59 lines
2.9 KiB
Go
59 lines
2.9 KiB
Go
// Package wallet 提供代理主钱包复杂写用例。
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package wallet
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import (
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"context"
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domainwallet "github.com/break/junhong_cmp_fiber/internal/domain/wallet"
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"github.com/break/junhong_cmp_fiber/internal/model"
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"github.com/break/junhong_cmp_fiber/internal/model/dto"
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"github.com/break/junhong_cmp_fiber/pkg/constants"
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"github.com/break/junhong_cmp_fiber/pkg/errors"
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"gorm.io/gorm"
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)
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// ChangeCreditService 调整既有店铺主钱包实际信用额度。
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type ChangeCreditService struct {
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db *gorm.DB
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}
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// NewChangeCreditService 创建实际信用额度调整服务。
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func NewChangeCreditService(db *gorm.DB) *ChangeCreditService {
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return &ChangeCreditService{db: db}
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}
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// Execute 按主钱包类型和版本条件更新，不修改余额、冻结金额或钱包流水。
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func (s *ChangeCreditService) Execute(ctx context.Context, shopID uint, enabled bool, limit int64, version int) (*dto.ShopCreditLimitResponse, error) {
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var result *dto.ShopCreditLimitResponse
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err := s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
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var stored model.AgentWallet
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if err := tx.Where("shop_id = ? AND wallet_type = ?", shopID, constants.AgentWalletTypeMain).First(&stored).Error; err != nil {
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return errors.New(errors.CodeWalletNotFound, "店铺主钱包不存在")
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}
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aggregate := domainwallet.AgentWallet{ID: stored.ID, ShopID: stored.ShopID, WalletType: stored.WalletType, Balance: stored.Balance, FrozenBalance: stored.FrozenBalance, CreditEnabled: stored.CreditEnabled, CreditLimit: stored.CreditLimit, Status: stored.Status, Version: stored.Version}
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if err := aggregate.ChangeCredit(enabled, limit); err != nil {
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return err
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}
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update := tx.Model(&model.AgentWallet{}).
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Where("id = ? AND wallet_type = ? AND version = ? AND balance::numeric - frozen_balance::numeric + ?::numeric >= 0", stored.ID, constants.AgentWalletTypeMain, version, aggregate.EffectiveCredit()).
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Updates(map[string]any{"credit_enabled": enabled, "credit_limit": limit, "version": gorm.Expr("version + 1")})
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if update.Error != nil {
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return errors.Wrap(errors.CodeInternalError, update.Error, "更新店铺信用额度失败")
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}
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if update.RowsAffected != 1 {
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var current model.AgentWallet
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if err := tx.Where("id = ? AND wallet_type = ?", stored.ID, constants.AgentWalletTypeMain).First(¤t).Error; err != nil {
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return errors.New(errors.CodeWalletNotFound, "店铺主钱包不存在")
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}
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if current.Version != version {
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return errors.New(errors.CodeConflict, "钱包版本已变化，请刷新后重试")
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}
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return errors.New(errors.CodeInsufficientQuota, "当前资金占用无法降低或关闭信用额度")
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}
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available, _ := aggregate.AvailableBalance()
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result = &dto.ShopCreditLimitResponse{ShopID: shopID, WalletID: stored.ID, Balance: stored.Balance, FrozenBalance: stored.FrozenBalance, CreditEnabled: enabled, CreditLimit: limit, AvailableBalance: available, Version: version + 1}
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return nil
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})
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return result, err
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}
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