Cancel/handle plugin message events to/from client (#133)

* Cancel/handle plugin message events to/from client

* spacing

pom.xml

@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>mineverse.Aust1n46.chat</groupId>
     <artifactId>VentureChat</artifactId>
-    <version>3.4.3</version>
+    <version>3.7.2</version>
     <url>https://bitbucket.org/Aust1n46/venturechat/src/master</url>
     <scm>
         <url>https://bitbucket.org/Aust1n46/venturechat/src/master</url>
@@ -204,21 +204,21 @@
         <dependency>
             <groupId>net.md-5</groupId>
             <artifactId>bungeecord-api</artifactId>
-            <version>1.13-SNAPSHOT</version>
+            <version>1.20-R0.1-SNAPSHOT</version>
             <type>jar</type>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>net.md-5</groupId>
             <artifactId>bungeecord-api</artifactId>
-            <version>1.13-SNAPSHOT</version>
+            <version>1.20-R0.1-SNAPSHOT</version>
             <type>javadoc</type>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>org.spigotmc</groupId>
             <artifactId>spigot-api</artifactId>
-            <version>1.19-R0.1-SNAPSHOT</version>
+            <version>1.20-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>

src/main/java/mineverse/Aust1n46/chat/ClickAction.java

@@ -0,0 +1,16 @@
+package mineverse.Aust1n46.chat;
+
+public enum ClickAction {
+	SUGGEST_COMMAND, RUN_COMMAND, OPEN_URL, NONE;
+
+	private final String jsonValue;
+
+	ClickAction() {
+		jsonValue = name().toLowerCase();
+	}
+
+	@Override
+	public String toString() {
+		return jsonValue;
+	}
+}

src/main/java/mineverse/Aust1n46/chat/MineverseChat.java

@@ -79,6 +79,17 @@ public class MineverseChat extends JavaPlugin implements PluginMessageListener {
 	private static Permission permission = null;
 	private static Chat chat = null;
 
+	// TODO: This won't be so poorly done in the 4.0.0 branch I promise...
+	public static boolean isConnectedToProxy() {
+		try {
+			final MineverseChat plugin = MineverseChat.getInstance();
+			return (plugin.getServer().spigot().getConfig().getBoolean("settings.bungeecord")
+					|| plugin.getServer().spigot().getPaperConfig().getBoolean("settings.velocity-support.enabled")
+					|| plugin.getServer().spigot().getPaperConfig().getBoolean("proxies.velocity.enabled"));
+		} catch (final NoSuchMethodError ignored) {} // Thrown if server isn't Paper.
+		return false;
+	}
+	
 	@Override
 	public void onEnable() {
 		ccInfo = new ChatChannelInfo();
@@ -126,9 +137,11 @@ public class MineverseChat extends JavaPlugin implements PluginMessageListener {
 		Bukkit.getConsoleSender().sendMessage(Format.FormatStringAll("&8[&eVentureChat&8]&e - Registering Listeners"));
 		Bukkit.getConsoleSender().sendMessage(Format.FormatStringAll("&8[&eVentureChat&8]&e - Attaching to Executors"));
 
-		Bukkit.getConsoleSender().sendMessage(Format.FormatStringAll("&8[&eVentureChat&8]&e - Establishing BungeeCord"));
-		Bukkit.getMessenger().registerOutgoingPluginChannel(this, PLUGIN_MESSAGING_CHANNEL);
-		Bukkit.getMessenger().registerIncomingPluginChannel(this, PLUGIN_MESSAGING_CHANNEL, this);
+		if (MineverseChat.isConnectedToProxy()) {
+			Bukkit.getConsoleSender().sendMessage(Format.FormatStringAll("&8[&eVentureChat&8]&e - Establishing BungeeCord"));
+			Bukkit.getMessenger().registerOutgoingPluginChannel(this, PLUGIN_MESSAGING_CHANNEL);
+			Bukkit.getMessenger().registerIncomingPluginChannel(this, PLUGIN_MESSAGING_CHANNEL, this);
+		}
 		
