model/resolution.go

package model

import (
	"fmt"
	"strconv"
	"strings"
)

type Resolution int

const (
	Resolution4K     Resolution = 2160
	ResolutionQuadHD Resolution = 1440
	ResolutionFullHD Resolution = 1080
	ResolutionHD     Resolution = 720
	ResolutionSD     Resolution = 480

	ResolutionUnknown Resolution = 0
)

func ParseResolution(str string) (Resolution, error) {
	switch strings.TrimSpace(str) {
	case "4K":
		return Resolution4K, nil
	case "HD":
		return ResolutionHD, nil
	case "SD":
		return ResolutionSD, nil
	default:
		v, err := strconv.Atoi(strings.TrimSuffix(str, "p"))
		return Resolution(v), err
	}
}

func (r Resolution) String() string {
	switch r {
	case Resolution4K:
		return "4K"
	default:
		return fmt.Sprintf("%dp", r)
	}
}