Add facets settings routes

src/Index.php

@@ -257,6 +257,25 @@ public function updateAcceptNewFields($accept_new_fields)
         return $this->httpPost('/indexes/'.$this->uid.'/settings/accept-new-fields', $accept_new_fields);
     }
 
+    // Settings - Attributes for faceting
+
+    public function getAttributesForFaceting()
+    {
+        return $this->httpGet('/indexes/'.$this->uid.'/settings/attributes-for-faceting');
+    }
+
+    public function updateAttributesForFaceting($attributes_for_faceting)
+    {
+        return $this->httpPost('/indexes/'.$this->uid.'/settings/attributes-for-faceting', $attributes_for_faceting);
+    }
+
+    public function resetAttributesForFaceting()
+    {
+        return $this->httpDelete('/indexes/'.$this->uid.'/settings/attributes-for-faceting');
+    }
+
+    // PRIVATE
+
     private function flattenOptions(array $options)
     {
         return array_map(function ($entry) {

tests/Settings/AttributesForFacetingTest.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace Tests\Settings;
+
+use Tests\TestCase;
+
+class AttributesForFacetingTest extends TestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->client->deleteAllIndexes();
+    }
+
+    public function testGetDefaultAttributesForFaceting()
+    {
+        $index = $this->client->createIndex('index');
+
+        $attributes = $index->getAttributesForFaceting();
+
+        $this->assertIsArray($attributes);
+        $this->assertEmpty($attributes);
+    }
+
+    public function testUpdateAttributesForFaceting()
+    {
+        $newAttributes = ['title'];
+        $index = $this->client->createIndex('index');
+
+        $promise = $index->updateAttributesForFaceting($newAttributes);
+
+        $this->assertIsValidPromise($promise);
+        $index->waitForPendingUpdate($promise['updateId']);
+
+        $attributesForFaceting = $index->getAttributesForFaceting();
+
+        $this->assertIsArray($attributesForFaceting);
+        $this->assertEquals($newAttributes, $attributesForFaceting);
+    }
+
+    public function testResetAttributesForFaceting()
+    {
+        $index = $this->client->createIndex('index');
+        $newAttributes = ['title'];
+
+        $promise = $index->updateAttributesForFaceting($newAttributes);
+        $index->waitForPendingUpdate($promise['updateId']);
+
+        $promise = $index->resetAttributesForFaceting();
+
+        $this->assertIsValidPromise($promise);
+
+        $index->waitForPendingUpdate($promise['updateId']);
+
+        $attributesForFaceting = $index->getAttributesForFaceting();
+        $this->assertIsArray($attributesForFaceting);
+        $this->assertEmpty($attributesForFaceting);
+    }
+}