proper inventory counting and smartshop creative flag

fixes #48

mapblockparser/mapblock.go

@@ -66,7 +66,7 @@ func getNodePos(x, y, z int) int {
 }
 
 func (inv *Inventory) IsEmpty() bool {
-	if inv.Size == 0 || len(inv.Items) == 0 {
+	if len(inv.Items) == 0 {
 		return true
 	}
 

mapblockparser/metadata.go

@@ -155,6 +155,7 @@ func parseMetadata(mapblock *MapBlock, data []byte) (int, error) {
 					}
 
 					currentInventory.Items = append(currentInventory.Items, &item)
+					currentInventory.Size += 1
 
 				}
 

mapobject/smartshop.go

@@ -15,6 +15,7 @@ func (this *SmartShopBlock) onMapObject(x, y, z int, block *mapblockparser.MapBl
 	md := block.Metadata.GetMetadata(x, y, z)
 	invMap := block.Metadata.GetInventoryMapAtPos(x, y, z)
 	mainInv := invMap["main"]
+	isCreative := md["type"] == "0"
 
 	if mainInv.IsEmpty() {
 		return list
@@ -27,7 +28,7 @@ func (this *SmartShopBlock) onMapObject(x, y, z int, block *mapblockparser.MapBl
 		pay := invMap[payInvName]
 		give := invMap[giveInvName]
 
-		if pay.IsEmpty() || give.IsEmpty() {
+		if len(pay.Items) == 0 || len(give.Items) == 0 {
 			continue
 		}
 
@@ -43,12 +44,18 @@ func (this *SmartShopBlock) onMapObject(x, y, z int, block *mapblockparser.MapBl
 
 		stock := 0
 
+		if isCreative {
+			stock = 999
+
+		} else {
 			for _, item := range mainInv.Items {
 				if item.Name == out_item {
 					stock += item.Count
 				}
 			}
 
+		}
+
 		//multiples of out_count
 		stock_factor := math.Floor(float64(stock) / float64(out_count))