67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
package zim
|
|
|
|
import "github.com/pkg/errors"
|
|
|
|
func (r *Reader) Favicon() (*ContentEntry, error) {
|
|
illustration, err := r.getMetadataIllustration()
|
|
if err != nil && !errors.Is(err, ErrNotFound) {
|
|
return nil, errors.WithStack(err)
|
|
}
|
|
|
|
if illustration != nil {
|
|
return illustration, nil
|
|
}
|
|
|
|
namespaces := []Namespace{V5NamespaceLayout, V5NamespaceImageFile}
|
|
urls := []string{"favicon", "favicon.png"}
|
|
|
|
for _, ns := range namespaces {
|
|
for _, url := range urls {
|
|
entry, err := r.EntryWithURL(ns, url)
|
|
if err != nil && !errors.Is(err, ErrNotFound) {
|
|
return nil, errors.WithStack(err)
|
|
}
|
|
|
|
if errors.Is(err, ErrNotFound) {
|
|
continue
|
|
}
|
|
|
|
content, err := entry.Redirect()
|
|
if err != nil {
|
|
return nil, errors.WithStack(err)
|
|
}
|
|
|
|
return content, nil
|
|
}
|
|
}
|
|
|
|
return nil, errors.WithStack(ErrNotFound)
|
|
}
|
|
|
|
func (r *Reader) getMetadataIllustration() (*ContentEntry, error) {
|
|
keys := []MetadataKey{MetadataIllustration96x96at2, MetadataIllustration48x48at1}
|
|
|
|
metadata, err := r.Metadata(keys...)
|
|
if err != nil {
|
|
return nil, errors.WithStack(err)
|
|
}
|
|
|
|
for _, k := range keys {
|
|
if _, exists := metadata[k]; exists {
|
|
entry, err := r.EntryWithURL(V5NamespaceMetadata, string(k))
|
|
if err != nil {
|
|
return nil, errors.WithStack(err)
|
|
}
|
|
|
|
content, err := entry.Redirect()
|
|
if err != nil {
|
|
return nil, errors.WithStack(err)
|
|
}
|
|
|
|
return content, nil
|
|
}
|
|
}
|
|
|
|
return nil, errors.WithStack(ErrNotFound)
|
|
}
|