feat: Add example of logger usage via DI inject

src/lib/logging/Logger.hpp

@@ -0,0 +1,66 @@
+/**
+ * Canary - A free and open-source MMORPG server emulator
+ * Copyright (©) 2019-2022 OpenTibiaBR <opentibiabr@outlook.com>
+ * Repository: https://github.com/opentibiabr/canary
+ * License: https://github.com/opentibiabr/canary/blob/main/LICENSE
+ * Contributors: https://github.com/opentibiabr/canary/graphs/contributors
+ * Website: https://docs.opentibiabr.com/
+ */
+#ifndef CANARY_ILOGGER_HPP
+#define CANARY_ILOGGER_HPP
+
+#include <fmt/core.h>
+#include <string>
+
+class Logger {
+	public:
+		virtual ~Logger() = default;
+
+		// Ensures that we don't accidentally copy it
+		virtual Logger &operator=(const Logger &) = delete;
+
+		template <typename... Args>
+		void trace(const std::string &format, Args &&... args) {
+			_trace(_format(format, args...));
+		}
+
+		template <typename... Args>
+		void debug(const std::string &format, Args &&... args) {
+			_debug(_format(format, args...));
+		}
+
+		template <typename... Args>
+		void info(const std::string &format, Args &&... args) {
+			_info(_format(format, args...));
+		}
+
+		template <typename... Args>
+		void warn(auto &format, Args &&... args) {
+			_warn(_format(format, args...));
+		}
+
+		template <typename... Args>
+		void error(const std::string &format, Args &&... args) {
+			_error(_format(format, args...));
+		}
+
+		template <typename... Args>
+		void critical(const std::string &format, Args &&... args) {
+			_critical(_format(format, args...));
+		}
+
+	private:
+		template <typename... Args>
+		std::string _format(const std::string &format, Args &&... args) const {
+			return fmt::format(fmt::runtime(format), args...);
+		}
+
+		virtual void _trace(const std::string &format) = 0;
+		virtual void _debug(const std::string &format) = 0;
+		virtual void _info(const std::string &format) = 0;
+		virtual void _warn(const std::string &format) = 0;
+		virtual void _error(const std::string &format) = 0;
+		virtual void _critical(const std::string &format) = 0;
+};
+
+#endif // CANARY_ILOGGER_HPP

src/otserv.cpp

@@ -268,7 +268,7 @@ void mainLoader(int, char*[], ServiceManager* services) {
 	platform = "unknown";
 #endif
 
-	SPDLOG_INFO("Compiled with {}, on {} {}, for platform {}\n", getCompiler(), __DATE__, __TIME__, platform);
+	inject<Logger>().info("Compiled with {}, on {} {}, for platform {}\n", getCompiler(), __DATE__, __TIME__, platform);
 
 #if defined(LUAJIT_VERSION)
 	SPDLOG_INFO("Linked with {} for Lua support", LUAJIT_VERSION);