src/ZKEACMS.Product/Service/ProductDetailWidgetService.cs

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/* http://www.zkea.net/ 
 * Copyright (c) ZKEASOFT. All rights reserved. 
 * http://www.zkea.net/licenses */

using System;
using Easy;
using Microsoft.AspNetCore.Http;
using Microsoft.EntityFrameworkCore;
using ZKEACMS.Product.Models;
using ZKEACMS.Widget;
using Microsoft.AspNetCore.Mvc;
using System.Linq;
using Easy.Extend;
using System.Collections.Concurrent;

namespace ZKEACMS.Product.Service
{
    public class ProductDetailWidgetService : WidgetService<ProductDetailWidget>
    {
        private const string ProductDetailWidgetRelatedPageUrls = "ProductDetailWidgetRelatedPageUrls";
        private readonly ConcurrentDictionary<string, object> _allRelatedUrlCache;
        private readonly IProductService _productService;
        public ProductDetailWidgetService(IWidgetBasePartService widgetService,
            IProductService productService,
            IApplicationContext applicationContext,
            Easy.Cache.ICacheManager<ConcurrentDictionary<string, object>> cacheManager,
            CMSDbContext dbContext)
            : base(widgetService, applicationContext, dbContext)
        {
            _productService = productService;
            _allRelatedUrlCache = cacheManager.GetOrAdd(ProductDetailWidgetRelatedPageUrls, new ConcurrentDictionary<string, object>());
        }
        private void DismissRelatedPageUrls()
        {
            _allRelatedUrlCache.TryRemove(ProductDetailWidgetRelatedPageUrls, out var urls);
        }

        public override void AddWidget(WidgetBase widget)
        {
            base.AddWidget(widget);
            DismissRelatedPageUrls();
        }

        public override void DeleteWidget(string widgetId)
        {
            base.DeleteWidget(widgetId);
            DismissRelatedPageUrls();
        }
        public override object Display(WidgetDisplayContext widgetDisplayContext)
        {
            var actionContext = widgetDisplayContext.ActionContext;
            int productId = actionContext.RouteData.GetPost();
            ProductEntity product = null;
            if (productId != 0)
            {
                product = actionContext.RouteData.GetProduct(productId) ?? _productService.Get(productId);
                if (product != null && product.Url.IsNotNullAndWhiteSpace() && actionContext.RouteData.GetProductUrl().IsNullOrWhiteSpace())
                {
                    actionContext.RedirectTo($"{actionContext.RouteData.GetPath()}/{product.Url}.html", true);
                }