using FlexJobApi.Core;
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using Furion;
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using Furion.DatabaseAccessor;
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using Furion.FriendlyException;
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using MediatR;
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using Microsoft.AspNetCore.Http;
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using Microsoft.EntityFrameworkCore;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace FlexJobApi.User.Application
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{
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/// <summary>
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/// 获取资源字段
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/// </summary>
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public class GetResourceFieldsQueryHandler(
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IRepository<Resource> rep
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) : IRequestHandler<GetResourceFieldsQuery, List<GetResourceFieldsQueryResultItem>>
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{
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private readonly IRepository<Resource> rep = rep;
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/// <inheritdoc/>
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public async Task<List<GetResourceFieldsQueryResultItem>> Handle(GetResourceFieldsQuery request, CancellationToken cancellationToken)
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{
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var a = App.GetService<IHttpContextAccessor>();
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var b = JwtUtils.GetCurrentLogier();
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var model = await rep.AsQueryable().AsNoTracking()
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.Where(it => it.Id == request.Id)
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.Select(it => new
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{
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it.RequestTypeName,
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it.ResponseTypeName
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})
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.FirstOrDefaultAsync();
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if (model == null) throw Oops.Oh(EnumErrorCodeType.s404, "资源");
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var requestType = App.Assemblies.SelectMany(it => it.GetTypes()).FirstOrDefault(it => it.FullName == model.RequestTypeName);
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if (requestType == null) throw Oops.Oh(EnumErrorCodeType.s404, "资源");
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var xmlDoc = await XmlDocUtils.GetXmlDocAsync();
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if (requestType.BaseType?.IsGenericType == true
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&& requestType.BaseType.GetGenericTypeDefinition() == typeof(PagedListQuery<,>))
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{
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var pagedListItemType = requestType.BaseType.GenericTypeArguments[1];
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return await GetFields(pagedListItemType, xmlDoc, []);
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}
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else if (requestType.Name.EndsWith("Command"))
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{
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return await GetFields(requestType, xmlDoc, []);
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}
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else if (model.ResponseTypeName.IsNotNull())
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{
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var responseType = Type.GetType(model.ResponseTypeName);
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if (responseType == null) throw Oops.Oh(EnumErrorCodeType.s404, "资源");
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return await GetFields(responseType, xmlDoc, []);
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}
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return [];
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}
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private async Task<List<GetResourceFieldsQueryResultItem>> GetFields(Type type, XmlDoc xmlDoc, HashSet<Type> processedTypes)
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{
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var fields = new List<GetResourceFieldsQueryResultItem>();
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if (type.IsGenericType)
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{
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type = type.GenericTypeArguments[0];
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}
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// 过滤无效类型（null、非类、不含目标命名空间）
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if (type == null || !type.IsClass || type.FullName == null || !type.FullName.Contains("FlexJobApi"))
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{
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return fields;
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}
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// 关键：如果类型已处理过，直接返回（避免循环引用死循环）
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if (processedTypes.Contains(type))
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{
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return fields;
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}
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// 将当前类型标记为已处理
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processedTypes.Add(type);
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// 获取当前类型的所有公共属性
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var props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
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foreach (var prop in props)
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{
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var item = new GetResourceFieldsQueryResultItem();
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var propXmlDoc = await prop.GetXmlDocMemberAsync(xmlDoc);
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item.Code = prop.Name;
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item.Name = propXmlDoc?.Summary;
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fields.Add(item);
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// 递归获取子属性的字段（传入已处理集合，避免死循环）
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var childrenFields = await GetFields(prop.PropertyType, xmlDoc, processedTypes);
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if (childrenFields.Any())
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{
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var childrens = childrenFields
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.Select(it => new GetResourceFieldsQueryResultItem
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{
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Code = $"{item.Code}.{it.Code}",
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Name = it.Name
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})
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.ToList();
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fields.AddRange(childrens);
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}
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}
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// 移除当前类型的标记（允许其他分支重新处理，如不同路径下的同一类型）
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processedTypes.Remove(type);
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return fields;
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}
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}
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}
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