base creation

backend/config/config.go

@@ -0,0 +1,55 @@
+package config
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+
+	"github.com/joho/godotenv"
+)
+
+type ApplicationConfig struct {
+	Port int64
+}
+
+func LoadApplicationConfig() (error, *ApplicationConfig) {
+
+	err := godotenv.Load()
+
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+
+	err, portString := getVar("PORT", "8080", true)
+	if err != nil {
+		return err, nil
+	}
+
+	port, err := strconv.ParseInt(portString, 10, 64)
+	if err != nil {
+		return err, nil
+	}
+
+	return nil, &ApplicationConfig{
+		Port: port,
+	}
+
+}
+
+func getVar(varName string, defaultValue string, isRequired bool) (error, string) {
+	varValue := os.Getenv(varName)
+
+	if varValue == "" {
+
+		if isRequired {
+			return fmt.Errorf("%s is missing and required : ", varName), ""
+		}
+
+		return nil, defaultValue
+
+	}
+
+	return nil, varValue
+
+}