Merge pull request #143 from gmatthew/master

Added GeoDistance Facet support

lib/Elastica/Facet/GeoDistance.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Implements the Geo Distance facet.
+ *
+ * @category Xodoa
+ * @package Elastica
+ * @author Gerard A. Matthew  <gerard.matthew@gmail.com>
+ * @linkhttp://www.elasticsearch.org/guide/reference/api/search/facets/geo-distance-facet.html
+ */
+
+class Elastica_Facet_GeoDistance extends Elastica_Facet_Abstract {
+
+	/**
+	 * Sets the ranges for the facet all at once.
+	 * Sample ranges:
+	 * array (
+	 * array('to' => 50),
+	 * array('from' => 20, 'to' => 70),
+	 * array('from' => 70, 'to' => 120),
+	 * array('from' => 150)
+	 * )
+	 *
+	 * @param array $ranges	Numerical array with range definitions.
+	 * @return Elastica_Facet_GeoDistance
+	 */
+	public function setRanges(array $ranges) {
+		return $this->setParam ( 'ranges', $ranges );
+	}
+
+	/**
+	 * Set the relative GeoPoint for the facet.
+	 *
+	 * @param string $typeField index type and field e.g foo.bar
+	 * @param float $latitude        	
+	 * @param float $longitude        	
+	 * @return Elastica_Facet_GeoDistance
+	 */
+	public function setGeoPoint($typeField, $latitude, $longitude) {
+		return $this->setParam ( $typeField, array (
+				"lat" => $latitude,
+				"lon" => $longitude 
+		) );
+	}
+
+	/**
+	 * Creates the full facet definition, which includes the basic
+	 * facet definition of the parent.
+	 *
+	 * @see Elastica_Facet_Abstract::toArray()
+	 * @throws Elastica_Exception_Invalid When the right fields haven't been set.
+	 * @return array
+	 */
+	public function toArray() {
+		/**
+		 * Set the geo_distance in the abstract as param.
+		 */
+		$this->_setFacetParam ( 'geo_distance', $this->_params );
+		return parent::toArray ();
+	}
+}