package main

import (
	"github.com/microcosm-cc/bluemonday"
	"github.com/russross/blackfriday"
	"io/ioutil"
	"os"
)

func main() {
	const (
		flags = 0 |
			blackfriday.HTML_USE_XHTML |
			blackfriday.HTML_USE_SMARTYPANTS |
			blackfriday.HTML_SMARTYPANTS_FRACTIONS |
			blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
		extensions = 0 |
			blackfriday.EXTENSION_NO_INTRA_EMPHASIS |
			blackfriday.EXTENSION_TABLES |
			blackfriday.EXTENSION_FENCED_CODE |
			blackfriday.EXTENSION_AUTOLINK |
			blackfriday.EXTENSION_STRIKETHROUGH |
			blackfriday.EXTENSION_SPACE_HEADERS |
			blackfriday.EXTENSION_HARD_LINE_BREAK |
			blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
	)
	renderer := blackfriday.HtmlRenderer(flags, "", "")
	input, _ := ioutil.ReadAll(os.Stdin)
	unsafe := blackfriday.Markdown(input, renderer, extensions)
	safe := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
	out := os.Stdout
	out.Write(safe)
}