2490: Refactor module name resolution and file indexing logic.

Streamlined retrieval of module names and their associated files by consolidating logic into `FileBasedIndex` queries. Removed deprecated utility method usages, reducing unnecessary complexity and improving maintainability.

Author: VitaliyBoyko

src/main/java/com/magento/idea/magento2plugin/actions/groups/NewModuleFileGroup.java

@@ -10,14 +10,16 @@
 import com.intellij.openapi.actionSystem.PlatformDataKeys;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.IconLoader;
+import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiDirectory;
 import com.intellij.psi.PsiElement;
+import com.intellij.psi.search.GlobalSearchScope;
+import com.intellij.util.indexing.FileBasedIndex;
 import com.magento.idea.magento2plugin.MagentoIcons;
 import com.magento.idea.magento2plugin.actions.generation.util.IsClickedDirectoryInsideProject;
-import com.magento.idea.magento2plugin.indexes.ModuleIndex;
 import com.magento.idea.magento2plugin.project.Settings;
-import com.magento.idea.magento2plugin.util.magento.GetMagentoModuleUtil;
-import com.magento.idea.magento2plugin.util.magento.GetModuleNameByDirectoryUtil;
+import com.magento.idea.magento2plugin.stubs.indexes.ModuleNameIndex;
+import java.util.Collection;
 
 public class NewModuleFileGroup extends NonTrivialActionGroup {
 
@@ -50,20 +52,31 @@ public void update(final AnActionEvent event) {
             return;
         }
 
-        final String moduleName = GetModuleNameByDirectoryUtil
-                .execute((PsiDirectory) psiElement, project);
+        String moduleName = null;
+        VirtualFile psiDirectoryVirtualFile = ((PsiDirectory) psiElement).getVirtualFile();
 
-        if (moduleName != null) {
-            final PsiDirectory moduleDirectory = new ModuleIndex(project)
-                    .getModuleDirectoryByModuleName(moduleName);
+        for (var entry : FileBasedIndex.getInstance().getAllKeys(ModuleNameIndex.KEY, project)) {
+            Collection<VirtualFile> moduleVfs = FileBasedIndex.getInstance().getContainingFiles(
+                    ModuleNameIndex.KEY, entry, GlobalSearchScope.projectScope(project)
+            );
+
+            for (VirtualFile moduleFile : moduleVfs) {
+                if (moduleFile.getParent().getPath().equals(psiDirectoryVirtualFile.getPath())) {
+                    moduleName = entry;
+                    break;
+                }
+            }
 
-            if (moduleDirectory != null
-                    && GetMagentoModuleUtil.isDirectoryInEditableModule(moduleDirectory)) {
-                event.getPresentation().setVisible(true);
-                return;
+            if (moduleName != null) {
+                break;
             }
         }
 
+        if (moduleName != null) {
+            event.getPresentation().setVisible(true);
+            return;
+        }
+
         event.getPresentation().setVisible(false);
     }
 }

src/main/java/com/magento/idea/magento2plugin/indexes/ModuleIndex.java

@@ -125,18 +125,15 @@ private List<String> getNames(
         }
         final FileBasedIndex index = FileBasedIndex
                 .getInstance();
-        final Collection<VirtualFile> files = new ArrayList<>();
 
-        files.addAll(
-                index.getContainingFiles(
-                        ModuleNameIndex.KEY,
-                        moduleName,
-                        GlobalSearchScope.getScopeRestrictedByFileTypes(
-                                GlobalSearchScope.allScope(project),
-                                PhpFileType.INSTANCE
-                        )
+        final Collection<VirtualFile> files = new ArrayList<>(index.getContainingFiles(
+                ModuleNameIndex.KEY,
+                moduleName,
+                GlobalSearchScope.getScopeRestrictedByFileTypes(
+                        GlobalSearchScope.allScope(project),
+                        PhpFileType.INSTANCE
                 )
-        );
+        ));
 
         if (files.isEmpty()) {
             return null;