Add SlashCommandListener.java

src/main/java/me/goudham/bot/EnsoBot.java

@@ -3,6 +3,7 @@ package me.goudham.bot;
 import jakarta.inject.Inject;
 import jakarta.inject.Singleton;
 import me.goudham.command.CommandManager;
+import me.goudham.listener.SlashCommandListener;
 import net.dv8tion.jda.api.JDA;
 import net.dv8tion.jda.api.entities.Guild;
 
@@ -22,6 +23,11 @@ public class EnsoBot implements Bot {
     @Override
     public void startup() throws InterruptedException {
         jda.awaitReady();
+        addEventListeners();
         commandManager.registerSlashCommands(guild);
     }
+
+    private void addEventListeners() {
+        jda.addEventListener(new SlashCommandListener(commandManager));
+    }
 }

src/main/java/me/goudham/listener/SlashCommandListener.java

@@ -0,0 +1,24 @@
+package me.goudham.listener;
+
+import jakarta.inject.Inject;
+import jakarta.inject.Singleton;
+import me.goudham.command.CommandManager;
+import net.dv8tion.jda.api.events.interaction.SlashCommandEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import org.jetbrains.annotations.NotNull;
+
+@Singleton
+public class SlashCommandListener extends ListenerAdapter {
+    private final CommandManager commandManager;
+
+    @Inject
+    public SlashCommandListener(CommandManager commandManager) {
+        this.commandManager = commandManager;
+    }
+
+    @Override
+    public void onSlashCommand(@NotNull SlashCommandEvent event) {
+        if (event.getGuild() == null) return;
+        commandManager.handleSlashCommandEvent(event);
+    }
+}