Add object for model and core module

model/lib/extensions/list_email_address_extension.dart

@@ -0,0 +1,24 @@
+import 'package:jmap_dart_client/jmap/mail/email/email_address.dart';
+import 'package:model/mailbox/expand_mode.dart';
+import 'package:model/extensions/email_address_extension.dart';
+
+extension ListEmailAddressExtension on Set<EmailAddress>? {
+
+  List<String> getListEmailAddress({ExpandMode expandMode = ExpandMode.EXPAND, int limitAddress = 1}) {
+    if (this != null) {
+      if (expandMode == ExpandMode.EXPAND) {
+        return this!.map((emailAddress) => emailAddress.asString()).toList();
+      } else {
+        final address = this!.map((emailAddress) => emailAddress.asString()).toList();
+        return address.length > limitAddress ? address.sublist(0, limitAddress) : address;
+      }
+    }
+    return [];
+  }
+
+  String listEmailAddressToString({ExpandMode expandMode = ExpandMode.EXPAND, int limitAddress = 1}) {
+    return getListEmailAddress(expandMode: expandMode, limitAddress: limitAddress).join(', ');
+  }
+
+  int numberEmailAddress() => this != null ? this!.length : 0;
+}

model/lib/extensions/session_extension.dart

@@ -0,0 +1,16 @@
+
+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+import 'package:uri/uri.dart';
+
+extension SessionExtension on Session {
+
+  String getDownloadUrl(String accountId, String blobId, String name, String type) {
+    final downloadUriTemplate = UriTemplate('${downloadUrl.origin}');
+    return downloadUriTemplate.expand({
+      'accountId' : '$accountId',
+      'blobId' : '$blobId',
+      'name' : '$name',
+      'type' : '$type',
+    });
+  }
+}