Merge pull request 'Sender Invitation' (#245) from SEND024 into main

Reviewed-on: #245
Reviewed-by: tech <tech.sendico@proton.me>

frontend/pshared/lib/provider/invitations.dart

@@ -0,0 +1,64 @@
+import 'package:pshared/data/mapper/invitation/invitation.dart';
+import 'package:pshared/models/invitation/invitation.dart';
+import 'package:pshared/models/invitation/status.dart';
+import 'package:pshared/provider/organizations.dart';
+import 'package:pshared/provider/template.dart';
+import 'package:pshared/service/invitation/service.dart';
+
+
+class InvitationsProvider extends GenericProvider<Invitation> {
+  InvitationsProvider() : super(service: InvitationService.basicService);
+
+  late OrganizationsProvider _organizations;
+  String? _loadedOrganizationId;
+
+  List<Invitation> get invitations => List<Invitation>.unmodifiable(items);
+
+  void updateProviders(OrganizationsProvider organizations) {
+    _organizations = organizations;
+    if (_organizations.isOrganizationSet) {
+      final organizationId = _organizations.current.id;
+      if (_loadedOrganizationId != organizationId) {
+        _loadedOrganizationId = organizationId;
+        load(organizationId, organizationId);
+      }
+    }
+  }
+
+  Future<Invitation> sendInvitation({
+    required String email,
+    required String roleRef,
+    required String inviterRef,
+    String name = '',
+    String comment = '',
+    DateTime? expiresAt,
+  }) async {
+    final invitation = newInvitation(
+      organizationRef: _organizations.current.id,
+      roleRef: roleRef,
+      inviterRef: inviterRef,
+      email: email,
+      name: name,
+      comment: comment,
+      expiresAt: expiresAt,
+    );
+
+    return createObject(_organizations.current.id, invitation.toDTO().toJson());
+  }
+
+  Future<void> updateInvitation(Invitation invitation) {
+    return update(invitation.toDTO().toJson());
+  }
+
+  Future<void> revokeInvitation(Invitation invitation) {
+    return updateInvitation(invitation.copyWith(status: InvitationStatus.revoked));
+  }
+
+  Future<void> setInvitationArchived(Invitation invitation, bool archived) {
+    return setArchived(
+      organizationRef: _organizations.current.id,
+      objectRef: invitation.id,
+      newIsArchived: archived,
+    );
+  }
+}