新功能(#77): 套餐列表返回促销信息

- 新增 SubscribePromo 响应结构，套餐列表每项追加 promo 字段 - 新增 promo.go 促销候选规则查询与资格评估逻辑 - 重构 authMiddleware 提取 authenticateRequest，新增 OptionalAuthMiddleware - /v1/public/subscribe/list 改为可选鉴权，未登录仅展示 campaign 类型促销 - /node/list、/group/list 保持强制鉴权不变 - 每个规格只返回最高优先级命中的规则，promo_price 为单价，expires_at 为秒级时间戳 - 新增单测覆盖 campaign/new_user 命中、活动窗口判定等场景 Co-authored-by: multica-agent <github@multica.ai>
2026-05-26 22:40:58 -07:00
parent d6efcb8e0b
commit 48e507783e
7 changed files with 406 additions and 67 deletions
@@ -0,0 +1,224 @@
+package subscribe
+
+import (
+	"context"
+	"encoding/json"
+	stderrors "errors"
+	"strings"
+	"time"
+
+	"github.com/go-sql-driver/mysql"
+	"github.com/perfect-panel/server/internal/model/user"
+	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/internal/types"
+	"github.com/perfect-panel/server/pkg/constant"
+	"github.com/perfect-panel/server/pkg/xerr"
+	"github.com/pkg/errors"
+	"gorm.io/gorm"
+)
+
+const (
+	promoRuleTypeNewUser      = "new_user"
+	promoRuleTypeInactiveUser = "inactive_user"
+	promoRuleTypeCampaign     = "campaign"
+)
+
+type subscribePromoCandidate struct {
+	SubscribeId int64      `gorm:"column:subscribe_id"`
+	RuleName    string     `gorm:"column:rule_name"`
+	RuleType    string     `gorm:"column:rule_type"`
+	PromoPrice  int64      `gorm:"column:promo_price"`
+	Params      string     `gorm:"column:params"`
+	StartTime   *time.Time `gorm:"column:start_time"`
+	EndTime     *time.Time `gorm:"column:end_time"`
+}
+
+type promoRuleParams struct {
+	WindowHours    int64 `json:"window_hours"`
+	InactiveMonths int   `json:"inactive_months"`
+}
+
+func loadSubscribePromoMap(ctx context.Context, svcCtx *svc.ServiceContext, subscribeIDs []int64) (map[int64]*types.SubscribePromo, error) {
+	result := make(map[int64]*types.SubscribePromo)
+	if len(subscribeIDs) == 0 || svcCtx == nil || svcCtx.DB == nil {
+		return result, nil
+	}
+
+	userInfo, _ := ctx.Value(constant.CtxKeyUser).(*user.User)
+	candidates, err := querySubscribePromoCandidates(ctx, svcCtx, subscribeIDs, userInfo != nil)
+	if err != nil {
+		if isMissingPromoTableError(err) {
+			return result, nil
+		}
+		return nil, err
+	}
+
+	evaluator := promoEligibilityEvaluator{ctx: ctx, db: svcCtx.DB, userInfo: userInfo}
+	now := time.Now()
+	for _, candidate := range candidates {
+		if _, exists := result[candidate.SubscribeId]; exists {
+			continue
+		}
+		if !candidate.isActive(now) {
+			continue
+		}
+		ok, expiresAt, err := evaluator.match(candidate, now)
+		if err != nil {
+			return nil, err
+		}
+		if !ok {
+			continue
+		}
+		result[candidate.SubscribeId] = &types.SubscribePromo{
+			RuleName:   candidate.RuleName,
+			RuleType:   candidate.RuleType,
+			PromoPrice: candidate.PromoPrice,
+			ExpiresAt:  unixSeconds(expiresAt),
+		}
+	}
+
+	return result, nil
+}
+
+func querySubscribePromoCandidates(ctx context.Context, svcCtx *svc.ServiceContext, subscribeIDs []int64, loggedIn bool) ([]subscribePromoCandidate, error) {
+	var candidates []subscribePromoCandidate
+	query := svcCtx.DB.WithContext(ctx).
+		Table("subscribe_promo AS sp").
+		Select("sp.subscribe_id, sp.promo_price, pr.name AS rule_name, pr.type AS rule_type, pr.params, pr.start_time, pr.end_time").
+		Joins("JOIN promo_rule AS pr ON pr.id = sp.promo_rule_id AND pr.deleted_at IS NULL").
+		Where("sp.subscribe_id IN ? AND sp.promo_price > 0 AND pr.enabled = ?", subscribeIDs, true)
+	if !loggedIn {
+		query = query.Where("pr.type = ?", promoRuleTypeCampaign)
+	}
+	err := query.
