/// <summary>
/// Uses a <see cref="GroupMemberService"/> to determine
/// whether a given <see cref="User"/> is a member of this
/// or of a nested <see cref="Group"/>.
/// </summary>
/// <param name="user">
/// A <see cref="User"/> entity to check.
/// </param>
/// <param name="groupMemberService">
/// The instance of <see cref="GroupMemberService"/>
/// to use for checking nested group membership.
/// </param>
/// <returns>
/// <c>true</c> if the given <paramref name="user"/>
/// is a member of this group or of a nested group;
/// otherwise, <c>false</c>.
/// </returns>
public bool IsMember(User user, GroupMemberService groupMemberService)
{
AssertionConcern.AssertArgumentNotNull(user, "User must not be null.");
AssertionConcern.AssertArgumentEquals(this.TenantId, user.TenantId, "Wrong tenant for this group.");
AssertionConcern.AssertArgumentTrue(user.IsEnabled, "User is not enabled.");
bool isMember = this.GroupMembers.Contains(user.ToGroupMember());
if (isMember)
{
isMember = groupMemberService.ConfirmUser(this, user);
}
else
{
isMember = groupMemberService.IsUserInNestedGroup(this, user);
}
return(isMember);
}