93 lines
3.1 KiB
Go
93 lines
3.1 KiB
Go
package welfare_activity
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import (
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"context"
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"errors"
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"fmt"
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"time"
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)
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func (s *service) Join(ctx context.Context, activityID int64, userID int64) error {
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if activityID <= 0 || userID <= 0 {
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return errors.New("活动或用户无效")
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}
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var activity Activity
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if err := s.repo.GetDbR().WithContext(ctx).Where("id = ? AND deleted_at IS NULL", activityID).First(&activity).Error; err != nil {
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return err
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}
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now := time.Now()
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if !isJoinWindowOpen(activity, now) {
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if now.Before(activity.StartTime) {
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return errors.New("活动未开始")
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}
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return errors.New("当前不在活动参与时间内")
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}
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var existing int64
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if err := s.repo.GetDbW().WithContext(ctx).Model(&Participant{}).Where("activity_id = ? AND user_id = ?", activityID, userID).Count(&existing).Error; err != nil {
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return err
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}
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if existing > 0 {
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return errors.New("已参与该活动")
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}
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start, end, period := activityStatsRange(activity)
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paid, err := s.sumPaidAmount(ctx, userID, start, end)
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if err != nil {
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return err
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}
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if paid < activity.ThresholdAmount {
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return fmt.Errorf("未达到参与门槛，还差%d分", activity.ThresholdAmount-paid)
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}
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participant := &Participant{ActivityID: activityID, UserID: userID, PeriodKey: period, PaidAmountSnapshot: paid}
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return s.repo.GetDbW().WithContext(ctx).Create(participant).Error
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}
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func (s *service) ListParticipants(ctx context.Context, activityID int64, page int, pageSize int) (*ParticipantResponse, error) {
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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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var total int64
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db := s.repo.GetDbR().WithContext(ctx).Table("welfare_activity_participants").Where("activity_id = ?", activityID)
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if err := db.Count(&total).Error; err != nil {
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return nil, err
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}
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var list []ParticipantAvatar
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err := s.repo.GetDbR().WithContext(ctx).Table("welfare_activity_participants p").
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Select("p.user_id, COALESCE(u.nickname, '') AS nickname, COALESCE(u.avatar, '') AS avatar").
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Joins("LEFT JOIN users u ON u.id = p.user_id").
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Where("p.activity_id = ?", activityID).
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Order("p.id DESC").
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Offset((page - 1) * pageSize).
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Limit(pageSize).
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Scan(&list).Error
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return &ParticipantResponse{Page: page, PageSize: pageSize, Total: total, List: list}, err
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}
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func (s *service) sumPaidAmount(ctx context.Context, userID int64, start time.Time, end time.Time) (int64, error) {
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var total int64
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err := s.repo.GetDbR().WithContext(ctx).Table("orders").
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Select("COALESCE(SUM(actual_amount), 0)").
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Where("user_id = ? AND status = 2 AND actual_amount > 0", userID).
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Where("COALESCE(NULLIF(paid_at, '1970-01-01 00:00:00'), created_at) >= ?", start).
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Where("COALESCE(NULLIF(paid_at, '1970-01-01 00:00:00'), created_at) < ?", end).
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Scan(&total).Error
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return total, err
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}
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func activityStatsRange(activity Activity) (time.Time, time.Time, string) {
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return activity.StartTime, exclusiveEndTime(activity.EndTime), activityPeriodKey(activity)
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}
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func exclusiveEndTime(end time.Time) time.Time {
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return end.Add(time.Second)
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}
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func activityPeriodKey(activity Activity) string {
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return fmt.Sprintf("%016x", uint64(activity.ID))
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}
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