Fix issue with class being null

CHANGELOG.md

@@ -12,6 +12,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Removed
 - Packages
 
+## [0.1.1] - 2021-03-21
+### Fixed
+- Fixed issue with group 0 (all lights). Class can be null
+
 ## 0.1.0 - 2021-03-20
 ### Added
 - `All` Initial release
@@ -25,3 +29,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
     - Alert (none / select / lselect)
     - Color (XY, Hex, RGB)
 - `Cloud` Full OAuth2 authentication flow (including Digest Auth)
+
+[0.1.1]: https://github.com/jkniest/hue-it/compare/0.1.0...0.1.1

src/Group.php

@@ -24,7 +24,7 @@ class Group implements IsControllable
 
     private bool $anyOn;
 
-    private string $class;
+    private ?string $class;
 
     private int $brightness;
 
@@ -89,7 +89,7 @@ public function isAnyOn(): bool
         return $this->anyOn;
     }
 
-    public function getClass(): string
+    public function getClass(): ?string
     {
         return $this->class;
     }
@@ -291,7 +291,7 @@ private function mapData(array $rawData): void
         $this->type = $rawData['type'];
         $this->allOn = $rawData['state']['all_on'];
         $this->anyOn = $rawData['state']['any_on'];
-        $this->class = $rawData['class'];
+        $this->class = $rawData['class'] ?? null;
 
         $this->brightness = $rawData['action']['bri'];
         $this->colorTemperature = $rawData['action']['ct'];