FA_Gateway_Java/src/config.java

import lombok.Getter;
import lombok.Setter;
import org.tinylog.Logger;

import java.nio.file.Files;
import java.nio.file.Path;

public class config {
    @Getter @Setter int Modbus_Port ;
    @Getter @Setter String Modbus_MasterIP;
    @Getter @Setter String Modbus_SlaveID ;
    @Getter @Setter String VX3KTargetIP;
    @Getter @Setter int VX3KTargetPort;
    @Getter @Setter String Email_SMTPServer;
    @Getter @Setter int Email_SMTPPort;
    @Getter @Setter boolean Email_SMTPSSL;
    @Getter @Setter String Email_SMTPUsername;
    @Getter @Setter String Email_SMTPPassword;
    @Getter @Setter String Email_SMTPFrom ;
    @Getter @Setter String Email_SenderName;
    @Getter @Setter String Email_Subject;
    @Getter @Setter String MQTT_Broker;
    @Getter @Setter int MQTT_Port;
    @Getter @Setter String MQTT_Topic ;
    @Getter @Setter String MQTT_ClientID;
    @Getter @Setter String MQTT_Username;
    @Getter @Setter String MQTT_Password ;
    @Getter @Setter String WebListenPort;

    /**
     * Load configuration from file.
     * If the file does not exist, create default configuration.
     */
    public void Load(){
        Path configPath = Path.of(Somecodes.currentdirectory, "config.json");
        if (Files.exists(configPath)){
            // Read the configuration from the file
            // and if not complete, create defaults
            try{
                String configContent = Files.readString(configPath);
                Logger.info("config content: {}", configContent);
                config loadedConfig = Somecodes.gson.fromJson(configContent, config.class);
                Logger.info("Loaded config from {}", loadedConfig.toString());
                if (loadedConfig != null) {
                    // Copy values from loadedConfig to this instance
                    this.Modbus_MasterIP = loadedConfig.Modbus_MasterIP;
                    this.Modbus_Port = loadedConfig.Modbus_Port;
                    this.Modbus_SlaveID = loadedConfig.Modbus_SlaveID;
                    this.VX3KTargetIP = loadedConfig.VX3KTargetIP;
                    this.VX3KTargetPort = loadedConfig.VX3KTargetPort;
                    this.Email_SMTPServer = loadedConfig.Email_SMTPServer;
                    this.Email_SMTPPort = loadedConfig.Email_SMTPPort;
                    this.Email_SMTPSSL = loadedConfig.Email_SMTPSSL;
                    this.Email_SMTPUsername = loadedConfig.Email_SMTPUsername;
                    this.Email_SMTPPassword = loadedConfig.Email_SMTPPassword;
                    this.Email_SMTPFrom = loadedConfig.Email_SMTPFrom;
                    this.Email_SenderName = loadedConfig.Email_SenderName;
                    this.Email_Subject = loadedConfig.Email_Subject;
                    this.MQTT_Broker = loadedConfig.MQTT_Broker;
                    this.MQTT_Port = loadedConfig.MQTT_Port;
                    this.MQTT_Topic = loadedConfig.MQTT_Topic;
                    this.MQTT_ClientID = loadedConfig.MQTT_ClientID;
                    this.MQTT_Username = loadedConfig.MQTT_Username;
                    this.MQTT_Password = loadedConfig.MQTT_Password;
                    this.WebListenPort = loadedConfig.WebListenPort;

                } else {
                    Logger.error("Loaded config is null, creating Default Config");
                    MakeDefaults();
                }
            } catch (Exception e){
                Logger.error("Failed to read config file: {}, creating Default Config", e.getMessage());
                MakeDefaults();
            }
        } else {
            Logger.error("Config file not found at {}, creating Default Config", configPath.toAbsolutePath());
            MakeDefaults();
        }
    }

    /**
     * Create default configuration values.
     * This method sets default values for all configuration fields.
     */
    private void MakeDefaults() {
        // Set default values if needed
        Modbus_MasterIP = "192.168.10.1";
        Modbus_Port = 502;
        Modbus_SlaveID = "1";
        VX3KTargetIP = "192.168.14.1";
        VX3KTargetPort = 5000;
        Email_SMTPServer = "mail.galva.co.id";
        Email_SMTPPort = 587;
         Email_SMTPSSL = true;
         Email_SMTPUsername = "admin";
         Email_SMTPPassword = "admin";
         Email_SMTPFrom = "fa@galva.co.id";
         Email_SenderName = "Fire Alarm Gateway";
         Email_Subject = "Fire Alarm Gateway Notification";
         MQTT_Broker = "34.101.202.96";
         MQTT_Port = 1883;
         MQTT_Topic = "FA_Gateway/status";
         MQTT_ClientID = "Pekojan";
         MQTT_Username = "gtcdev";
         MQTT_Password = "gtcdev2025";
         WebListenPort = "80";
        Save();
        
    }

    /**
     * Save the current configuration to a file.
     * This method serializes the configuration object to JSON and writes it to a file.
     * @return true if the save operation was successful, false otherwise.
     */
    public boolean Save(){
        Path configPath = Path.of(Somecodes.currentdirectory, "config.json");
        String gs = Somecodes.gson.toJson(this);
        try {
            Files.writeString(configPath, gs);
            Logger.info("Default config written to {}", configPath.toAbsolutePath());
            return true;
        } catch (Exception e) {
            Logger.error("Failed to write default config: {}", e.getMessage());
        }
        return false;
    }
}