TF-3792 Fix cannot reply to email on Stalwart server

Signed-off-by: dab246 <tdvu@linagora.com>

model/lib/extensions/email_body_part_extension.dart

@@ -11,4 +11,19 @@ extension EmailBodyPartExtension on EmailBodyPart {
     cid: cid,
     charset: charset,
     disposition: disposition.toContentDisposition());
+
+  EmailBodyPart onlyUseBlobIdOrPartId() => EmailBodyPart(
+    partId: blobId == null ? partId : null,
+    blobId: blobId,
+    size: size,
+    name: name,
+    type: type,
+    cid: cid,
+    charset: charset,
+    disposition: disposition,
+    headers: headers,
+    language: language,
+    location: location,
+    subParts: subParts,
+  );
 }

model/lib/extensions/set_email_body_part_extension.dart

@@ -0,0 +1,7 @@
+import 'package:jmap_dart_client/jmap/mail/email/email_body_part.dart';
+import 'package:model/extensions/email_body_part_extension.dart';
+
+extension SetEmailBodyPartExtension on Set<EmailBodyPart> {
+  Set<EmailBodyPart> onlyUseBlobIdOrPartId() =>
+      map((emailBodyPart) => emailBodyPart.onlyUseBlobIdOrPartId()).toSet();
+}

model/lib/model.dart

@@ -61,6 +61,7 @@ export 'extensions/session_extension.dart';
 export 'extensions/utc_date_extension.dart';
 export 'extensions/contact_support_capability_extension.dart';
 export 'extensions/list_id_extension.dart';
+export 'extensions/set_email_body_part_extension.dart';
 // Identity
 export 'identity/identity_request_dto.dart';
 export 'mailbox/expand_mode.dart';