VersionInformer

src/main/java/de/gerrygames/viarewind/legacysupport/BukkitPlugin.java

@@ -3,18 +3,28 @@ package de.gerrygames.viarewind.legacysupport;
 import de.gerrygames.viarewind.legacysupport.injector.LilyPadFixer;
 import de.gerrygames.viarewind.legacysupport.listener.BrewingListener;
 import de.gerrygames.viarewind.legacysupport.listener.EnchantingListener;
+import de.gerrygames.viarewind.legacysupport.versioninfo.VersionInformer;
 import org.bukkit.Bukkit;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.plugin.java.JavaPlugin;
 
 public class BukkitPlugin extends JavaPlugin {
+	private static BukkitPlugin instance;
 
 	@Override
 	public void onEnable() {
+		instance = this;
 		saveDefaultConfig();
+		getConfig().options().copyDefaults(true);
+		saveConfig();
 		FileConfiguration config = getConfig();
 		if (config.getBoolean("enchanting-gui-fix")) Bukkit.getPluginManager().registerEvents(new EnchantingListener(), this);
 		if (config.getBoolean("brewing-stand-gui-fix")) Bukkit.getPluginManager().registerEvents(new BrewingListener(), this);
 		if (config.getBoolean("lily-pad-fix")) LilyPadFixer.fix();
+		if (config.getBoolean("versioninfo.active")) new VersionInformer();
+	}
+
+	public static BukkitPlugin getInstance() {
+		return instance;
 	}
 }

src/main/java/de/gerrygames/viarewind/legacysupport/versioninfo/VersionInformer.java

@@ -0,0 +1,42 @@
+package de.gerrygames.viarewind.legacysupport.versioninfo;
+
+import de.gerrygames.viarewind.legacysupport.BukkitPlugin;
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import us.myles.ViaVersion.api.Via;
+
+public class VersionInformer implements Listener {
+	private String message;
+	private int maxVersion;
+
+	public VersionInformer() {
+		message = BukkitPlugin.getInstance().getConfig().getString("versioninfo.message");
+		message = ChatColor.translateAlternateColorCodes('&', message);
+		message = message.replace("%version%", Bukkit.getVersion().split(" ")[2].replace(")", ""));
+
+		maxVersion = BukkitPlugin.getInstance().getConfig().getInt("versioninfo.max-version");
+		String interval = BukkitPlugin.getInstance().getConfig().getString("versioninfo.interval");
+		if (interval.equalsIgnoreCase("JOIN")) {
+			Bukkit.getPluginManager().registerEvents(this, BukkitPlugin.getInstance());
+		} else {
+			long ticks = Long.parseLong(interval);
+			Bukkit.getScheduler().runTaskTimer(BukkitPlugin.getInstance(), () -> {
+				Bukkit.getOnlinePlayers().forEach(player -> {
+					int version = Via.getAPI().getPlayerVersion(player);
+					if (version>maxVersion) return;
+					player.sendMessage(message);
+				});
+			}, ticks, ticks);
+		}
+	}
+
+	@EventHandler
+	public void onJoin(PlayerJoinEvent e) {
+		int version = Via.getAPI().getPlayerVersion(e.getPlayer());
+		if (version>maxVersion) return;
+		e.getPlayer().sendMessage(message);
+	}
+}

src/main/resources/config.yml

@@ -1,4 +1,14 @@
+#Automatically put blaze powder in brewing stands for clients lower than 1.9
 brewing-stand-gui-fix: true
+#Automatically put lapis lazuli in enchanting tables for clients lower than 1.8
 enchanting-gui-fix: true
-vehicle-fix: true
+#fix the lily pad bounding box to prevent clients lower than 1.9 from glitching
-lily-pad-fix: true
+lily-pad-fix: true
+#Inform your players that they are using an outdated minecraft version
+#max-version specifies the maximum protocol version of players being notified. See http://wiki.vg/Protocol_version_numbers for protocol version numbers
+#interval can be set to JOIN to notify players when joining the server. If you set it to any integer number it will broadcast the message every x ticks.
+versioninfo:
+  active: false
+  max-version: 47
+  interval: JOIN
+  message: '&7[&6Info&7] This server is running Minecraft %version%. The best gameplay experience is only guaranteed if you are using this version.'