feat: migrate serevices

2025-12-19 19:05:12 +08:00
parent 005585c53b
commit 557a641f41
71 changed files with 5626 additions and 280 deletions
--- a/backend_v1/app/services/orders.go
+++ b/backend_v1/app/services/orders.go
@@ -0,0 +1,133 @@
+package services
+
+import (
+	"context"
+
+	"quyun/v2/app/requests"
+	"quyun/v2/database/models"
+	"quyun/v2/pkg/fields"
+
+	"github.com/pkg/errors"
+	"github.com/samber/lo"
+	"go.ipao.vip/gen"
+)
+
+// @provider
+type orders struct{}
+
+// List 订单列表（支持按订单号模糊查询、按用户过滤）。
+func (m *orders) List(
+	ctx context.Context,
+	pagination *requests.Pagination,
+	orderNumber *string,
+	userID *int64,
+) (*requests.Pager, error) {
+	pagination.Format()
+
+	tbl, query := models.OrderQuery.QueryContext(ctx)
+
+	conds := make([]gen.Condition, 0, 2)
+	if orderNumber != nil && *orderNumber != "" {
+		conds = append(conds, tbl.OrderNo.Like("%"+*orderNumber+"%"))
+	}
+	if userID != nil {
+		conds = append(conds, tbl.UserID.Eq(*userID))
+	}
+
+	orders, cnt, err := query.
+		Where(conds...).
+		Order(tbl.ID.Desc()).
+		FindByPage(int(pagination.Offset()), int(pagination.Limit))
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to list orders")
+	}
+
+	// 这里刻意使用“先查订单，再批量查关联”的方式，避免在分页时 JOIN 造成重复行/分页不稳定。
+	postIDs := lo.Uniq(lo.Map(orders, func(o *models.Order, _ int) int64 { return o.PostID }))
+	userIDs := lo.Uniq(lo.Map(orders, func(o *models.Order, _ int) int64 { return o.UserID }))
+
+	posts, err := models.PostQuery.WithContext(ctx).GetByIDs(postIDs...)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get posts by ids")
+	}
+	users, err := models.UserQuery.WithContext(ctx).GetByIDs(userIDs...)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get users by ids")
+	}
+
+	postMap := lo.SliceToMap(posts, func(p *models.Post) (int64, *models.Post) { return p.ID, p })
+	userMap := lo.SliceToMap(users, func(u *models.User) (int64, *models.User) { return u.ID, u })
+
+	// OrderListItem 用于订单列表展示，补充作品标题与用户名等冗余信息，避免前端二次查询。
+	type orderListItem struct {
+		*models.Order
+		PostTitle string `json:"post_title"`
+		Username  string `json:"username"`
+	}
+
+	items := lo.Map(orders, func(o *models.Order, _ int) *orderListItem {
+		item := &orderListItem{Order: o}
+		if post, ok := postMap[o.PostID]; ok {
+			item.PostTitle = post.Title
+		}
+		if user, ok := userMap[o.UserID]; ok {
+			item.Username = user.Username
+		}
+		return item
+	})
+
+	return &requests.Pager{
+		Items:      items,
+		Total:      cnt,
+		Pagination: *pagination,
+	}, nil
+}
+
+// Refund 订单退款（余额支付走本地退款；微信支付走微信退款并标记为退款处理中）。
+func (m *orders) Refund(ctx context.Context, id int64) error {
+	// 余额支付：这里强调“状态一致性”，必须在一个事务中完成：余额退回 + 撤销购买权益 + 更新订单状态。
+	return models.Q.Transaction(func(tx *models.Query) error {
+		order, err := tx.Order.WithContext(ctx).GetByID(id)
+		if err != nil {
+			return errors.Wrap(err, "failed to get order in tx")
+		}
+
+		// 退回余额（使用原子自增，避免并发覆盖）。
+		costBalance := order.Meta.Data().CostBalance
+		if costBalance > 0 {
+			if _, err := tx.User.
+				WithContext(ctx).
+				Where(tx.User.ID.Eq(order.UserID)).
+				Inc(tx.User.Balance, costBalance); err != nil {
+				return errors.Wrap(err, "failed to refund balance")
+			}
+		}
+
+		// 撤销已购买的作品权限（删除 user_posts 记录）。
+		if _, err := tx.UserPost.
+			WithContext(ctx).
+			Where(
+				tx.UserPost.UserID.Eq(order.UserID),
+				tx.UserPost.PostID.Eq(order.PostID),
+			).
+			Delete(); err != nil {
+			return errors.Wrap(err, "failed to revoke user post")
+		}
+
+		// 更新订单状态为“退款成功”。
+		if _, err := tx.Order.
+			WithContext(ctx).
+			Where(tx.Order.ID.Eq(order.ID)).
+			Update(tx.Order.Status, fields.OrderStatusRefundSuccess); err != nil {
+			return errors.Wrap(err, "failed to update order status")
+		}
+
+		return nil
+	})
+
+}
+
+// GetByOrderNO
+func (m *orders) GetByOrderNO(ctx context.Context, orderNo string) (*models.Order, error) {
+	return models.OrderQuery.WithContext(ctx).Where(models.OrderQuery.OrderNo.Eq(orderNo)).First()
+}