I'm re-writing an old Umbraco 7 site in Umbraco 10. The v 7 site allowed pdfs to be stored in a folder in wwwroot and indexed them for search purposes.

In the new site they must still be saved under wwwroot but I cannot find how to index them.

In the old site the indexing was done in the code below, can anyone suggest how this should be amended?

public ReturnInformation GetRebuildIndex(int nodeId)

{ var status = "Error re-indexing the files. Fact sheets have been made live, but are not indexed correctly.";

try
{
    _umbracoContextAccessor.TryGetUmbracoContext(out var context);
    var node = context.Content.GetById(nodeId);
    if (node != null && node.ContentType.Alias == "pdfCollection")
    {
        var clientSpecific = node.GetProperty("clientSpecific")?.GetValue() != null &&
                             (bool)node.GetProperty("clientSpecific").GetValue();
        if (!clientSpecific)
        {
            // Rebuild the fact sheet index, so non-client-specific fact sheets will be included in the site search
            _examineManager.GetIndex("pdfIndexer").CreateIndex();
            status = "File uploaded and unpacked. Contents are now live and have been re-indexed.";
        }
        else
        {
            status = "File uploaded and unpacked. Contents are now live.";
        }
    }
}
catch (Exception e)
{
    Log.Error( "Rebuilding index", e);
}

ReturnInformation rtn = new ReturnInformation();
rtn.ReturnStr = status;

return rtn;

}