purchase notify, fix preview

app/core/background/indexer_service.py

@@ -47,12 +47,28 @@ async def indexer_loop(memory, platform_found: bool, seqno: int) -> [bool, int]:
             if not licensed_content:
                 make_log("Indexer", f"Licensed content not found: {new_license.content_id}", level="error")
 
+            content_metadata = licensed_content.metadata_json(session)
+            assert content_metadata, "No content metadata found"
+
             try:
                 user = new_license.user
                 if user.telegram_id and licensed_content:
                     await (Wrapped_CBotChat(memory._client_telegram_bot, chat_id=user.telegram_id, user=user, db_session=session)).send_content(
                         session, licensed_content
                     )
+
+                for wallet_owner_connection in session.query(WalletConnection).filter_by(wallet_address=licensed_content.owner_address).all():
+                    wallet_owner_user = wallet_owner_connection.user
+                    if wallet_owner_user.telegram_id:
+                        wallet_owner_bot = Wrapped_CBotChat(memory._client_telegram_bot, chat_id=wallet_owner_user.telegram_id, user=wallet_owner_user, db_session=session)
+                        await wallet_owner_bot.send_message(
+                            user.translated('p_licenseWasBought').format(
+                                username=user.front_format(),
+                                nft_address=f'"{new_license.onchain_address}"',
+                                content_title=content_metadata.get('name', 'Unknown'),
+                            ),
+                            message_type='notification',
+                        )
             except BaseException as e:
                 make_log("IndexerSendNewLicense", f"Error: {e}" + '\n' + traceback.format_exc(), level="error")