package core

import (
	"crypto/sha256"
	"io"
	"os"
)

// Panic if e contains an error
func Check(e error) {
	if e != nil {
		panic("Check: A fatal error occured during execution -> " + e.Error())
	}
}

// Returns true if files correspond
func CompareFiles(file1 File, file2 File) bool {
	return file1.Metadata.Hash == file2.Metadata.Hash
}

// Gets the sha256 hash of a file's content
func GetHash(file File) ([]byte, error) {
	// init
	hasher := sha256.New()
	file_path := "" //TODO: missing
	// Open file
	f, err := os.Open(file_path)
	if err != nil { // Path error
		return nil, err
	}
	// Compute hash
	io.Copy(hasher, f)
	sum := hasher.Sum(nil)

	return sum, nil
}