// Copyright (C) 2021 Marius Schellenberger

package db

import (
	"crypto/sha256"
	"regexp"
)

var nameRe = regexp.MustCompile("[^a-zA-Z0-9]+")

// Parts taken from strings.TrimPrefix
func hasTrimPrefix(s, prefix string) (string, bool) {
	if len(s) >= len(prefix) && s[0:len(prefix)] == prefix {
		return s[len(prefix):], true
	}
	return s, false
}

func validatePassword(pw string) (b []byte) {
	b = []byte(pw)
	if len(pw) <= 56 {
		return
	}
	hash := sha256.New()
	hash.Write(b)
	b = hash.Sum(nil)
	return
}

func eq(a, b []string) bool {
	if len(a) != len(b) {
		return false
	}
	for i, v := range a {
		if v != b[i] {
			return false
		}
	}
	return true
}