memnix / memnix-rest

package env

import "os"

// IEnv is an interface for environment variables

type IEnv interface {

	GetEnv(key string) string // GetEnv returns the value of the environment variable named by the key.

}

// Env is a struct for environment variables

type Env struct {

	env IEnv // env is an interface for environment variables

}

// NewMyEnv returns a new Env struct

func NewMyEnv(env IEnv) *Env {

	return &Env{env: env}

}

// GetEnv returns the value of the environment variable named by the key.

func (m *Env) GetEnv(key string) string {

	return m.env.GetEnv(key)

}

// FakeEnv is a struct for fake environment variables

type FakeEnv struct{}

// GetEnv returns the value of the environment variable named by the key.

// It returns predefined value for testing.

func (*FakeEnv) GetEnv(key string) string {

	fakeEnv := map[string]string{

		"APP_ENV":    "dev",    // development

		"SECRET_KEY": "secret", // secret key

	}

	// return predefined value for existing key

	if val, ok := fakeEnv[key]; ok {

		return val

	}

	// return empty string for non-existing key

	return ""

}

// OsEnv is a struct for os environment variables

type OsEnv struct{}

// GetEnv returns the value of the environment variable named by the key.

func (*OsEnv) GetEnv(key string) string {

	return os.Getenv(key) // return os environment variable

}