GetBrandDetailsViewBlock.cs

using System;
using System.Linq;
using System.Threading.Tasks;
using Sitecore.Commerce.Core;
using Sitecore.Commerce.EntityViews;
using Sitecore.Framework.Conditions;
using Sitecore.Framework.Pipelines;
using Sitecore.Services.Examples.Entities.Entities;

namespace Sitecore.Services.Examples.Entities.Pipelines.Blocks
{
    [PipelineDisplayName("GetBrandDetailsViewBlock")]
    public class GetBrandDetailsViewBlock : PipelineBlock<EntityView, EntityView, CommercePipelineExecutionContext>
    {
        public override Task<EntityView> Run(EntityView entityView, CommercePipelineExecutionContext context)
        {
            Condition.Requires(entityView).IsNotNull($"{Name}: The argument cannot be null");
            var viewArg = context.CommerceContext.GetObject<EntityViewArgument>();
            var entityViewArgument = viewArg;
            var viewName = entityViewArgument?.ViewName;
            if (string.IsNullOrEmpty(viewName) || !viewArg.ViewName.Equals("Details", StringComparison.OrdinalIgnoreCase) && !viewArg.ViewName.Equals("Master", StringComparison.OrdinalIgnoreCase))
            {
                return Task.FromResult(entityView);
            }

            if (!viewArg.ForAction.Equals("AddBrand", StringComparison.OrdinalIgnoreCase) || !viewArg.ViewName.Equals("Details", StringComparison.OrdinalIgnoreCase))
            {
                var isEdit = viewArg.ForAction.Equals("EditBrand", StringComparison.OrdinalIgnoreCase);

                if (!(viewArg.Entity is Brand) || !isEdit && !string.IsNullOrEmpty(viewArg.ForAction))
                {
                    return Task.FromResult(entityView);
                }

                var brand = (Brand) viewArg.Entity;
                if (!viewArg.ViewName.Equals("Master", StringComparison.OrdinalIgnoreCase))
                {
                    return Task.FromResult(entityView);
                }

                var properties = entityView.Properties;
                    
                var viewProperty = properties.FirstOrDefault(p => p.Name.Equals("Name", StringComparison.OrdinalIgnoreCase));
                if (viewProperty != null)
                {
                    var viewProperty1 = viewProperty;
                          
                    viewProperty1.RawValue = brand.Name;
                    var viewProperties = entityView.Properties;
                    var rawValue = viewProperties.FirstOrDefault(p => p.Name.Equals("DisplayName", StringComparison.OrdinalIgnoreCase));
                    if (rawValue == null)
                    {
                        var properties1 = entityView.Properties;
                        var viewProperty2 = new ViewProperty
                        {
                            Name = "DisplayName",
                            RawValue = viewProperty.RawValue
                        };
                        properties1.Add(viewProperty2);
                    }
                    else
                    {
                        rawValue.RawValue = viewProperty.RawValue;
                    }
                }
                var detailsView = new EntityView
                {
                    EntityId = entityView.EntityId,
                    Name = "Details"
                };

                entityView.ChildViews.Add(detailsView);
                //Save
            }
            else
            {
                var nameProperty = new ViewProperty
                {
                    Name = "Name",
                    UiType = "string"
                };
                entityView.Properties.Add(nameProperty);

                var displayNameProperty = new ViewProperty
                {
                    Name = "Displayname",
                    UiType = "string"
                };
                entityView.Properties.Add(displayNameProperty);

                var descriptionProperty = new ViewProperty
                {
                    Name = "Description",
                    UiType = "string"
                };
                entityView.Properties.Add(descriptionProperty);
            }
            return Task.FromResult(entityView);
        }
    }
}