chats: add chat avatars and profile view-only modal

app/chats/service.py

@@ -15,6 +15,7 @@ from app.chats.schemas import (
     ChatNotificationSettingsUpdate,
     ChatInviteLinkRead,
     ChatPinMessageRequest,
+    ChatProfileUpdateRequest,
     ChatRead,
     ChatTitleUpdateRequest,
 )
@@ -40,6 +41,16 @@ async def _can_view_last_seen(*, db: AsyncSession, target_user, viewer_user_id:
     return await is_user_in_contacts(db, owner_user_id=target_user.id, candidate_user_id=viewer_user_id)
 
 
+async def _can_view_avatar(*, db: AsyncSession, target_user, viewer_user_id: int) -> bool:
+    if target_user.id == viewer_user_id:
+        return True
+    if target_user.privacy_avatar == "everyone":
+        return True
+    if target_user.privacy_avatar == "nobody":
+        return False
+    return await is_user_in_contacts(db, owner_user_id=target_user.id, candidate_user_id=viewer_user_id)
+
+
 async def _can_invite_to_group(*, db: AsyncSession, target_user, actor_user_id: int) -> bool:
     if target_user.id == actor_user_id:
         return False
@@ -66,6 +77,7 @@ async def serialize_chat_for_user(
     counterpart_user_id: int | None = None
     counterpart_name: str | None = None
     counterpart_username: str | None = None
+    counterpart_avatar_url: str | None = None
     counterpart_is_online: bool | None = None
     counterpart_last_seen_at = None
     if chat.is_saved:
@@ -81,6 +93,8 @@ async def serialize_chat_for_user(
                 counterpart_username = counterpart.username
                 presence_allowed = await _can_view_last_seen(db=db, target_user=counterpart, viewer_user_id=user_id)
                 counterpart_last_seen_at = counterpart.last_seen_at if presence_allowed else None
+                avatar_allowed = await _can_view_avatar(db=db, target_user=counterpart, viewer_user_id=user_id)
+                counterpart_avatar_url = counterpart.avatar_url if avatar_allowed else None
             presence = await get_users_online_map([counterpart_id])
             if counterpart:
                 presence_allowed = await _can_view_last_seen(db=db, target_user=counterpart, viewer_user_id=user_id)
@@ -114,6 +128,7 @@ async def serialize_chat_for_user(
             "public_id": chat.public_id,
             "type": chat.type,
             "title": chat.title,
+            "avatar_url": chat.avatar_url,
             "display_title": display_title,
             "handle": chat.handle,
             "description": chat.description,
@@ -130,6 +145,7 @@ async def serialize_chat_for_user(
             "counterpart_user_id": counterpart_user_id,
             "counterpart_name": counterpart_name,
             "counterpart_username": counterpart_username,
+            "counterpart_avatar_url": counterpart_avatar_url,
             "counterpart_is_online": counterpart_is_online,
             "counterpart_last_seen_at": counterpart_last_seen_at,
             "last_message_text": last_message.text if last_message else None,
@@ -300,6 +316,29 @@ async def update_chat_title_for_user(
     return chat
 
 
+async def update_chat_profile_for_user(
+    db: AsyncSession,
+    *,
+    chat_id: int,
+    user_id: int,
+    payload: ChatProfileUpdateRequest,
+) -> Chat:
+    chat, membership = await _get_chat_and_membership(db, chat_id=chat_id, user_id=user_id)
+    _ensure_group_or_channel(chat.type)
+    _ensure_manage_permission(membership.role)
+
+    if payload.title is not None:
+        chat.title = payload.title.strip() or chat.title
+    if payload.description is not None:
+        chat.description = payload.description.strip() or None
+    if payload.avatar_url is not None:
+        chat.avatar_url = payload.avatar_url.strip() or None
+
+    await db.commit()
+    await db.refresh(chat)
+    return chat
+
+
 async def add_chat_member_for_user(
     db: AsyncSession,
     *,
@@ -454,6 +493,7 @@ async def discover_public_chats_for_user(db: AsyncSession, *, user_id: int, quer
                 "public_id": chat.public_id,
                 "type": chat.type,
                 "title": chat.title,
+                "avatar_url": chat.avatar_url,
                 "handle": chat.handle,
                 "description": chat.description,
                 "is_public": chat.is_public,