op-CustomInterfacesLoader/main.as

const array<string> C_ModuleToDisable = {
    "UIModule_ChampionSpring2022_MatchInfo",
    "UIModule_ChampionSpring2022_ScoresHeader",
    "UIModule_ChampionSpring2022_Sponsors",
    "UIModule_ChampionCup_LiveRanking",
    "UIModule_ChampionCup_SpectatorInfo",
    "UIModule_ChampionCup_Chat",
    "UIModule_ChampionCup_MapInfo",
    "UIModule_ChampionCup_Countdown",
    "UIModule_Race_ScoresTable",
    "UIModule_ChampionCup_Sign16x9_1",
    "UIModule_ChampionCup_Sign16x9_2",
    "UIModule_ChampionCup_Sign16x9_3",
    "UIModule_ChampionCup_Sign16x9_4",
    "UIModule_ChampionCup_Sign16x9_5",
    "UIModule_ChampionCup_Sign64x10_64x10_Start",
    "UIModule_ChampionCup_Sign64x10_64x10_Finish",
    "UIModule_ChampionCup_Sign64x10_64x10_Checkpoint",
    "UIModule_ChampionCup_Sign2x3_1"
};

void Main() {
    auto Network = cast<CTrackManiaNetwork>(GetApp().Network);

    /**
     * Unload already loaded custom UI
     */
    if (Network.ClientManiaAppPlayground !is null) {
        CGameManiaAppPlayground @ManiaApp = Network.ClientManiaAppPlayground;
        array<string> Manialinks = GetManialinkFiles();

        array<string> CustomInterfacesIds;

        for (uint i = 0; i < Manialinks.Length; i++) {
            CustomInterfacesIds.InsertLast(Path::GetFileNameWithoutExtension(Manialinks[i]));
        }

        MwFastBuffer<CGameUILayer@> UILayers = ManiaApp.UILayers;

        for (uint i = 0; i < UILayers.Length; i++) {
            CGameUILayer @UILayer = UILayers[i];
            string ManialinkPage = UILayer.ManialinkPage;
            array<string> FirstLines = ManialinkPage.Split("\n", 5);
            if (FirstLines.Length > 0) {
                for (uint j = 0; j < FirstLines.Length - 1; j++) {
                    if (FirstLines[j].Contains('<manialink ')) {
                        string[] match = Regex::Search(FirstLines[j], 'name="(\\w*)"');
                        if (match.Length == 2) {
                            string LayerId = match[1];

                            if (LayerId.StartsWith('Custom_TMWC2024_')) {
                                if (CustomInterfacesIds.Find(LayerId) > -1) {
                                    print("Updating existing layer " + LayerId);
                                    UILayer.ManialinkPage = GetManialinkPage(LayerId);
                                } else {
                                    print("Destroying not existing layer " + LayerId);
                                    ManiaApp.UILayerDestroy(UILayer);
                                }
                            }
                        }
                    }
                }
            }                   
        }
    }

    uint count = 0;

    while(true) {
        yield();    
        if (Network.ClientManiaAppPlayground !is null) {
            CGameManiaAppPlayground @ManiaApp = Network.ClientManiaAppPlayground;
            MwFastBuffer<CGameUILayer@> UILayers = ManiaApp.UILayers;

            if (count != UILayers.Length) {
                print('Walking through UILayers');

                array<string> CustomUIModulesLoaded = {};

                for (uint i = 0; i < UILayers.Length; i++) {
                    CGameUILayer @UILayer = UILayers[i];
                    string ManialinkPage = UILayer.ManialinkPage;
                    array<string> FirstLines = ManialinkPage.Split("\n", 5);
                    if (FirstLines.Length > 0) {
                        for (uint j = 0; j < FirstLines.Length - 1; j++) {
                            if (FirstLines[j].Contains('<manialink ')) {
                                string[] match = Regex::Search(FirstLines[j], 'name="(\\w*)"');
                                if (match.Length == 2) {
                                    string id = match[1];

                                    /**
                                     * Delete UI
                                     */
                                    if (C_ModuleToDisable.Find(id) > -1) {
                                        print('Deleting ' + id);
                                        ManiaApp.UILayerDestroy(UILayers[i]);
                                    }

                                    if (id.StartsWith('Custom_TMWC2024_')) {
                                        CustomUIModulesLoaded.InsertLast(id);
                                    }
                                }
                            }
                        }
                    }                   
                }

                array<string> Manialinks = GetManialinkFiles();

                for (uint i = 0; i < Manialinks.Length; i++) {
                    string FilePath = Manialinks[i];
                    string FileName = Path::GetFileName(FilePath);
                    if (FileName.EndsWith('.xml')) {
                        string LayerId = Path::GetFileNameWithoutExtension(FileName);
                        if (CustomUIModulesLoaded.Find(LayerId) == -1) {
                            print("Loading layer " + LayerId);
                            CGameUILayer @UILayer = ManiaApp.UILayerCreate();
                            UILayer.ManialinkPage = GetManialinkPage(LayerId);

                            if (LayerId.Contains("_Sign16x9Small") || LayerId.Contains("_Sign155Small")) {
                                UILayer.Type = CGameUILayer::EUILayerType::ScreenIn3d;
                                UILayer.AttachId = "155_StadiumSmall";
                            } else if (LayerId.Contains("_Sign16x9") || LayerId.Contains("_Sign155")) {
                                UILayer.Type = CGameUILayer::EUILayerType::ScreenIn3d;
                                UILayer.AttachId = "155_Stadium";
                            } else if (LayerId.Contains("_Sign2x3")) {
                                UILayer.Type = CGameUILayer::EUILayerType::ScreenIn3d;
                                UILayer.AttachId = "2x3_Stadium";
                            } else if (LayerId.Contains("_Markers")) {
                                UILayer.Type = CGameUILayer::EUILayerType::Markers;
                            }
                        }
                    }
                }

                count = ManiaApp.UILayers.Length;
            }
        } else {
            count = 0;
        }
    }
}

array<string> GetManialinkFiles() {
    return IO::IndexFolder(Meta::ExecutingPlugin().SourcePath + '/Manialinks/', false);
}

string GetManialinkPage(string _Id) {
    IO::FileSource Xml('Manialinks/' + _Id + '.xml');
    return Xml.ReadToEnd();
}