+		Order("sp.subscribe_id ASC").
+		Order("pr.priority DESC").
+		Order("pr.id ASC").
+		Scan(&candidates).Error
+	if err != nil {
+		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "query subscribe promo candidates failed: %v", err)
+	}
+	return candidates, nil
+}
+
+func (c subscribePromoCandidate) isActive(now time.Time) bool {
+	if c.PromoPrice <= 0 {
+		return false
+	}
+	if c.StartTime != nil && now.Before(*c.StartTime) {
+		return false
+	}
+	if c.EndTime != nil && now.After(*c.EndTime) {
+		return false
+	}
+	return true
+}
+
+type promoEligibilityEvaluator struct {
+	ctx        context.Context
+	db         *gorm.DB
+	userInfo   *user.User
+	lastExpire *time.Time
+}
+
+func (e *promoEligibilityEvaluator) match(candidate subscribePromoCandidate, now time.Time) (bool, time.Time, error) {
+	switch candidate.RuleType {
+	case promoRuleTypeCampaign:
+		return true, candidate.expiresAt(), nil
+	case promoRuleTypeNewUser:
+		if e.userInfo == nil {
+			return false, time.Time{}, nil
+		}
+		params, err := candidate.params()
+		if err != nil {
+			return false, time.Time{}, err
+		}
+		if params.WindowHours <= 0 || e.userInfo.CreatedAt.IsZero() {
+			return false, time.Time{}, nil
+		}
+		expiresAt := e.userInfo.CreatedAt.Add(time.Duration(params.WindowHours) * time.Hour)
+		return now.Before(expiresAt), expiresAt, nil
+	case promoRuleTypeInactiveUser:
+		if e.userInfo == nil {
+			return false, time.Time{}, nil
+		}
+		params, err := candidate.params()
+		if err != nil {
+			return false, time.Time{}, err
+		}
+		if params.InactiveMonths <= 0 {
+			return false, time.Time{}, nil
+		}
+		lastExpire, err := e.lastSubscribeExpireAt()
+		if err != nil {
+			return false, time.Time{}, err
+		}
+		if lastExpire.Equal(time.UnixMilli(0)) || lastExpire.After(now) {
+			return false, time.Time{}, nil
+		}
+		if lastExpire.IsZero() {
+			return true, candidate.expiresAt(), nil
+		}
+		threshold := now.AddDate(0, -params.InactiveMonths, 0)
+		return !lastExpire.After(threshold), candidate.expiresAt(), nil
+	default:
+		return false, time.Time{}, nil
+	}
+}
+
+func (e *promoEligibilityEvaluator) lastSubscribeExpireAt() (time.Time, error) {
+	if e.lastExpire != nil {
+		return *e.lastExpire, nil
+	}
+	var item user.Subscribe
+	err := e.db.WithContext(e.ctx).
+		Model(&user.Subscribe{}).
+		Where("user_id = ?", e.userInfo.Id).
+		Where("expire_time != ?", time.UnixMilli(0)).
+		Order("expire_time DESC").
+		Limit(1).
+		Take(&item).Error
+	if err != nil {
+		if stderrors.Is(err, gorm.ErrRecordNotFound) {
+			zero := time.Time{}
+			e.lastExpire = &zero
+			return zero, nil
+		}
+		return time.Time{}, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "query promo user last subscription failed")
+	}
+	e.lastExpire = &item.ExpireTime
+	return item.ExpireTime, nil
+}
+
+func (c subscribePromoCandidate) expiresAt() time.Time {
+	if c.EndTime == nil {
+		return time.Time{}
+	}
+	return *c.EndTime
+}
+
+func (c subscribePromoCandidate) params() (promoRuleParams, error) {
+	if c.Params == "" {
+		return promoRuleParams{}, nil
+	}
+	var params promoRuleParams
+	if err := json.Unmarshal([]byte(c.Params), &params); err != nil {
+		return promoRuleParams{}, errors.Wrapf(xerr.NewErrCode(xerr.InvalidParams), "parse promo rule params failed")
+	}
+	return params, nil
+}
+
+func unixSeconds(t time.Time) int64 {
+	if t.IsZero() {
+		return 0
+	}
+	return t.Unix()
+}
+
+func isMissingPromoTableError(err error) bool {
+	var mysqlErr *mysql.MySQLError
+	if stderrors.As(err, &mysqlErr) {
+		return mysqlErr.Number == 1146
+	}
+	return strings.Contains(err.Error(), "Error 1146")
+}