[helper/system] FileRepository: adds findAllFilesInRepository method

Sofa/framework/Helper/src/sofa/helper/system/FileRepository.cpp

@@ -304,6 +304,45 @@ bool FileRepository::findFileFromFile(std::string& filename, const std::string&
     return findFile(filename, SetDirectory::GetParentDir(basefile.c_str()), errlog);
 }
 
+void FileRepository::findAllFilesInRepository(const std::string& path, std::vector<std::string>& files, const std::vector<std::string>& extensions, bool recursive)
+{
+    auto addToFiles = [&files, extensions](const std::filesystem::directory_entry& entry)
+    {
+        if (fs::is_regular_file(entry.path()))
+        {
+            if (extensions.empty() || std::find(extensions.begin(), extensions.end(), entry.path().extension()) != extensions.end())
+            {
+                files.push_back(entry.path().string());
+            }
+        }
+    };
+
+    for (std::vector<std::string>::const_iterator it = vpath.begin(); it != vpath.end(); ++it)
+    {
+        // Get the full / absolute path (vpath + path)
+        const std::string fullPath = SetDirectory::GetRelativeFromDir(path.c_str(), it->c_str());
+        fs::path p = fs::path(fullPath);
+
+        if (fs::exists(p) && fs::is_directory(p))
+        {
+            if (recursive)
+            {
+                for (auto& entry : fs::recursive_directory_iterator(p))
+                {
+                    addToFiles(entry);
+                }
+            }
+            else
+            {
+                for (auto& entry : fs::directory_iterator(p))
+                {
+                    addToFiles(entry);
+                }
+            }
+        }
+    }
+}
+
 void FileRepository::print()
 {
     for (std::vector<std::string>::const_iterator it = vpath.begin(); it != vpath.end(); ++it)

Sofa/framework/Helper/src/sofa/helper/system/FileRepository.h

@@ -135,13 +135,20 @@ class SOFA_HELPER_API FileRepository
         findFile(filename, basedir, errlog);
         return filename;
     }
-
+    
     /// Find file using the stored set of paths.
     /// @param basefile override current directory by using the parent directory of the given file
     /// @param filename requested file as input, resolved file path as output
     /// @return true if the file was found in one of the directories, false otherwise
     bool findFileFromFile(std::string& filename, const std::string& basefile, std::ostream* errlog=&std::cerr);
 
+    /// Find all files in the repository under the given path.
+    /// @param path Path in vpath to search into.
+    /// @param files Output vector of found files.
+    /// @param extensions Extension filter (e.g. ".txt"), empty string means no filter.
+    /// @param recursive Indicates whether to search recursively into sub-directories.
+    void findAllFilesInRepository(const std::string& path, std::vector<std::string>& files, const std::vector<std::string> &extensions, bool recursive=true);
+
     /// Print the list of path to std::cout
     void print();