src/ZKEACMS/Common/Service/BreadcrumbWidgetService.cs

微信扫码关注公众号，代码整理好后第一时间通知你。

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

using System.Collections.Generic;
using System.Linq;
using Easy;
using Easy.Extend;
using ZKEACMS.Common.Models;
using ZKEACMS.Widget;
using ZKEACMS.Page;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace ZKEACMS.Common.Service
{
    public class BreadcrumbWidgetService : SimpleWidgetService<BreadcrumbWidget>
    {
        private readonly IPageService _pageService;

        public BreadcrumbWidgetService(IWidgetBasePartService widgetBasePartService, IApplicationContext applicationContext, IPageService pageService, CMSDbContext dbContext) :
            base(widgetBasePartService, applicationContext, dbContext)
        {
            _pageService = pageService;
        }

        public override DbSet<BreadcrumbWidget> CurrentDbSet => DbContext.BreadcrumbWidget;

        public override object Display(WidgetDisplayContext widgetDisplayContext)
        {
            List<PageEntity> parentPages = new List<PageEntity>();
            var layout = widgetDisplayContext.PageLayout;
            if (layout != null && layout.Page != null)
            {
                GetParentPage(parentPages, layout.Page);
            }
            return parentPages;
        }

        void GetParentPage(List<PageEntity> parentPages, PageEntity page)
        {
            parentPages.Insert(0, page);
            if (page.ParentId.IsNotNullAndWhiteSpace() && page.ParentId != "#")
            {
                var parentPage = _pageService.Get(m => m.ID == page.ParentId).FirstOrDefault();
                if (parentPage != null)
                {
                    GetParentPage(parentPages, parentPage);
                }
            }
        }
    }
}