Better defaults management, logger class implementation with logging levels, and write to file configuration implementation

include/DPMDefaults.hpp

@@ -0,0 +1,52 @@
+/**
+ * @file DPMDefaults.hpp
+ * @brief Default configuration values for the DPM utility
+ *
+ * Defines the DPMDefaults structure which provides default configuration values
+ * for paths, logging settings, and other system-wide defaults used by the DPM
+ * utility when explicit configuration is not provided.
+ *
+ * @copyright Copyright (c) 2025 SILO GROUP LLC
+ * @author Chris Punches <chris.punches@silogroup.org>
+ *
+ * Part of the Dark Horse Linux Package Manager (DPM)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * For bug reports or contributions, please contact the dhlp-contributors
+ * mailing list at: https://lists.darkhorselinux.org/mailman/listinfo/dhlp-contributors
+ */
+
+#pragma once
+
+#include <string>
+#include "LoggingLevels.hpp"
+
+// default system configuration
+struct DPMDefaults {
+    static const char* const    MODULE_PATH;
+    static const char* const    CONFIG_DIR;
+    static const char* const    LOG_FILE;
+    static const bool           write_to_log;
+    static const LoggingLevels  LOG_LEVEL;
+};
+
+// Initialize static constants
+inline const char * const   DPMDefaults::MODULE_PATH    = "/usr/lib/dpm/modules/";
+
+inline const char * const   DPMDefaults::CONFIG_DIR     = "/etc/dpm/conf.d/";
+
+inline const char * const   DPMDefaults::LOG_FILE       = "/var/log/dpm.log";
+inline const bool           DPMDefaults::write_to_log   = false;
+inline const LoggingLevels  DPMDefaults::LOG_LEVEL      = LoggingLevels::INFO;