ds8-solution-pro/ds-wms-service/DS.WMS.Core/Application/Method/ApplicationService`1.cs

using DS.Module.Core;
using DS.Module.Core.Extensions;
using DS.WMS.Core.Application.Entity;
using DS.WMS.Core.Fee.Entity;
using DS.WMS.Core.Fee.Method;
using DS.WMS.Core.Flow.Dtos;
using DS.WMS.Core.Flow.Entity;
using DS.WMS.Core.Flow.Interface;
using DS.WMS.Core.Sys.Interface;
using Microsoft.Extensions.DependencyInjection;
using SqlSugar;

namespace DS.WMS.Core.Application.Method
{
    /// <summary>
    /// 申请单基础实现
    /// </summary>
    /// <typeparam name="TEntity">实体的类型声明</typeparam>
    /// <typeparam name="TModel">模型的类型声明</typeparam>
    public class ApplicationService<TEntity> : FeeServiceBase
        where TEntity : ApplicationBase, new()
        //where TModel : ApplicationDto
    {
        readonly IClientFlowInstanceService flowService;
        readonly Lazy<ICommonService> commonService;

        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="serviceProvider">DI容器</param>
        public ApplicationService(IServiceProvider serviceProvider) : base(serviceProvider)
        {
            flowService = serviceProvider.GetRequiredService<IClientFlowInstanceService>();
            commonService = new Lazy<ICommonService>(serviceProvider.GetRequiredService<ICommonService>());
        }

        #region 保存

        /// <summary>
        /// 提交保存费用申请单
        /// </summary>
        /// <param name="application">申请单</param>
        /// <returns></returns>
        public async Task<DataResult> SaveAsync(TEntity application)
        {
            application.Details ??= [];
            if (application.Id > 0)
            {
                //修改需检查申请单状态
                var model = await TenantDb.Queryable<TEntity>().Where(x => x.Id == application.Id).Select(
                    x => new TEntity { Status = x.Status, Currency = x.Currency }).FirstAsync();

                if (model == null)
                    return DataResult.Failed("未能获取申请单信息");

                var result = PreSave(application, model);
                if (!result.Succeeded)
                    return result;
            }

            List<FeeRecord>? fees = null;
            if (application.Details.Count > 0)
            {
                if (application.Details.GroupBy(x => x.CustomerName).Select(x => x.Key).Count() > 1)
                    return DataResult.Failed("申请单的结算对象有且只能有一个");

                //仅处理新增的明细
                var ids = application.Details.FindAll(x => x.Id == 0).Select(x => x.RecordId).ToList();
                fees = await TenantDb.Queryable<FeeRecord>().Where(x => ids.Contains(x.Id)).Select(x => new FeeRecord
                {
                    Id = x.Id,
                    Amount = x.Amount,
                    OrderAmount = x.OrderAmount,
                    OrderSettlementAmount = x.OrderSettlementAmount,
                    SettlementAmount = x.SettlementAmount
                }).ToListAsync();

                var result = CalculateAmount(application, fees);
                if (!result.Succeeded)
                    return result;
            }

            if (application.Currency.IsNullOrEmpty())
                application.ExchangeRate = 1m;

            await TenantDb.Ado.BeginTranAsync();
            try
            {
                //关联导航属性插入
                if (application.Id == 0)
                {
                    //创建时需要生成申请单编号
                    var sequence = commonService.Value.GetSequenceNext<PaymentApplication>();
                    if (!sequence.Succeeded)
                    {
                        return DataResult.Failed(sequence.Message, MultiLanguageConst.SequenceSetNotExist);
                    }
                    application.ApplicationNO = sequence.Data;

                    await TenantDb.InsertNav(application).Include(x => x.Details).ExecuteCommandAsync();
                }
                else
                {
                    var createList = application.Details.FindAll(x => x.Id == 0);
                    if (createList.Count > 0)
                        await TenantDb.Insertable(createList).ExecuteCommandAsync();

                    await TenantDb.Updateable(application).IgnoreColumns(x => new
                    {
                        x.ApplicationNO,
                        //x.Currency,
                        x.CreateBy,
                        x.CreateTime,
                        x.Deleted,
                        x.DeleteBy,
                        x.DeleteTime
                    }).ExecuteCommandAsync();
                }

                if (fees != null && fees.Count > 0)
                    await UpdateFeesAsync(fees);

                await TenantDb.Ado.CommitTranAsync();
                PostSave(application);
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.Failed("发生错误，提交失败");
            }
        }

