--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/facetapi/query_type_geo.inc	Mon Jun 08 10:21:54 2015 +0200
@@ -0,0 +1,84 @@
+<?php
+
+/**
+ * Plugin for "apachesolr_geo" query types.
+ */
+class solrsearchFacetapiGeo extends FacetapiQueryType implements FacetapiQueryTypeInterface {
+  // Center point is Denver.
+  public $center_point = '39.7391667,-104.9841667';
+  public $facet_options = '0.5,0.1,0.01';
+  public $default_radius = 100;
+
+  /**
+   * Returns the query type associated with the plugin.
+   *
+   * @return string
+   *   The query type.
+   */
+  static public function getType() {
+    return 'geo';
+  }
+
+  /**
+   * Adds the filter to the query object.
+   *
+   * @param DrupalSolrQueryInterface $query
+   *   An object containing the query in the backend's native API.
+   */
+  public function execute($query) {
+    // Retrieve settings of the facet.
+    // We should be able to get all constants as facet options.
+    $settings = $this->adapter->getFacet($this->facet)->getSettings();
+
+    $facet_distances = explode(',', $this->facet_options);
+
+    $active_items = $this->adapter->getActiveItems($this->facet);
+
+    if (empty($active_items)) {
+      $distance = $this->default_radius;
+    }
+    else {
+      $active_item = array_pop($active_items);
+      $distance = substr($active_item['value'], 1);
+      // Add current selected distance to have possibility to unselect it.
+      $facet_distances[] = 1;
+    }
+
+    // Search center point.
+    $query->addParam('pt', $this->center_point);
+
+    // Set location field name.
+    $query->addParam('sfield', $this->facet['field']);
+    $query->addParam('fq', '{!geofilt sfield=' . $this->facet['field'] . '}');
+
+    // Set search radius.
+    $query->addParam('d', $distance);
+
+    // Set facets.
+    foreach ($facet_distances as $facet_option) {
+      $facet_distance = $distance * $facet_option;
+      $query->addParam('facet.query', '{!geofilt d=' . $facet_distance . ' key=d' . $facet_distance . '}');
+    }
+  }
+
+  /**
+   * Initializes the facet's build array.
+   *
+   * @return array
+   *   The initialized render array.
+   */
+  public function build() {
+    $build = array();
+    if ($response = apachesolr_static_response_cache($this->adapter->getSearcher())) {
+      if (isset($response->facet_counts->facet_queries)) {
+        foreach ($response->facet_counts->facet_queries as $value => $count) {
+          // Skip zero results values.
+          if ($count > 0) {
+            $build[$value] = array('#count' => $count);
+          }
+        }
+      }
+    }
+    return $build;
+  }
+}