using Furion;
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using Furion.DatabaseAccessor;
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using Furion.DistributedIDGenerator;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.ChangeTracking;
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using Microsoft.EntityFrameworkCore.Diagnostics;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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using Newtonsoft.Json;
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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.Linq.Expressions;
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using System.Text;
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using System.Threading.Tasks;
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namespace FlexJobApi.Core
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{
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public static class DbUtils
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{
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/// <summary>
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/// 生成实体
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/// </summary>
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/// <param name="modelBuilder"></param>
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/// <param name="dbContextLocator"></param>
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/// <returns></returns>
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public static async Task BuildEntity(ModelBuilder modelBuilder, Type dbContextLocator = null)
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{
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var xmlDoc = await XmlDocUtils.GetXmlDocAsync();
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foreach (var entityType in modelBuilder.Model.GetEntityTypes())
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{
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Console.WriteLine($"正在生成表：{entityType.Name}");
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// 获取实体类的XML注释，并设置为表注释
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var entityBuilder = modelBuilder.Entity(entityType.ClrType);
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string typeComment = (await entityType.ClrType.GetXmlDocMemberAsync(xmlDoc))?.Summary;
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if (!string.IsNullOrEmpty(typeComment))
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{
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Console.WriteLine($"正在生成表注释：{entityType.Name}-{typeComment}");
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entityBuilder.ToTable(it => it.HasComment(typeComment));
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}
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// 获取实体属性的XML注释，并设置为列注释
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var properties = entityType.ClrType.GetProperties()
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.Where(p =>
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p.CanRead
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&& p.CanWrite
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&& !typeof(System.Collections.ICollection).IsAssignableFrom(p.PropertyType)
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&& (p.PropertyType.IsClass ? p.PropertyType.FullName.Contains("System.") : true));
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foreach (var property in properties)
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{
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string propComment = (await property.GetXmlDocMemberAsync(xmlDoc))?.Summary;
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if (!string.IsNullOrEmpty(propComment))
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{
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Console.WriteLine($"正在生成属性注释：{property.Name}-{propComment}");
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entityBuilder.Property(property.Name).HasComment(propComment);
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}
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}
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if (typeof(CommonEntity).IsAssignableFrom(entityType.ClrType))
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{
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// 构建筛选条件：IsDeleted == false
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var parameter = Expression.Parameter(entityType.ClrType, "e");
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var property = Expression.Property(parameter, "IsDeleted");
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var constant = Expression.Constant(false);
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var equal = Expression.Equal(property, constant);
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var lambda = Expression.Lambda(equal, parameter);
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// 添加全局筛选器
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modelBuilder.Entity(entityType.ClrType).HasQueryFilter(lambda);
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}
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}
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}
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public static void SavingChangesEvent(DbContextEventData eventData, InterceptionResult<int> result)
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{
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// 获取当前事件对应上下文
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var dbContext = eventData.Context;
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// 强制重新检查一边实体更改信息
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// dbContext.ChangeTracker.DetectChanges();
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// 获取所有更改，删除，新增的实体
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var dbAuditLogIgnoreType = typeof(IDbAuditLogIgnore);
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var physicalDeletionType = typeof(IPhysicalDeletion);
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var entities = dbContext.ChangeTracker.Entries()
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.Where(u =>
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u.GetType() != typeof(DbAuditLog)
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&& (u.State == EntityState.Modified
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|| u.State == EntityState.Deleted
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|| u.State == EntityState.Added))
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.ToList();
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// 通过请求中获取当前操作人
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var logier = JwtUtils.GetCurrentLogier();
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// 获取所有已更改的实体
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foreach (var entity in entities)
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{
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// 获取实体类型
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var entityType = entity.Entity.GetType();
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if (entity.State == EntityState.Added)
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{
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// 赋值创建日期
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var prop = entity.Property(nameof(CommonEntity.CreatedTime));
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if (prop != null && prop.CurrentValue?.ToDateTime() == null)
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{
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prop.CurrentValue = DateTimeOffset.Now;
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}
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// 生成Id
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prop = entity.Property(nameof(CommonEntity.Id));
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var defaultValue = Activator.CreateInstance(prop.Metadata.ClrType);
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if (prop != null && (prop.CurrentValue == null || prop.CurrentValue.Equals(defaultValue)))
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{
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prop.CurrentValue = IDGen.NextID();
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}
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// 赋值用户信息Id
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prop = entity.Property(nameof(CommonEntity.CreatedUserInfoId));
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if (prop != null && prop.CurrentValue == null)
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{
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prop.CurrentValue = logier?.UserInfoId;
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}
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// 赋值跟踪Id
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prop = entity.Property(nameof(CommonEntity.TraceId));
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if (prop != null)
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{
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prop.CurrentValue = App.GetTraceId();
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}
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}
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else
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{
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// 赋值修改日期
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var prop = entity.Property(nameof(CommonEntity.UpdatedTime));
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if (prop != null)
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{
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prop.CurrentValue = DateTimeOffset.Now;
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}
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// 赋值用户信息Id
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prop = entity.Property(nameof(CommonEntity.UpdatedUserInfoId));
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if (prop != null)
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{
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prop.CurrentValue = logier?.UserInfoId;
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}
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// 赋值跟踪Id
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prop = entity.Property(nameof(CommonEntity.TraceId));
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if (prop != null)
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{
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prop.CurrentValue = App.GetTraceId();
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}
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// 软删除
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if (entity.State == EntityState.Deleted && !physicalDeletionType.IsAssignableFrom(entityType))
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{
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entity.State = EntityState.Modified;
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prop = entity.Property(nameof(CommonEntity.IsDeleted));
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if (prop != null)
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{
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prop.CurrentValue = true;
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}
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}
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}
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if (dbAuditLogIgnoreType.IsAssignableFrom(entityType))
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{
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continue;
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}
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Db.GetRepository<DbAuditLog, LogDbContextLocator>().InsertNow(new DbAuditLog
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{
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Id = IDGen.NextID(),
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TableName = entityType.Name,
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PrimaryKey = (Guid)entity.Property("Id").CurrentValue,
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NewValues = entity.State == EntityState.Added || entity.State == EntityState.Modified
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? GetPropertyValuesAsJson(entity)
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: null,
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OldValues = entity.State == EntityState.Deleted || entity.State == EntityState.Modified
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? GetPropertyValuesAsJson(entity, entity.State == EntityState.Modified)
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: null,
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Operate = entity.State == EntityState.Added
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? EnumDbAuditOperate.Added
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: entity.State == EntityState.Modified
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? EnumDbAuditOperate.Modified
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: EnumDbAuditOperate.Deleted,
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TraceId = App.GetTraceId(),
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CreatedTime = DateTime.Now,
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CreatedUserInfoId = logier?.UserInfoId,
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});
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}
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}
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private static string GetPropertyValuesAsJson(EntityEntry entry, bool getOldValues = false)
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{
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var properties = entry.Properties
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.Where(p => getOldValues ? p.IsModified : true)
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.ToDictionary(p => p.Metadata.Name, p => getOldValues ? p.OriginalValue : p.CurrentValue);
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return JsonConvert.SerializeObject(properties);
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}
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}
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}
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