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