remove demo game

item.inventory.go

@@ -0,0 +1,46 @@
+package pncdsl
+
+type Inventory struct {
+	items    []string
+	selected string
+}
+
+func NewInventory() *Inventory { return &Inventory{} }
+
+func (i *Inventory) Add(name string) {
+	if i.Has(name) {
+		return
+	}
+	i.items = append(i.items, name)
+}
+
+func (i *Inventory) Remove(name string) {
+	for k, n := range i.items {
+		if n == name {
+			i.items = append(i.items[:k], i.items[k+1:]...)
+			if i.selected == name {
+				i.selected = ""
+			}
+			return
+		}
+	}
+}
+
+func (i *Inventory) Has(name string) bool {
+	for _, n := range i.items {
+		if n == name {
+			return true
+		}
+	}
+	return false
+}
+
+func (i *Inventory) Select(name string) {
+	if name != "" && !i.Has(name) {
+		return
+	}
+	i.selected = name
+}
+
+func (i *Inventory) Selected() string { return i.selected }
+func (i *Inventory) Items() []string  { return append([]string(nil), i.items...) }