main.go

package main

import (
	"log"
	"os"
	"strings"
	"time"

	"github.com/prgres/img2asci/pkg/img2asci"
	"github.com/urfave/cli/v2"
)

func main() {
	flags := []cli.Flag{
		&cli.IntFlag{
			Name:    "width",
			Aliases: []string{"wx"},
			Value:   80,
			Usage:   "width of output image ",
		},
		&cli.IntFlag{
			Name:    "height",
			Aliases: []string{"hx"},
			Value:   0,
			Usage:   "width of output image",
		},
		&cli.Float64Flag{
			Name:    "sharp",
			Aliases: []string{"vs"},
			Value:   img2asci.DeafultSharp,
			Usage:   "preprocessing sharpening value",
		},
		&cli.Float64Flag{
			Name:    "bright",
			Aliases: []string{"vb"},
			Value:   img2asci.DeafultBright,
			Usage:   "preprocessing bright value",
		},
		&cli.Float64Flag{
			Name:    "contrast",
			Aliases: []string{"vc"},
			Value:   img2asci.DeafultContrast,
			Usage:   "preprocessing contrast value",
		},
		&cli.StringFlag{
			Name:    "outputFilePath",
			Aliases: []string{"o"},
			Value:   "./output.txt",
			Usage:   "name of output file",
		},
		&cli.StringFlag{
			Name:  "grayScaleAsciTable",
			Value: img2asci.DeafultGrayScale,
			Usage: "override gray scale with ASCI characters",
		},
		&cli.BoolFlag{
			Name:    "term",
			Aliases: []string{"t"},
			Value:   false,
			Usage:   "if print to term",
		},
	}

	app := &cli.App{
		EnableBashCompletion: true,
		Name:                 "img2asci",
		Usage:                "ASCI ART converter",
		Description:          "Simple but yet very powerfull converter from ordinary, plain images to beatiful ASCI art",
		Flags:                flags,
		Compiled:             time.Now(),
		Authors: []*cli.Author{
			{
				Name: "M. Więcek",
			},
		},
		Action: func(c *cli.Context) error {
			if c.NArg() == 0 {
				return cli.ShowAppHelp(c)
			}

			inputFile := strings.TrimSpace(c.Args().First())
			outputFile := c.String("outputFilePath")

			img := &img2asci.Config{
				Term: c.Bool("term"),
				ProcessingValues: &img2asci.ProcessingValues{
					Width:              c.Int("width"),
					Height:             c.Int("height"),
					Sharp:              c.Float64("sharp"),
					Bright:             c.Float64("bright"),
					Contrast:           c.Float64("contrast"),
					GrayScaleAsciTable: c.String("grayScaleAsciTable"),
				},
			}

			return img.Process(inputFile, outputFile)
		},
	}

	if err := app.Run(os.Args); err != nil {
		log.Fatal(err)
	}
}