Add support of autocomplete endpoint

docs/usage.md

@@ -18,6 +18,8 @@ Table of Contents
 
 * [Bulk operations with documents](#bulk)
 
+* [Autocomplete](#autocomplete)
+
 * [Percolate searches](percolate.md)
 
 * [Keyword helpers](queryhelpers.md)
@@ -192,4 +194,23 @@ $doc = [
 
 $response = $client->bulk($doc);
 ```
-<!-- proofread -->
+
+### Autocomplete
+
+For a complete reference of payload and response, see Manticore's [Autocomplete manual](https://manual.manticoresearch.com).
+
+The request requires `query` and `table` defined as required parameters.
+
+```
+$request = [
+[
+    'body' => [
+        'query' => 'hello wo',
+        'table' => 'testrt',
+    ],
+];
+
+$response = $client->autocomplete($request);
+```
+
+<!-- proofread -->

src/Manticoresearch/Client.php

@@ -344,6 +344,18 @@ public function keywords(array $params = []) {
 		return $response->getResponse();
 	}
 
+	/**
+	 * Endpoint: autocomplete
+	 * @param array $params
+	 * @return mixed
+	 */
+	public function autocomplete(array $params = []) {
+		$endpoint = new Endpoints\Autocomplete($params);
+		$response = $this->request($endpoint);
+
+		return $response->getResponse();
+	}
+
 	public function explainQuery(array $params = []) {
 		$endpoint = new Endpoints\ExplainQuery();
 		$endpoint->setIndex($params['index']);

src/Manticoresearch/Endpoints/Autocomplete.php

@@ -0,0 +1,50 @@
+<?php
+
+// Copyright (c) Manticore Software LTD (https://manticoresearch.com)
+//
+// This source code is licensed under the MIT license found in the
+// LICENSE file in the root directory of this source tree.
+
+namespace Manticoresearch\Endpoints;
+
+use Manticoresearch\Request;
+
+/**
+ * Class Autocomplete
+ * @package Manticoresearch\Endpoints
+ */
+class Autocomplete extends Request
+{
+	/**
+	 * @return mixed|string
+	 */
+	public function getPath() {
+		return '/autocomplete';
+	}
+
+	/**
+	 * @return mixed|string
+	 */
+	public function getMethod() {
+		return 'POST';
+	}
+
+	/**
+	 * @return mixed|string
+	 */
+	public function getContentType() {
+		return 'application/json';
+	}
+
+	/**
+	 * @param mixed $body
+	 */
+	public function setBody($body = null) {
+		if (is_array($body)) {
+			$this->body = json_encode($body, true);
+		} else {
+			$this->body = $body;
+		}
+	}
+
+}

test/Manticoresearch/Endpoints/AutocompleteTest.php

@@ -0,0 +1,22 @@
+<?php
+
+// Copyright (c) Manticore Software LTD (https://manticoresearch.com)
+//
+// This source code is licensed under the MIT license found in the
+// LICENSE file in the root directory of this source tree.
+
+namespace Manticoresearch\Test\Endpoints;
+
+class AutocompleteTest extends \PHPUnit\Framework\TestCase
+{
+
+	public function testGetPath() {
+		$replace = new \Manticoresearch\Endpoints\Autocomplete();
+		$this->assertEquals('/autocomplete', $replace->getPath());
+	}
+
+	public function testGetMethod() {
+		$replace = new \Manticoresearch\Endpoints\Autocomplete();
+		$this->assertEquals('POST', $replace->getMethod());
+	}
+}