added themeing so search form can pass query to landing page of main module

roblib_search.module

@@ -62,6 +62,17 @@ function roblib_search_block_info() {
   );
 }*/
 
+/**
+ * Implements hook_theme().
+ */
+function roblib_search_theme($existing, $type, $theme, $path) {
+  return [
+    'roblib_search_results' => [
+      'variables' => ['query' => NULL],
+    ],
+  ];
+}
+
 
 
 /**

roblib_search.routing.yml

@@ -5,3 +5,12 @@ roblib_search.settings:
     _title: 'Roblib Search Settings Form'
   requirements:
     _permission: 'administer site configuration'
+    
+roblib_search.landing_page:
+  path: '/roblib_search/{query}'
+  defaults:
+    _controller: '\Drupal\roblib_search\Controller\RoblibSearchController::searchResults'
+    _title: 'Roblib Search Landing Page'
+    query: '[a-zA-Z\s]+'
+  requirements:
+    _permission: 'access content'

src/Controller/RoblibSearchController.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Drupal\roblib_search\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+
+/**
+ * Controller for d3 graphs.
+ */
+class RoblibSearchController extends ControllerBase {
+
+  /**
+   * Display the markup.
+   *
+   * @return array
+   *   A renderable array.
+   */
+  public function searchResults($query = NULL) {
+     return [
+      '#theme' => 'roblib_search_results',
+      '#query' => $query,
+    ];
+  }
+
+}

src/Form/RoblibSearchForm.php

@@ -5,6 +5,7 @@ namespace Drupal\roblib_search\Form;
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Component\Utility\Html;
+use Drupal\Core\Url;
 
 /**
  * Config form for module
@@ -63,17 +64,11 @@ class RoblibSearchForm extends FormBase{
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    global $base_url;
-    //$form_state->rebuild(TRUE);
     $search_string = $form_state->getValue('roblib_search_simple_search_query');
     $search_string = Html::escape($search_string);
     //roblib_search_log_query($search_string);
-    $config = \Drupal::config('roblib_search.settings');
-    $redirect_url = $config->get('search_panel_page');
-    $redirect_url = $base_url . '/' . $redirect_url;
-    //TODO redirect to the search page
-    $form_state->setRedirect('<front>');
-    
+    $url = Url::fromUserInput('/roblib_search/' . $search_string);
+    $form_state->setRedirectUrl($url);    
   }
 
 }

templates/roblib-search-results.html.twig

@@ -0,0 +1,3 @@
+<div id="roblib-search-results">
+ {{ query }}
+</div>