Resource Pack Status Event

gradle.properties

@@ -15,6 +15,6 @@ kotlin_version=1.9.22
 fabric_kotlin_version=1.10.17+kotlin.1.9.22
 
 # Mod Properties
-mod_version=1.0.0
+mod_version=1.1.0
 maven_group=net.mcbrawls
 mod_id=packmanager

src/main/java/net/mcbrawls/packmanager/ResourcePackStatusEvent.java

@@ -0,0 +1,30 @@
+package net.mcbrawls.packmanager;
+
+import net.fabricmc.fabric.api.event.Event;
+import net.fabricmc.fabric.api.event.EventFactory;
+import net.minecraft.network.packet.c2s.common.ResourcePackStatusC2SPacket;
+import net.minecraft.server.network.ServerPlayerEntity;
+
+import java.util.UUID;
+
+/**
+ * An event invoked when the server receives a resource pack status packet.
+ * This is only invoked during the play phase, not configuration.
+ */
+public interface ResourcePackStatusEvent {
+    Event<ResourcePackStatusEvent> EVENT = EventFactory.createArrayBacked(
+            ResourcePackStatusEvent.class,
+            callbacks -> (player, id, status) -> {
+                for (ResourcePackStatusEvent callback : callbacks) {
+                    callback.onStatus(player, id, status);
+                }
+            }
+    );
+
+    /**
+     * Called on resource pack status receipt from the client.
+     * @param id the id of the resource pack
+     * @param status the status of the client
+     */
+    void onStatus(ServerPlayerEntity player, UUID id, ResourcePackStatusC2SPacket.Status status);
+}

src/main/java/net/mcbrawls/packmanager/mixin/ServerPlayNetworkHandlerMixin.java

@@ -0,0 +1,31 @@
+package net.mcbrawls.packmanager.mixin;
+
+import net.mcbrawls.packmanager.ResourcePackStatusEvent;
+import net.minecraft.network.ClientConnection;
+import net.minecraft.network.packet.c2s.common.ResourcePackStatusC2SPacket;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.network.ConnectedClientData;
+import net.minecraft.server.network.ServerCommonNetworkHandler;
+import net.minecraft.server.network.ServerPlayNetworkHandler;
+import net.minecraft.server.network.ServerPlayerEntity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(ServerPlayNetworkHandler.class)
+public abstract class ServerPlayNetworkHandlerMixin extends ServerCommonNetworkHandler {
+    @Shadow public ServerPlayerEntity player;
+
+    private ServerPlayNetworkHandlerMixin(MinecraftServer server, ClientConnection connection, ConnectedClientData clientData) {
+        super(server, connection, clientData);
+    }
+
+    @Override
+    public void onResourcePackStatus(ResourcePackStatusC2SPacket packet) {
+        super.onResourcePackStatus(packet);
+
+        // invoke event if not disconnected
+        if (!connection.disconnected) {
+            ResourcePackStatusEvent.EVENT.invoker().onStatus(this.player, packet.id(), packet.status());
+        }
+    }
+}

src/main/resources/packmanager.accesswidener

@@ -1 +1,3 @@
 accessWidener v2 named
+
+accessible field net/minecraft/network/ClientConnection disconnected Z

src/main/resources/packmanager.mixins.json

@@ -4,6 +4,7 @@
     "compatibilityLevel": "JAVA_17",
     "mixins": [
         "MinecraftServerMixin",
+        "ServerPlayNetworkHandlerMixin",
         "ServerWorldMixin"
     ],
     "injectors": {

src/test/kotlin/net/mcbrawls/packmanager/test/PackManagerTest.kt

@@ -3,6 +3,7 @@ package net.mcbrawls.packmanager.test
 import net.fabricmc.api.DedicatedServerModInitializer
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents
 import net.mcbrawls.packmanager.ResourcePackEnvironment
+import net.mcbrawls.packmanager.ResourcePackStatusEvent
 import net.minecraft.server.MinecraftServer.ServerResourcePackProperties
 import net.minecraft.world.World
 import java.util.UUID
@@ -59,5 +60,9 @@ object PackManagerTest : DedicatedServerModInitializer {
                 )
             }
         }
+
+        ResourcePackStatusEvent.EVENT.register { player, id, status ->
+            println("${player.gameProfile.name}: $id, $status")
+        }
     }
 }