Startup.cs

using System;
using System.Text.Json.Dynamic;
using System.Text.Json.Nodes;
using Fluid;
using Fluid.Values;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using OrchardCore.ContentManagement;
using OrchardCore.ContentManagement.Display.ContentDisplay;
using OrchardCore.Data.Migration;
using OrchardCore.DisplayManagement.Descriptors;
using OrchardCore.DisplayManagement.Liquid.Filters;
using OrchardCore.Indexing;
using OrchardCore.Liquid.Drivers;
using OrchardCore.Liquid.Filters;
using OrchardCore.Liquid.Handlers;
using OrchardCore.Liquid.Indexing;
using OrchardCore.Liquid.Models;
using OrchardCore.Liquid.Services;
using OrchardCore.Liquid.ViewModels;
using OrchardCore.Modules;
using OrchardCore.ResourceManagement;

namespace OrchardCore.Liquid
{
    public class Startup : StartupBase
    {
        public override void Configure(IApplicationBuilder app, IEndpointRouteBuilder routes, IServiceProvider serviceProvider)
        {
            app.UseMiddleware<ScriptsMiddleware>();
        }

        public override void ConfigureServices(IServiceCollection services)
        {
            services.AddScoped<ILiquidTemplateManager, LiquidTemplateManager>();

            services.Configure<TemplateOptions>(options =>
            {
                options.Filters.AddFilter("t", LiquidViewFilters.Localize);
                options.Filters.AddFilter("html_class", LiquidViewFilters.HtmlClass);
                options.Filters.AddFilter("shape_properties", LiquidViewFilters.ShapeProperties);

                options.MemberAccessStrategy.Register<LiquidPartViewModel>();

                // Used to provide a factory to return a value based on a property name that is unknown at registration time.
                options.MemberAccessStrategy.Register<LiquidPropertyAccessor, FluidValue>((obj, name) => obj.GetValueAsync(name));

                // When a property of a 'JsonObject' value is accessed, try to look into its properties.
                options.MemberAccessStrategy.Register<JsonObject, object>((source, name) => source[name]);

                // Convert JToken to FluidValue
                options.ValueConverters.Add(x =>
                {
                    return x switch
                    {
                        JsonObject o => new ObjectValue(o),
                        JsonDynamicObject o => new ObjectValue((JsonObject)o),
                        JsonValue o => o.GetObjectValue(),
                        DateTime d => new ObjectValue(d),
                        _ => null
                    };
                });

                options.Filters.AddFilter("json", JsonFilter.Json);
                options.Filters.AddFilter("jsonparse", JsonParseFilter.JsonParse);
            })
            .AddLiquidFilter<LocalTimeZoneFilter>("local")
            .AddLiquidFilter<UtcTimeZoneFilter>("utc")
            .AddLiquidFilter<SlugifyFilter>("slugify")
            .AddLiquidFilter<LiquidFilter>("liquid")
            .AddLiquidFilter<ContentUrlFilter>("href")
            .AddLiquidFilter<AbsoluteUrlFilter>("absolute_url")
            .AddLiquidFilter<NewShapeFilter>("shape_new")
            .AddLiquidFilter<ShapeRenderFilter>("shape_render")
            .AddLiquidFilter<ShapeStringifyFilter>("shape_stringify");

            services.AddTransient<IConfigureOptions<ResourceManagementOptions>, ResourceManagementOptionsConfiguration>();
        }
    }

    [RequireFeatures("OrchardCore.Contents")]
    public class LiquidPartStartup : StartupBase
    {
        public override void ConfigureServices(IServiceCollection services)
        {
            // Liquid Part
            services.AddScoped<IShapeTableProvider, LiquidShapes>();
            services.AddContentPart<LiquidPart>()
                .UseDisplayDriver<LiquidPartDisplayDriver>()
                .AddHandler<LiquidPartHandler>();

            services.AddDataMigration<Migrations>();
            services.AddScoped<IContentPartIndexHandler, LiquidPartIndexHandler>();
        }
    }

    [RequireFeatures("OrchardCore.Shortcodes")]
    public class ShortcodesStartup : StartupBase
    {
        public override void ConfigureServices(IServiceCollection services)
        {
            services.AddLiquidFilter<ShortcodeFilter>("shortcode");
        }
    }
}