Improve media packets

src/main/java/com/imgfloat/app/model/AssetEvent.java

@@ -14,6 +14,7 @@ public class AssetEvent {
     private AssetView payload;
     private String assetId;
     private Boolean play;
+    private AssetPatch patch;
 
     public static AssetEvent created(String channel, AssetView asset) {
         AssetEvent event = new AssetEvent();
@@ -24,6 +25,15 @@ public class AssetEvent {
         return event;
     }
 
+    public static AssetEvent updated(String channel, AssetPatch patch) {
+        AssetEvent event = new AssetEvent();
+        event.type = Type.UPDATED;
+        event.channel = channel;
+        event.assetId = patch.id();
+        event.patch = patch;
+        return event;
+    }
+
     public static AssetEvent play(String channel, AssetView asset, boolean play) {
         AssetEvent event = new AssetEvent();
         event.type = Type.PLAY;
@@ -34,21 +44,12 @@ public class AssetEvent {
         return event;
     }
 
-    public static AssetEvent updated(String channel, AssetView asset) {
-        AssetEvent event = new AssetEvent();
-        event.type = Type.UPDATED;
-        event.channel = channel;
-        event.payload = asset;
-        event.assetId = asset.id();
-        return event;
-    }
-
-    public static AssetEvent visibility(String channel, AssetView asset) {
+    public static AssetEvent visibility(String channel, AssetPatch patch) {
         AssetEvent event = new AssetEvent();
         event.type = Type.VISIBILITY;
         event.channel = channel;
-        event.payload = asset;
-        event.assetId = asset.id();
+        event.patch = patch;
+        event.assetId = patch.id();
         return event;
     }
 
@@ -79,4 +80,8 @@ public class AssetEvent {
     public Boolean getPlay() {
         return play;
     }
+
+    public AssetPatch getPatch() {
+        return patch;
+    }
 }

src/main/java/com/imgfloat/app/model/AssetPatch.java

@@ -0,0 +1,63 @@
+package com.imgfloat.app.model;
+
+/**
+ * Represents a partial update for an {@link Asset}. Only the fields that changed
+ * for a given operation are populated to reduce payload sizes sent over WebSocket.
+ */
+public record AssetPatch(
+        String id,
+        Double x,
+        Double y,
+        Double width,
+        Double height,
+        Double rotation,
+        Double speed,
+        Boolean muted,
+        Integer zIndex,
+        Boolean hidden,
+        Boolean audioLoop,
+        Integer audioDelayMillis,
+        Double audioSpeed,
+        Double audioPitch,
+        Double audioVolume
+) {
+    public static AssetPatch fromTransform(Asset asset) {
+        return new AssetPatch(
+                asset.getId(),
+                asset.getX(),
+                asset.getY(),
+                asset.getWidth(),
+                asset.getHeight(),
+                asset.getRotation(),
+                asset.getSpeed(),
+                asset.isMuted(),
+                asset.getZIndex(),
+                null,
+                asset.isAudioLoop(),
+                asset.getAudioDelayMillis(),
+                asset.getAudioSpeed(),
+                asset.getAudioPitch(),
+                asset.getAudioVolume()
+        );
+    }
+
+    public static AssetPatch fromVisibility(Asset asset) {
+        return new AssetPatch(
+                asset.getId(),
+                null,
+                null,
+                null,
+                null,
+                null,
+                null,
+                null,
+                null,
+                asset.isHidden(),
+                null,
+                null,
+                null,
+                null,
+                null
+        );
+    }
+}

src/main/java/com/imgfloat/app/service/ChannelDirectoryService.java

@@ -2,6 +2,7 @@ package com.imgfloat.app.service;
 
 import com.imgfloat.app.model.Asset;
 import com.imgfloat.app.model.AssetEvent;
+import com.imgfloat.app.model.AssetPatch;
 import com.imgfloat.app.model.Channel;
 import com.imgfloat.app.model.AssetView;
 import com.imgfloat.app.model.CanvasSettingsRequest;
@@ -191,7 +192,8 @@ public class ChannelDirectoryService {
                     }
                     assetRepository.save(asset);
                     AssetView view = AssetView.from(normalized, asset);
-                    messagingTemplate.convertAndSend(topicFor(broadcaster), AssetEvent.updated(broadcaster, view));
+                    AssetPatch patch = AssetPatch.fromTransform(asset);
+                    messagingTemplate.convertAndSend(topicFor(broadcaster), AssetEvent.updated(broadcaster, patch));
                     return view;
                 });
     }
@@ -216,7 +218,8 @@ public class ChannelDirectoryService {
                     asset.setHidden(request.isHidden());
                     assetRepository.save(asset);
                     AssetView view = AssetView.from(normalized, asset);
-                    messagingTemplate.convertAndSend(topicFor(broadcaster), AssetEvent.visibility(broadcaster, view));
+                    AssetPatch patch = AssetPatch.fromVisibility(asset);
+                    messagingTemplate.convertAndSend(topicFor(broadcaster), AssetEvent.visibility(broadcaster, patch));
                     return view;
                 });
     }