feat: add pkg for external usage later

pkg/config/config.go

@@ -0,0 +1,99 @@
+package config
+
+import (
+	"log"
+	"os"
+
+	"github.com/spf13/viper"
+)
+
+func ProvideConfig(path string) func() (Configuration, error) {
+	return func() (Configuration, error) {
+		return LoadConfig(path)
+	}
+}
+
+type Configuration struct {
+	AppName string `mapstructure:"APP_NAME"`
+	AppEnv  string `mapstructure:"APP_ENV"`
+	AppHost string `mapstructure:"APP_HOST"`
+	AppPort string `mapstructure:"APP_PORT"`
+
+	DBHost         string `mapstructure:"DB_HOST"`
+	DBPort         string `mapstructure:"DB_PORT"`
+	DBUser         string `mapstructure:"DB_USER"`
+	DBPass         string `mapstructure:"DB_PASS"`
+	DBName         string `mapstructure:"DB_NAME"`
+	DBMaxOpenConns string `mapstructure:"DB_MAX_OPEN_CONNS"`
+	DBMaxIdleConns string `mapstructure:"DB_MAX_IDLE_CONNS"`
+	// DBConnMaxLifetime time.Duration `mapstructure:"DB_CONN_MAX_LIFETIME"`
+
+	JWTSecret string `mapstructure:"JWT_SECRET"`
+	JWTExpire string `mapstructure:"JWT_EXPIRE"`
+}
+
+func LoadConfig(path string) (config Configuration, err error) {
+	viper.AddConfigPath(path)
+	viper.SetConfigName(".env")
+	viper.SetConfigType("env")
+
+	viper.AutomaticEnv()
+
+	if err = viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			log.Println("No .env file found, reading from OS environment variables instead")
+		} else {
+			log.Fatalf("Fatal error reading config: %s", err)
+		}
+	}
+
+	err = viper.Unmarshal(&config)
+
+	setupConfig(&config)
+
+	return config, nil
+}
+
+func setupConfig(config *Configuration) {
+	// Use OS environment variables if the .env is missing some values
+	if config.AppName == "" {
+		config.AppName = os.Getenv("APP_NAME")
+	}
+	if config.AppEnv == "" {
+		config.AppEnv = os.Getenv("APP_ENV")
+	}
+	if config.AppPort == "" {
+		config.AppPort = os.Getenv("APP_PORT")
+	}
+	if config.DBHost == "" {
+		config.DBHost = os.Getenv("DB_HOST")
+	}
+	if config.DBPort == "" {
+		config.DBPort = os.Getenv("DB_PORT")
+	}
+	if config.DBUser == "" {
+		config.DBUser = os.Getenv("DB_USER")
+	}
+	if config.DBPass == "" {
+		config.DBPass = os.Getenv("DB_PASS")
+	}
+	if config.DBName == "" {
+		config.DBName = os.Getenv("DB_NAME")
+	}
+
+	if config.DBMaxOpenConns == "" {
+		config.DBMaxOpenConns = os.Getenv("DB_MAX_OPEN_CONNS")
+	}
+
+	if config.DBMaxIdleConns == "" {
+		config.DBMaxIdleConns = os.Getenv("DB_MAX_IDLE_CONNS")
+	}
+
+	if config.JWTSecret == "" {
+		config.JWTSecret = os.Getenv("JWT_SECRET")
+	}
+
+	if config.JWTExpire == "" {
+		config.JWTExpire = os.Getenv("JWT_EXPIRE")
+	}
+}

pkg/logger/logger.go

@@ -0,0 +1 @@
+package logger

pkg/webutils/pagination.go

@@ -0,0 +1 @@
+package webutils

pkg/webutils/response.go

@@ -0,0 +1 @@
+package webutils