Implemented API State endpoint

src/Api.php

@@ -24,6 +24,26 @@ class Api {
         $this->client = $client;
     }
 
+    /**
+     * @return \Ely\Mojang\Response\ApiStatus[]
+     *
+     * @throws GuzzleException
+     *
+     * @url https://wiki.vg/Mojang_API#API_Status
+     */
+    public function apiStatus(): array {
+        $response = $this->getClient()->request('GET', 'https://status.mojang.com/check');
+        $body = $this->decode($response->getBody()->getContents());
+
+        $result = [];
+        foreach ($body as $serviceDeclaration) {
+            $serviceName = array_keys($serviceDeclaration)[0];
+            $result[$serviceName] = new Response\ApiStatus($serviceName, $serviceDeclaration[$serviceName]);
+        }
+
+        return $result;
+    }
+
     /**
      * @param string $username
      * @param int    $atTime

src/Response/ApiStatus.php

@@ -0,0 +1,62 @@
+<?php
+declare(strict_types=1);
+
+namespace Ely\Mojang\Response;
+
+class ApiStatus {
+
+    /**
+     * @var string
+     */
+    private $serviceName;
+
+    /**
+     * @var string
+     */
+    private $status;
+
+    public function __construct(string $serviceName, string $status) {
+        $this->serviceName = $serviceName;
+        $this->status = $status;
+    }
+
+    public function getServiceName(): string {
+        return $this->serviceName;
+    }
+
+    public function getStatus(): string {
+        return $this->status;
+    }
+
+    /**
+     * Asserts that current service has no issues.
+     *
+     * @return bool
+     */
+    public function isGreen(): bool {
+        return $this->assertStatusIs('green');
+    }
+
+    /**
+     * Asserts that current service has some issues.
+     *
+     * @return bool
+     */
+    public function isYellow(): bool {
+        return $this->assertStatusIs('yellow');
+    }
+
+    /**
+     * Asserts that current service is unavailable.
+     *
+     * @return bool
+     */
+    public function isRed(): bool {
+        return $this->assertStatusIs('red');
+    }
+
+    private function assertStatusIs(string $expectedStatus): bool {
+        return $this->getStatus() === $expectedStatus;
+    }
+
+}