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

pkg/data/belt.go

@@ -0,0 +1,24 @@
+package game
+
+import "strings"
+
+const (
+	HealingPotion      PotionType = "HealingPotion"
+	ManaPotion         PotionType = "ManaPotion"
+	RejuvenationPotion PotionType = "RejuvenationPotion"
+)
+
+type Belt []Item
+
+func (b Belt) GetFirstPotion(potionType PotionType) (Position, bool) {
+	for _, i := range b {
+		// Ensure potion is in row 0 and one of the four columns
+		if strings.Contains(string(i.Name), string(potionType)) && i.Position.Y == 0 && (i.Position.X == 0 || i.Position.X == 1 || i.Position.X == 2 || i.Position.X == 3) {
+			return i.Position, true
+		}
+	}
+
+	return Position{}, false
+}
+
+type PotionType string