fixed issues.

Author: Neil-Tomar

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

@@ -10,6 +10,8 @@
 import net.dv8tion.jda.api.components.selections.SelectOption;
 import net.dv8tion.jda.api.components.selections.StringSelectMenu;
 import net.dv8tion.jda.api.entities.Member;
+import net.dv8tion.jda.api.entities.Message;
+import java.util.stream.Stream;
 import net.dv8tion.jda.api.events.interaction.component.ButtonInteractionEvent;
 import net.dv8tion.jda.api.events.interaction.component.StringSelectInteractionEvent;
 import org.jspecify.annotations.NonNull;
@@ -104,10 +106,41 @@ public void handleStringSelectMenu(@NonNull StringSelectInteractionEvent event,
 		Language language = Language.fromString(values.getFirst());
 		event.deferEdit().queue();
 
+		Runnable onError = () -> Responses.error(event.getHook(),
+				"Could not update the code block — it may have changed or no longer be yours.").queue();
 		LinkedMessages.resolveAfter(event.getMessage(), Integer.parseInt(id[2]),
-				messages -> messages.forEach(message ->
-						message.editMessage(withLanguage(message.getContentRaw(), language)).queue()),
-						() -> Responses.error(event.getHook(),"Could not update the code block").queue());
+				messages -> {
+					if (ownsBlock(messages, event.getUser().getIdLong())) {
+						messages.forEach(message ->
+								message.editMessage(withLanguage(message.getContentRaw(), language)).queue());
+					} else {
+						onError.run();
+					}
+				},
+				onError);
+	}
+
+	private static boolean ownsBlock(List<Message> messages, long userId) {
+		Message last = messages.get(messages.size() - 1);
+		boolean lastIsUsers = buttonsOf(last).anyMatch(button -> isDeleteButtonOf(button, userId));
+		boolean noOtherHasButton = messages.subList(0, messages.size() - 1).stream()
+				.flatMap(FormatCodeInteractionHandler::buttonsOf)
+				.noneMatch(FormatCodeInteractionHandler::isDeleteButton);
+		return lastIsUsers && noOtherHasButton;
+	}
+
+	private static Stream<Button> buttonsOf(Message message) {
+		return message.getComponents().stream()
+				.flatMap(component -> component instanceof ActionRow row ? row.getButtons().stream() : Stream.of());
+	}
+
+	private static boolean isDeleteButton(Button button) {
+		return button.getCustomId() != null && button.getCustomId().startsWith(COMPONENT_ID + ":");
+	}
+
+	private static boolean isDeleteButtonOf(Button button, long userId) {
+		return isDeleteButton(button)
+				&& Long.parseLong(ComponentIdBuilder.split(button.getCustomId())[1]) == userId;
 	}
 
 	private boolean canManage(Member member, long requesterId) {