FEATURE: add parent class for all search engines

app/Handlers/Search/Content.php

@@ -1,10 +1,9 @@
 <?php
 namespace App\Handlers\Search;
 
-use App\Handlers\Contracts\SearchHandler;
 use App\Models\Content as ContentModel;
 
-class Content implements SearchHandler
+class Content extends Search
 {
     /**
      * Search for given patttern/term
@@ -15,14 +14,14 @@ class Content implements SearchHandler
      */
     public function search($term)
     {
-        $token = '%' . $term . '%';
+        $token = $this->tokenize($term);
 
         return ContentModel::where('content', 'LIKE', $token)
-                      ->orWhere('meta_description', 'LIKE', $token)
+                           ->orWhere('meta_description', 'LIKE', $token)
-                      ->orWhere('meta_keywords', 'LIKE', $token)
+                           ->orWhere('meta_keywords', 'LIKE', $token)
-                      ->orWhere('title', 'LIKE', $token)
+                           ->orWhere('title', 'LIKE', $token)
-                      ->orWhere('url', 'LIKE', $token)
+                           ->orWhere('url', 'LIKE', $token)
-                      ->get();
+                           ->get();
     }
 
     public function getId()

app/Handlers/Search/Search.php

@@ -0,0 +1,26 @@
+<?php
+namespace App\Handlers\Search;
+
+use App\Handlers\Contracts\SearchHandler;
+use Symfony\Component\Process\Exception\InvalidArgumentException;
+
+abstract class Search implements SearchHandler
+{
+    /**
+     * Tokenize string for usage in LIKE clausules
+     *
+     * @param $term
+     *
+     * @return string
+     */
+    protected function tokenize($term)
+    {
+        $term = trim($term);
+
+        if (empty($term)) {
+            throw new InvalidArgumentException(trans('search.emptyString'));
+        }
+
+        return '%' . str_replace(' ', '%', $term) . '%';
+    }
+}