Ephemeral Replies ('Only You Can See This' Replies)

If you've used a Discord bot, there's a chance that you've encountered a message from one that said "Only you can see this" after you interacted with it (or executed a command). These messages are pretty helpful and can be used in many instances where you'd only like the user that's interacting to see what's going on.

Here's how you can do exactly that!

#include <dpp/dpp.h>
 
int main() {
    /* Create the bot */
    dpp::cluster bot("token");
 
    bot.on_log(dpp::utility::cout_logger());
 
    /* The event is fired when someone issues your commands */
    bot.on_slashcommand([&bot](const dpp::slashcommand_t & event) {
        /* Check which command they ran */
        if (event.command.get_command_name() == "hello") {
            /* Reply to the user, but only let them see the response. */
            event.reply(dpp::message("Hello! How are you today?").set_flags(dpp::m_ephemeral));
        }
    });
 
    bot.on_ready([&bot](const dpp::ready_t & event) {
        if (dpp::run_once<struct register_bot_commands>()) {
            /* Create and Register the command */
            bot.global_command_create(dpp::slashcommand("hello", "Hello there!", bot.me.id));
        }
    });
 
    bot.start(dpp::st_wait);
 
    return 0;
}

That's it! If everything went well, it should look like this: