resolved_image_saver.go RawHistoryFolder

1package webkit
2
3import (
4	"context"
5	"fmt"
6	"os"
7	"path/filepath"
8
9	"github.com/bnema/dumber/internal/application/port"
10	"github.com/bnema/dumber/internal/domain/entity"
11)
12
13const (
14	resolvedImageDirPerm  = 0o755
15	resolvedImageFilePerm = 0o644
16)
17
18// ResolvedImageSaver prepares a download destination and writes resolved image bytes to disk.
19type ResolvedImageSaver struct {
20	preparer    port.DownloadPreparer
21	downloadDir string
22}
23
24// NewResolvedImageSaver creates a new ResolvedImageSaver helper.
25func NewResolvedImageSaver(preparer port.DownloadPreparer, downloadDir string) *ResolvedImageSaver {
26	return &ResolvedImageSaver{
27		preparer:    preparer,
28		downloadDir: downloadDir,
29	}
30}
31
32// SaveResolvedImage resolves a destination path and writes the image bytes.
33func (s *ResolvedImageSaver) SaveResolvedImage(ctx context.Context, image entity.ImageData, menuContext port.MenuContext) error {
34	if s == nil || s.preparer == nil {
35		return fmt.Errorf("resolved image saver: download preparer not available")
36	}
37	if len(image.Bytes) == 0 {
38		return fmt.Errorf("resolved image saver: empty image data")
39	}
40
41	output := s.preparer.Execute(ctx, port.DownloadPrepareInput{
42		DownloadDir: s.downloadDir,
43		// Leave SuggestedFilename empty so DownloadPreparer can fall back to
44		// URI-derived naming when no explicit filename is available.
45		Response: downloadResponse{
46			mimeType: image.MimeType,
47			uri:      menuContext.ImageURI,
48		},
49	})
50	if output == nil || output.DestinationPath == "" {
51		return fmt.Errorf("resolved image saver: destination path not prepared")
52	}
53
54	if err := os.MkdirAll(filepath.Dir(output.DestinationPath), resolvedImageDirPerm); err != nil {
55		return err
56	}
57	if err := os.WriteFile(output.DestinationPath, image.Bytes, resolvedImageFilePerm); err != nil {
58		return err
59	}
60	return nil
61}
62
63type downloadResponse struct {
64	mimeType          string
65	suggestedFilename string
66	uri               string
67}
68
69func (r downloadResponse) GetMimeType() string          { return r.mimeType }
70func (r downloadResponse) GetSuggestedFilename() string { return r.suggestedFilename }
71func (r downloadResponse) GetUri() string               { return r.uri }