GoToSocial/internal/text/markdown.go

/*
   GoToSocial
   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package text

import (
	"github.com/russross/blackfriday/v2"
	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)

var bfExtensions = blackfriday.NoIntraEmphasis |
	blackfriday.FencedCode |
	blackfriday.Autolink |
	blackfriday.Strikethrough |
	blackfriday.SpaceHeadings |
	blackfriday.BackslashLineBreak

func (f *formatter) FromMarkdown(md string, mentions []*gtsmodel.Mention, tags []*gtsmodel.Tag) string {
	content := preformat(md)

	// do the markdown parsing *first*
	content = string(blackfriday.Run([]byte(content), blackfriday.WithExtensions(bfExtensions)))

	// format tags nicely
	content = f.ReplaceTags(content, tags)

	// format mentions nicely
	content = f.ReplaceMentions(content, mentions)

	return postformat(content)
}