 		PluginManager pluginManager = getServer().getPluginManager();
 		if(pluginManager.isPluginEnabled("Towny")) {
@@ -203,7 +216,7 @@ public class MineverseChat extends JavaPlugin implements PluginMessageListener {
 						}
 					}
 				}
-				if (getConfig().getString("loglevel", "info").equals("debug")) {
+				if (getConfig().getString("loglevel", "info").equals("trace")) {
 					Bukkit.getConsoleSender()
 							.sendMessage(Format.FormatStringAll("&8[&eVentureChat&8]&e - Updating Player Mutes"));
 				}
@@ -363,6 +376,9 @@ public class MineverseChat extends JavaPlugin implements PluginMessageListener {
 
 	@Override
 	public void onPluginMessageReceived(String channel, Player player, byte[] inputStream) {
+		if (!MineverseChat.isConnectedToProxy()) {
+			return;
+		}
 		if(!channel.equals(PLUGIN_MESSAGING_CHANNEL)) {
 			return;
 		}
@@ -605,6 +621,15 @@ public class MineverseChat extends JavaPlugin implements PluginMessageListener {
 						sendPluginMessage(stream);
 						return;
 					}
+					if (p.getPlayer().hasPermission("venturechat.ignore.bypass")) {
+						out.writeUTF("Ignore");
+						out.writeUTF("Bypass");
+						out.writeUTF(server);
+						out.writeUTF(receiver);
+						out.writeUTF(sender.toString());
+						sendPluginMessage(stream);
+						return;
+					}
 					out.writeUTF("Ignore");
 					out.writeUTF("Echo");
 					out.writeUTF(server);
@@ -640,6 +665,12 @@ public class MineverseChat extends JavaPlugin implements PluginMessageListener {
 							.replace("{player}", receiverName));
 					synchronize(p, true);
 				}
+				if(identifier.equals("Bypass")) {
+					String receiver = msgin.readUTF();
+					UUID sender = UUID.fromString(msgin.readUTF());
+					MineverseChatPlayer p = MineverseChatAPI.getOnlineMineverseChatPlayer(sender);
+					p.getPlayer().sendMessage(LocalizedMessage.IGNORE_PLAYER_CANT.toString().replace("{player}", receiver));
+				}
 			}
 			if(subchannel.equals("Mute")) {
 				String identifier = msgin.readUTF();

src/main/java/mineverse/Aust1n46/chat/json/JsonAttribute.java

@@ -2,13 +2,15 @@ package mineverse.Aust1n46.chat.json;
 
 import java.util.List;
 
+import mineverse.Aust1n46.chat.ClickAction;
+
 public class JsonAttribute {
 	private String name;
 	private List<String> hoverText;
-	private String clickAction;
+	private ClickAction clickAction;
 	private String clickText;
 	
-	public JsonAttribute(String name, List<String> hoverText, String clickAction, String clickText) {
+	public JsonAttribute(String name, List<String> hoverText, ClickAction clickAction, String clickText) {
 		this.name = name;
 		this.hoverText = hoverText;
 		this.clickAction = clickAction;
@@ -23,7 +25,7 @@ public class JsonAttribute {
 		return hoverText;
 	}
 	
-	public String getClickAction() {
+	public ClickAction getClickAction() {
 		return clickAction;
 	}
 	

src/main/java/mineverse/Aust1n46/chat/json/JsonFormat.java

@@ -7,58 +7,66 @@ import java.util.List;
 
 import org.bukkit.configuration.ConfigurationSection;
 
+import mineverse.Aust1n46.chat.ClickAction;
 import mineverse.Aust1n46.chat.MineverseChat;
+import mineverse.Aust1n46.chat.utilities.Format;
 
 public class JsonFormat {
-    private static MineverseChat plugin = MineverseChat.getInstance();
-    private static HashMap<String, JsonFormat> jsonFormats;
+	private static MineverseChat plugin = MineverseChat.getInstance();
+	private static HashMap<String, JsonFormat> jsonFormats;
 
-    private List<JsonAttribute> jsonAttributes;
-    private int priority;
-    private String name;
+	private List<JsonAttribute> jsonAttributes;
+	private int priority;
+	private String name;
 
