[PATCH dart-api-client v3 1/2] fix #4281: access: add `type` property to `PveAccessDomainModel`

[Azharul Haque <haque@azharul.com>]

The realm/domain list returned by /access/domains always includes a
`type` field (pam, pve, ldap, ad, openid), but the model never captured
it. Without it, callers have no way to tell an OpenID Connect realm
apart from a password-based one, which is why the login form falls back
to showing username/password fields even for realms that require a
browser-based OpenID login.

Model the field as a built_value EnumClass (`PveAccessDomainType`)
rather than a plain string, since PVE's realm types are a fixed set;
this gives compile-time checking and avoids stringly-typed comparisons.
The enum is named following this package's existing `Pve*Type`
convention (`PveNodesDiskListType`, `PveTaskLogStatusType`, ...) and
covers all five realm types PVE supports. Note that unlike the previous
plain string, deserializing a realm list containing an unknown type now
throws; that is the standard built_value EnumClass behavior and
acceptable since the set of realm types is fixed.

Also add an `isOpenIdRealm` convenience getter, used by the login form
in the following commits.

Suggested-by: Shan Shaji <s.shaji@proxmox.com>
Signed-off-by: Azharul Haque <haque@azharul.com>
---
 lib/src/models/pve_access_domain_model.dart | 18 ++++++++++++++++++
 lib/src/models/serializers.dart             |  3 ++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/src/models/pve_access_domain_model.dart b/lib/src/models/pve_access_domain_model.dart
index 6298bbe..39e00b9 100644
--- a/lib/src/models/pve_access_domain_model.dart
+++ b/lib/src/models/pve_access_domain_model.dart
@@ -1,3 +1,4 @@
+import 'package:built_collection/built_collection.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
 
@@ -7,12 +8,14 @@ abstract class PveAccessDomainModel
     implements Built<PveAccessDomainModel, PveAccessDomainModelBuilder> {
   // Fields
   String get realm;
+  PveAccessDomainType get type;
   String? get comment;
   String? get tfa;
   @BuiltValueField(wireName: 'default')
   int? get defaultValue;
 
   bool get isDefaultRealm => defaultValue == 1;
+  bool get isOpenIdRealm => type == PveAccessDomainType.openid;
 
   PveAccessDomainModel._();
 
@@ -23,3 +26,18 @@ abstract class PveAccessDomainModel
   static Serializer<PveAccessDomainModel> get serializer =>
       _$pveAccessDomainModelSerializer;
 }
+
+class PveAccessDomainType extends EnumClass {
+  static const PveAccessDomainType ad = _$ad;
+  static const PveAccessDomainType ldap = _$ldap;
+  static const PveAccessDomainType openid = _$openid;
+  static const PveAccessDomainType pam = _$pam;
+  static const PveAccessDomainType pve = _$pve;
+
+  const PveAccessDomainType._(super.name);
+
+  static BuiltSet<PveAccessDomainType> get values => _$values;
+  static PveAccessDomainType valueOf(String name) => _$valueOf(name);
+  static Serializer<PveAccessDomainType> get serializer =>
+      _$pveAccessDomainTypeSerializer;
+}
diff --git a/lib/src/models/serializers.dart b/lib/src/models/serializers.dart
index 0be80fc..458d105 100644
--- a/lib/src/models/serializers.dart
+++ b/lib/src/models/serializers.dart
@@ -39,7 +39,8 @@ part 'serializers.g.dart';
   PveAccessUserModel,
   PveAccessGroupModel,
   PveAccessRoleModel,
-  PveAccessDomainModel
+  PveAccessDomainModel,
+  PveAccessDomainType
 ])
 final Serializers serializers = (_$serializers.toBuilder()
       ..addPlugin(StandardJsonPlugin())
-- 
2.50.1 (Apple Git-155)