fix: minor fixes

Author: Neil-Tomar

src/main/java/net/discordjug/javabot/systems/user_commands/format_code/FormatCodeCommand.java

@@ -68,18 +68,20 @@ public void execute(@NotNull SlashCommandInteractionEvent event) {
 						if (target != null) {
 							sendFormattedCode(event, target, language, indentation);
 						} else {
-							Responses.error(event, "Could not find message; please specify a message id.").queue();
+							Responses.errorWithTitle(event, "Message Not Found", "No recent user message could be found. Please specify a message ID.")
+									.queue();
 						}
 					});
 		} else {
 			if (Checks.isInvalidLongInput(idOption)) {
-				Responses.error(event, "Please provide a valid message id!").queue();
+				Responses.errorWithTitle(event, "Invalid Message ID", "Please provide a valid Discord message ID.")
+				.queue();
 				return;
 			}
 			long messageId = idOption.getAsLong();
 			event.getChannel().retrieveMessageById(messageId).queue(
 					target -> sendFormattedCode(event, target, language, indentation),
-					e -> Responses.error(event, "Could not retrieve message with id: " + messageId).queue());
+					error -> Responses.errorWithTitle(event, "Message Not Found", "Could not retrieve the message with ID `" + messageId + "`. Make sure the message exists and is accessible.").queue());
 		}
 	}
 

src/main/java/net/discordjug/javabot/systems/user_commands/format_code/FormatCodeDispatcher.java

@@ -21,6 +21,11 @@
  */
 class FormatCodeDispatcher {
 
+	/**
+	 * The maximum number of code-block messages to post inline; longer code is sent only as a file.
+	 */
+	private static final int MAX_MESSAGES = 5;
+
 	/**
 	 * Acknowledges the interaction by replying with the full code as a file, then posts the code as
 	 * ordered code-block messages. Replies with an error instead if there is nothing to format.
@@ -32,7 +37,7 @@ class FormatCodeDispatcher {
 	 */
 	public static void sendCode(Code code, @Nonnull CommandInteraction event, Message target){
 		if (code.getContent().isBlank()) {
-			Responses.error(event, "There is no code to format in that message.").queue();
+			Responses.errorWithTitle(event, "404 Code not found","There is no code to format in that message.").queue();
 			return;
 		}
 
@@ -58,6 +63,11 @@ private static void sendChunksInOrder(MessageChannel channel, List<String> messa
 		if (index >= messages.size()) {
 			return;
 		}
+		if (messages.size() > MAX_MESSAGES) {
+			Responses.errorWithTitle(event.getHook(), "Output Too Large", "The formatted result is too large to send. Please provide a smaller code snippet or use a paste service instead."
+			).queue();
+			return;
+		}
 		var action = channel.sendMessage(messages.get(index))
 				.setAllowedMentions(List.of());
 

src/main/java/net/discordjug/javabot/systems/user_commands/format_code/Language.java

@@ -78,6 +78,10 @@ public enum Language {
 	 * Extensible Markup Language.
 	 */
 	XML("XML", "xml"),
+	/**
+	 * A structured data format.
+	 */
+	JSON("JSON", "json"),
 	/**
 	 * Fallback used when the language is unrecognised; renders as plain text.
 	 */

src/main/java/net/discordjug/javabot/util/Responses.java

@@ -62,6 +62,11 @@ private Responses() {
 		return reply(event, title, String.format(message, args), Type.ERROR.getColor(), true);
 	}
 
+	@CheckReturnValue
+	public static @NotNull WebhookMessageCreateAction<Message> errorWithTitle(InteractionHook hook, String title, String message, Object... args) {
+		return reply(hook, title, String.format(message, args), Type.ERROR.getColor(), true);
+	}
+
 	@CheckReturnValue
 	public static @NotNull WebhookMessageCreateAction<Message> error(InteractionHook hook, String message, Object... args) {
 		return reply(hook, "An Error Occurred", String.format(message, args), Type.ERROR.getColor(), true);