-    public JsonFormat(String name, int priority, List<JsonAttribute> jsonAttributes) {
-        this.name = name;
-        this.priority = priority;
-        this.jsonAttributes = jsonAttributes;
-    }
+	public JsonFormat(String name, int priority, List<JsonAttribute> jsonAttributes) {
+		this.name = name;
+		this.priority = priority;
+		this.jsonAttributes = jsonAttributes;
+	}
 
-    public static void initialize() {
-        jsonFormats = new HashMap<String, JsonFormat>();
-        ConfigurationSection jsonFormatSection = plugin.getConfig().getConfigurationSection("jsonformatting");
-        for (String jsonFormat : jsonFormatSection.getKeys(false)) {
-            int priority = jsonFormatSection.getInt(jsonFormat + ".priority", 0);
-            List<JsonAttribute> jsonAttributes = new ArrayList<>();
-            ConfigurationSection jsonAttributeSection = jsonFormatSection.getConfigurationSection(jsonFormat + ".json_attributes");
-            if (jsonAttributeSection != null) {
-	            for (String attribute : jsonAttributeSection.getKeys(false)) {
-	            	List<String> hoverText = jsonAttributeSection.getStringList(attribute + ".hover_text");
-	            	String clickAction = jsonAttributeSection.getString(attribute + ".click_action", "");
-	            	String clickText = jsonAttributeSection.getString(attribute + ".click_text", "");
-	            	jsonAttributes.add(new JsonAttribute(attribute, hoverText, clickAction, clickText));
-	            }
-            }
-            jsonFormats.put(jsonFormat.toLowerCase(), new JsonFormat(jsonFormat, priority, jsonAttributes));
-        }
-    }
+	public static void initialize() {
+		jsonFormats = new HashMap<String, JsonFormat>();
+		ConfigurationSection jsonFormatSection = plugin.getConfig().getConfigurationSection("jsonformatting");
+		for (String jsonFormat : jsonFormatSection.getKeys(false)) {
+			int priority = jsonFormatSection.getInt(jsonFormat + ".priority", 0);
+			List<JsonAttribute> jsonAttributes = new ArrayList<>();
+			ConfigurationSection jsonAttributeSection = jsonFormatSection.getConfigurationSection(jsonFormat + ".json_attributes");
+			if (jsonAttributeSection != null) {
+				for (String attribute : jsonAttributeSection.getKeys(false)) {
+					List<String> hoverText = jsonAttributeSection.getStringList(attribute + ".hover_text");
+					String clickActionText = jsonAttributeSection.getString(attribute + ".click_action", "none");
+					try {
+						ClickAction clickAction = ClickAction.valueOf(clickActionText.toUpperCase());
+						String clickText = jsonAttributeSection.getString(attribute + ".click_text", "");
+						jsonAttributes.add(new JsonAttribute(attribute, hoverText, clickAction, clickText));
+					} catch (IllegalArgumentException | NullPointerException exception) {
+						plugin.getServer().getConsoleSender()
+								.sendMessage(Format.FormatStringAll("&8[&eVentureChat&8]&c - Illegal click_action: " + clickActionText + " in jsonFormat: " + jsonFormat));
+					}
+				}
+			}
+			jsonFormats.put(jsonFormat.toLowerCase(), new JsonFormat(jsonFormat, priority, jsonAttributes));
+		}
+	}
 
-    public static Collection<JsonFormat> getJsonFormats() {
-        return jsonFormats.values();
-    }
+	public static Collection<JsonFormat> getJsonFormats() {
+		return jsonFormats.values();
+	}
 
-    public static JsonFormat getJsonFormat(String name) {
-        return jsonFormats.get(name.toLowerCase());
-    }
+	public static JsonFormat getJsonFormat(String name) {
+		return jsonFormats.get(name.toLowerCase());
+	}
 
-    public String getName() {
-        return name;
-    }
+	public String getName() {
+		return name;
+	}
 
-    public int getPriority() {
-        return priority;
-    }
+	public int getPriority() {
+		return priority;
+	}
 
