Add greeting for new players through /tutorial

src/main/java/com/hackclub/hccore/HCCorePlugin.java

@@ -15,6 +15,7 @@
 import com.hackclub.hccore.commands.SpawnCommand;
 import com.hackclub.hccore.commands.StatsCommand;
 import com.hackclub.hccore.commands.TableflipCommand;
+import com.hackclub.hccore.commands.TutorialCommand;
 import com.hackclub.hccore.listeners.AFKListener;
 import com.hackclub.hccore.listeners.AdvancementListener;
 import com.hackclub.hccore.listeners.BeehiveInteractionListener;
@@ -63,6 +64,7 @@ public void onEnable() {
         this.getCommand("spawn").setExecutor(new SpawnCommand(this));
         this.getCommand("stats").setExecutor(new StatsCommand(this));
         this.getCommand("tableflip").setExecutor(new TableflipCommand(this));
+        this.getCommand("tutorial").setExecutor(new TutorialCommand(this));
 
         // Register event listeners
         this.getServer().getPluginManager().registerEvents(new AdvancementListener(this), this);

src/main/java/com/hackclub/hccore/commands/TutorialCommand.java

@@ -0,0 +1,33 @@
+package com.hackclub.hccore.commands;
+
+import com.hackclub.hccore.HCCorePlugin;
+import org.bukkit.ChatColor;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class TutorialCommand implements CommandExecutor {
+    private static final String[] message = {ChatColor.RED + "Greetings! Welcome to the Hack Club vanilla Minecraft server!", "You can use /nick to set your nick name and /color to set your chat and name colors", ChatColor.RED + "Rules:\n", "Be nice.",  "No griefing.", "Don't build within 1000 blocks of spawn.", "If you want to contribute to plugin development head on over to the GitHub: " + ChatColor.RED + "https://github.com/hackclub/HCCore/. ", "Type /tutorial to see this at any time."};
+
+    private final HCCorePlugin plugin;
+
+    public TutorialCommand(HCCorePlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command cmd, String alias, String[] args) {
+        if (!(sender instanceof Player)) {
+            sender.sendMessage(ChatColor.RED + "You must be a player to use this");
+            return true;
+        }
+
+        Player player = (Player) sender;
+        for (String i : TutorialCommand.message) {
+            sender.sendMessage(ChatColor.YELLOW + "" + ChatColor.BOLD + i);
+            }
+
+        return true;
+    }
+}

src/main/java/com/hackclub/hccore/listeners/PlayerListener.java

@@ -68,7 +68,11 @@ public void onPlayerJoin(final PlayerJoinEvent event) {
         event.getPlayer().resetTitle();
         event.setJoinMessage(ChatColor.YELLOW
                 + ChatColor.stripColor(event.getPlayer().getDisplayName()) + " joined the game");
-    }
+
+        if (event.getPlayer().hasPlayedBefore() == false) {
+            event.getPlayer().performCommand("tutorial");
+        }
+        }
 
     @EventHandler
     public void onPlayerLogin(final PlayerLoginEvent event) {

src/main/resources/plugin.yml

@@ -32,3 +32,7 @@ commands:
   tableflip:
     description: Appends a tableflip to your message
     usage: /tableflip [message]
+  tutorial:
+    description: Greets new users to the server
+    usage: /tutorial
+