package credentials

import "errors"

// Credentials holds the information shared between docker and the credentials store.
type Credentials struct {
	ServerURL string
	Username  string
	Secret    string
}

// Helper is the interface a credentials store helper must implement.
type Helper interface {
	// Add appends credentials to the store.
	Add(*Credentials) error
	// Delete removes credentials from the store.
	Delete(serverURL string) error
	// Get retrieves credentials from the store.
	// It returns username and secret as strings.
	Get(serverURL string) (string, string, error)
}

// ErrCredentialsNotFound standarizes the not found error, so every helper returns
// the same message and docker can handle it properly.
var ErrCredentialsNotFound = errors.New("credentials not found in native keychain")