-    public List<JsonAttribute> getJsonAttributes() {
-    	return jsonAttributes;
-    }
+	public List<JsonAttribute> getJsonAttributes() {
+		return jsonAttributes;
+	}
 }

src/main/java/mineverse/Aust1n46/chat/listeners/LoginListener.java

@@ -73,19 +73,14 @@ public class LoginListener implements Listener {
 			}
 		}
 
-		try {
-			if(plugin.getServer().spigot().getConfig().getBoolean("settings.bungeecord") || plugin.getServer().spigot().getPaperConfig().getBoolean("settings.velocity-support.enabled")) {
-				long delayInTicks = 20L;
-				final MineverseChatPlayer sync = mcp;
-				plugin.getServer().getScheduler().runTaskLaterAsynchronously(plugin, new Runnable() {
-					public void run() {
-						MineverseChat.synchronize(sync, false);
-					}
-				}, delayInTicks);
-			}
-		}
-		catch(NoSuchMethodError exception) { // Thrown if server isn't Paper.
-			// Do nothing
+		if (MineverseChat.isConnectedToProxy()) {
+			long delayInTicks = 20L;
+			final MineverseChatPlayer sync = mcp;
+			plugin.getServer().getScheduler().runTaskLaterAsynchronously(plugin, new Runnable() {
+				public void run() {
+					MineverseChat.synchronize(sync, false);
+				}
+			}, delayInTicks);
 		}
 	}
 }

src/main/java/mineverse/Aust1n46/chat/proxy/VentureChatBungee.java

@@ -105,6 +105,9 @@ public class VentureChatBungee extends Plugin implements Listener, VentureChatPr
 		if(!event.getTag().equals(VentureChatProxy.PLUGIN_MESSAGING_CHANNEL_STRING) && !event.getTag().contains("viaversion:")) {
 			return;
 		}
+		// Critical to prevent client from sending or receiving messages
+		event.setCancelled(true);
+
 		if(!(event.getSender() instanceof Server)) {
 			return;
 		}

src/main/java/mineverse/Aust1n46/chat/proxy/VentureChatProxy.java

@@ -205,6 +205,18 @@ public class VentureChatProxy {
 						source.sendPluginMessage(server, outstream.toByteArray());
 					}
 				}
+				if(identifier.equals("Bypass")) {
+					String server = in.readUTF();
+					String player = in.readUTF();
+					String sender = in.readUTF();
+					out.writeUTF("Ignore");
+					out.writeUTF("Bypass");
+					out.writeUTF(player);
+					out.writeUTF(sender);
+					if(!source.getServer(server).isEmpty()) {
+						source.sendPluginMessage(server, outstream.toByteArray());
+					}
+				}
 			}
 			if(subchannel.equals("Mute")) {
 				String identifier = in.readUTF();

src/main/java/mineverse/Aust1n46/chat/proxy/VentureChatVelocity.java

@@ -134,12 +134,14 @@ public class VentureChatVelocity implements VentureChatProxySource {
 		if(!channelIdentifierId.equals(VentureChatProxy.PLUGIN_MESSAGING_CHANNEL_STRING) && !channelIdentifierId.contains("viaversion:")) {
 			return;
 		}
+		// Critical to prevent client from sending or receiving messages
+		event.setResult(ForwardResult.handled());
+
 		if(!(event.getSource() instanceof ServerConnection)) {
 			return;
 		}
 		String serverName = ((ServerConnection) event.getSource()).getServerInfo().getName();
 		VentureChatProxy.onPluginMessage(event.getData(), serverName, this);
-		event.setResult(ForwardResult.handled());
 	}
 
