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|
package server
import (
"io"
"os"
"fmt"
"bufio"
"git.citrons.xyz/metronode/phony"
)
type levelId int32
type levelPlayerId int8
type levelInfo struct {
Id levelId
Size blockPos
IsSpawn bool
}
type level struct {
phony.Inbox
levelInfo
loadingState int
server *Server
mapM *mapManager // is accessed without synchronization
ids map[levelPlayerId]*player
players map[*player]levelPlayerId
}
const (
levelUnloaded = iota
levelLoading
levelLoaded
)
func initLevel(s *Server, info levelInfo) *level {
return &level {
levelInfo: info,
server: s,
loadingState: levelUnloaded,
mapM: newMapManager(info.Size),
ids: make(map[levelPlayerId]*player),
players: make(map[*player]levelPlayerId),
}
}
func createNewLevel(s *Server, info levelInfo) *level {
l := initLevel(s, info)
l.loadingState = levelLoading
return l
}
func (l *level) load() {
if l.loadingState == levelUnloaded {
l.loadingState = levelLoading
var (
id = l.Id
v = l.mapM.Blocks
)
dataManager.Act(l, func() {
f, err := os.Open(fmt.Sprintf("world/level/%d.bin", id))
if l.handleLoadError(err) != nil {
return
}
defer f.Close()
var (
rd = bufio.NewReader(f)
info levelInfo
)
readDataField(rd, &info)
v.init(info.Size)
err = v.syncDecompressFromStorage(rd)
if l.handleLoadError(err) != nil {
return
}
l.Act(&dataManager, func() {
l.levelInfo = info
l.Id = id
l.loadDone()
})
})
}
}
func (l *level) loadDone() {
if l.loadingState == levelLoaded {
return
}
l.loadingState = levelLoaded
for player := range l.players {
player.OnLevelData(
l, l.levelInfo, l.mapM.Blocks.syncCompressForNetwork(),
)
}
}
func (l *level) handleLoadError(err error) error {
if err == nil {
return err
}
l.Act(&dataManager, func() {
l.loadingState = levelUnloaded
dataManager.errHand.OnLoadError(l, err)
errString := "load level: " + err.Error()
if os.IsNotExist(err) {
errString = "level not found"
}
l.LevelError(nil, errString)
})
return err
}
func (l *level) LevelError(from phony.Actor, err string) {
l.Act(from, func() {
for player := range l.players {
player.OnLevelError(l, err, l.levelInfo)
}
})
}
func (l *level) save(done func()) {
if done != nil {
defer dataManager.Act(nil, done)
}
if l.loadingState != levelLoaded {
return
}
os.Mkdir("world/level", 0777)
f, err := createAtomic(l, fmt.Sprintf("world/level/%d.bin", l.Id))
if err != nil {
dataManager.errHand.OnSaveError(l, err)
return
}
data := l.mapM.Blocks.syncCompressForStorage()
go func() {
defer f.Close()
defer data.Close()
wr := bufio.NewWriter(f)
writeDataField(wr, l.levelInfo)
io.Copy(wr, data)
if wr.Flush() != nil {
dataManager.errHand.OnSaveError(l, err)
return
}
}()
}
func (l *level) Save(from phony.Actor, done func()) {
l.Act(from, func() {
l.save(func() {
if done != nil {
from.Act(nil, done)
}
})
})
}
func (l *level) SetBlock(from phony.Actor, pos blockPos, block blockType) {
if l.loadingState != levelLoaded {
return
}
l.mapM.SetBlock(from, pos, block)
l.Act(from, func() {
for player := range l.players {
player.OnSetBlock(l, pos, block)
}
})
}
func (l *level) TrySetBlock(
from phony.Actor, pos blockPos, block blockType, auth authLevel,
reject func(realBlock blockType)) {
l.mapM.GetBlock(from, pos, func(curBlock blockType) {
if blockDefinitions[curBlock].AuthLevel > auth {
from.Act(nil, func() {reject(curBlock)})
return
}
def, ok := blockDefinitions[block]
if !ok && block > blockStoneBricks {
from.Act(nil, func() {reject(curBlock)})
return
}
if def.AuthLevel > auth {
from.Act(nil, func() {reject(curBlock)})
return
}
l.SetBlock(nil, pos, block)
})
}
func (l *level) OnAddPlayer(from *player, name string, pos entityPos) {
l.Act(from, func() {
l.load()
if l.loadingState == levelLoaded {
from.OnLevelData(
l, l.levelInfo, l.mapM.Blocks.syncCompressForNetwork(),
)
}
var newId levelPlayerId
for newId = 0; newId <= 127; newId++ {
if l.ids[newId] == nil {
break
}
}
if newId == -1 {
from.OnLevelError(
l, "there are too many players in this area", l.levelInfo,
)
}
for player, id := range l.players {
if player != from {
player.OnPlayer(l, newId, name, pos)
player.GetInfo(l,
func(name string, state playerState) {
from.OnPlayer(l, id, name, state.Pos)
},
)
}
}
l.ids[newId] = from
l.players[from] = newId
})
}
func (l *level) OnRemovePlayer(from *player) {
l.Act(from, func() {
delId := l.players[from]
delete(l.ids, delId)
delete(l.players, from)
for player := range l.players {
player.OnRemovePlayer(l, delId)
}
})
}
func (l *level) OnMovePlayer(
from *player, pos entityPos, facing entityFacing) {
l.Act(from, func() {
for player := range l.players {
if player != from {
player.OnMovePlayer(l, l.players[from], pos, facing)
}
}
})
}
|
