Resolve #3323102 "Drush command 1.x"

Closes #3323102

src/Commands/MenuExportDrushCommands.php

+<?php
+
+namespace Drupal\menu_export\Commands;
+
+use Drush\Commands\DrushCommands;
+use Drupal\menu_export\Form\MenuExportForm;
+use Drupal\menu_export\Form\MenuImportForm;
+
+/**
+ * Drush commands for importing / exporting menu items from / to config.
+ *
+ * @package Drupal\menu_export\Commands
+ */
+class MenuExportDrushCommands extends DrushCommands {
+
+  /**
+   * Drush command for exporting menu items to config using default configuration.
+   *
+   * @command menu_export:export
+   * @aliases menu-export-export menu_export-export
+   * @usage menu_export:export
+   */
+  public function export() {
+    $form = new MenuExportForm(\Drupal::configFactory());
+    if ($form->exportMenus()) {
+      $this->output()->writeln(t('Menu(s) exported successfully'));
+    }
+    else {
+      throw new \Exception(t('Menu export did NOT work.'));
+    }
+  }
+
+  /**
+   * Drush command for importing menu items to config using default config.
+   *
+   * @command menu_export:import
+   * @aliases menu-export-import menu_export-import
+   * @usage menu_export:import
+   */
+  public function import() {
+    $form = new MenuImportForm(\Drupal::configFactory());
+    $invalidMenus = $form->importMenus();
+
+    if (count($invalidMenus) == 0) {
+      $this->output()->writeln(t('Menu(s) imported successfully'));
+    }
+    else {
+      throw new \Exception(t('Menu(s) @menus not found',[
+          '@menus'=>implode(',',$invalidMenus)
+        ]));
+    }
+  }
+
+}