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package chain
import (
"errors"
"fmt"
objectid "codeberg.org/lindenii/furgit/object/id"
objectstorer "codeberg.org/lindenii/furgit/object/storer"
objecttype "codeberg.org/lindenii/furgit/object/type"
)
// ReadHeader reads object header data from the first backend that has it.
func (chain *Chain) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
for i, backend := range chain.backends {
ty, size, err := backend.ReadHeader(id)
if err == nil {
return ty, size, nil
}
if errors.Is(err, objectstorer.ErrObjectNotFound) {
continue
}
return objecttype.TypeInvalid, 0, fmt.Errorf("objectstorer: backend %d read header: %w", i, err)
}
return objecttype.TypeInvalid, 0, objectstorer.ErrObjectNotFound
}
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