package helper

import (
	"github.com/flosch/pongo2"
	_ "github.com/flosch/pongo2-addons"
	"gopkg.in/russross/blackfriday.v2"
)

func init() {
	pongo2.ReplaceFilter("markdown", MarkdownFilter)
}

// MarkdownFilter is a pongo2 filter, which converts markdown to html
func MarkdownFilter(in *pongo2.Value, param *pongo2.Value) (*pongo2.Value, *pongo2.Error) {
	html := blackfriday.Run([]byte(in.String()))
	return pongo2.AsSafeValue(string(html)), nil
}