function onModalWindow(player, modalWindowId, buttonId, choiceId)
    local modalWindow
    for _, window in ipairs(modalWindows.windows) do
        if window.id == modalWindowId then
            modalWindow = window
            break
        end
    end

    if not modalWindow then
        return true
    end

    local playerId = player:getId()
    if not modalWindow.players[playerId] then
        return true
    end
    modalWindow.players[playerId] = nil

    local choice = modalWindow.choices[choiceId]

    for _, button in ipairs(modalWindow.buttons) do
        if button.id == buttonId then
            local callback = button.callback or modalWindow.defaultCallback
            if callback then
                callback(button, choice)
                break
            end
        end
    end

    return true
end