87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
package user
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import (
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"context"
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"bindbox-game/internal/repository/mysql/model"
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)
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func (s *service) ListCoupons(ctx context.Context, userID int64, page, pageSize int) (items []*model.UserCoupons, total int64, err error) {
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return s.ListCouponsByStatus(ctx, userID, 1, page, pageSize)
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}
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// ListCouponsByStatus 按状态获取用户优惠券列表
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func (s *service) ListCouponsByStatus(ctx context.Context, userID int64, status int32, page, pageSize int) (items []*model.UserCoupons, total int64, err error) {
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q := s.readDB.UserCoupons.WithContext(ctx).ReadDB().Where(
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s.readDB.UserCoupons.UserID.Eq(userID),
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s.readDB.UserCoupons.Status.Eq(status),
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)
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total, err = q.Count()
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if err != nil {
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return nil, 0, err
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}
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if page <= 0 {
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page = 1
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}
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if pageSize <= 0 {
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pageSize = 20
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}
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if pageSize > 100 {
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pageSize = 100
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}
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items, err = q.Order(s.readDB.UserCoupons.ID.Desc()).Offset((page - 1) * pageSize).Limit(pageSize).Find()
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if err != nil {
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return nil, 0, err
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}
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return items, total, nil
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}
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// ListAppCoupons APP端查看优惠券（分类逻辑优化：未使用=未动过，已使用=部分使用or已用完）
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// ListAppCoupons APP端查看优惠券（分类逻辑优化：未使用=未动过，已使用=部分使用or已用完）
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func (s *service) ListAppCoupons(ctx context.Context, userID int64, status int32, page, pageSize int) (items []*model.UserCoupons, total int64, err error) {
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u := s.readDB.UserCoupons
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c := s.readDB.SystemCoupons
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// 使用 UnderlyingDB 绕过 GEN 的类型限制，确保 SQL 逻辑正确
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tableName := u.TableName()
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sysTableName := c.TableName()
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db := u.UnderlyingDB().WithContext(ctx).
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Table(tableName).
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Select("`"+tableName+"`.*").
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Joins("LEFT JOIN `"+sysTableName+"` ON `"+sysTableName+"`.id = `"+tableName+"`.coupon_id").
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Where("`"+tableName+"`.user_id = ?", userID)
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// 过滤逻辑
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switch status {
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case 1: // 未使用 (Status=1且余额>0)
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db = db.Where(u.TableName()+".status = ? AND "+u.TableName()+".balance_amount > ?", 1, 0)
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case 2: // 已使用 (Status=2 或 Status=1且余额=0)
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// Condition: (Status=1 AND Balance = 0) OR Status=2
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db = db.Where("("+u.TableName()+".status = ? AND "+u.TableName()+".balance_amount = ?) OR "+u.TableName()+".status = ?", 1, 0, 2)
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case 3: // 已过期
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db = db.Where(u.TableName()+".status = ?", 3)
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default: // 默认只查未使用 (fallback to 1 logic)
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db = db.Where(u.TableName()+".status = ? AND "+u.TableName()+".balance_amount > ?", 1, 0)
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}
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// Count
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if err = db.Count(&total).Error; err != nil {
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return nil, 0, err
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}
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if page <= 0 {
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page = 1
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}
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if pageSize <= 0 {
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pageSize = 20
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}
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// Find
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err = db.Order("`" + tableName + "`.id DESC").Offset((page - 1) * pageSize).Limit(pageSize).Scan(&items).Error
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if err != nil {
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return nil, 0, err
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}
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return items, total, nil
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}
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