Allow WorldCat lat/lon configuration.

config/vufind/WorldCat.ini

@@ -73,6 +73,10 @@ view=full
 ; This section contains additional settings to pass to the WorldCat connector
 ; code.
 [Connector]
+; Set this to the latitude,longitude position of your library to ensure that
+; custom holding locations are retrieved from your region first.
+;latLon = "40.0373881,-75.3442107"
+
 ; When looking up holdings at other libraries, should we retrieve holdings for
 ; any record matching the FRBR group (true) or only for exact matches (false)?
 ;useFrbrGroupingForHoldings = false
\ No newline at end of file

module/VuFindSearch/src/VuFindSearch/Backend/WorldCat/Connector.php

@@ -89,6 +89,10 @@ class Connector extends \VuFindSearch\Backend\SRU\Connector
         }
         $uri = "http://www.worldcat.org/webservices/catalog/content/libraries/{$id}"
             . "?wskey={$this->wskey}&servicelevel=full&frbrGrouping=$grouping";
+        if (isset($this->options['latLon'])) {
+            list($lat, $lon) = explode(',', $this->options['latLon']);
+            $uri .= '&lat=' . urlencode($lat) . '&lon=' . urlencode($lon);
+        }
         $this->client->setUri($uri);
         $this->debug('Connect: ' . $uri);
         $result = $this->client->setMethod('POST')->send();