fix body of deprectaed sign response (#12)

Author: celuchmarek

service/src/main/java/digital/slovensko/autogram/service/dto/DeprecatedSignedDocumentResponse.java

@@ -1,25 +1,14 @@
 package digital.slovensko.autogram.service.dto;
 
-import digital.slovensko.autogram.core.errors.UnrecognizedException;
 import digital.slovensko.autogram.core.server.dto.Document;
 import eu.europa.esig.dss.model.DSSDocument;
 
-import java.io.IOException;
-import java.util.Base64;
-
 public record DeprecatedSignedDocumentResponse(Document documentResponse, Signer signer) {
-        public static DeprecatedSignedDocumentResponse buildFormDSS(DSSDocument document, String signedBy, String issuedBy) {
-        try (var stream = document.openStream()) {
-            return new DeprecatedSignedDocumentResponse(
-                    new Document(
-                        Base64.getEncoder().encodeToString(stream.readAllBytes()),
-                        document.getMimeType().getMimeTypeString() + ";base64",
-                        document.getName()),
-                    new Signer(signedBy, issuedBy)
-            );
-        } catch (IOException e) {
-            throw new UnrecognizedException(e);
-        }
+    public static DeprecatedSignedDocumentResponse buildFormDSS(DSSDocument document, String signedBy, String issuedBy) {
+        return new DeprecatedSignedDocumentResponse(
+                (Document) Document.buildFromDSS(document),
+                new Signer(signedBy, issuedBy)
+        );
     }
 }