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DPP-master/docpages/example_programs/misc/spdlog.md

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+\page spdlog 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:
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~cpp
+#include <spdlog/spdlog.h>
+#include <spdlog/async.h>
+#include <spdlog/sinks/stdout_color_sinks.h>
+#include <spdlog/sinks/rotating_file_sink.h>
+#include <iomanip>
+#include <dpp/dpp.h>
+#include <fmt/format.h>
+
+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(dpp::st_wait);
+	return 0;
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~