120 lines
3.0 KiB
Go
120 lines
3.0 KiB
Go
package mapping
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import (
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"encoding/json"
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"github.com/sandertv/gophertunnel/minecraft/nbt"
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"sync"
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)
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type Item interface {
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// ItemRuntimeIDToName converts an item runtime ID to a string ID.
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ItemRuntimeIDToName(int32) (string, bool)
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// ItemNameToRuntimeID converts a string ID to an item runtime ID.
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ItemNameToRuntimeID(string) (int32, bool)
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RegisterEntry(string) int32
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RegisterEntryRID(string, int32)
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Air() int32
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ItemVersion() uint16
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}
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type DefaultItemMapping struct {
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mu sync.Mutex
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// itemRuntimeIDsToNames holds a map to translate item runtime IDs to string IDs.
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itemRuntimeIDsToNames map[int32]string
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// itemNamesToRuntimeIDs holds a map to translate item string IDs to runtime IDs.
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itemNamesToRuntimeIDs map[string]int32
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airRID int32
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itemVersion uint16
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}
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func NewItemMapping(itemRuntimeIDData []byte, requiredItemList []byte, itemVersion uint16, direct bool) *DefaultItemMapping {
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itemRuntimeIDsToNames := make(map[int32]string)
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itemNamesToRuntimeIDs := make(map[string]int32)
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var airRID *int32
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if direct {
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var items map[string]int32
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if err := nbt.Unmarshal(itemRuntimeIDData, &items); err != nil {
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panic(err)
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}
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for name, rid := range items {
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if name == "minecraft:air" {
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airRID = &rid
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}
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itemNamesToRuntimeIDs[name] = rid
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itemRuntimeIDsToNames[rid] = name
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}
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} else {
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var m map[string]struct {
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RuntimeID int16 `json:"runtime_id"`
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ComponentBased bool `json:"component_based"`
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}
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if err := json.Unmarshal(requiredItemList, &m); err != nil {
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panic(err)
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}
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for name, data := range m {
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rid := int32(data.RuntimeID)
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if name == "minecraft:air" {
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airRID = &rid
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}
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itemNamesToRuntimeIDs[name] = rid
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itemRuntimeIDsToNames[rid] = name
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}
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}
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if airRID == nil {
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panic("couldn't find air")
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}
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return &DefaultItemMapping{itemRuntimeIDsToNames: itemRuntimeIDsToNames, itemNamesToRuntimeIDs: itemNamesToRuntimeIDs, itemVersion: itemVersion}
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}
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func (m *DefaultItemMapping) ItemRuntimeIDToName(runtimeID int32) (name string, found bool) {
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defer m.mu.Unlock()
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m.mu.Lock()
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name, ok := m.itemRuntimeIDsToNames[runtimeID]
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return name, ok
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}
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func (m *DefaultItemMapping) ItemNameToRuntimeID(name string) (runtimeID int32, found bool) {
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defer m.mu.Unlock()
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m.mu.Lock()
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rid, ok := m.itemNamesToRuntimeIDs[name]
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return rid, ok
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}
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func (m *DefaultItemMapping) RegisterEntry(name string) int32 {
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defer m.mu.Unlock()
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m.mu.Lock()
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if rid, ok := m.itemNamesToRuntimeIDs[name]; ok {
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return rid
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}
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nextRID := int32(len(m.itemRuntimeIDsToNames))
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m.itemNamesToRuntimeIDs[name] = nextRID
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m.itemRuntimeIDsToNames[nextRID] = name
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return nextRID
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}
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func (m *DefaultItemMapping) RegisterEntryRID(name string, rid int32) {
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defer m.mu.Unlock()
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m.mu.Lock()
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if _, ok := m.itemNamesToRuntimeIDs[name]; !ok {
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m.itemNamesToRuntimeIDs[name] = rid
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m.itemRuntimeIDsToNames[rid] = name
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}
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}
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func (m *DefaultItemMapping) Air() int32 {
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defer m.mu.Unlock()
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m.mu.Lock()
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return m.airRID
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}
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func (m *DefaultItemMapping) ItemVersion() uint16 {
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defer m.mu.Unlock()
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m.mu.Lock()
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return m.itemVersion
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}
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