factor out check if a token fits current search

[nominatim.git] / lib-php / TokenPostcode.php

diff --git a/lib-php/TokenPostcode.php b/lib-php/TokenPostcode.php
index 563fe7faa36b9f94ad3d83b81db5a973d26cae6d..c0b42fad5ae3fab4b4360f153806e4365f20b357 100644 (file)
--- a/lib-php/TokenPostcode.php
+++ b/lib-php/TokenPostcode.php
@@ -26,6 +26,22 @@ class Postcode
         return $this->iId;
     }
 
+    /**
+     * Check if the token can be added to the given search.
+     * Derive new searches by adding this token to an existing search.
+     *
+     * @param object  $oSearch      Partial search description derived so far.
+     * @param object  $oPosition    Description of the token position within
+                                    the query.
+     *
+     * @return True if the token is compatible with the search configuration
+     *         given the position.
+     */
+    public function isExtendable($oSearch, $oPosition)
+    {
+        return !$oSearch->hasPostcode() && $oPosition->maybePhrase('postalcode');
+    }
+
     /**
      * Derive new searches by adding this token to an existing search.
      *
@@ -39,10 +55,6 @@ class Postcode
     {
         $aNewSearches = array();
 
-        if ($oSearch->hasPostcode() || !$oPosition->maybePhrase('postalcode')) {
-            return $aNewSearches;
-        }
-
         // If we have structured search or this is the first term,
         // make the postcode the primary search element.
         if ($oSearch->hasOperator(\Nominatim\Operator::NONE) && $oPosition->isFirstToken()) {