import '../../models/group_model.dart';
import '../../models/group_member_model.dart';

abstract class GroupService {
  /// Returns all groups.
  Future<List<GroupModel>> getGroups();

  /// Creates a new group.
  Future<GroupModel> createGroup(String name, String? description);

  /// Adds a user to a group with the given role.
  Future<GroupMemberModel> addMember(
    String groupId,
    String userId,
    GroupRole role,
  );

  /// Returns all members of a group.
  Future<List<GroupMemberModel>> getGroupMembers(String groupId);
}