Warn about uGridsToLoad

Code/client/Games/TES.h

@@ -192,6 +192,7 @@ struct INISettingCollection
         Entry* next;
     };
 
+    // TODO(FT): Setting a setting should be followed by SettingHandlerMap::SettingUpdated() call
     Setting* GetSetting(const char* acpName) noexcept;
 
     uint8_t unk0[0x118];

Code/client/Services/Generic/DiscoveryService.cpp

@@ -251,6 +251,16 @@ void DiscoveryService::OnUpdate(const PreUpdateEvent& acUpdateEvent) noexcept
 
 void DiscoveryService::OnConnected(const ConnectedEvent& acEvent) noexcept
 {
+    // uGridsToLoad should always be 5, as this is what the server enforces
+    auto* pSetting = INISettingCollection::Get()->GetSetting("uGridsToLoad:General");
+    if (pSetting && pSetting->data != 5)
+    {
+        ConnectionErrorEvent errorEvent{};
+        errorEvent.ErrorDetail = "{\"error\": \"bad_uGridsToLoad\"}";
+
+        m_world.GetRunner().Trigger(errorEvent);
+    }
+
     VisitCell(true);
 }
 

Code/skyrim_ui/src/app/services/error.service.ts

@@ -11,6 +11,7 @@ export interface ErrorEvent {
     | 'wrong_password'
     | 'server_full'
     | 'no_reason'
+    | 'bad_uGridsToLoad'
     | 'non_default_install';
   data?: Record<any, any>;
 }

Code/skyrim_ui/src/assets/i18n/en.json

@@ -166,6 +166,7 @@
         "WRONG_PASSWORD": "The password you entered is incorrect.",
         "NO_REASON": "The server refused connection without reason.",
         "SERVER_FULL": "This server is full.",
+        "BAD_UGRIDSTOLOAD": "It seems that your Skyrim.ini file has a non-default value for 'uGridsToLoad'. THIS IS A VERY BAD IDEA, and will most likely break the mod. Please set this setting back to its default (5), or remove the Skyrim.ini file and launch Skyrim vanilla once to generate a new file. The settings 'uExterior Cell Buffer' and 'uInterior Cell Buffer' should also be left at the default setting. If you do not know how to do this, please refer to our wiki or ask on our Discord server/Reddit sub for help.",
         "NON_DEFAULT_INSTALL": "It seems that your installation is not purely vanilla, i.e. it has Creation Club content (Anniversary Update or otherwise) or other mods.\nWe do NOT recommend playing with mods.\nWe recommend that you uninstall and disable these mods (instructions can be found on the wiki).\n\nFor the best experience, you should have the following mod list:<strong>\nSkyrim.esm\nUpdate.esm\nDawnguard.esm\nHearthFires.esm\nDragonborn.esm\n_ResourcePack.esl\nSkyrimTogether.esp</strong>"
       }
     },