Added welcome message for new players

src/main/java/lusiiplugin/mixin/PlayerManagerMixin.java

@@ -0,0 +1,30 @@
+package lusiiplugin.mixin;
+
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.entity.player.EntityPlayerMP;
+import net.minecraft.server.player.PlayerManager;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.io.File;
+
+@Mixin(value = PlayerManager.class, remap = false)
+public abstract class PlayerManagerMixin {
+
+	@Shadow
+	@Final
+	private MinecraftServer server;
+
+	@Inject(method = "addPlayer", at = @At("HEAD"))
+	private void welcomeMessage(EntityPlayerMP player, CallbackInfo ci) {
+		File playerData = new File("world/players/" + player.username + ".dat");
+
+		if (!playerData.exists()) {
+			server.serverCommandHandler.sendMessageToAllPlayers("§4Welcome §3" + player.username + "§4 to the server!" );
+		}
+	}
+}

src/main/resources/lusiiplugin.mixins.json

@@ -18,6 +18,7 @@
     "EntityTNTMixin",
     "NetServerHandlerMixin",
     "NicknameCommandMixin",
+    "PlayerManagerMixin",
     "SpawnCommandMixin",
     "TreecapitatorMixin"
   ],