private Content GetSharingGroupByUrlParameter()
{
var sharingGuid = _httpContext?.Request.Query[Constants.SharingUrlParameterName];
return(string.IsNullOrEmpty(sharingGuid)
? null
: SharingHandler.GetSharingGroupBySharingId(sharingGuid));
}
private static Content GetSharingGroupByUrlParameter(NameValueCollection parameters)
{
var sharingGuid = parameters?[Constants.SharingUrlParameterName];
return(string.IsNullOrEmpty(sharingGuid)
? null
: SharingHandler.GetSharingGroupBySharingId(sharingGuid));
}
internal MembershipExtension GetSharingExtension(string contextValue)
{
// check the url first
var sharingGroup = GetSharingGroupByUrlParameter()?.ContentHandler as Group;
// check the context param next
if (sharingGroup == null && contextValue != null)
{
sharingGroup = SharingHandler.GetSharingGroupBySharingId(contextValue)?.ContentHandler as Group;
}
if (sharingGroup == null)
{
return(MembershipExtension.Placeholder);
}
var sharedNode = sharingGroup.GetReference <GenericContent>(Constants.SharedContentFieldName);
// Check if the related shared content exists.
if (sharedNode == null)
{
// Invalid sharing group: no related content. Delete the group and move on.
SnTrace.Security.Write($"SharingMembershipExtender: Deleting orphaned sharing group {sharingGroup.Id} ({sharingGroup.Path}).");
sharingGroup.ForceDelete();
sharingGroup = null;
}
// If found and the content is not in the Trash, return a new extension collection
// containing the sharing group.
if ((sharingGroup?.ContentType.IsInstaceOfOrDerivedFrom(Constants.SharingGroupTypeName) ?? false) &&
!TrashBin.IsInTrash(sharedNode))
{
return(new MembershipExtension(new[] { sharingGroup.Id }));
}
return(MembershipExtension.Placeholder);
}