Merge remote-tracking branch 'upstream/master'

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

diff --git a/lib-php/TokenSpecialTerm.php b/lib-php/TokenSpecialTerm.php
index 89dfa02619447f78106eb16eb2139e8557c8ab4b..5b2d4c70a64f75de8971da78500bc2b8ad65e331 100644 (file)
--- a/lib-php/TokenSpecialTerm.php
+++ b/lib-php/TokenSpecialTerm.php
@@ -10,13 +10,13 @@ require_once(CONST_LibDir.'/SpecialSearchOperator.php');
 class SpecialTerm
 {
     /// Database word id, if applicable.
-    public $iId;
+    private $iId;
     /// Class (or OSM tag key) of the place to look for.
-    public $sClass;
+    private $sClass;
     /// Type (or OSM tag value) of the place to look for.
-    public $sType;
+    private $sType;
     /// Relationship of the operator to the object (see Operator class).
-    public $iOperator;
+    private $iOperator;
 
     public function __construct($iID, $sClass, $sType, $iOperator)
     {
@@ -31,6 +31,22 @@ class SpecialTerm
         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->hasOperator() && $oPosition->isPhrase('');
+    }
+
     /**
      * Derive new searches by adding this token to an existing search.
      *
@@ -42,10 +58,6 @@ class SpecialTerm
      */
     public function extendSearch($oSearch, $oPosition)
     {
-        if ($oSearch->hasOperator() || !$oPosition->isPhrase('')) {
-            return array();
-        }
-
         $iSearchCost = 2;
 
         $iOp = $this->iOperator;