package utio

import (
	"os"
)

// DecodeFile tries to open the file at the specified path and if successful it decodes d.
func DecodeFile(path string, d Decoder) error {
	return ReadFile(path, d.Decode)
}

// ReadFile tries to open the file at the specified path and if successful it invokes fn.
func ReadFile(path string, fn ReadFunc) error {
	var f, err = os.Open(path)
	if nil != err {
		return err
	}
	defer f.Close()
	return fn(f)
}

// EncodeFile tries to open the file at the specified path and if successful it encodes e.
func EncodeFile(path string, e Encoder) error {
	return WriteFile(path, e.Encode)
}

// WriteFile tries to create the file at the specified path and if successful it invokes fn.
func WriteFile(path string, fn WriteFunc) error {
	var f, err = os.Create(path)
	if nil != err {
		return err
	}
	defer f.Close()
	return fn(f)
}