feat(chats): add per-user chat archive support

app/chats/service.py

@@ -62,6 +62,8 @@ async def serialize_chat_for_user(db: AsyncSession, *, user_id: int, chat: Chat)
             subscribers_count = members_count
 
     unread_count = await repository.get_unread_count_for_chat(db, chat_id=chat.id, user_id=user_id)
+    user_setting = await repository.get_chat_user_setting(db, chat_id=chat.id, user_id=user_id)
+    archived = bool(user_setting and user_setting.archived)
 
     return ChatRead.model_validate(
         {
@@ -74,6 +76,7 @@ async def serialize_chat_for_user(db: AsyncSession, *, user_id: int, chat: Chat)
             "description": chat.description,
             "is_public": chat.is_public,
             "is_saved": chat.is_saved,
+            "archived": archived,
             "unread_count": unread_count,
             "pinned_message_id": chat.pinned_message_id,
             "members_count": members_count,
@@ -167,14 +170,18 @@ async def get_chats_for_user(
     limit: int = 50,
     before_id: int | None = None,
     query: str | None = None,
+    archived: bool = False,
 ) -> list[Chat]:
     safe_limit = max(1, min(limit, 100))
-    chats = await repository.list_user_chats(db, user_id=user_id, limit=safe_limit, before_id=before_id, query=query)
-    saved = await ensure_saved_messages_chat(db, user_id=user_id)
-    if saved.id not in [c.id for c in chats]:
-        chats = [saved, *chats]
+    if archived:
+        chats = await repository.list_archived_user_chats(db, user_id=user_id, limit=safe_limit, before_id=before_id)
     else:
-        chats = [saved, *[c for c in chats if c.id != saved.id]]
+        chats = await repository.list_user_chats(db, user_id=user_id, limit=safe_limit, before_id=before_id, query=query)
+        saved = await ensure_saved_messages_chat(db, user_id=user_id)
+        if saved.id not in [c.id for c in chats]:
+            chats = [saved, *chats]
+        else:
+            chats = [saved, *[c for c in chats if c.id != saved.id]]
     return chats
 
 
@@ -480,3 +487,17 @@ async def update_chat_notification_settings_for_user(
         user_id=user_id,
         muted=setting.muted,
     )
+
+
+async def set_chat_archived_for_user(
+    db: AsyncSession,
+    *,
+    chat_id: int,
+    user_id: int,
+    archived: bool,
+) -> Chat:
+    chat, _membership = await _get_chat_and_membership(db, chat_id=chat_id, user_id=user_id)
+    await repository.upsert_chat_archived_setting(db, chat_id=chat_id, user_id=user_id, archived=archived)
+    await db.commit()
+    await db.refresh(chat)
+    return chat