remake in Golang

api/config.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+
+	"gitea.iceberg-gaming.com/17th-Ranger-Battalion-ORG/17th-UnitTracker-API/logger"
+
+	"github.com/spf13/viper"
+)
+
+var Config *viper.Viper
+
+func LoadConfig() error {
+	setConfigDefaults()
+
+	// Read in environment variables
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// Use config file (like json or yaml)
+	// viper.SetConfigName("config") // name of config file (without extension)
+	// viper.SetConfigType("yaml")   // REQUIRED if the config file does not have the extension in the name
+	// Use .env file
+	viper.SetConfigFile(".env") // name of config file (without extension
+
+	// viper.AddConfigPath("/etc/appname/")  // path to look for the config file in
+	// viper.AddConfigPath("$HOME/.appname") // call multiple times to add many search paths
+	viper.AddConfigPath(".") // optionally look for config in the working directory
+
+	err := viper.ReadInConfig() // Find and read the config file
+	if err != nil {             // Handle errors reading the config file
+		return fmt.Errorf("fatal error config file: %w", err)
+	}
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			// Config file not found; ignore error if desired
+			return fmt.Errorf("config file not found: %w", err)
+		} else {
+			// Config file was found but another error was produced
+			return fmt.Errorf("fatal error config file: %w", err)
+		}
+	}
+
+	// Config file found and successfully parsed
+	Config = viper.GetViper()
+
+	logger.Log.Debug().Interface("config", Config.AllSettings()).Msg("Configuration loaded")
+	return nil
+}
+
+func setConfigDefaults() {
+	viper.SetDefault("MARIADB_CONNSTRING", "user:password@tcp(localhost:3306)/dbname?parseTime=true")
+	viper.SetDefault("API_PREFIX", "/api/v1")
+	viper.SetDefault("API_PORT", "1323")
+}