 	@Override

src/main/java/mineverse/Aust1n46/chat/utilities/Format.java

@@ -10,6 +10,7 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
+import org.apache.commons.lang.StringUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.Sound;
@@ -22,6 +23,7 @@ import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.wrappers.WrappedChatComponent;
 
 import me.clip.placeholderapi.PlaceholderAPI;
+import mineverse.Aust1n46.chat.ClickAction;
 import mineverse.Aust1n46.chat.api.MineverseChatAPI;
 import mineverse.Aust1n46.chat.api.MineverseChatPlayer;
 import mineverse.Aust1n46.chat.json.JsonAttribute;
@@ -66,10 +68,9 @@ public class Format {
      */
 	public static String convertToJson(MineverseChatPlayer sender, String format, String chat) {
 		JsonFormat JSONformat = JsonFormat.getJsonFormat(sender.getJsonFormat());
-		String f = escapeJsonChars(format);
 		String c = escapeJsonChars(chat);
 		String json = "[\"\",{\"text\":\"\",\"extra\":[";
-		json += convertPlaceholders(f, JSONformat, sender);
+		json += convertPlaceholders(format, JSONformat, sender);
 		json += "]}";
 		json += "," + convertLinks(c);
 		json += "]";
@@ -109,31 +110,48 @@ public class Format {
 				indexStart = matcher.start();
 				indexEnd = matcher.end();
 				placeholder = remaining.substring(indexStart, indexEnd);
-				formattedPlaceholder = Format.FormatStringAll(PlaceholderAPI.setBracketPlaceholders(icp.getPlayer(), placeholder));
-				temp += convertToJsonColors(lastCode + remaining.substring(0, indexStart)) + ",";
+				formattedPlaceholder = escapeJsonChars(Format.FormatStringAll(PlaceholderAPI.setBracketPlaceholders(icp.getPlayer(), placeholder)));
+				temp += convertToJsonColors(escapeJsonChars(lastCode + remaining.substring(0, indexStart))) + ",";
 				lastCode = getLastCode(lastCode + remaining.substring(0, indexStart));
-				String action = "";
-				String text = "";
-				String hover = "";
+				boolean placeholderHasJsonAttribute = false;
 				for (JsonAttribute jsonAttribute : format.getJsonAttributes()) {
 					if (placeholder.contains(jsonAttribute.getName().replace("{", "").replace("}", ""))) {
-						action = jsonAttribute.getClickAction();
-						text = Format.FormatStringAll(
-								PlaceholderAPI.setBracketPlaceholders(icp.getPlayer(), jsonAttribute.getClickText()));
+						final StringBuilder hover = new StringBuilder();
 						for (String st : jsonAttribute.getHoverText()) {
-							hover += Format.FormatStringAll(st) + "\n";
+							hover.append(Format.FormatStringAll(st) + "\n");
 						}
+						final String hoverText;
+						if(!hover.isEmpty()) {
+							hoverText = escapeJsonChars(Format.FormatStringAll(
+									PlaceholderAPI.setBracketPlaceholders(icp.getPlayer(), hover.substring(0, hover.length() - 1))));
+						} else {
+							hoverText = StringUtils.EMPTY;
+						}
+						final ClickAction clickAction = jsonAttribute.getClickAction();
+						final String actionJson;
+						if (clickAction == ClickAction.NONE) {
+							actionJson = StringUtils.EMPTY;
+						} else {
+							final String clickText = escapeJsonChars(Format.FormatStringAll(
+									PlaceholderAPI.setBracketPlaceholders(icp.getPlayer(), jsonAttribute.getClickText())));
+							actionJson = ",\"clickEvent\":{\"action\":\"" + jsonAttribute.getClickAction().toString() + "\",\"value\":\"" + clickText
+							+ "\"}";
+						}
+						final String hoverJson;
+						if (hoverText.isEmpty()) {
+							hoverJson = StringUtils.EMPTY;
+						} else {
+							hoverJson = ",\"hoverEvent\":{\"action\":\"show_text\",\"value\":{\"text\":\"\",\"extra\":["
+									+ convertToJsonColors(hoverText) + "]}}";
+						}
+						temp += convertToJsonColors(lastCode + formattedPlaceholder, actionJson + hoverJson) + ",";
+						placeholderHasJsonAttribute = true;
+						break;
 					}
 				}
-				if(!hover.isEmpty()) {
-					hover = Format.FormatStringAll(
-							PlaceholderAPI.setBracketPlaceholders(icp.getPlayer(), hover.substring(0, hover.length() - 1)));
+				if (!placeholderHasJsonAttribute) {
+					temp += convertToJsonColors(lastCode + formattedPlaceholder) + ",";
 				}
-				temp += convertToJsonColors(lastCode + formattedPlaceholder,
-						",\"clickEvent\":{\"action\":\"" + action + "\",\"value\":\"" + text
-								+ "\"},\"hoverEvent\":{\"action\":\"show_text\",\"value\":{\"text\":\"\",\"extra\":["
-								+ convertToJsonColors(hover) + "]}}")
-						+ ",";
 				lastCode = getLastCode(lastCode + formattedPlaceholder);
 				remaining = remaining.substring(indexEnd);
 			} else {
@@ -172,8 +190,8 @@ public class Format {
 				if (ChatColor.stripColor(link).contains("https://"))
 					https = "s";
 				temp += convertToJsonColors(lastCode + link,
-						",\"underlined\":\"" + underlineURLs()
-								+ "\",\"clickEvent\":{\"action\":\"open_url\",\"value\":\"http" + https + "://"
+						",\"underlined\":" + underlineURLs()
+								+ ",\"clickEvent\":{\"action\":\"open_url\",\"value\":\"http" + https + "://"
 								+ ChatColor.stripColor(link.replace("http://", "").replace("https://", ""))
 								+ "\"},\"hoverEvent\":{\"action\":\"show_text\",\"value\":{\"text\":\"\",\"extra\":["
 								+ convertToJsonColors(lastCode + link) + "]}}")
@@ -325,15 +343,35 @@ public class Format {
 				underlined = false;
 			}
 			if (bold)
-				modifier += ",\"bold\":\"true\"";
+				if (VersionHandler.isAtLeast_1_20_4()) {
+					modifier += ",\"bold\":true";
+				} else {
+					modifier += ",\"bold\":\"true\"";
+				}
 			if (obfuscated)
-				modifier += ",\"obfuscated\":\"true\"";
+				if (VersionHandler.isAtLeast_1_20_4()) {
+					modifier += ",\"obfuscated\":true";
+				} else {
+					modifier += ",\"obfuscated\":\"true\"";
+				}
 			if (italic)
-				modifier += ",\"italic\":\"true\"";
+				if (VersionHandler.isAtLeast_1_20_4()) {
+					modifier += ",\"italic\":true";
+				} else {
+					modifier += ",\"italic\":\"true\"";
+				}
 			if (underlined)
-				modifier += ",\"underlined\":\"true\"";
+				if (VersionHandler.isAtLeast_1_20_4()) {
+					modifier += ",\"underlined\":true";
+				} else {
+					modifier += ",\"underlined\":\"true\"";
+				}
 			if (strikethrough)
-				modifier += ",\"strikethrough\":\"true\"";
+				if (VersionHandler.isAtLeast_1_20_4()) {
+					modifier += ",\"strikethrough\":true";
+				} else {
+					modifier += ",\"strikethrough\":\"true\"";
+				}
 			remaining = remaining.substring(colorLength);
 			colorLength = LEGACY_COLOR_CODE_LENGTH;
 			indexNextColor = remaining.indexOf(BUKKIT_COLOR_CODE_PREFIX);
@@ -430,16 +468,20 @@ public class Format {
 
