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mc/server/session/handler_smithing.go
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2026-07-09 08:33:57 +08:00
package session
import (
"fmt"
"github.com/df-mc/dragonfly/server/item"
"github.com/df-mc/dragonfly/server/item/recipe"
"github.com/df-mc/dragonfly/server/world"
"github.com/sandertv/gophertunnel/minecraft/protocol"
)
const (
// smithingInputSlot is the slot index of the input item in the smithing table.
smithingInputSlot = 0x33
// smithingMaterialSlot is the slot index of the material in the smithing table.
smithingMaterialSlot = 0x34
// smithingTemplateSlot is the slot index of the template item in the smithing table.
smithingTemplateSlot = 0x35
)
// handleSmithing handles a CraftRecipe stack request action made using a smithing table.
func (h *ItemStackRequestHandler) handleSmithing(a *protocol.CraftRecipeStackRequestAction, s *Session, tx *world.Tx) error {
// First, check the recipe and ensure it is valid for the smithing table.
craft, ok := s.recipes[a.RecipeNetworkID]
if !ok {
return fmt.Errorf("recipe with network id %v does not exist", a.RecipeNetworkID)
}
if craft.Block() != "smithing_table" {
return fmt.Errorf("recipe with network id %v is not a smithing table recipe", a.RecipeNetworkID)
}
switch craft.(type) {
case recipe.SmithingTransform, recipe.SmithingTrim:
default:
return fmt.Errorf("recipe with network id %v is not a smithing recipe", a.RecipeNetworkID)
}
// Check if the input item and material item match what the recipe requires.
expectedInputs := craft.Input()
input, _ := h.itemInSlot(protocol.StackRequestSlotInfo{
Container: protocol.FullContainerName{ContainerID: protocol.ContainerSmithingTableInput},
Slot: smithingInputSlot,
}, s, tx)
if !matchingStacks(input, expectedInputs[0]) {
return fmt.Errorf("input item is not the same as expected input")
}
material, _ := h.itemInSlot(protocol.StackRequestSlotInfo{
Container: protocol.FullContainerName{ContainerID: protocol.ContainerSmithingTableMaterial},
Slot: smithingMaterialSlot,
}, s, tx)
if !matchingStacks(material, expectedInputs[1]) {
return fmt.Errorf("material item is not the same as expected material")
}
template, _ := h.itemInSlot(protocol.StackRequestSlotInfo{
Container: protocol.FullContainerName{ContainerID: protocol.ContainerSmithingTableTemplate},
Slot: smithingTemplateSlot,
}, s, tx)
if !matchingStacks(template, expectedInputs[2]) {
return fmt.Errorf("template item is not the same as expected template")
}
// Create the output using the input stack as reference and the recipe's output item type.
h.setItemInSlot(protocol.StackRequestSlotInfo{
Container: protocol.FullContainerName{ContainerID: protocol.ContainerSmithingTableInput},
Slot: smithingInputSlot,
}, input.Grow(-1), s, tx)
h.setItemInSlot(protocol.StackRequestSlotInfo{
Container: protocol.FullContainerName{ContainerID: protocol.ContainerSmithingTableMaterial},
Slot: smithingMaterialSlot,
}, material.Grow(-1), s, tx)
h.setItemInSlot(protocol.StackRequestSlotInfo{
Container: protocol.FullContainerName{ContainerID: protocol.ContainerSmithingTableTemplate},
Slot: smithingTemplateSlot,
}, template.Grow(-1), s, tx)
if _, ok = craft.(recipe.SmithingTrim); ok {
var trim item.ArmourTrim
if t, ok := template.Item().(item.SmithingTemplate); ok {
trim.Template = t.Template
} else {
return fmt.Errorf("template item is not a smithing template")
}
if trim.Material, ok = material.Item().(item.ArmourTrimMaterial); !ok {
return fmt.Errorf("material item is not an armour trim material")
}
trimmable, ok := input.Item().(item.Trimmable)
if !ok {
return fmt.Errorf("input item is not trimmable")
}
return h.createResults(s, tx, input.WithItem(trimmable.WithTrim(trim)))
}
return h.createResults(s, tx, input.WithItem(craft.Output()[0].Item()))
}