using Microsoft.EntityFrameworkCore;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.IdentityModel.Tokens.Jwt;
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using System.Linq;
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using System.Security.Claims;
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using System.Threading.Tasks;
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using WIDESEA_Core.CacheManager;
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using WIDESEA_Core.DBManager;
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using WIDESEA_Core.Enums;
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using WIDESEA_Core.Extensions;
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using WIDESEA_Core.Extensions.AutofacManager;
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using WIDESEA_Entity;
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using WIDESEA_Entity.DomainModels;
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namespace WIDESEA_Core.ManageUser
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{
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public class UserContext
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{
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/// <summary>
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/// 为了尽量减少redis或Memory读取,保证执行效率,将UserContext注入到DI，
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/// 每个UserContext的属性至多读取一次redis或Memory缓存从而提高查询效率
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/// </summary>
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public static UserContext Current
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{
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get
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{
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return Context.RequestServices.GetService(typeof(UserContext)) as UserContext;
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}
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}
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private static Microsoft.AspNetCore.Http.HttpContext Context
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{
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get
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{
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return Utilities.HttpContext.Current;
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}
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}
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private static ICacheService CacheService
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{
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get { return GetService<ICacheService>(); }
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}
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private static T GetService<T>() where T : class
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{
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return AutofacContainerModule.GetService<T>();
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}
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public UserInfo UserInfo
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{
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get
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{
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if (_userInfo != null)
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{
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return _userInfo;
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}
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return GetUserInfo(UserId);
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}
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}
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private UserInfo _userInfo { get; set; }
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/// <summary>
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/// 角色ID为1的默认为超级管理员
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/// </summary>
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public bool IsSuperAdmin
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{
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get { return IsRoleIdSuperAdmin(this.RoleId); }
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}
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/// <summary>
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/// 角色ID为1的默认为超级管理员
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/// </summary>
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public static bool IsRoleIdSuperAdmin(int roleId)
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{
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return roleId == 1;
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}
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public UserInfo GetUserInfo(int userId)
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{
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if (_userInfo != null) return _userInfo;
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if (userId <= 0)
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{
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_userInfo = new UserInfo();
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return _userInfo;
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}
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string key = userId.GetUserIdKey();
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_userInfo = CacheService.Get<UserInfo>(key);
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if (_userInfo != null && _userInfo.User_Id > 0) return _userInfo;
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_userInfo = DBServerProvider.DbContext.Set<Sys_User>()
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.Where(x => x.User_Id == userId).Select(s => new UserInfo()
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{
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User_Id = userId,
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Role_Id = s.Role_Id.GetInt(),
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RoleName = s.RoleName,
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Token = s.Token,
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UserName = s.UserName,
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UserTrueName = s.UserTrueName,
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Enable = s.Enable
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}).FirstOrDefault();
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if (_userInfo != null && _userInfo.User_Id > 0)
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{
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CacheService.AddObject(key, _userInfo);
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}
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return _userInfo ?? new UserInfo();
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}
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/// <summary>
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/// 获取角色权限时通过安全字典锁定的角色id
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/// </summary>
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private static ConcurrentDictionary<string, object> objKeyValue = new ConcurrentDictionary<string, object>();
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/// <summary>
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/// 角色权限的版本号
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/// </summary>
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private static readonly Dictionary<int, string> rolePermissionsVersion = new Dictionary<int, string>();
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/// <summary>
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/// 每个角色ID对应的菜单权限（已做静态化处理）
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/// 每次获取权限时用当前服务器的版本号与redis/memory缓存的版本比较,如果不同会重新刷新缓存
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/// </summary>
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private static readonly Dictionary<int, List<Permissions>> rolePermissions = new Dictionary<int, List<Permissions>>();
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/// <summary>
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/// 获取用户所有的菜单权限
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/// </summary>
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public List<Permissions> Permissions
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{
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get
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{
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return GetPermissions(RoleId);
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}
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}
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/// <summary>
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/// 获取单个表的权限
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/// </summary>
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/// <param name="tableName"></param>
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/// <returns></returns>
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public Permissions GetPermissions(string tableName)
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{
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return GetPermissions(RoleId).Where(x => x.TableName == tableName).FirstOrDefault();
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}
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/// <summary>
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/// 自定条件查询权限
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/// </summary>
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/// <param name="func"></param>
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/// <returns></returns>
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public Permissions GetPermissions(Func<Permissions, bool> func)
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{
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return GetPermissions(RoleId).Where(func).FirstOrDefault();
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}
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private List<Permissions> ActionToArray(List<Permissions> permissions)
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{
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permissions.ForEach(x =>
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{
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try
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{
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x.UserAuthArr = string.IsNullOrEmpty(x.UserAuth)
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? new string[0]
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: x.UserAuth.Split(",");
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}
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catch { }
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finally
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{
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if (x.UserAuthArr == null)
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{
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x.UserAuthArr = new string[0];
