Add FieldCaps endpoint

src/Elasticsearch/Client.php

@@ -1344,6 +1344,33 @@ public function fieldStats($params = array())
         return $this->performRequest($endpoint);
     }
 
+    /**
+     * $params['index']              = (list) A comma-separated list of indices to restrict the results
+     *        ['ignore_unavailable'] = (bool) Whether specified concrete indices should be ignored when unavailable (missing or closed)
+     *        ['allow_no_indices']   = (bool) Whether to ignore if a wildcard indices expression resolves into no concrete indices. (This includes `_all` string or when no indices have been specified)
+     *        ['expand_wildcards']   = (enum) Whether to expand wildcard expression to concrete indices that are open, closed or both.
+     *
+     * @param $params array Associative array of parameters
+     *
+     * @return array
+     */
+    public function fieldCaps($params = array())
+    {
+        $index = $this->extractArgument($params, 'index');
+        $body = $this->extractArgument($params, 'body');
+
+        /** @var callback $endpointBuilder */
+        $endpointBuilder = $this->endpoints;
+
+        /** @var \Elasticsearch\Endpoints\FieldCaps $endpoint */
+        $endpoint = $endpointBuilder('FieldCaps');
+        $endpoint->setIndex($index)
+            ->setBody($body)
+            ->setParams($params);
+
+        return $this->performRequest($endpoint);
+    }
+
     /**
      * $params['id']                 = (string) ID of the template to render
      *

src/Elasticsearch/Endpoints/FieldCaps.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace Elasticsearch\Endpoints;
+
+use Elasticsearch\Common\Exceptions\InvalidArgumentException;
+use Elasticsearch\Common\Exceptions;
+
+/**
+ * Class FieldCaps
+ *
+ * @category Elasticsearch
+ * @package  Elasticsearch\Endpoints
+ * @author   Zachary Tong <[email protected]>
+ * @license  http://www.apache.org/licenses/LICENSE-2.0 Apache2
+ * @link     http://elastic.co
+ */
+class FieldCaps extends AbstractEndpoint
+{
+    /**
+     * @param array $body
+     *
+     * @throws \Elasticsearch\Common\Exceptions\InvalidArgumentException
+     * @return $this
+     */
+    public function setBody($body)
+    {
+        if (isset($body) !== true) {
+            return $this;
+        }
+
+        $this->body = $body;
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getURI()
+    {
+        $index = $this->index;
+
+        if (isset($index) === true ) {
+            return "/$index/_field_caps";
+        } else {
+            return "/_field_caps";
+        }
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getParamWhitelist()
+    {
+        return array(
+            'fields',
+            'ignore_unavailable',
+            'allow_no_indices',
+            'expand_wildcards'
+        );
+    }
+
+    /**
+     * @return string
+     */
+    public function getMethod()
+    {
+        return 'GET';
+    }
+}