Integrating with spdlog

If you want to make your bot use spdlog, like aegis does, you can attach it to the on_log event. You can do this as follows:

#include <dpp/dpp.h>
#include <dpp/fmt/format.h>
#include <spdlog/spdlog.h>
#include <spdlog/async.h>
#include <spdlog/sinks/stdout_color_sinks.h>
#include <spdlog/sinks/rotating_file_sink.h>
#include <iomanip>
 
int main(int argc, char const *argv[])
{
    dpp::cluster bot("token");
 
    const std::string log_name = "mybot.log";
 
    /* Set up spdlog logger */
    std::shared_ptr<spdlog::logger> log;
    spdlog::init_thread_pool(8192, 2);
    std::vector<spdlog::sink_ptr> sinks;
    auto stdout_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt >();
    auto rotating = std::make_shared<spdlog::sinks::rotating_file_sink_mt>(log_name, 1024 * 1024 * 5, 10);
    sinks.push_back(stdout_sink);
    sinks.push_back(rotating);
    log = std::make_shared<spdlog::async_logger>("logs", sinks.begin(), sinks.end(), spdlog::thread_pool(), spdlog::async_overflow_policy::block);
    spdlog::register_logger(log);
    log->set_pattern("%^%Y-%m-%d %H:%M:%S.%e [%L] [th#%t]%$ : %v");
    log->set_level(spdlog::level::level_enum::debug);
 
    /* Integrate spdlog logger to D++ log events */
    bot.on_log([&bot, &log](const dpp::log_t & event) {
        switch (event.severity) {
            case dpp::ll_trace:
                log->trace("{}", event.message);
            break;
            case dpp::ll_debug:
                log->debug("{}", event.message);
            break;
            case dpp::ll_info:
                log->info("{}", event.message);
            break;
            case dpp::ll_warning:
                log->warn("{}", event.message);
            break;
            case dpp::ll_error:
                log->error("{}", event.message);
            break;
            case dpp::ll_critical:
            default:
                log->critical("{}", event.message);
            break;
        }
    });
 
    /* Add the rest of your events */
 
    bot.start(false);
    return 0;
}