 	public static PacketContainer createPacketPlayOutChat(String json) {
 		final PacketContainer container;
-		if (VersionHandler.isAbove_1_19()) {
+		if (VersionHandler.isAtLeast_1_20_4()) { // 1.20.4+
+			container = new PacketContainer(PacketType.Play.Server.SYSTEM_CHAT);
+			container.getChatComponents().write(0, WrappedChatComponent.fromJson(json));
+			container.getBooleans().write(0, false);
+		} else if (VersionHandler.isAbove_1_19()) { // 1.19.1 -> 1.20.3
 			container = new PacketContainer(PacketType.Play.Server.SYSTEM_CHAT);
 			container.getStrings().write(0, json);
 			container.getBooleans().write(0, false);
-		} else if (VersionHandler.isUnder_1_19()) {
+		} else if (VersionHandler.isUnder_1_19()) { // 1.7 -> 1.19
 			WrappedChatComponent component = WrappedChatComponent.fromJson(json);
 			container = new PacketContainer(PacketType.Play.Server.CHAT);
 			container.getModifier().writeDefaults();
 			container.getChatComponents().write(0, component);
-		} else {
+		} else { // 1.19
 			container = new PacketContainer(PacketType.Play.Server.SYSTEM_CHAT);
 			container.getStrings().write(0, json);
 			container.getIntegers().write(0, 1);
@@ -449,15 +491,19 @@ public class Format {
 
