gotosocial/internal/text/markdown.go

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/*
GoToSocial
2021-12-20 18:42:19 +01:00
Copyright (C) 2021-2022 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 (
"context"
"github.com/russross/blackfriday/v2"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/tdewolff/minify/v2"
"github.com/tdewolff/minify/v2/html"
)
var m *minify.M
func (f *formatter) FromMarkdown(ctx context.Context, md string, mentions []*gtsmodel.Mention, tags []*gtsmodel.Tag) string {
// format tags nicely
content := f.ReplaceTags(ctx, md, tags)
// format mentions nicely
content = f.ReplaceMentions(ctx, content, mentions)
// parse markdown
contentBytes := blackfriday.Run([]byte(content))
// clean anything dangerous out of it
content = SanitizeHTML(string(contentBytes))
if m == nil {
m = minify.New()
m.Add("text/html", &html.Minifier{
KeepEndTags: true,
KeepQuotes: true,
KeepWhitespace: true,
})
}
minified, err := m.String("text/html", content)
if err != nil {
log.Errorf("error minifying markdown text: %s", err)
}
return minified
}