feat: page content

internal/components/page/html.go

@@ -0,0 +1,69 @@
+package page
+
+import (
+	"context"
+	"io"
+	"log/slog"
+	"net/url"
+	"strings"
+
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/components/images"
+	"github.com/gomarkdown/markdown"
+	"github.com/gomarkdown/markdown/ast"
+	"github.com/gomarkdown/markdown/html"
+	"github.com/gomarkdown/markdown/parser"
+)
+
+func (s *Service) getHTML(ctx context.Context, page PageHeader) (out []byte, err error) {
+	extensions := parser.CommonExtensions | parser.AutoHeadingIDs | parser.NoEmptyLineBeforeBlock
+	p := parser.NewWithExtensions(extensions)
+
+	doc := p.Parse(page.md)
+
+	// create HTML renderer with extensions
+	htmlFlags := html.CommonFlags | html.HrefTargetBlank
+	opts := html.RendererOptions{
+		Flags:          htmlFlags,
+		RenderNodeHook: imageMiddleware(page),
+	}
+	renderer := html.NewRenderer(opts)
+
+	out = markdown.Render(doc, renderer)
+	return
+}
+
+func imageMiddleware(page PageHeader) func(w io.Writer, node ast.Node, entering bool) (ast.WalkStatus, bool) {
+	return func(w io.Writer, node ast.Node, entering bool) (ast.WalkStatus, bool) {
+		if !entering {
+			return ast.GoToNext, false
+		}
+		img, ok := node.(*ast.Image)
+		if !ok {
+			return ast.GoToNext, false
+		}
+		src := string(img.Destination)
+		if strings.HasPrefix(src, ".attachments") {
+			imgPath, err := url.PathUnescape(src)
+			if err != nil {
+				slog.Error("could not unescape path", "err", err)
+				return ast.GoToNext, false
+			}
+			src, err = images.URLFromPath(page.UID + "/" + imgPath)
+			if err != nil {
+				slog.Error("could not get image url", "err", err)
+				return ast.GoToNext, false
+			}
+
+			img.Attribute = &ast.Attribute{Attrs: map[string][]byte{
+				"srcset": []byte(images.SourceSet(src)),
+				"src":    []byte(src),
+			}}
+			// // img.Attrs["srcset"] =
+
+		}
+
+		img.Destination = []byte(src)
+
+		return ast.GoToNext, false
+	}
+}