func lookupTagNames(store *storage.Storage, fileTags entities.FileTags) ([]string, error) {
tagNames := make([]string, 0, len(fileTags))
for _, fileTag := range fileTags {
tag, err := store.Tag(fileTag.TagId)
if err != nil {
return nil, fmt.Errorf("could not lookup tag: %v", err)
}
if tag == nil {
return nil, fmt.Errorf("tag '%v' does not exist", fileTag.TagId)
}
var tagName string
if fileTag.ValueId == 0 {
tagName = tag.Name
} else {
value, err := store.Value(fileTag.ValueId)
if err != nil {
return nil, fmt.Errorf("could not lookup value: %v", err)
}
if value == nil {
return nil, fmt.Errorf("value '%v' does not exist", fileTag.ValueId)
}
tagName = tag.Name + "=" + value.Name
}
tagNames = append(tagNames, tagName)
}
sort.Strings(tagNames)
return tagNames, nil
}