TF-1812 Handle store sending email to hive cache

(cherry picked from commit c6f46fbce372a2ad0fae83ab4b9ef8dca6167e1a)

lib/features/offline_mode/manager/sending_email_cache_manager.dart

@@ -0,0 +1,25 @@
+
+import 'package:core/utils/app_logger.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/core/user_name.dart';
+import 'package:model/extensions/account_id_extensions.dart';
+import 'package:tmail_ui_user/features/caching/clients/sending_email_hive_cache_client.dart';
+import 'package:tmail_ui_user/features/caching/utils/cache_utils.dart';
+import 'package:tmail_ui_user/features/offline_mode/model/sending_email_hive_cache.dart';
+
+class SendingEmailCacheManager {
+
+  final SendingEmailHiveCacheClient _hiveCacheClient;
+
+  SendingEmailCacheManager(this._hiveCacheClient);
+
+  Future<void> storeSendingEmail(
+    AccountId accountId,
+    UserName userName,
+    SendingEmailHiveCache sendingEmailHiveCache
+  ) {
+    final keyCache = TupleKey(sendingEmailHiveCache.sendingId, accountId.asString, userName.value).encodeKey;
+    log('SendingEmailCacheManager::storeSendingEmail():keyCache: $keyCache | sendingEmailHiveCache: $sendingEmailHiveCache');
+    return _hiveCacheClient.insertItem(keyCache, sendingEmailHiveCache);
+  }
+}