Add speaker playback state

dirigera-client-api/src/main/java/de/dvdgeisler/iot/dirigera/client/api/model/device/speaker/SpeakerPlaybackState.java

@@ -0,0 +1,18 @@
+package de.dvdgeisler.iot.dirigera.client.api.model.device.speaker;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public enum SpeakerPlaybackState {
+    @JsonProperty("playbackIdle")
+    IDLE,
+    @JsonProperty("playbackPlaying")
+    PLAYING,
+    @JsonProperty("playbackPaused")
+    PAUSED,
+    @JsonProperty("playbackNext")
+    NEXT,
+    @JsonProperty("playbackPrevious")
+    PREVIOUS,
+    @JsonProperty("playbackBuffering")
+    BUFFERING
+}

dirigera-client-api/src/main/java/de/dvdgeisler/iot/dirigera/client/api/model/device/speaker/SpeakerStateAttributes.java

@@ -6,7 +6,7 @@
 
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class SpeakerStateAttributes extends DeviceStateAttributes {
-  public String playback;
+  public SpeakerPlaybackState playback;
   public LocalDateTime playbackLastChangedTimestamp;
   public SpeakerAudioAttributes playbackAudio;
   public SpeakerPlaybackPosition playbackPosition;