feat(node): add PreViewNodeMultiplier endpoint and response structure

internal/logic/admin/system/preViewNodeMultiplierLogic.go

@@ -0,0 +1,33 @@
+package system
+
+import (
+	"context"
+	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/internal/types"
+	"github.com/perfect-panel/server/pkg/logger"
+	"time"
+)
+
+type PreViewNodeMultiplierLogic struct {
+	logger.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// PreView Node Multiplier
+func NewPreViewNodeMultiplierLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PreViewNodeMultiplierLogic {
+	return &PreViewNodeMultiplierLogic{
+		Logger: logger.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *PreViewNodeMultiplierLogic) PreViewNodeMultiplier() (resp *types.PreViewNodeMultiplierResponse, err error) {
+	now := time.Now()
+	ratio := l.svcCtx.NodeMultiplierManager.GetMultiplier(now)
+	return &types.PreViewNodeMultiplierResponse{
+		Ratio:       ratio,
+		CurrentTime: now.Format("2006-01-02 15:04:05"),
+	}, nil
+}