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/getPromoPriceListLogic.go

@@ -0,0 +1,50 @@
+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"
+)
+
+type GetPromoPriceListLogic struct {
+	logger.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// Get promo price list
+func NewGetPromoPriceListLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetPromoPriceListLogic {
+	return &GetPromoPriceListLogic{
+		Logger: logger.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *GetPromoPriceListLogic) GetPromoPriceList(req *types.GetPromoPriceListRequest) (*types.GetPromoPriceListResponse, error) {
+	total, list, err := l.svcCtx.PromoModel.QuerySubscribePromoList(l.ctx, promoModel.SubscribePromoFilter{
+		Page:        int(req.Page),
+		Size:        int(req.Size),
+		PromoRuleId: req.PromoRuleId,
+	})
+	if err != nil {
+		l.Errorw("[GetPromoPriceList] Database Error", logger.Field("error", err.Error()))
+		return nil, wrapQueryError("get promo price list failed", err)
+	}
+	resp := &types.GetPromoPriceListResponse{
+		Total: total,
+		List:  make([]types.PromoPrice, 0, len(list)),
+	}
+	for _, item := range list {
+		var unitPrice int64
+		sub, subErr := l.svcCtx.SubscribeModel.FindOne(l.ctx, item.SubscribeId)
+		if subErr == nil {
+			unitPrice = sub.UnitPrice
+		}
+		resp.List = append(resp.List, toPriceResponse(item, unitPrice))
+	}
+	return resp, nil
+}