Fix for backward compatibility with mod loader (#9)

* fix for backward compatibility with ModLoader
* Fix for crash when script creation from file fails.

Author: MiranDMC

source/CScriptEngine.cpp

@@ -983,27 +983,33 @@ namespace CLEO
         }
 
         // [game root]\cleo
-        std::string scriptsDir = CFileMgr::ms_rootDirName;
+        /*std::string scriptsDir = CFileMgr::ms_rootDirName;
         if (!scriptsDir.empty() && scriptsDir.back() != '\\') scriptsDir.push_back('\\');
-        scriptsDir += "cleo";
+        scriptsDir += "cleo";*/
+        std::string scriptsDir = "cleo"; // TODO: restore to absolute path when ModLoader is updated to support CLEO5
 
         TRACE("Searching for cleo scripts");
 
-        FilesWalk(scriptsDir.c_str(), cs_ext, [this](const char* fullPath, const char* filename) {
-            auto cs = LoadScript(fullPath);
-            cs->SetDebugMode(NativeScriptsDebugMode); // inherit from global state
+        CCustomScript* cs = nullptr;
+        FilesWalk(scriptsDir.c_str(), cs_ext, [&](const char* fullPath, const char* filename) {
+            cs = LoadScript(fullPath);
         });
 
-        FilesWalk(scriptsDir.c_str(), cs4_ext, [this](const char* fullPath, const char* filename) {
-            auto cs = LoadScript(fullPath);
+        FilesWalk(scriptsDir.c_str(), cs4_ext, [&](const char* fullPath, const char* filename) {
+            cs = LoadScript(fullPath);
             if (cs) cs->SetCompatibility(CLEO_VER_4);
         });
 
-        FilesWalk(scriptsDir.c_str(), cs3_ext, [this](const char* fullPath, const char* filename) {
-            auto cs = LoadScript(fullPath);
+        FilesWalk(scriptsDir.c_str(), cs3_ext, [&](const char* fullPath, const char* filename) {
+            cs = LoadScript(fullPath);
             if (cs) cs->SetCompatibility(CLEO_VER_3);
         });
 
+        if (cs != nullptr)
+        {
+            cs->SetDebugMode(NativeScriptsDebugMode); // inherit from global state
+        }
+
         for (void* func : GetInstance().GetCallbacks(eCallbackId::ScriptsLoaded))
         {
             typedef void WINAPI callback(void);

source/FileEnumerator.h

@@ -4,7 +4,7 @@
 template<typename T>
 void FilesWalk(const char* directory, const char* extension, T callback)
 {
-    try
+    /*try
     {
         for (auto& it : std::filesystem::directory_iterator(directory))
         {
@@ -28,5 +28,39 @@ void FilesWalk(const char* directory, const char* extension, T callback)
     catch (const std::exception& ex)
     {
         TRACE("Error while iterating directory: %s", ex.what());
+    }*/
+
+    // Re-implemented with raw search APIs for compatibility with ModLoader.
+    // The ModLoader should be updated anyway to solve potential file access problems in more advanced Cleo scripts
+    
+    std::string pattern = directory;
+    if(!pattern.empty() && pattern.back() != '\\') pattern.push_back('\\');
+
+    std::string_view baseDir = pattern;
+    
+    pattern.push_back('*');
+    if (extension != nullptr) pattern.append(extension);
+
+    WIN32_FIND_DATA wfd = { 0 };
+    HANDLE hSearch = FindFirstFile(pattern.c_str(), &wfd);
+
+    if (hSearch == INVALID_HANDLE_VALUE)
+    {
+        TRACE("No files found in: %s", pattern.c_str());
+        return;
     }
+    do
+    {
+        if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+        {
+            continue; // skip directories
+        }
+
+        //auto result = std::filesystem::absolute(std::string(baseDir) + wfd.cFileName);
+        auto result = std::filesystem::path(std::string(baseDir) + wfd.cFileName); // ModLoader supports only relative paths...
+        callback(result.string().c_str(), result.filename().string().c_str());
+
+    } while (FindNextFile(hSearch, &wfd));
+
+    FindClose(hSearch);
 }