Fix typos and check-in Escaper

lib/Alchemy/Phrasea/SearchEngine/Elastic/Search/Escaper.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Alchemy\Phrasea\SearchEngine\Elastic\Search;
+
+class Escaper
+{
+    public function escapeWord($value)
+    {
+        // Strip double quotes from values to prevent broken queries
+        // TODO escape double quotes when it will be supported in query parser
+        $value = str_replace('/["\(\)\[\]]+/u', ' ', $value);
+
+        if (preg_match('/[\s\(\)\[\]]/u', $value)) {
+            return sprintf('"%s"', $value);
+        }
+
+        return $value;
+    }
+}