TF-267 Fix bug display a full page for sorting results

model/lib/email/email_filter.dart

@@ -2,14 +2,16 @@
 import 'package:equatable/equatable.dart';
 import 'package:jmap_dart_client/jmap/core/filter/filter.dart';
 import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
+import 'package:model/email/filter_message_option.dart';
 
 class EmailFilter with EquatableMixin {
 
   final Filter? filter;
+  final FilterMessageOption? filterOption;
   final MailboxId? mailboxId;
 
-  EmailFilter({this.filter, this.mailboxId});
+  EmailFilter({this.filter, this.filterOption, this.mailboxId});
 
   @override
-  List<Object?> get props => [filter, mailboxId];
+  List<Object?> get props => [filter, filterOption, mailboxId];
 }

model/lib/email/filter_message_option.dart

@@ -0,0 +1,40 @@
+
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:model/email/presentation_email.dart';
+import 'package:model/extensions/email_extension.dart';
+
+enum FilterMessageOption {
+  all,
+  unread,
+  attachments,
+  starred,
+}
+
+extension FilterMessageOptionExtension on FilterMessageOption {
+
+  bool filterPresentationEmail(PresentationEmail email) {
+    switch(this) {
+      case FilterMessageOption.all:
+        return true;
+      case FilterMessageOption.unread:
+        return email.isUnReadEmail();
+      case FilterMessageOption.attachments:
+        return email.withAttachments;
+      case FilterMessageOption.starred:
+        return email.isFlaggedEmail();
+    }
+  }
+
+  bool filterEmail(Email email) {
+    switch(this) {
+      case FilterMessageOption.all:
+        return true;
+      case FilterMessageOption.unread:
+        return email.isUnReadEmail();
+      case FilterMessageOption.attachments:
+        return email.withAttachments;
+      case FilterMessageOption.starred:
+        return email.isFlaggedEmail();
+    }
+  }
+}