Adds the items to the custom index

Index-Content.ps1

public int IndexContent()
{
    var indexedCount = 0;

    using (new SecurityDisabler())
    {
        try
        {
            //get the blog posts from Sitecore
            var blogPostsRootPath = _master.GetItem(Settings.GetSetting("BlogPostsRootPath"));

            //get all children of the root
            var blogPostItems = blogPostsRootPath.Axes.GetDescendants();

            foreach (var item in blogPostItems)
            {
                //check the item is one of the allowed templates
                if (blogPostTemplatesToAllow.Contains(item.TemplateID.ToString()))
                {
                    _logService.Info($"Adding Item to Index: {item.Name} - {item.ID} ", this);

                    //convert to an indexable item
                    var searchItem = new SitecoreIndexableItem(item);

                    using (var index = ContentSearchManager.GetIndex(IndexName))
                    {
                        var context = index.CreateUpdateContext();
                        //add the item to the index
                        index.Operations.Add(searchItem, context, index.Configuration);
                        context.Commit();
                        indexedCount +=1;
                    }
                }
            }
        }
        catch (Exception ex)
        {
            _logService.Error($"error calling IndexContent(): {ex.Message}", ex);
        }
    }

    return indexedCount;
}