up3

server/item/enchantment/projectile_protection.go

@@ -0,0 +1,49 @@
+package enchantment
+
+import (
+	"github.com/df-mc/dragonfly/server/item"
+	"github.com/df-mc/dragonfly/server/world"
+)
+
+// ProjectileProtection is an armour enchantment that reduces damage from
+// projectiles.
+var ProjectileProtection projectileProtection
+
+type projectileProtection struct{}
+
+// Name ...
+func (projectileProtection) Name() string {
+	return "Projectile Protection"
+}
+
+// MaxLevel ...
+func (projectileProtection) MaxLevel() int {
+	return 4
+}
+
+// Cost ...
+func (projectileProtection) Cost(level int) (int, int) {
+	minCost := 3 + (level-1)*6
+	return minCost, minCost + 6
+}
+
+// Rarity ...
+func (projectileProtection) Rarity() item.EnchantmentRarity {
+	return item.EnchantmentRarityUncommon
+}
+
+// Modifier returns the base protection modifier for the enchantment.
+func (projectileProtection) Modifier() float64 {
+	return 0.08
+}
+
+// CompatibleWithEnchantment ...
+func (projectileProtection) CompatibleWithEnchantment(t item.EnchantmentType) bool {
+	return t != BlastProtection && t != FireProtection && t != Protection
+}
+
+// CompatibleWithItem ...
+func (projectileProtection) CompatibleWithItem(i world.Item) bool {
+	_, ok := i.(item.Armour)
+	return ok
+}