Rock.Model.HistoryService.AddChanges C# (CSharp) Method

        public static void AddChanges( RockContext rockContext, Type modelType, Guid categoryGuid, int entityId, List<string> changes, string caption, Type relatedModelType, int? relatedEntityId, int? modifiedByPersonAliasId = null )
        {
            var entityType = EntityTypeCache.Read( modelType );
            var category = CategoryCache.Read( categoryGuid );
            var creationDate = RockDateTime.Now;

            int? relatedEntityTypeId = null;
            if ( relatedModelType != null )
            {
                var relatedEntityType = EntityTypeCache.Read( relatedModelType );
                if ( relatedModelType != null )
                {
                    relatedEntityTypeId = relatedEntityType.Id;
                }
            }

            if ( entityType != null && category != null )
            {
                var historyService = new HistoryService( rockContext );

                foreach ( string message in changes.Where( m => m != null && m != "" ) )
                {
                    var history = new History();
                    history.EntityTypeId = entityType.Id;
                    history.CategoryId = category.Id;
                    history.EntityId = entityId;
                    history.Caption = caption.Truncate(200);
                    history.Summary = message;
                    history.RelatedEntityTypeId = relatedEntityTypeId;
                    history.RelatedEntityId = relatedEntityId;

                    if ( modifiedByPersonAliasId.HasValue )
                    {
                        history.CreatedByPersonAliasId = modifiedByPersonAliasId;
                    }

                    // Manually set creation date on these history items so that they will be grouped together
                    history.CreatedDateTime = creationDate;

                    historyService.Add( history );
                }
            }
        }