package config

import (
	"io"
	"os"
)

// A method of extracting input from the user.
type Source interface {
	// Fetch data from this source.
	Extract() (string, error)
}

// A source defined by a string.
type StringSource struct{ Data string }

func (s StringSource) Extract() (string, error) { return s.Data, nil }

// A source pulling from standard input.
type StdinSource struct{}

func (s StdinSource) Extract() (string, error) {
	data, err := io.ReadAll(os.Stdin)
	if err != nil {
		return "", err
	}

	return string(data), nil
}