Delete replies if original message is deleted

src/main/java/org/geysermc/discordbot/GeyserBot.java

@@ -216,6 +216,7 @@ public static void main(String[] args) throws IOException, LoginException {
                             new BadLinksHandler(),
                             new HelpHandler(),
                             new SupportHandler(),
+                            new DeleteHandler(),
                             client.build(),
                             tagClient.build())
                     .build();

src/main/java/org/geysermc/discordbot/listeners/DeleteHandler.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2020-2024 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/GeyserDiscordBot
+ */
+
+package org.geysermc.discordbot.listeners;
+
+import net.dv8tion.jda.api.entities.Message;
+import net.dv8tion.jda.api.entities.MessageHistory;
+import net.dv8tion.jda.api.entities.MessageType;
+import net.dv8tion.jda.api.events.message.MessageDeleteEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import org.jetbrains.annotations.NotNull;
+
+public class DeleteHandler extends ListenerAdapter {
+    @Override
+    public void onMessageDelete(@NotNull MessageDeleteEvent event) {
+        // Get the last 10 messages in the channel and delete any that are inline replies to the deleted message
+        MessageHistory closeMessages = MessageHistory.getHistoryAround(event.getChannel(), event.getMessageId()).limit(10).complete();
+        for (Message message : closeMessages.getRetrievedHistory()) {
+            if (message.getType() == MessageType.INLINE_REPLY
+                && message.getAuthor() == event.getJDA().getSelfUser()
+                && message.getMessageReference().getMessageId().equals(event.getMessageId())) {
+                message.delete().complete();
+            }
+        }
+    }
+}