Implemented message-splitting for messages for >2000 chars in length

Author: jasonlessenich

src/main/java/net/javadiscord/javabot/listener/QOTWSubmissionListener.java

@@ -0,0 +1,41 @@
+package net.javadiscord.javabot.listener;
+
+import lombok.RequiredArgsConstructor;
+import net.dv8tion.jda.api.entities.channel.ChannelType;
+import net.dv8tion.jda.api.entities.channel.concrete.ThreadChannel;
+import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import net.dv8tion.jda.api.interactions.components.buttons.Button;
+import net.javadiscord.javabot.data.config.BotConfig;
+import net.javadiscord.javabot.data.config.guild.QOTWConfig;
+import net.javadiscord.javabot.util.InteractionUtils;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Listens for new messages inside QOTW submissions and warns the author about the webhook limitations.
+ */
+@RequiredArgsConstructor
+public class QOTWSubmissionListener extends ListenerAdapter {
+	private final BotConfig config;
+
+	@Override
+	public void onMessageReceived(@NotNull MessageReceivedEvent event) {
+		if (!event.isFromGuild() || !event.isFromThread() || event.getChannelType() != ChannelType.GUILD_PRIVATE_THREAD) {
+			return;
+		}
+		QOTWConfig qotwConfig = config.get(event.getGuild()).getQotwConfig();
+		ThreadChannel thread = event.getChannel().asThreadChannel();
+		if (thread.getParentChannel().getIdLong() != qotwConfig.getSubmissionChannelId()) {
+			return;
+		}
+		if (event.getMessage().getContentRaw().length() > 2000) {
+			event.getChannel().sendMessageFormat("""
+									Hey %s!
+									Please keep in mind that messages **over 2000 characters** get split in half due to webhook limitations.
+									If you want to make sure that your submission is properly formatted, split your message into smaller chunks instead.""",
+							event.getAuthor().getAsMention())
+					.setActionRow(Button.secondary(InteractionUtils.DELETE_ORIGINAL_TEMPLATE, "\uD83D\uDDD1️"))
+					.queue();
+		}
+	}
+}

src/main/java/net/javadiscord/javabot/systems/qotw/submissions/SubmissionManager.java

@@ -178,8 +178,14 @@ public void acceptSubmission(InteractionHook hook, @NotNull ThreadChannel thread
 			getMessagesByUser(thread, author).thenAccept(messages -> {
 				for (Message message : messages) {
 					if (message.getAuthor().isBot() || message.getType() != MessageType.DEFAULT) continue;
-					WebhookUtil.ensureWebhookExists(newestPost.getParentChannel().asForumChannel(), wh ->
-							WebhookUtil.mirrorMessageToWebhook(wh, message, message.getContentRaw(), newestPost.getIdLong()));
+					WebhookUtil.ensureWebhookExists(newestPost.getParentChannel().asForumChannel(), wh -> {
+						if (message.getContentRaw().length() > 2000) {
+							WebhookUtil.mirrorMessageToWebhook(wh, message, message.getContentRaw().substring(0, 2000), newestPost.getIdLong());
+							WebhookUtil.mirrorMessageToWebhook(wh, message, message.getContentRaw().substring(2001), newestPost.getIdLong());
+						} else {
+							WebhookUtil.mirrorMessageToWebhook(wh, message, message.getContentRaw(), newestPost.getIdLong());
+						}
+					});
 				}
 				newestPost.sendMessageEmbeds(buildAuthorEmbed(author, bestAnswer)).queue();
 			});