opengist/internal/render/markdown.go

package render

import (
	"bytes"
	"github.com/alecthomas/chroma/v2/formatters/html"
	"github.com/thomiceli/opengist/internal/db"
	"github.com/thomiceli/opengist/internal/git"
	"github.com/yuin/goldmark"
	emoji "github.com/yuin/goldmark-emoji"
	highlighting "github.com/yuin/goldmark-highlighting/v2"
	"github.com/yuin/goldmark/extension"
	"go.abhg.dev/goldmark/mermaid"
)

func MarkdownGistPreview(gist *db.Gist) (RenderedGist, error) {
	var buf bytes.Buffer
	err := newMarkdown().Convert([]byte(gist.Preview), &buf)

	return RenderedGist{
		Gist: gist,
		HTML: buf.String(),
	}, err
}

func MarkdownFile(file *git.File) (RenderedFile, error) {
	var buf bytes.Buffer
	err := newMarkdown().Convert([]byte(file.Content), &buf)

	return RenderedFile{
		File: file,
		HTML: buf.String(),
		Type: "Markdown",
	}, err
}

func newMarkdown() goldmark.Markdown {
	return goldmark.New(
		goldmark.WithExtensions(
			extension.GFM,
			highlighting.NewHighlighting(
				highlighting.WithStyle("catppuccin-latte"),
				highlighting.WithFormatOptions(html.WithClasses(true))),
			emoji.Emoji,
			&mermaid.Extender{},
		),
	)
}