public void OnItemSaved(object sender, EventArgs args)
        {
            var item        = Event.ExtractParameter(args, 0) as Item;
            var itemChanges = Event.ExtractParameter(args, 1) as ItemChanges;

            if (item == null ||
                item.Paths.FullPath.StartsWith("/sitecore/templates") ||
                !item.TemplateID.Equals(Settings.PersonFaceTemplateId) ||
                itemChanges == null)
            {
                return;
            }

            using (new Sitecore.Data.Events.EventDisabler())
            {
                var imageField = (ImageField)item.Fields[Settings.FaceImageFieldId];
                var groupId    = item.Parent.Parent.Fields[Settings.FaceEntityIdFieldId]?.Value ?? string.Empty;
                var personId   = item.Parent.Fields[Settings.FaceEntityIdFieldId]?.Value ?? string.Empty;
                if (string.IsNullOrWhiteSpace(imageField?.Value) ||
                    string.IsNullOrWhiteSpace(groupId) ||
                    string.IsNullOrWhiteSpace(personId))
                {
                    return;
                }

                var oldImageValue = itemChanges.FieldChanges[Settings.FaceImageFieldId]?.OriginalValue;
                var faceId        = item.Fields[Settings.FacePersistedFaceIdFieldId]?.Value;

                //if they modified the image remove the face object
                if (!string.IsNullOrWhiteSpace(faceId) && oldImageValue != imageField.Value)
                {
                    PersonGroupService.DeletePersonFace(groupId, new Guid(personId), new Guid(faceId));
                }

                Sitecore.Data.Items.MediaItem m = imageField.MediaItem;
                PersonGroupService.CreatePersonFace(item, groupId, new Guid(personId), m.GetMediaStream());
            }
        }
        public void OnItemDeleted(object sender, EventArgs args)
        {
            var item = Event.ExtractParameter(args, 0) as Item;

            if (item == null ||
                item.Paths.FullPath.StartsWith("/sitecore/templates") ||
                !item.TemplateID.Equals(Settings.PersonFaceTemplateId))
            {
                return;
            }

            var groupId  = item.Parent?.Parent?.Fields[Settings.FaceEntityIdFieldId]?.Value ?? string.Empty;
            var personId = item.Parent?.Fields[Settings.FaceEntityIdFieldId]?.Value ?? string.Empty;
            var faceId   = item.Fields[Settings.FacePersistedFaceIdFieldId]?.Value ?? string.Empty;

            if (string.IsNullOrWhiteSpace(groupId) ||
                string.IsNullOrWhiteSpace(personId) ||
                string.IsNullOrWhiteSpace(faceId))
            {
                return;
            }

            PersonGroupService.DeletePersonFace(groupId, new Guid(personId), new Guid(faceId));
        }