50 lines
1.4 KiB
Go
Executable File
50 lines
1.4 KiB
Go
Executable File
package user
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import (
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"context"
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"errors"
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"strconv"
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"go.uber.org/zap"
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)
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// RedeemItemCard 积分兑换道具卡
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func (s *service) RedeemItemCard(ctx context.Context, userID int64, cardID int64, quantity int) (ledgerID int64, err error) {
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if quantity <= 0 {
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quantity = 1
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}
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// 1. 查卡
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tpl, err := s.readDB.SystemItemCards.WithContext(ctx).Where(s.readDB.SystemItemCards.ID.Eq(cardID), s.readDB.SystemItemCards.Status.Eq(1)).First()
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if err != nil {
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return 0, errors.New("item card not found")
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}
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// 2. 算分 - tpl.Price 是道具卡价格（分），直接用于扣除
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needCents := tpl.Price * int64(quantity)
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if needCents <= 0 {
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needCents = 1
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}
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// 3. 扣分 (调用现有 Service)
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ledgerID, err = s.ConsumePointsFor(ctx, userID, needCents, "system_item_cards", strconv.FormatInt(cardID, 10), "redeem item card", "redeem_item_card")
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if err != nil {
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return 0, err
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}
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// 4. 发卡 (如果失败，执行退分)
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if err := s.AddItemCard(ctx, userID, cardID, quantity); err != nil {
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s.logger.Error("failed to add item card after point consumption",
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zap.Int64("user_id", userID),
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zap.Int64("card_id", cardID),
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zap.Int64("ledger_id", ledgerID),
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zap.Error(err),
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)
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// 自动退分
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_, _ = s.RefundPoints(ctx, userID, needCents, strconv.FormatInt(ledgerID, 10), "refund: grant item card failed")
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return ledgerID, errors.New("failed to grant item card: " + err.Error())
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}
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return ledgerID, nil
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}
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