up3

server/item/enchantment/power.go

@@ -0,0 +1,48 @@
+package enchantment
+
+import (
+	"github.com/df-mc/dragonfly/server/item"
+	"github.com/df-mc/dragonfly/server/world"
+)
+
+// Power is a bow enchantment which increases arrow damage.
+var Power power
+
+type power struct{}
+
+// Name ...
+func (power) Name() string {
+	return "Power"
+}
+
+// MaxLevel ...
+func (power) MaxLevel() int {
+	return 5
+}
+
+// Cost ...
+func (power) Cost(level int) (int, int) {
+	minCost := 1 + (level-1)*10
+	return minCost, minCost + 15
+}
+
+// Rarity ...
+func (power) Rarity() item.EnchantmentRarity {
+	return item.EnchantmentRarityCommon
+}
+
+// PowerDamage returns the extra base damage dealt by the enchantment and level.
+func (power) PowerDamage(level int) float64 {
+	return float64(level+1) * 0.5
+}
+
+// CompatibleWithEnchantment ...
+func (power) CompatibleWithEnchantment(item.EnchantmentType) bool {
+	return true
+}
+
+// CompatibleWithItem ...
+func (power) CompatibleWithItem(i world.Item) bool {
+	_, ok := i.(item.Bow)
+	return ok
+}