src/SSCMS.Core/StlParser/StlElement/StlChannels.cs

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using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using SSCMS.Core.StlParser.Attributes;
using SSCMS.Core.StlParser.Enums;
using SSCMS.Core.StlParser.Mocks;
using SSCMS.Parse;
using SSCMS.Core.StlParser.Models;
using SSCMS.Core.StlParser.Utility;
using SSCMS.Enums;
using SSCMS.Models;
using SSCMS.Services;
using SSCMS.Utils;

namespace SSCMS.Core.StlParser.StlElement
{
    [StlElement(Title = "栏目列表", Description = "通过 stl:channels 标签在模板中显示栏目列表")]
    public class StlChannels : StlListBase
    {
        public const string ElementName = "stl:channels";

        [StlAttribute(Title = "从所有栏目中选择")] private const string IsTotal = nameof(IsTotal);

        [StlAttribute(Title = "显示所有级别的子栏目")] private const string IsAllChildren = nameof(IsAllChildren);

        public static async Task<object> ParseAsync(IParseManager parseManager)
        {
            var listInfo = await ListInfo.GetListInfoAsync(parseManager, ParseType.Channel);

            var dataSource = await GetChannelsDataSourceAsync(parseManager, listInfo);

            if (parseManager.ContextInfo.IsStlEntity)
            {
                return ParseEntity(dataSource);
            }

            return await ParseAsync(parseManager, listInfo, dataSource);
        }

        protected static async Task<string> ParseAsync(IParseManager parseManager, ListInfo listInfo, List<KeyValuePair<int, Channel>> channels)
        {
            var pageInfo = parseManager.PageInfo;

            if (channels == null || channels.Count == 0) return string.Empty;

            var builder = new StringBuilder();
            if (listInfo.Layout == ListLayout.None)
            {
                if (!string.IsNullOrEmpty(listInfo.HeaderTemplate))
                {
                    builder.Append(listInfo.HeaderTemplate);
                }

                var isAlternative = false;
                var isSeparator = false;
                if (!string.IsNullOrEmpty(listInfo.AlternatingItemTemplate))
                {
                    isAlternative = true;
                }
                if (!string.IsNullOrEmpty(listInfo.SeparatorTemplate))