content-delivery-api-4.cs

using Umbraco.Cms.Core.Models.PublishedContent;
using Umbraco.Cms.Core.PropertyEditors;
using Umbraco.Cms.Core.PropertyEditors.DeliveryApi;
using Umbraco.Forms.Core.Models;
using Umbraco.Forms.Core.Models.Api;
using Umbraco.Forms.Core.Services;

namespace Umbraco.Forms.Core.PropertyEditors.ValueConverters
{
    [DefaultPropertyValueConverter]
    public class FormPickerValueConverter : PropertyValueConverterBase, IDeliveryApiPropertyValueConverter
    {
        private readonly IFormService _formService;
        private readonly FormDtoFactory _formDtoFactory;

        public FormPickerValueConverter(IFormService formService, FormDtoFactory formDtoFactory)
        {
            _formService = formService;
            _formDtoFactory = formDtoFactory;
        }

        ...

        public PropertyCacheLevel GetDeliveryApiPropertyCacheLevel(IPublishedPropertyType propertyType) => PropertyCacheLevel.Element;

        public Type GetDeliveryApiPropertyValueType(IPublishedPropertyType propertyType) => typeof(DeliveryApiFormDto);

        public object? ConvertIntermediateToDeliveryApiObject(IPublishedElement owner, IPublishedPropertyType propertyType, PropertyCacheLevel referenceCacheLevel, object? inter, bool preview, bool expanding)
        {
            if (inter == null)
            {
                return null;
            }

            var formId = (Guid)inter;

            // If not expanding, return just the form Id with a null value for the form details.
            if (expanding == false)
            {
                return new DeliveryApiFormDto { Id = formId };
            }

            // Get the full details of the form.
            Form? form = _formService.Get(formId);
            if (form == null)
            {
                return new DeliveryApiFormDto { Id = formId };
            }

            // Build the same FormDto as would be retrieved directly via the Forms API and associate it with the returned object.
            FormDto formDto = _formDtoFactory.BuildFormDefinitionDto(form);
            return new DeliveryApiFormDto { Id = formId, Form = formDto };
        }
    }
}