Implemented Change Skin endpoint

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [API Status](https://wiki.vg/Mojang_API#API_Status) endpoint.
 - [UUID to Name history](https://wiki.vg/Mojang_API#UUID_-.3E_Name_history) endpoint.
 - [Playernames -> UUIDs](https://wiki.vg/Mojang_API#Playernames_-.3E_UUIDs) endpoint.
+- [Change Skin](https://wiki.vg/Mojang_API#Change_Skin) endpoint.
 
 ### Changed
 - The constructor no longer has arguments.

src/Api.php

@@ -177,6 +177,29 @@ class Api {
         return $result;
     }
 
+    /**
+     * @param string $accessToken
+     * @param string $accountUuid
+     * @param string $skinUrl
+     * @param bool $isSlim
+     *
+     * @throws \Ely\Mojang\Exception\MojangApiException
+     * @throws GuzzleException
+     *
+     * @url https://wiki.vg/Mojang_API#Change_Skin
+     */
+    public function changeSkin(string $accessToken, string $accountUuid, string $skinUrl, bool $isSlim): void {
+        $this->getClient()->request('POST', "https://api.mojang.com/user/profile/{$accountUuid}/skin", [
+            'form_params' => [
+                'model' => $isSlim ? 'slim' : '',
+                'url' => $skinUrl,
+            ],
+            'headers' => [
+                'Authorization' => 'Bearer ' . $accessToken,
+            ],
+        ]);
+    }
+
     /**
      * @param string $accessToken
      * @param string $accountUuid

tests/ApiTest.php

@@ -251,11 +251,32 @@ class ApiTest extends TestCase {
         $this->assertStringStartsWith('https://sessionserver.mojang.com/session/minecraft/profile/86f6e3695b764412a29820cac1d4d0d6', (string)$request2->getUri());
     }
 
+    public function testChangeSkinNotSlim() {
+        $this->mockHandler->append(new Response(200));
+        $this->api->changeSkin('mocked access token', '86f6e3695b764412a29820cac1d4d0d6', 'http://localhost/skin.png', false);
+        /** @var \Psr\Http\Message\RequestInterface $request */
+        $request = $this->history[0]['request'];
+        $this->assertSame('https://api.mojang.com/user/profile/86f6e3695b764412a29820cac1d4d0d6/skin', (string)$request->getUri());
+        $this->assertSame('Bearer mocked access token', $request->getHeaderLine('Authorization'));
+        $body = urldecode($request->getBody()->getContents());
+        $this->assertStringContainsString('url=http://localhost/skin.png', $body);
+        $this->assertStringNotContainsString('model=slim', $body);
+    }
+
+    public function testChangeSkinSlim() {
+        $this->mockHandler->append(new Response(200));
+        $this->api->changeSkin('mocked access token', '86f6e3695b764412a29820cac1d4d0d6', 'http://localhost/skin.png', true);
+        /** @var \Psr\Http\Message\RequestInterface $request */
+        $request = $this->history[0]['request'];
+        $this->assertStringContainsString('model=slim', $request->getBody()->getContents());
+    }
+
     public function testUploadSkinNotSlim() {
         $this->mockHandler->append(new Response(200));
         $this->api->uploadSkin('mocked access token', '86f6e3695b764412a29820cac1d4d0d6', 'skin contents', false);
         /** @var \Psr\Http\Message\RequestInterface $request */
         $request = $this->history[0]['request'];
+        $this->assertSame('https://api.mojang.com/user/profile/86f6e3695b764412a29820cac1d4d0d6/skin', (string)$request->getUri());
         $this->assertSame('Bearer mocked access token', $request->getHeaderLine('Authorization'));
         $this->assertStringNotContainsString('slim', $request->getBody()->getContents());
     }
@@ -265,6 +286,7 @@ class ApiTest extends TestCase {
         $this->api->uploadSkin('mocked access token', '86f6e3695b764412a29820cac1d4d0d6', 'skin contents', true);
         /** @var \Psr\Http\Message\RequestInterface $request */
         $request = $this->history[0]['request'];
+        $this->assertSame('https://api.mojang.com/user/profile/86f6e3695b764412a29820cac1d4d0d6/skin', (string)$request->getUri());
         $this->assertStringContainsString('slim', $request->getBody()->getContents());
     }