartialUser(c.AssignedTo),
+            c.Status
+        );
+
+    public MessageResponse ToResponse(SupportMessage m, bool modView = false) =>
+        new(
+            m.Id,
+            m.IsAnonymous
+                ? modView
+                    ? userRenderer.RenderPartialUser(m.User)
+                    : null
+                : userRenderer.RenderPartialUser(m.User),
+            m.IsAnonymous,
+            m.Content
+        );
+
+    public record ConversationResponse(
+        Snowflake Id,
+        UserRendererService.PartialUser User,
+        string Title,
+        UserRendererService.PartialUser? AssignedTo,
+        [property: JsonConverter(typeof(ScreamingSnakeCaseEnumConverter))]
+            SupportConversationStatus Status
+    );
+
+    public record MessageResponse(
+        Snowflake Id,
+        [property: JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+            UserRendererService.PartialUser? User,
+        bool IsAnonymous,
+        string? Content
+    );
+}

Foxnouns.Backend/Services/UserRendererService.cs

@@ -92,6 +92,9 @@ public class UserRendererService(
             user.CustomPreferences
         );
 
+    public PartialUser? TryRenderPartialUser(User? user) =>
+        user != null ? RenderPartialUser(user) : null;
+
     private string? AvatarUrlFor(User user) =>
         user.Avatar != null
             ? $"{config.MediaBaseUrl}/users/{user.Id}/avatars/{user.Avatar}.webp"