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/deletePromoRuleLogic.go

@@ -0,0 +1,39 @@
+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 DeletePromoRuleLogic struct {
+	logger.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// Delete promo rule
+func NewDeletePromoRuleLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeletePromoRuleLogic {
+	return &DeletePromoRuleLogic{
+		Logger: logger.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *DeletePromoRuleLogic) DeletePromoRule(req *types.DeletePromoRuleRequest) error {
+	if err := l.svcCtx.PromoModel.DeleteRule(l.ctx, req.Id); err != nil {
+		if promoModel.IsNotFound(err) {
+			return xerr.NewErrCodeMsg(xerr.InvalidParams, "promo rule not found")
+		}
+		l.Errorw("[DeletePromoRule] Database Delete Error", logger.Field("error", err.Error()))
+		return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseDeletedError), "delete promo rule failed: %v", err.Error())
+	}
+	clearRuleCache(l.ctx, l.svcCtx)
+	return nil
+}