feat(ipcheck): implement webhook reporting functionality

src/main/java/uranium/Main.java

@@ -7,6 +7,7 @@ import org.bukkit.plugin.java.JavaPlugin;
 import org.bukkit.plugin.messaging.PluginMessageListener;
 
 import uranium.listeners.*;
+import uranium.tasks.IPCheck;
 import uranium.user.*;
 
 public class Main extends JavaPlugin implements PluginMessageListener {
@@ -38,7 +39,8 @@ public class Main extends JavaPlugin implements PluginMessageListener {
     }
 
     private void setupTasks() {
-
+        getLogger().info("Initializing tasks...");
+        getServer().getScheduler().scheduleSyncRepeatingTask(this, new IPCheck(this), 30, 30); // 1.5 seconds
     }
 
     private void setupPluginChannels() {

src/main/java/uranium/tasks/IPCheck.java

@@ -4,6 +4,7 @@ import org.bukkit.entity.Player;
 import uranium.Main;
 import uranium.user.UserManager;
 import uranium.util.Util;
+import uranium.util.WebhookUtil;
 
 import java.util.List;
 
@@ -37,6 +38,14 @@ public class IPCheck implements Runnable {
                         Util.sendStaff(prefix + "&c" + user.getName() + "&7 joined using the debug runtime.");
                     else
                         Util.sendStaff(prefix + "&c" + user.getName() + "&7 joined using a strange domain: &c" + user.getDomain());
+
+                    if (plugin.getConfig().getBoolean("suspicious-domains.enable-webhook"))
+                        WebhookUtil.sendSusDomain(user.getName(),
+                                                  user.getDomain().equalsIgnoreCase("null")
+                                                  ? "Offline Download"
+                                                  : user.getDomain().equalsIgnoreCase("")
+                                                  ? "Debug Runtime"
+                                                  : user.getDomain());
                 });
             }
         });

src/main/java/uranium/util/WebhookUtil.java

@@ -0,0 +1,60 @@
+package uranium.util;
+
+import club.minnced.discord.webhook.WebhookClient;
+import club.minnced.discord.webhook.WebhookClientBuilder;
+import club.minnced.discord.webhook.send.WebhookEmbed;
+import club.minnced.discord.webhook.send.WebhookEmbedBuilder;
+import org.bukkit.plugin.java.JavaPlugin;
+import uranium.Main;
+
+public class WebhookUtil {
+
+    private static final Main plugin;
+
+    static {
+        plugin = JavaPlugin.getPlugin(Main.class);
+    }
+
+    private static String filterForDiscord(String message) {
+        return message
+            .replace("_", "\\_")
+            .replace("*", "\\*")
+            .replace("~", "\\~")
+            .replace("`", "\\`")
+            .replace("|", "\\|")
+            .replace("> ", "\\> ")
+            .replace("@everyone", "")
+            .replace("@here", "");
+    }
+
+    public static void sendSusDomain(String username, String domain) {
+        String webhookURI = plugin.getConfig().getString("suspicious-domains.webhook-url");
+        if (webhookURI.equalsIgnoreCase("")) {
+            plugin.getLogger().warning("The webhook URL for suspicious domains has been incorrectly configured.");
+            return;
+        }
+        WebhookClientBuilder builder = new WebhookClientBuilder(webhookURI);
+        builder.setThreadFactory((job) -> {
+            Thread thread = new Thread(job);
+            thread.setName("Webhook");
+            thread.setDaemon(true);
+            return thread;
+        });
+        builder.setWait(true);
+        try (WebhookClient client = builder.build()) {
+            WebhookEmbed embed = new WebhookEmbedBuilder()
+                .setColor(0xFF0000)
+                .setDescription("A user has logged onto the server using a suspicious domain.")
+                .addField(new WebhookEmbed.EmbedField(true, "Username", filterForDiscord(username)))
+                .addField(new WebhookEmbed.EmbedField(true, "Domain", "http://" + filterForDiscord(domain)))
+                .build();
+
+            client.send(embed);
+        } catch(Exception ex) {
+            plugin.getLogger().severe("An error occurred while attempting to deliver the webhook. Please report the following stacktrace to Cold.");
+            plugin.getLogger().severe("Webhook URL: " + webhookURI);
+            ex.printStackTrace();
+        }
+    }
+
+}