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package mix
import (
"errors"
"fmt"
objectid "codeberg.org/lindenii/furgit/object/id"
"codeberg.org/lindenii/furgit/objectstore"
objecttype "codeberg.org/lindenii/furgit/object/type"
)
// ReadHeader reads object header data from one backend that has it.
func (mix *Mix) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
for i, backend := 0, mix.firstBackend(); backend != nil; i, backend = i+1, mix.nextBackend(backend) {
ty, size, err := backend.ReadHeader(id)
if err == nil {
mix.touchBackend(backend)
return ty, size, nil
}
if errors.Is(err, objectstore.ErrObjectNotFound) {
continue
}
return objecttype.TypeInvalid, 0, fmt.Errorf("objectstore: backend %d read header: %w", i, err)
}
return objecttype.TypeInvalid, 0, objectstore.ErrObjectNotFound
}
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