        /// <summary>
        /// 在保存执行前调用，用于执行先决条件的检查
        /// </summary>
        /// <param name="application">提交的申请单</param>
        /// <param name="dbValue">数据库值，新增时为null</param>
        /// <returns></returns>
        protected virtual DataResult PreSave(TEntity application, TEntity dbValue)
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 根据申请单明细，计算费用记录的剩余额度
        /// </summary>
        /// <param name="application">申请单</param>
        /// <param name="fees">费用记录</param>
        /// <returns></returns>
        protected virtual DataResult CalculateAmount(TEntity application, List<FeeRecord> fees)
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 更新费用记录时调用
        /// </summary>
        /// <param name="fees">费用记录</param>
        /// <returns></returns>
        protected virtual Task UpdateFeesAsync(List<FeeRecord> fees)
        {
            return Task.CompletedTask;
        }

        /// <summary>
        /// 在保存完成后调用
        /// </summary>
        /// <param name="application">申请单</param>
        protected virtual void PostSave(TEntity application)
        {
        }

        #endregion

        #region 删除
        /// <summary>
        /// 删除申请单明细
        /// </summary>
        /// <param name="ids">申请单明细ID</param>
        /// <returns></returns>
        public async Task<DataResult> DeleteDetailAsync(params long[] ids)
        {
            var details = await TenantDb.Queryable<ApplicationDetail>().Where(x => ids.Contains(x.Id)).Select(
                x => new ApplicationDetail
                {
                    Id = x.Id,
                    ApplicationId = x.ApplicationId,
                    RecordId = x.RecordId,
                    OriginalAmount = x.OriginalAmount
                }).ToListAsync();

            var appIds = details.Select(x=>x.ApplicationId).Distinct().ToList();
            var apps = await TenantDb.Queryable<TEntity>().Where(x => appIds.Contains(x.Id)).Select(x => new TEntity
            {
                Id = x.Id,
                Status = x.Status
            }).ToListAsync();

            var result = PreDelete(apps);
            if (!result.Succeeded)
                return result;

            await TenantDb.Ado.BeginTranAsync();
            try
            {
                await OnDeleteDetailAsync(details);
                await TenantDb.Deleteable(details).ExecuteCommandAsync();

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.Failed("删除失败!");
            }
        }

        /// <summary>
        /// 在删除申请单或其明细之前调用，用于检查申请单状态
        /// </summary>
        /// <param name="applications">申请单</param>
        /// <returns></returns>
        protected virtual DataResult PreDelete(List<TEntity> applications) 
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 在执行删除申请单或其明细时调用
        /// </summary>
        /// <param name="details">申请单明细</param>
        /// <returns></returns>
        protected virtual Task OnDeleteDetailAsync(List<ApplicationDetail> details) 
        {
            return Task.CompletedTask;
        }

        /// <summary>
        /// 删除申请单
        /// </summary>
        /// <param name="ids">申请单ID</param>
        /// <returns></returns>
        public async Task<DataResult> DeleteAsync(params long[] ids)
        {
            var apps = await TenantDb.Queryable<TEntity>().Where(x => ids.Contains(x.Id)).Select(x => new TEntity
            {
                Id = x.Id,
                Status = x.Status
            }).ToListAsync();
            var result = PreDelete(apps);
            if (!result.Succeeded)
                return result;

            var details = await TenantDb.Queryable<ApplicationDetail>().Where(x => ids.Contains(x.ApplicationId)).Select(
                x => new ApplicationDetail
                {
                    Id = x.Id,
                    RecordId = x.RecordId,
                    OriginalAmount = x.OriginalAmount
                }).ToListAsync();

            await TenantDb.Ado.BeginTranAsync();
            try
            {
                await OnDeleteDetailAsync(details);
                await TenantDb.DeleteNav<TEntity>(x => ids.Contains(x.Id)).Include(x => x.Details).ExecuteCommandAsync();

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.Failed("删除失败!");
            }
        }

