ui/ui.go

package ui

import (
	"fmt"
	"io"
	"os"
    "strings"
)

var stdOutput io.Writer
var verboseOutput io.Writer

func init() {
    isQuiet := detectFlag("q", "--quiet")
    isVerbose := detectFlag("V", "--verbose")

	SetupOutputMode(isQuiet, isVerbose)
}

func detectFlag(shortFlag string, fullFlag string) bool {
    for _, arg := range os.Args {
        if containFlag(arg, shortFlag) || arg == fullFlag {
            return true
        } 
    }
    return false
}

func containFlag(arg string, shortFlag string) bool {
    if len(arg)>1 {
        if arg[0] == "-"[0] && arg[1] != "-"[0] {
            return strings.Contains(arg, shortFlag)
        }
    }
    return false
}

func SetupOutputMode(isQuiet bool, isVerbose bool) {
	if isQuiet {
		stdOutput = io.Discard
		verboseOutput = io.Discard
        return
	}

	if isVerbose {
        stdOutput = os.Stdout
		verboseOutput = os.Stdout
        return
	}

    stdOutput = os.Stdout
    verboseOutput = io.Discard
}

func PrintOut(a ...any) (n int, err error) {
	n, err = fmt.Fprintln(stdOutput, a...)
	return
}

func PrintVerbose(a ...any) (n int, err error) {
	n, err = fmt.Fprintln(verboseOutput, a...)
	return
}