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}
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}
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});
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return permissions;
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}
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private List<Permissions> MenuActionToArray(List<Permissions> permissions)
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{
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permissions.ForEach(x =>
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{
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try
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{
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x.UserAuthArr = string.IsNullOrEmpty(x.UserAuth)
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? new string[0]
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: x.UserAuth.DeserializeObject<List<Sys_Actions>>().Select(s => s.Value).ToArray();
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}
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catch { }
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finally
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{
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if (x.UserAuthArr == null)
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{
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x.UserAuthArr = new string[0];
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}
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}
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});
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return permissions;
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}
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public List<Permissions> GetPermissions(int roleId)
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{
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if (IsRoleIdSuperAdmin(roleId))
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{
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var permissions = DBServerProvider.DbContext.Set<Sys_Menu>().Where(x => x.Enable == 1).Select(a => new Permissions
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{
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Menu_Id = a.Menu_Id,
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ParentId = a.ParentId,
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//2020.05.06增加默认将表名转换成小写，权限验证时不再转换
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TableName = (a.TableName ?? "").ToLower(),
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//MenuAuth = a.Auth,
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UserAuth = a.Auth,
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}).ToList();
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return MenuActionToArray(permissions);
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}
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ICacheService cacheService = CacheService;
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string roleKey = roleId.GetRoleIdKey();
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//角色有缓存，并且当前服务器的角色版本号与redis/memory缓存角色的版本号相同直接返回静态对象角色权限
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string currnetVeriosn = "";
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if (rolePermissionsVersion.TryGetValue(roleId, out currnetVeriosn)
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&& currnetVeriosn == cacheService.Get(roleKey))
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{
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return rolePermissions.ContainsKey(roleId) ? rolePermissions[roleId] : new List<Permissions>();
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}
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//锁定每个角色，通过安全字典减少锁粒度，否则多个同时角色获取缓存会导致阻塞
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object objId = objKeyValue.GetOrAdd(roleId.ToString(), new object());
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//锁定每个角色
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lock (objId)
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{
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if (rolePermissionsVersion.TryGetValue(roleId, out currnetVeriosn)
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&& currnetVeriosn == cacheService.Get(roleKey))
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{
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return rolePermissions.ContainsKey(roleId) ? rolePermissions[roleId] : new List<Permissions>();
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}
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//没有redis/memory缓存角色的版本号或与当前服务器的角色版本号不同时，刷新缓存
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var dbContext = DBServerProvider.DbContext;
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List<Permissions> _permissions = (from a in dbContext.Set<Sys_Menu>()
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join b in dbContext.Set<Sys_RoleAuth>()
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on a.Menu_Id equals b.Menu_Id
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where b.Role_Id == roleId //&& a.ParentId > 0
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&& b.AuthValue != ""
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orderby a.ParentId
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select new Permissions
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{
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Menu_Id = a.Menu_Id,
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ParentId = a.ParentId,
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//2020.05.06增加默认将表名转换成小写，权限验证时不再转换
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TableName = (a.TableName ?? "").ToLower(),
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MenuAuth = a.Auth,
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UserAuth = b.AuthValue ?? ""
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}).ToList();
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ActionToArray(_permissions);
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string _version = cacheService.Get(roleKey);
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//生成一个唯一版本号标识
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if (_version == null)
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{
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_version = DateTime.Now.ToString("yyyyMMddHHMMssfff");
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//将版本号写入缓存
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cacheService.Add(roleKey, _version);
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}
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//刷新当前服务器角色的权限
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rolePermissions[roleId] = _permissions;
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//写入当前服务器的角色最新版本号
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rolePermissionsVersion[roleId] = _version;
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return _permissions;
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}
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}
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/// <summary>
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/// 判断是否有权限
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/// </summary>
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/// <param name="tableName"></param>
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/// <param name="authName"></param>
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/// <param name="roleId"></param>
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/// <returns></returns>
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public bool ExistsPermissions(string tableName, string authName, int roleId = 0)
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{
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if (roleId <= 0) roleId = RoleId;
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tableName = tableName.ToLower();
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authName = authName.ToLower();
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return GetPermissions(roleId).Any(x => x.TableName == tableName && x.UserAuthArr.Contains(authName));
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}
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/// <summary>
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/// 判断是否有权限
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/// </summary>
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/// <param name="tableName"></param>
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/// <param name="authName"></param>
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/// <param name="roleId"></param>
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/// <returns></returns>
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public bool ExistsPermissions(string tableName, ActionPermissionOptions actionPermission, int roleId = 0)
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{
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return ExistsPermissions(tableName, actionPermission.ToString(),roleId);
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}
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public int UserId
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{
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get
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{
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return (Context.User.FindFirstValue(JwtRegisteredClaimNames.Jti)
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?? Context.User.FindFirstValue(ClaimTypes.NameIdentifier)).GetInt();
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}
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}
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public string UserName
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{
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get { return UserInfo.UserName; }
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}
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public string UserTrueName
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{
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get { return UserInfo.UserTrueName; }
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}
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public string Token
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{
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get { return UserInfo.Token; }
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}
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public int RoleId
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{
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get { return UserInfo.Role_Id; }
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}
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public void LogOut(int userId)
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{
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CacheService.Remove(userId.GetUserIdKey());
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}
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}
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}
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