TF-78 Implement mark as unread when touch the "eye slash" icon on the top of screen EmailView

model/lib/email/read_actions.dart

@@ -0,0 +1,5 @@
+
+enum ReadActions {
+  markAsRead,
+  markAsUnread
+}

model/lib/extensions/keyword_identifier_extension.dart

@@ -1,8 +1,15 @@
 import 'package:jmap_dart_client/jmap/core/patch_object.dart';
 import 'package:jmap_dart_client/jmap/mail/email/keyword_identifier.dart';
+import 'package:model/email/read_actions.dart';
 
 extension KeyWordIdentifierExtension on KeyWordIdentifier {
-  String generatePath() {
+  String _generatePath() {
     return '${PatchObject.keywordsProperty}/$value';
   }
+
+  PatchObject generateReadActionPath(ReadActions readActions) {
+    return PatchObject({
+      _generatePath(): readActions == ReadActions.markAsRead ? true : null
+    });
+  }
 }

model/lib/extensions/presentation_email_extension.dart

@@ -14,10 +14,10 @@ extension PresentationEmailExtension on PresentationEmail {
     return '';
   }
 
-  PresentationEmail markAsReadPresentationEmail({required bool isUnread}) {
+  PresentationEmail markAsReadPresentationEmail(ReadActions readActions) {
     var newKeyWord = keywords;
 
-    if (isUnread) {
+    if (readActions == ReadActions.markAsUnread) {
       newKeyWord?.removeWhere((key, value) => key == KeyWordIdentifier.emailSeen);
     } else {
       if (newKeyWord == null) {

model/lib/model.dart

@@ -27,6 +27,7 @@ export 'email/prefix_email_address.dart';
 export 'email/email_action_type.dart';
 export 'email/presentation_email_address.dart';
 export 'email/email_address_cache.dart';
+export 'email/read_actions.dart';
 
 // Extensions
 export 'extensions/email_address_extension.dart';