修复(#84): 补齐促销管理API实现文件

Co-authored-by: multica-agent <github@multica.ai>

internal/logic/admin/promo/deletePromoPriceLogic.go

@@ -0,0 +1,45 @@
+package promo
+
+import (
+	"context"
+
+	promoModel "github.com/perfect-panel/server/internal/model/promo"
+	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/internal/types"
+	"github.com/perfect-panel/server/pkg/logger"
+	"github.com/perfect-panel/server/pkg/xerr"
+	"github.com/pkg/errors"
+)
+
+type DeletePromoPriceLogic struct {
+	logger.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// Delete promo price
+func NewDeletePromoPriceLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeletePromoPriceLogic {
+	return &DeletePromoPriceLogic{
+		Logger: logger.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *DeletePromoPriceLogic) DeletePromoPrice(req *types.DeletePromoPriceRequest) error {
+	data, err := l.svcCtx.PromoModel.FindSubscribePromo(l.ctx, req.Id)
+	if err != nil {
+		if promoModel.IsNotFound(err) {
+			return xerr.NewErrCodeMsg(xerr.InvalidParams, "promo price not found")
+		}
+		l.Errorw("[DeletePromoPrice] Database Query Error", logger.Field("error", err.Error()))
+		return wrapQueryError("get promo price failed", err)
+	}
+
+	if err = l.svcCtx.PromoModel.DeleteSubscribePromo(l.ctx, req.Id); err != nil {
+		l.Errorw("[DeletePromoPrice] Database Delete Error", logger.Field("error", err.Error()))
+		return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseDeletedError), "delete promo price failed: %v", err.Error())
+	}
+	clearSubscribePromoCache(l.ctx, l.svcCtx, data.SubscribeId)
+	return nil
+}