TF-1810 Add hive cache object for detailed email

(cherry picked from commit 0a8b2838205586c76e749d6b02496d22107726f4)

lib/features/caching/utils/caching_constants.dart

@@ -14,6 +14,9 @@ class CachingConstants {
   static const int RECENT_LOGIN_URL_HIVE_CACHE_IDENTITY = 12;
   static const int RECENT_LOGIN_USERNAME_HIVE_CACHE_IDENTITY = 13;
   static const int FCM_SUBSCRIPTION_HIVE_CACHE_IDENTITY = 14;
+  static const int ATTACHMENT_HIVE_CACHE_ID = 15;
+  static const int EMAIL_HEADER_HIVE_CACHE_ID = 16;
+  static const int DETAILED_EMAIL_HIVE_CACHE_ID = 17;
 
   static const String fcmCacheBoxName = 'fcm_cache_box';
 }

lib/features/offline_mode/model/attachment_hive_cache.dart

@@ -0,0 +1,52 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:hive/hive.dart';
+import 'package:tmail_ui_user/features/caching/utils/caching_constants.dart';
+
+part 'attachment_hive_cache.g.dart';
+
+@HiveType(typeId: CachingConstants.ATTACHMENT_HIVE_CACHE_ID)
+class AttachmentHiveCache extends HiveObject with EquatableMixin {
+
+  @HiveField(0)
+  final String? partId;
+
+  @HiveField(1)
+  final String? blobId;
+
+  @HiveField(2)
+  final int? size;
+
+  @HiveField(3)
+  final String? name;
+
+  @HiveField(4)
+  final String? type;
+
+  @HiveField(5)
+  final String? cid;
+
+  @HiveField(6)
+  final String? disposition;
+
+  AttachmentHiveCache({
+    this.partId,
+    this.blobId,
+    this.size,
+    this.name,
+    this.type,
+    this.cid,
+    this.disposition
+  });
+
+  @override
+  List<Object?> get props => [
+    partId,
+    blobId,
+    size,
+    name,
+    type,
+    cid,
+    disposition
+  ];
+}

lib/features/offline_mode/model/detailed_email_hive_cache.dart

@@ -0,0 +1,45 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:hive/hive.dart';
+import 'package:tmail_ui_user/features/caching/utils/caching_constants.dart';
+import 'package:tmail_ui_user/features/offline_mode/model/email_header_hive_cache.dart';
+
+import 'attachment_hive_cache.dart';
+
+part 'detailed_email_hive_cache.g.dart';
+
+@HiveType(typeId: CachingConstants.DETAILED_EMAIL_HIVE_CACHE_ID)
+class DetailedEmailHiveCache extends HiveObject with EquatableMixin {
+
+  @HiveField(0)
+  final String emailId;
+
+  @HiveField(1)
+  final DateTime timeSaved;
+
+  @HiveField(2)
+  final List<AttachmentHiveCache>? attachments;
+
+  @HiveField(3)
+  final String? emailContentPath;
+
+  @HiveField(4)
+  final List<EmailHeaderHiveCache>? headers;
+
+  DetailedEmailHiveCache({
+    required this.emailId,
+    required this.timeSaved,
+    this.attachments,
+    this.emailContentPath,
+    this.headers
+  });
+
+  @override
+  List<Object?> get props => [
+    emailId,
+    timeSaved,
+    attachments,
+    emailContentPath,
+    headers
+  ];
+}

lib/features/offline_mode/model/email_header_hive_cache.dart

@@ -0,0 +1,21 @@
+
+import 'package:equatable/equatable.dart';
+import 'package:hive/hive.dart';
+import 'package:tmail_ui_user/features/caching/utils/caching_constants.dart';
+
+part 'email_header_hive_cache.g.dart';
+
+@HiveType(typeId: CachingConstants.EMAIL_HEADER_HIVE_CACHE_ID)
+class EmailHeaderHiveCache extends HiveObject with EquatableMixin {
+
+  @HiveField(0)
+  final String name;
+
+  @HiveField(1)
+  final String value;
+
+  EmailHeaderHiveCache({required this.name, required this.value});
+
+  @override
+  List<Object?> get props => [name, value];
+}