make update message adjustable by provider

CMakeLists.txt

@@ -48,6 +48,7 @@ set(PRJ_HEADERS
     include/TScopedTimer.h
     include/TServer.h
     include/VehicleData.h
+    include/Env.h
 )
 # add all source files (.cpp) to this, except the one with main()
 set(PRJ_SOURCES
@@ -70,6 +71,7 @@ set(PRJ_SOURCES
     src/TScopedTimer.cpp
     src/TServer.cpp
     src/VehicleData.cpp
+    src/Env.cpp
 )
 
 find_package(Lua REQUIRED)

include/Env.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <optional>
+#include <string>
+namespace Env {
+
+enum class Key {
+    // provider settings
+    PROVIDER_UPDATE_MESSAGE,
+};
+
+std::optional<std::string> Get(Key key);
+
+std::string_view ToString(Key key);
+
+}

src/Common.cpp

@@ -1,8 +1,10 @@
 #include "Common.h"
 
+#include "Env.h"
 #include "TConsole.h"
 #include <array>
 #include <charconv>
+#include <fmt/core.h>
 #include <iostream>
 #include <map>
 #include <regex>
@@ -201,8 +203,11 @@ void Application::CheckForUpdates() {
             auto MyVersion = ServerVersion();
             auto RemoteVersion = Version(VersionStrToInts(Response));
             if (IsOutdated(MyVersion, RemoteVersion)) {
-                std::string RealVersionString = RemoteVersion.AsString();
+                std::string RealVersionString = std::string("v") + RemoteVersion.AsString();
-                beammp_warn(std::string(ANSI_YELLOW_BOLD) + "NEW VERSION IS OUT! Please update to the new version (v" + RealVersionString + ") of the BeamMP-Server! Download it here: https://beammp.com/! For a guide on how to update, visit: https://wiki.beammp.com/en/home/server-maintenance#updating-the-server" + std::string(ANSI_RESET));
+                const std::string DefaultUpdateMsg = "NEW VERSION IS OUT! Please update to the new version ({}) of the BeamMP-Server! Download it here: https://beammp.com/! For a guide on how to update, visit: https://wiki.beammp.com/en/home/server-maintenance#updating-the-server";
+                auto UpdateMsg = Env::Get(Env::Key::PROVIDER_UPDATE_MESSAGE).value_or(DefaultUpdateMsg);
+                UpdateMsg = fmt::vformat(std::string_view(UpdateMsg), fmt::make_format_args(RealVersionString));
+                beammp_warnf("{}{}{}", ANSI_YELLOW_BOLD, UpdateMsg, ANSI_RESET);
             } else {
                 if (FirstTime) {
                     beammp_info("Server up-to-date!");

src/Env.cpp

@@ -0,0 +1,20 @@
+#include "Env.h"
+#include <optional>
+
+std::optional<std::string> Env::Get(Env::Key key) {
+    auto StrKey = ToString(key);
+    auto Value = std::getenv(StrKey.data());
+    if (!Value || std::string_view(Value).empty()) {
+        return std::nullopt;
+    }
+    return Value;
+}
+
+std::string_view Env::ToString(Env::Key key) {
+    switch (key) {
+    case Key::PROVIDER_UPDATE_MESSAGE:
+        return "BEAMMP_PROVIDER_UPDATE_MESSAGE";
+        break;
+    }
+    return "";
+}