        #endregion

        #region 审批

        /// <summary>
        /// 提交审批
        /// </summary>
        /// <param name="auditType">审批类型</param>
        /// <param name="remark">审批备注</param>
        /// <param name="idArray">申请单ID</param>
        /// <returns></returns>
        public async Task<DataResult> SubmitApprovalAsync(AuditType auditType, string remark, params long[] idArray)
        {
            var list = await TenantDb.Queryable<TEntity>().LeftJoin<ApplicationDetail>((x, y) => x.Id == y.ApplicationId)
                .GroupBy((x, y) => x.Id)
                .Where((x, y) => idArray.Contains(x.Id))
                .Select((x, y) => new TEntity
                {
                    Id = x.Id,
                    Status = x.Status,
                    DetailCount = SqlFunc.AggregateCount(y.Id)
                }).ToListAsync();

            if (list.Count == 0)
                return DataResult.Failed("未能找到申请单记录");

            if (list.Exists(x => x.DetailCount == 0))
                return DataResult.Failed("提交审批时必须包含费用明细，请检查");

            var result = PreSubmitApproval(list);
            if (!result.Succeeded)
                return result;

            var template = await FindTemplateAsync(auditType);
            if (template == null)
                return DataResult.Failed("未能找到审批模板");

            await TenantDb.Ado.BeginTranAsync();
            try
            {
                var list2 = list.Select(x => new TEntity { Id = x.Id, Status = x.Status }).ToList();
                foreach (var item in list2)
                {
                    result = flowService.CreateFlowInstance(new CreateFlowInstanceReq
                    {
                        BusinessId = item.Id,
                        TemplateId = template.Id
                    });

                    if (result.Succeeded)
                    {
                        var instance = result.Data as FlowInstance;
                        flowService.StartFlowInstance(instance.Id.ToString());

                        item.FlowId = instance.Id;
                        OnSubmitApproval(item);
                        await TenantDb.Updateable(item).UpdateColumns(x => new { x.Status, x.FlowId }).ExecuteCommandAsync();
                    }
                }

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Success;
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.Failed("发生错误，提交失败");
            }
        }

        /// <summary>
        /// 在提交审批前调用，用于检查申请单状态
        /// </summary>
        /// <param name="applications">申请单</param>
        /// <returns></returns>
        protected virtual DataResult PreSubmitApproval(List<TEntity> applications) 
        {
            return DataResult.Success;
        }

        /// <summary>
        /// 在提交审批时调用，用于更新申请单信息
        /// </summary>
        /// <param name="application">申请单</param>
        /// <returns></returns>
        protected virtual void OnSubmitApproval(TEntity application)
        {
        }

        /// <summary>
        /// 撤销审批
        /// </summary>
        /// <param name="ids">申请单ID</param>
        /// <returns></returns>
        public async Task<DataResult> WithdrawAsync(params long[] ids)
        {
            var list = await TenantDb.Queryable<TEntity>().Where(x => ids.Contains(x.Id)).Select(
                x => new TEntity
                {
                    Id = x.Id,
                    ApplicationNO = x.ApplicationNO,
                    Status = x.Status,
                    FlowId = x.FlowId
                }).ToListAsync();

            if (list.Count == 0)
                return DataResult.Failed("未能找到申请单记录");
            //未在审批状态中
            var list2 = list.FindAll(x => x.FlowId == null).ToList();
            if (list2.Count > 0)
            {
                string msg = string.Join("; ", list2.Select(x => $"{x.ApplicationNO}"));
                return DataResult.Failed($"以下申请单：{msg} 未在审批状态中，无需撤销");
            }

            var flows = list.Select(x => new FlowInstance { Id = x.FlowId.Value, FlowStatus = (int)FlowStatusEnum.Draft, MakerList = string.Empty }).ToList();
            DateTime dtNow = DateTime.Now;
            try
            {
                await Db.Updateable(flows).UpdateColumns(x => new { x.FlowStatus, x.MakerList }).ExecuteCommandAsync();

                foreach (var item in list)
                {
                    item.Status = 0;
                    item.FlowId = null;
                }

                await TenantDb.Updateable(list).UpdateColumns(x => new { x.Status, x.FlowId }).ExecuteCommandAsync();

                await TenantDb.Ado.CommitTranAsync();
                return DataResult.Successed("提交成功!");
            }
            catch (Exception ex)
            {
                await TenantDb.Ado.RollbackTranAsync();
                await ex.LogAsync(Db);
                return DataResult.Failed("提交失败!");
            }
        }

        #endregion
    }
}