From 8cb168260a2f75b8a703dfaaae002ff0f47e7b27 Mon Sep 17 00:00:00 2001
From: "Timothy Roe, Jr" <timroejr@msn.com>
Date: Sun, 19 Apr 2020 00:44:10 -0700
Subject: [PATCH] Added Activity to Discord Bot to show number of Users Online.

---
 .../uk/co/angrybee/joe/DiscordClient.java     |  4 ++++
 .../co/angrybee/joe/DiscordWhitelister.java   | 23 ++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/main/java/uk/co/angrybee/joe/DiscordClient.java b/src/main/java/uk/co/angrybee/joe/DiscordClient.java
index 434016c..a709537 100644
--- a/src/main/java/uk/co/angrybee/joe/DiscordClient.java
+++ b/src/main/java/uk/co/angrybee/joe/DiscordClient.java
@@ -110,6 +110,10 @@ public class DiscordClient extends ListenerAdapter {
         }
     }
 
+    public static void onServerPlayerCountChange(int playerCount) {
+        javaDiscordAPI.getPresence().setActivity(Activity.watching(playerCount + "/" + DiscordWhitelister.getMaximumAllowedPlayers() + " players."));
+    }
+
     @Override
     public void onMessageReceived(MessageReceivedEvent messageReceivedEvent) {
         if (messageReceivedEvent.isFromType(ChannelType.TEXT)) {
diff --git a/src/main/java/uk/co/angrybee/joe/DiscordWhitelister.java b/src/main/java/uk/co/angrybee/joe/DiscordWhitelister.java
index e464a2e..e810aa6 100755
--- a/src/main/java/uk/co/angrybee/joe/DiscordWhitelister.java
+++ b/src/main/java/uk/co/angrybee/joe/DiscordWhitelister.java
@@ -5,6 +5,10 @@ import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.bukkit.event.Listener;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
 import uk.co.angrybee.joe.Commands.CommandAbout;
 import uk.co.angrybee.joe.Commands.CommandStatus;
 
@@ -12,7 +16,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.*;
 
-public class DiscordWhitelister extends JavaPlugin
+public class DiscordWhitelister extends JavaPlugin implements Listener
 {
     private static File whitelisterBotConfigFile;
     private static File userListFile;
@@ -113,6 +117,9 @@ public class DiscordWhitelister extends JavaPlugin
                 getLogger().severe("Discord Client failed to initialize, please check if your config file is valid.");
             }
         }
+
+        this.getServer().getPluginManager().registerEvents(this, this);
+
     }
 
     public static JavaPlugin getPlugin()
@@ -171,6 +178,20 @@ public class DiscordWhitelister extends JavaPlugin
         getUserList().save(getUserListFile().getPath());
     }
 
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        DiscordClient.onServerPlayerCountChange(getOnlineUsers());
+    }
+
+    @EventHandler
+    public void onPlayerLeave(PlayerQuitEvent event) {
+        DiscordClient.onServerPlayerCountChange(getOnlineUsers() - 1);
+    }
+
+    public static int getOnlineUsers() { return thisPlugin.getServer().getOnlinePlayers().size(); }
+
+    public static int getMaximumAllowedPlayers() { return thisPlugin.getServer().getMaxPlayers(); }
+
     public void ConfigSetup()
     {
         whitelisterBotConfigFile = new File(getDataFolder(), "discord-whitelister.yml");