 	public static PacketContainer createPacketPlayOutChat(WrappedChatComponent component) {
 		final PacketContainer container;
-		if (VersionHandler.isAbove_1_19()) {
+		if (VersionHandler.isAtLeast_1_20_4()) { // 1.20.4+
+			container = new PacketContainer(PacketType.Play.Server.SYSTEM_CHAT);
+			container.getChatComponents().write(0, component);
+			container.getBooleans().write(0, false);
+		} else if (VersionHandler.isAbove_1_19()) { // 1.19.1 -> 1.20.3
 			container = new PacketContainer(PacketType.Play.Server.SYSTEM_CHAT);
 			container.getStrings().write(0, component.getJson());
 			container.getBooleans().write(0, false);
-		} else if (VersionHandler.isUnder_1_19()) {
+		} else if (VersionHandler.isUnder_1_19()) { // 1.7 -> 1.19
 			container = new PacketContainer(PacketType.Play.Server.CHAT);
 			container.getModifier().writeDefaults();
 			container.getChatComponents().write(0, component);
-		} else {
+		} else { // 1.19
 			container = new PacketContainer(PacketType.Play.Server.SYSTEM_CHAT);
 			container.getStrings().write(0, component.getJson());
 			container.getIntegers().write(0, 1);
@@ -765,8 +811,13 @@ public class Format {
 				.replace(")", "\\)").replace("|", "\\|").replace("+", "\\+").replace("*", "\\*");
 	}
 
-	public static boolean underlineURLs() {
-		return getInstance().getConfig().getBoolean("underlineurls", true);
+	public static String underlineURLs() {
+		final boolean configValue = getInstance().getConfig().getBoolean("underlineurls", true);
+		if (VersionHandler.isAtLeast_1_20_4()) {
+			return String.valueOf(configValue);
+		} else {
+			return "\"" + configValue + "\"";
+		}
 	}
 	
 	public static String parseTimeStringFromMillis(long millis) {

src/main/java/mineverse/Aust1n46/chat/versions/VersionHandler.java

@@ -7,6 +7,7 @@ public final class VersionHandler {
 	public static final MinecraftVersion SERVER_VERSION = MinecraftVersion.getCurrentVersion();
 	private static final MinecraftVersion MC1_19 = new MinecraftVersion(1, 19, 0);
 	private static final MinecraftVersion MC1_19_1 = new MinecraftVersion(1, 19, 1);
+	private static final MinecraftVersion MC1_20_4 = new MinecraftVersion(1, 20, 4);
 
 	private VersionHandler() {
 	}
@@ -74,4 +75,8 @@ public final class VersionHandler {
 	public static boolean isAbove_1_19() {
 		return SERVER_VERSION.isAtLeast(MC1_19_1);
 	}
+	
+	public static boolean isAtLeast_1_20_4() {
+		return SERVER_VERSION.isAtLeast(MC1_20_4);
+	}
 }

src/main/resources/config.yml

@@ -136,7 +136,7 @@ messageremovertext: '&c&o<message removed>'
 # The name of the group is the permissions node for the format
 # Example: venturechat.json.Owner is the node for the group Owner
 # A lower priority overrides a higher priority if a player has more than 1 group
-# Possible options for click_name and click_prefix are suggest_command, run_command, and open_url
+# Possible options for click_action are suggest_command, run_command, open_url, and none
 jsonformatting:
   Default: # This default format is required!  Do not delete or rename it!
     priority: 2147483647 # Integer.MAX_VALUE