95 lines
2.0 KiB
Go
95 lines
2.0 KiB
Go
package page
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import (
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"bytes"
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"compress/flate"
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"context"
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"encoding/base64"
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"errors"
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"fmt"
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"log/slog"
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"regexp"
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"strings"
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"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/components/images"
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"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/components/translate"
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"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/filesystem"
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"github.com/studio-b12/gowebdav"
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)
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var titleRGX = regexp.MustCompile(`(?m)^#\s+(.+)$`)
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var (
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ErrMalFormedInput = errors.New("mal formed input")
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ErrNotFound = errors.New("not found")
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)
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func (s *Service) getPageHeaders(ctx context.Context, uid string) (page PageHeader, err error) {
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info, err := s.fs.ReadDir(uid)
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if gowebdav.IsErrNotFound(err) { // try private
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err = ErrNotFound
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}
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if err != nil {
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return
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}
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lang := translate.Language(ctx)
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var coverImage filesystem.FileInfo
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var contentMD filesystem.FileInfo
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for _, f := range info {
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file, ok := f.(filesystem.FileInfo)
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if !ok {
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continue
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}
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if strings.HasPrefix(file.ContentType(), "image/") {
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coverImage = file
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}
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parts := strings.Split(file.Name(), ".")
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// fallback content
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if contentMD == nil && len(parts) == 2 && parts[1] == "md" {
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contentMD = file
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}
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// language content
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if len(parts) == 3 && parts[1] == lang && parts[2] == "md" {
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contentMD = file
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}
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}
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slog.Debug("loaded page infos", "cover", coverImage, "content", contentMD)
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content, err := s.fs.Read(contentMD.Path())
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if err != nil {
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return
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}
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title := titleRGX.FindStringSubmatch(string(content))
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if len(title) < 2 {
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err = fmt.Errorf("%w: no matches for title", ErrMalFormedInput)
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return
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}
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page.UID = uid
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page.Title = title[1]
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if coverImage != nil {
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page.CoverImageUID, err = images.UIDFromPath(coverImage.Path())
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}
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return
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}
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func getImageUID(path string) string {
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var b bytes.Buffer
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// NewWriter with NoDict (nil) creates a raw DEFLATE compressor
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zw, _ := flate.NewWriter(&b, flate.BestCompression)
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zw.Write([]byte(path))
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zw.Close() // Essential to flush the final bits
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return base64.RawURLEncoding.EncodeToString(b.Bytes())
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}
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