Umbraco: How to check if a member is allowed to access a page programmatically

Question

I'm setting up a Umbraco 8 site for creating a prototype.
As I'm playing around with the default code of the Starter Kit, I wanted to change the behaviour of the top navigation.
Currently you can only hide pages for all visitors, but I want to only hide pages based on the members (group) permissions.

I see, that you can check, if a member is in a role with Role.IsUserInRole, but I cannot see a way to get the allowed roles for a page.

Do I need to get the roles and loop through them?
If yes, how do I get them?
If no, what is the right way to do this?

Answer 1

I got it working this way:

IContent content = base.Services.ContentService.GetById(item.Id);
PublicAccessEntry entry = base.Services.PublicAccessService.GetEntryForContent(content);
if (entry != null)
{
    foreach (var r in entry.Rules)
    {
        if (Roles.IsUserInRole(r.RuleValue))
        {
            <a class="nav-link @(item.IsAncestorOrSelf(Model) ? "nav-link--active" : null)" href="@item.Url">@item.Name</a>
        }
    }
}
else
{
    <a class="nav-link @(item.IsAncestorOrSelf(Model) ? "nav-link--active" : null)" href="@item.Url">@item.Name</a>
}

Maybe this needs some more work, as I guess the performance is not that good.