/// <summary>Find out if a principal has a certain permission for an item.</summary>
/// <param name="item">The item to check against.</param>
/// <param name="user">The principal to check for allowance.</param>
/// <param name="permission">The type of permission to map against.</param>
/// <returns>True if the item has public access or the principal is allowed to access it.</returns>
public virtual bool IsAuthorized(IPrincipal user, ContentItem item, Permission permission)
{
if (permission == Permission.None)
{
return(true);
}
if (item == null)
{
return(IsAuthorized(user, permission));
}
if (permission == Permission.Read)
{
return(IsAuthorized(item, user));
}
foreach (PermissionRemapAttribute remap in item.GetContentType().GetCustomAttributes(typeof(PermissionRemapAttribute), true))
{
permission = remap.Remap(permission);
}
return(Administrators.Authorizes(user, item, permission) ||
Editors.Authorizes(user, item, permission) ||
Writers.Authorizes(user, item, permission));
}