NestedContentMapper.cs

public class NestedContentMapper : IContentMapper
    {

        private IContentTypeService contentTypeService;
        private IDataTypeService dataTypeService;

        public NestedContentMapper()
        {
            contentTypeService = ApplicationContext.Current.Services.ContentTypeService;
            dataTypeService = ApplicationContext.Current.Services.DataTypeService;
        }

        public string GetExportValue(int dataTypeDefinitionId, string value)
        {
            var array = JsonConvert.DeserializeObject<JArray>(value);
            
            
            foreach (var ncObj in array)
            {
                var doctype = contentTypeService.GetContentType(ncObj["ncContentTypeAlias"].ToString());

                if (doctype == null)
                    continue;

                foreach (var propertyType in doctype.PropertyTypes)
                {
                    object o;
                    if ((o = ncObj[propertyType.Alias]) != null)
                    {
                        IDataTypeDefinition dataType = dataTypeService.GetDataTypeDefinitionById(propertyType.DataTypeDefinitionId);
                        uSyncContentMapping mapping = uSyncCoreContext.Instance.Configuration.Settings.ContentMappings.SingleOrDefault(x => x.EditorAlias == dataType.PropertyEditorAlias);

                        if (mapping != null)
                        {
                            IContentMapper mapper = ContentMapperFactory.GetMapper(mapping);

                            if (mapper != null)
                            {
                                ncObj[propertyType.Alias] = mapper.GetExportValue(dataType.Id, ncObj[propertyType.Alias].ToString());
                            }
                        }
                    }
                }
            }
            
            return JsonConvert.SerializeObject(array);
        }

        public string GetImportValue(int dataTypeDefinitionId, string content)
        {
            var array = JsonConvert.DeserializeObject<JArray>(content);

            foreach (var ncObj in array)
            {
                var doctype = contentTypeService.GetContentType(ncObj["ncContentTypeAlias"].ToString());

                if (doctype == null)
                    continue;

                foreach (var propertyType in doctype.PropertyTypes)
                {
                    object o;
                    if ((o = ncObj[propertyType.Alias]) != null)
                    {
                        IDataTypeDefinition dataType = dataTypeService.GetDataTypeDefinitionById(propertyType.DataTypeDefinitionId);
                        uSyncContentMapping mapping = uSyncCoreContext.Instance.Configuration.Settings.ContentMappings.SingleOrDefault(x => x.EditorAlias == dataType.PropertyEditorAlias);

                        if (mapping != null)
                        {
                            IContentMapper mapper = ContentMapperFactory.GetMapper(mapping);

                            if (mapper != null)
                            {
                                ncObj[propertyType.Alias] = mapper.GetImportValue(dataType.Id, ncObj[propertyType.Alias].ToString());
                            }
                        }
                    }
                }
            }

            return JsonConvert.SerializeObject(array);
        }
    }