TF-3985 Add JMAP SaaS capability com:linagora:params:saas

model/lib/extensions/session_extension.dart

@@ -22,6 +22,7 @@ import 'package:model/principals/capability_principals.dart';
 import 'package:uri/uri.dart';
 
 extension SessionExtension on Session {
+  static const String saaSCapabilityProperties = 'com:linagora:params:saas';
 
   String getDownloadUrl({String? jmapUrl}) {
     final Uri downloadUrlValid;

model/lib/model.dart

@@ -84,4 +84,6 @@ export 'oidc/token_oidc.dart';
 export 'upload/file_info.dart';
 export 'upload/upload_response.dart';
 // Support
-export 'support/contact_support_capability.dart';
+export 'support/contact_support_capability.dart';
+// SaaS
+export 'saas/saas_account_capability.dart';

model/lib/saas/saas_account_capability.dart

@@ -0,0 +1,24 @@
+import 'package:jmap_dart_client/jmap/core/capability/capability_properties.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'saas_account_capability.g.dart';
+
+@JsonSerializable(explicitToJson: true, includeIfNull: false)
+class SaaSAccountCapability extends CapabilityProperties {
+  final bool isPaying;
+  final bool canUpgrade;
+
+  SaaSAccountCapability({this.isPaying = false, this.canUpgrade = false});
+
+  factory SaaSAccountCapability.fromJson(Map<String, dynamic> json) =>
+      _$SaaSAccountCapabilityFromJson(json);
+
+  Map<String, dynamic> toJson() => _$SaaSAccountCapabilityToJson(this);
+
+  static SaaSAccountCapability deserialize(Map<String, dynamic> json) {
+    return SaaSAccountCapability.fromJson(json);
+  }
+
+  @override
+  List<Object?> get props => [isPaying, canUpgrade];
+}