Add data structures, it requires tons of refactor but it's more or less working

pkg/data/items.go

@@ -0,0 +1,45 @@
+package game
+
+import (
+	"github.com/hectorgimenez/d2go/pkg/data/item"
+	"github.com/hectorgimenez/d2go/pkg/data/stat"
+	"strings"
+)
+
+type Items struct {
+	Belt      Belt
+	Inventory Inventory
+	Shop      []Item
+	Ground    []Item
+	Equipped  []Item
+}
+
+type Inventory []Item
+type UnitID int
+
+type Item struct {
+	UnitID
+	Name       item.Name
+	Quality    item.Quality
+	Position   Position
+	Ethereal   bool
+	IsHovered  bool
+	Stats      map[stat.Stat]int
+	Identified bool
+	IsVendor   bool
+}
+
+func (i Item) IsPotion() bool {
+	return i.IsHealingPotion() || i.IsManaPotion() || i.IsRejuvPotion()
+}
+
+func (i Item) IsHealingPotion() bool {
+	return strings.Contains(string(i.Name), string(HealingPotion))
+}
+
+func (i Item) IsManaPotion() bool {
+	return strings.Contains(string(i.Name), string(ManaPotion))
+}
+func (i Item) IsRejuvPotion() bool {
+	return strings.Contains(string(i.Name), string(RejuvenationPotion))
+}