Add public artifact reader support

artifact_reader.go

@@ -0,0 +1,39 @@
+package scriptorium
+
+import (
+	"context"
+	"errors"
+
+	artifactadapter "gitea.maximumdirect.net/eric/scriptorium/internal/artifact"
+	"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
+)
+
+var errNilArtifactReaderResponse = errors.New("artifact reader returned nil artifact without error")
+
+type publicArtifactReaderAdapter struct {
+	reader ArtifactReader
+}
+
+var _ artifactadapter.Reader = publicArtifactReaderAdapter{}
+
+func (a publicArtifactReaderAdapter) Read(ctx context.Context, ref domain.ArtifactRef) (*domain.Artifact, error) {
+	artifact, err := a.reader.Read(ctx, ArtifactRef{
+		Type: ArtifactRefType(ref.Type),
+		URI:  ref.URI,
+		Body: ref.Body,
+	})
+	if err != nil {
+		return nil, err
+	}
+	if artifact == nil {
+		return nil, errNilArtifactReaderResponse
+	}
+	return &domain.Artifact{
+		Name:        artifact.Name,
+		ContentType: artifact.ContentType,
+		Body:        copyBytes(artifact.Body),
+		URI:         artifact.URI,
+		Size:        artifact.Size,
+		Hash:        artifact.Hash,
+	}, nil
+}