up3

server/item/chestplate.go

@@ -0,0 +1,122 @@
+package item
+
+import (
+	"github.com/df-mc/dragonfly/server/world"
+	"image/color"
+)
+
+// Chestplate is a defensive item that may be equipped in the chestplate slot. Generally, chestplates provide
+// the most defence of all armour items.
+type Chestplate struct {
+	// Tier is the tier of the chestplate.
+	Tier ArmourTier
+	// Trim specifies the trim of the armour.
+	Trim ArmourTrim
+}
+
+// Use handles the using of a chestplate to auto-equip it in the designated armour slot.
+func (c Chestplate) Use(_ *world.Tx, _ User, ctx *UseContext) bool {
+	ctx.SwapHeldWithArmour(1)
+	return false
+}
+
+// MaxCount always returns 1.
+func (c Chestplate) MaxCount() int {
+	return 1
+}
+
+// DefencePoints ...
+func (c Chestplate) DefencePoints() float64 {
+	switch c.Tier.Name() {
+	case "leather":
+		return 3
+	case "copper":
+		return 4
+	case "golden", "chainmail":
+		return 5
+	case "iron":
+		return 6
+	case "diamond", "netherite":
+		return 8
+	}
+	panic("invalid chestplate tier")
+}
+
+// Toughness ...
+func (c Chestplate) Toughness() float64 {
+	return c.Tier.Toughness()
+}
+
+// KnockBackResistance ...
+func (c Chestplate) KnockBackResistance() float64 {
+	return c.Tier.KnockBackResistance()
+}
+
+// EnchantmentValue ...
+func (c Chestplate) EnchantmentValue() int {
+	return c.Tier.EnchantmentValue()
+}
+
+// DurabilityInfo ...
+func (c Chestplate) DurabilityInfo() DurabilityInfo {
+	return DurabilityInfo{
+		MaxDurability: int(c.Tier.BaseDurability() + c.Tier.BaseDurability()/2.2),
+		BrokenItem:    simpleItem(Stack{}),
+	}
+}
+
+// SmeltInfo ...
+func (c Chestplate) SmeltInfo() SmeltInfo {
+	switch c.Tier.(type) {
+	case ArmourTierIron, ArmourTierChain:
+		return newOreSmeltInfo(NewStack(IronNugget{}, 1), 0.1)
+	case ArmourTierGold:
+		return newOreSmeltInfo(NewStack(GoldNugget{}, 1), 0.1)
+	case ArmourTierCopper:
+		return newOreSmeltInfo(NewStack(CopperNugget{}, 1), 0.1)
+	}
+	return SmeltInfo{}
+}
+
+// RepairableBy ...
+func (c Chestplate) RepairableBy(i Stack) bool {
+	return armourTierRepairable(c.Tier)(i)
+}
+
+// Chestplate ...
+func (c Chestplate) Chestplate() bool {
+	return true
+}
+
+// WithTrim ...
+func (c Chestplate) WithTrim(trim ArmourTrim) world.Item {
+	c.Trim = trim
+	return c
+}
+
+// EncodeItem ...
+func (c Chestplate) EncodeItem() (name string, meta int16) {
+	return "minecraft:" + c.Tier.Name() + "_chestplate", 0
+}
+
+// DecodeNBT ...
+func (c Chestplate) DecodeNBT(data map[string]any) any {
+	if t, ok := c.Tier.(ArmourTierLeather); ok {
+		if v, ok := data["customColor"].(int32); ok {
+			t.Colour = rgbaFromInt32(v)
+			c.Tier = t
+		}
+	}
+	c.Trim = readTrim(data)
+	return c
+}
+
+// EncodeNBT ...
+func (c Chestplate) EncodeNBT() map[string]any {
+	m := map[string]any{}
+	if t, ok := c.Tier.(ArmourTierLeather); ok && t.Colour != (color.RGBA{}) {
+		m["customColor"] = int32FromRGBA(t.Colour)
+	}
+	writeTrim(m, c.Trim)
+	return m
+}