#versions reports versions for modloader, game and loaded mods (where available)

Author: ago1024

modules/modlauncher/pom.xml

@@ -17,7 +17,7 @@
 		<dependency>
 			<groupId>org.gotti.wurmunlimited</groupId>
 			<artifactId>modloader-shared</artifactId>
-			<version>0.13</version>
+			<version>0.14</version>
 		</dependency>
 		<dependency>
 			<groupId>org.gotti.wurmunlimited</groupId>

modules/modlauncher/src/main/java/org/gotti/wurmunlimited/modloader/server/Listeners.java

@@ -12,23 +12,51 @@
 
 import org.gotti.wurmunlimited.modloader.interfaces.WurmServerMod;
 
+/**
+ * Listeners management
+ *
+ * @param <T> Listener type
+ * @param <V> Listener return type
+ */
 public class Listeners<T, V> {
 
 	private static final Logger LOGGER = Logger.getLogger(Listeners.class.getName());
 
 	private List<T> listeners = new CopyOnWriteArrayList<>();
 	private Class<T> listenerClass;
 
+	/**
+	 * Create listeners manager
+	 * @param listenerClass listener class type
+	 */
 	public Listeners(Class<T> listenerClass) {
 		this.listenerClass = listenerClass;
 	}
 
+	/**
+	 * Add a mod if it implements the listener
+	 * @param mod mod to add
+	 */
 	public void add(WurmServerMod mod) {
 		if (this.listenerClass.isInstance(mod) && !listeners.contains(mod)) {
 			listeners.add(listenerClass.cast(mod));
 		}
 	}
 
+	/**
+	 * Add a listener
+	 * @param listener listener to add
+	 */
+	public void add(T listener) {
+		if (!listeners.contains(listener)) {
+			listeners.add(listener);
+		}
+	}
+
+	/**
+	 * Process listeners
+	 * @param handler consumer which is called for each listener
+	 */
 	public void fire(Consumer<T> handler) {
 		listeners.forEach(listener -> {
 			try {
@@ -39,6 +67,13 @@ public void fire(Consumer<T> handler) {
 		});
 	}
 
+	/**
+	 * Process listeners
+	 * @param handler consumer which is called for each listener
+	 * @param onFailure supplier which is called if a listener threw an exception
+	 * @param combiner combine results of each listener
+	 * @return combined results
+	 */
 	public Optional<V> fire(Function<T, V> handler, Supplier<V> onFailure,  BinaryOperator<V> combiner) {
 		return listeners
 			.stream()

modules/modlauncher/src/main/java/org/gotti/wurmunlimited/modloader/server/ServerHook.java

@@ -1,12 +1,14 @@
 package org.gotti.wurmunlimited.modloader.server;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 import org.gotti.wurmunlimited.modcomm.ModComm;
 import org.gotti.wurmunlimited.modloader.interfaces.ChannelMessageListener;
 import org.gotti.wurmunlimited.modloader.interfaces.ItemTemplatesCreatedListener;
 import org.gotti.wurmunlimited.modloader.interfaces.MessagePolicy;
+import org.gotti.wurmunlimited.modloader.interfaces.ModEntry;
 import org.gotti.wurmunlimited.modloader.interfaces.PlayerLoginListener;
 import org.gotti.wurmunlimited.modloader.interfaces.PlayerMessageListener;
 import org.gotti.wurmunlimited.modloader.interfaces.ServerPollListener;
@@ -15,6 +17,7 @@
 import org.gotti.wurmunlimited.modloader.interfaces.WurmServerMod;
 
 import com.wurmonline.server.Message;
+import com.wurmonline.server.MiscConstants;
 import com.wurmonline.server.creatures.Communicator;
 import com.wurmonline.server.players.Player;
 import com.wurmonline.server.villages.PvPAlliance;
@@ -36,12 +39,41 @@ public class ServerHook {
 	protected ServerHook() {
 	}
 
-	public void addMods(List<WurmServerMod> wurmMods) {
-		wurmMods.forEach(mod -> {
-			handlers.forEach(handler -> handler.add(mod));
+	public void addMods(List<? extends ModEntry<WurmServerMod>> wurmMods) {
+		wurmMods.forEach(entry -> {
+			handlers.forEach(handler -> handler.add(entry.getWurmMod()));
 		});
 	}
 
+	private String formatVersion(String name, String version) {
+		return String.format("%s version: %s", name, version == null ? "unversioned" : version);
+	}
+
+	public void addVersionHandler(String modloaderVersion, String gameVersion, List<? extends ModEntry<WurmServerMod>> wurmMods) {
+		playerMessage.add(new PlayerMessageListener() {
+
+			@Override
+			public MessagePolicy onPlayerMessage(Communicator communicator, String message, String title) {
+				if (communicator.getPlayer().getPower() > MiscConstants.POWER_HERO && message != null && message.startsWith("#versions")) {
+					List<String> versions = new ArrayList<>();
+					versions.add(formatVersion("game", gameVersion));
+					versions.add(formatVersion("modloader", modloaderVersion));
+					wurmMods.forEach(entry -> versions.add(formatVersion(entry.getName(), entry.getWurmMod().getVersion())));
+
+					versions.forEach(version -> communicator.sendNormalServerMessage(version));
+					return MessagePolicy.DISCARD;
+				}
+				return MessagePolicy.PASS;
+			}
+			
+			@Override
+			public boolean onPlayerMessage(Communicator communicator, String message) {
+				// unused legacy
+				return false;
+			}
+		});
+	}
+
 	public void fireOnServerStarted() {
 		ModComm.serverStarted();
 		serverStarted.fire(listener -> listener.onServerStarted());

modules/modlauncher/src/main/java/org/gotti/wurmunlimited/serverlauncher/DelegatedLauncher.java

@@ -7,6 +7,7 @@
 
 import org.gotti.wurmunlimited.modloader.ModLoader;
 import org.gotti.wurmunlimited.modloader.classhooks.HookManager;
+import org.gotti.wurmunlimited.modloader.interfaces.ModEntry;
 import org.gotti.wurmunlimited.modloader.interfaces.WurmServerMod;
 import org.gotti.wurmunlimited.modloader.server.ServerHook;
 
@@ -15,8 +16,12 @@ public class DelegatedLauncher {
 	public static void main(String[] args) {
 
 		try {
-			List<WurmServerMod> wurmMods = new ModLoader().loadModsFromModDir(Paths.get("mods"));
-			ServerHook.createServerHook().addMods(wurmMods);
+			ModLoader modLoader = new ModLoader();
+			List<? extends ModEntry<WurmServerMod>> wurmMods = modLoader.loadModsFromModDir(Paths.get("mods"));
+			
+			ServerHook serverHook = ServerHook.createServerHook();
+			serverHook.addMods(wurmMods);
+			serverHook.addVersionHandler(modLoader.getVersion(), modLoader.getGameVersion(), wurmMods);
 			HookManager.getInstance().initCallbacks();
 
 			String[] classes = {