82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
package zim
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import (
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"io"
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"github.com/pkg/errors"
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)
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type MetadataKey string
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// See https://wiki.openzim.org/wiki/Metadata
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const (
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MetadataName MetadataKey = "Name"
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MetadataTitle MetadataKey = "Title"
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MetadataDescription MetadataKey = "Description"
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MetadataLongDescription MetadataKey = "LongDescription"
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MetadataCreator MetadataKey = "Creator"
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MetadataTags MetadataKey = "Tags"
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MetadataDate MetadataKey = "Date"
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MetadataPublisher MetadataKey = "Publisher"
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MetadataFlavour MetadataKey = "Flavour"
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MetadataSource MetadataKey = "Source"
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MetadataLanguage MetadataKey = "Language"
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MetadataIllustration48x48at1 MetadataKey = "Illustration_48x48@1"
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MetadataIllustration96x96at2 MetadataKey = "Illustration_96x96@2"
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)
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var knownKeys = []MetadataKey{
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MetadataName,
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MetadataTitle,
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MetadataDescription,
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MetadataLongDescription,
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MetadataCreator,
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MetadataPublisher,
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MetadataLanguage,
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MetadataTags,
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MetadataDate,
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MetadataFlavour,
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MetadataSource,
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MetadataIllustration48x48at1,
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MetadataIllustration96x96at2,
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}
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// Metadata returns a copy of the internal metadata map of the ZIM file.
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func (r *Reader) Metadata(keys ...MetadataKey) (map[MetadataKey]string, error) {
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if len(keys) == 0 {
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keys = knownKeys
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}
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metadata := make(map[MetadataKey]string)
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for _, key := range keys {
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entry, err := r.EntryWithURL(V5NamespaceMetadata, string(key))
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if err != nil {
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if errors.Is(err, ErrNotFound) {
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continue
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}
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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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reader, err := content.Reader()
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if err != nil {
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return nil, errors.WithStack(err)
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}
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data, err := io.ReadAll(reader)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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metadata[key] = string(data)
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}
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return metadata, nil
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}
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