package util

import (
	"flag"
	"os"
	"strings"

	"git.mstar.dev/mstar/goutils/sliceutils"
)

func LoadFileFromArgs() []byte {
	if !flag.Parsed() {
		flag.Parse()
	}
	data, err := os.ReadFile(flag.CommandLine.Arg(0))
	if err != nil {
		panic(err)
	}
	return data
}

func AbsI(a int) int {
	if a > 0 {
		return a
	} else {
		return -a
	}
}

func FileContentToNonEmptyLines(data []byte) []string {
	return sliceutils.Filter(
		strings.Split(string(data), "\n"),
		func(t string) bool { return len(t) > 0 },
	)
}