Add warning message when VanillaTweaks Twinkling Stars is installed

src/main/java/net/wurstclient/WurstClient.java

@@ -47,6 +47,7 @@ import net.wurstclient.nochatreports.NoChatReportsChannelHandler;
 import net.wurstclient.other_feature.OtfList;
 import net.wurstclient.other_feature.OtherFeature;
 import net.wurstclient.settings.SettingsFile;
+import net.wurstclient.update.ProblematicResourcePackDetector;
 import net.wurstclient.update.WurstUpdater;
 import net.wurstclient.util.json.JsonException;
 
@@ -79,6 +80,7 @@ public enum WurstClient
 	private boolean enabled = true;
 	private static boolean guiInitialized;
 	private WurstUpdater updater;
+	private ProblematicResourcePackDetector problematicPackDetector;
 	private Path wurstFolder;
 	
 	private KeyBinding zoomKey;
@@ -139,6 +141,9 @@ public enum WurstClient
 		updater = new WurstUpdater();
 		eventManager.add(UpdateListener.class, updater);
 		
+		problematicPackDetector = new ProblematicResourcePackDetector();
+		problematicPackDetector.start();
+		
 		Path altsFile = wurstFolder.resolve("alts.encrypted_json");
 		Path encFolder =
 			Paths.get(System.getProperty("user.home"), ".Wurst encryption")
@@ -316,6 +321,11 @@ public enum WurstClient
 		return updater;
 	}
 	
+	public ProblematicResourcePackDetector getProblematicPackDetector()
+	{
+		return problematicPackDetector;
+	}
+	
 	public Path getWurstFolder()
 	{
 		return wurstFolder;

src/main/java/net/wurstclient/mixin/PackScreenMixin.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2014-2022 Wurst-Imperium and contributors.
+ *
+ * This source code is subject to the terms of the GNU General Public
+ * License, version 3. If a copy of the GPL was not distributed with this
+ * file, You can obtain one at: https://www.gnu.org/licenses/gpl-3.0.txt
+ */
+package net.wurstclient.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.gui.screen.pack.PackScreen;
+import net.minecraft.text.Text;
+import net.wurstclient.WurstClient;
+
+@Mixin(PackScreen.class)
+public class PackScreenMixin extends Screen
+{
+	private PackScreenMixin(WurstClient wurst, Text title)
+	{
+		super(title);
+	}
+	
+	/**
+	 * Scans for problematic resource packs (currently just VanillaTweaks
+	 * Twinkling Stars) whenever the resource pack screen is closed.
+	 */
+	@Inject(at = @At("HEAD"), method = "close()V")
+	public void onClose(CallbackInfo ci)
+	{
+		WurstClient.INSTANCE.getProblematicPackDetector().start();
+	}
+}

src/main/java/net/wurstclient/update/ProblematicResourcePackDetector.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2014-2022 Wurst-Imperium and contributors.
+ *
+ * This source code is subject to the terms of the GNU General Public
+ * License, version 3. If a copy of the GPL was not distributed with this
+ * file, You can obtain one at: https://www.gnu.org/licenses/gpl-3.0.txt
+ */
+package net.wurstclient.update;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import net.minecraft.resource.ResourcePack;
+import net.minecraft.resource.ResourcePackProfile;
+import net.wurstclient.WurstClient;
+import net.wurstclient.events.UpdateListener;
+import net.wurstclient.util.ChatUtils;
+import net.wurstclient.util.StreamUtils;
+
+public final class ProblematicResourcePackDetector implements UpdateListener
+{
+	private static final String WARNING_MESSAGE =
+		"VanillaTweaks \"Twinkling Stars\" pack detected. This resource pack is known to cause problems with Wurst!";
+	
+	private boolean running;
+	
+	public void start()
+	{
+		if(running)
+			return;
+		
+		WurstClient.INSTANCE.getEventManager().add(UpdateListener.class, this);
+		running = true;
+	}
+	
+	@Override
+	public void onUpdate()
+	{
+		if(WurstClient.INSTANCE.isEnabled() && isTwinklingStarsInstalled())
+			ChatUtils.warning(WARNING_MESSAGE);
+		
+		WurstClient.INSTANCE.getEventManager().remove(UpdateListener.class,
+			this);
+		running = false;
+	}
+	
+	private boolean isTwinklingStarsInstalled()
+	{
+		Collection<ResourcePackProfile> enabledProfiles =
+			WurstClient.MC.getResourcePackManager().getEnabledProfiles();
+		
+		for(ResourcePackProfile profile : enabledProfiles)
+		{
+			if(!isVanillaTweaks(profile))
+				continue;
+			
+			ResourcePack pack = profile.createResourcePack();
+			if(!containsTwinklingStars(pack))
+				continue;
+			
+			return true;
+		}
+		
+		return false;
+	}
+	
+	private boolean isVanillaTweaks(ResourcePackProfile profile)
+	{
+		return profile.getDescription().getString().contains("Vanilla Tweaks");
+	}
+	
+	private boolean containsTwinklingStars(ResourcePack pack)
+	{
+		try
+		{
+			ArrayList<String> lines =
+				StreamUtils.readAllLines(pack.openRoot("Selected Packs.txt"));
+			
+			return lines.stream()
+				.anyMatch(line -> line.contains("TwinklingStars"));
+			
+		}catch(IOException e)
+		{
+			return false;
+		}
+	}
+}

src/main/java/net/wurstclient/util/StreamUtils.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014-2022 Wurst-Imperium and contributors.
+ *
+ * This source code is subject to the terms of the GNU General Public
+ * License, version 3. If a copy of the GPL was not distributed with this
+ * file, You can obtain one at: https://www.gnu.org/licenses/gpl-3.0.txt
+ */
+package net.wurstclient.util;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+
+public enum StreamUtils
+{
+	;
+	
+	public static ArrayList<String> readAllLines(InputStream input)
+		throws IOException
+	{
+		try(BufferedReader br =
+			new BufferedReader(new InputStreamReader(input)))
+		{
+			ArrayList<String> lines = new ArrayList<>();
+			String line;
+			
+			while((line = br.readLine()) != null)
+				lines.add(line);
+			
+			return lines;
+		}
+	}
+}

src/main/resources/wurst.mixins.json

@@ -46,6 +46,7 @@
     "MiningToolItemMixin",
     "MouseMixin",
     "MultiplayerScreenMixin",
+    "PackScreenMixin",
     "PlayerInventoryMixin",
     "PlayerSkinProviderMixin",
     "PowderSnowBlockMixin",