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|
package world
import (
"fmt"
"os"
"path/filepath"
"strings"
"sync"
"gopkg.in/yaml.v3"
)
const DropDespawnTicks = 1000
type groundEntry struct {
itemID string
quantity int
isSpawn bool
respawnTimer int // >0 = counting down to respawn
respawnQty int
respawnDelay int
despawnTimer int // >0 = counting down to despawn (dropped items)
}
type World struct {
dataDir string
mu sync.Mutex
groundItems map[int][]*groundEntry
seeded map[int]bool
}
func New(dataDir string) *World {
return &World{
dataDir: dataDir,
groundItems: make(map[int][]*groundEntry),
seeded: make(map[int]bool),
}
}
func (w *World) LoadRoom(id int) (*Room, error) {
path := filepath.Join(w.dataDir, "rooms", fmt.Sprintf("%d.yaml", id))
data, err := os.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("read room %d: %w", id, err)
}
var room Room
if err := yaml.Unmarshal(data, &room); err != nil {
return nil, fmt.Errorf("parse room %d: %w", id, err)
}
room.ID = id
if room.Exits == nil {
room.Exits = make(map[ExitDir]int)
}
if room.Objects == nil {
room.Objects = make([]string, 0)
}
if room.Spawns == nil {
room.Spawns = make([]SpawnDef, 0)
}
if room.Mobs == nil {
room.Mobs = make([]string, 0)
}
return &room, nil
}
func (w *World) ResolveExit(input string) ExitDir {
if dir, ok := ExitAliases[strings.ToLower(input)]; ok {
return dir
}
canon := ExitDir(strings.ToLower(input))
switch canon {
case North, South, East, West, Up, Down:
return canon
}
return ""
}
func (w *World) GroundItems(roomID int) map[string]int {
w.mu.Lock()
defer w.mu.Unlock()
out := make(map[string]int)
for _, e := range w.groundItems[roomID] {
if e.quantity > 0 {
out[e.itemID] += e.quantity
}
}
return out
}
func (w *World) AddGroundItem(roomID int, itemID string, qty int) {
w.mu.Lock()
defer w.mu.Unlock()
e := &groundEntry{
itemID: itemID,
quantity: qty,
despawnTimer: DropDespawnTicks,
}
w.groundItems[roomID] = append(w.groundItems[roomID], e)
}
func (w *World) RemoveGroundItem(roomID int, itemID string, qty int) int {
w.mu.Lock()
defer w.mu.Unlock()
removed := 0
remaining := qty
for _, e := range w.groundItems[roomID] {
if remaining <= 0 {
break
}
if !strings.EqualFold(e.itemID, itemID) {
continue
}
if e.quantity <= 0 {
continue
}
take := e.quantity
if take > remaining {
take = remaining
}
e.quantity -= take
removed += take
remaining -= take
if e.isSpawn && e.quantity <= 0 && e.respawnDelay > 0 {
e.respawnTimer = e.respawnDelay
}
}
return removed
}
func (w *World) SeedGroundItems(roomID int) {
w.mu.Lock()
if w.seeded[roomID] {
w.mu.Unlock()
return
}
w.seeded[roomID] = true
w.mu.Unlock()
room, err := w.LoadRoom(roomID)
if err != nil {
return
}
w.mu.Lock()
defer w.mu.Unlock()
for _, s := range room.Spawns {
e := &groundEntry{
itemID: s.ItemID,
quantity: s.Quantity,
isSpawn: true,
respawnDelay: s.RespawnTicks,
respawnQty: s.Quantity,
}
w.groundItems[roomID] = append(w.groundItems[roomID], e)
}
}
func (w *World) Tick() {
w.mu.Lock()
defer w.mu.Unlock()
for _, entries := range w.groundItems {
for _, e := range entries {
if e.respawnTimer > 0 {
e.respawnTimer--
if e.respawnTimer <= 0 {
e.quantity = e.respawnQty
}
}
if e.despawnTimer > 0 {
e.despawnTimer--
if e.despawnTimer <= 0 {
e.quantity = 0
}
}
}
}
}
|
